УСТАНОВКА ДЛЯ ПОДАЧИ ВОЗДУХА С ЭЛЕКТРОННЫМ ПРЕОБРАЗОВАТЕЛЕМ ТОКА

Изобретение относится к устройствам тормозных систем. Установка для подачи воздуха содержит приводимый в действие двигателем (1) компрессор (2) для производства сжатого воздуха, устройство (3) для осушки для удаления влаги из произведенного сжатого воздуха, электронный преобразователь (4) тока для зависящего от потребления управления компрессором и несколько аналоговых и/или цифровых датчиков (5) для генерации электрических сигналов. Электрические сигналы используются для управления электронным преобразователем (4) тока и для контроля работы и управления компрессором (2). При этом в электронном преобразователе (4) тока осуществляется переработка генерированных датчиками (5) электрических сигналов в сигналы к шине, подготовленные для анализа данных в интерфейсе (6) шины. Технический результат изобретения заключается в возможности установки для подачи воздуха как управлять частотой вращения, так и обрабатывать сигналы диагностирования компрессора. 9 з.п. ф-лы, 2 ил.

ЭЛЕКТРОННОЕ УСТРОЙСТВО УПРАВЛЕНИЯ МОТОРОМ НАСОСА

Система управления предназначена для управления мотором насоса системы смазки. Система содержит подвод питания системы насоса, привод мотора, датчик тока, контроллер смазки и контроллер привода. Подвод питания системы насоса приспособлен подавать питание системы. Привод мотора приспособлен приводить в действие мотор насоса смазки с помощью питания системы. Датчик тока расположен между подводом питания системы насоса и приводом мотора, чтобы распознавать входной ток питания системы. Контроллер смазки приспособлен обеспечивать сигналы активации мотора. Контроллер привода расположен так, чтобы принимать сигналы активации мотора с помощью отдельного цифрового входа и управлять приводом мотора как функцией распознанного входного тока и определенной пользователем заданной величины тока в ответ на сигналы активации. Технический результат – расширение арсенала технических средств управления мотором насоса смазки. 2 н. и 13 з.п. ф-лы, 3 ил.

ПОЛУГЕРМЕТИЧНЫЙ КОМПРЕССОР ХОЛОДИЛЬНОГО АГЕНТА

Изобретение относится к полугерметичному компрессору холодильного агрегата. Полугерметичный компрессор холодильного агента содержит поршневой компрессор и электродвигатель. Общий корпус имеет двигательный участок корпуса для электродвигателя и компрессорный участок корпуса для поршневого компрессора. Чтобы ведущий от всасывающего патрубка в общем корпусе к впускной камере поршневого компрессора находящийся со стороны всасывания тракт холодильного агента и ведущий от выпускной камеры поршневого компрессора к напорному патрубку на общем корпусе, находящийся с напорной стороны тракт холодильного агента, работал более эффективно, предлагается, что электродвигатель выполнен в виде синхронного двигателя, в роторе которого расположены постоянные магниты для синхронного режима работы электродвигателя и короткозамкнутая клетка для запуска электродвигателя в асинхронном режиме работы. Постоянные магниты простираются параллельно оси ротора и выполнены в виде пластинчатых тел, плоские стороны которых ...

УСТАНОВКА ПОВЫШЕНИЯ ДАВЛЕНИЯ ВОДЫ И СПОСОБ ЕЕ УПРАВЛЕНИЯ

Раскрыта установка повышения давления воды, оснащенная контроллером, выполняющим алгоритм для определения оптимальных начальных параметров одного или нескольких насосов. Установка повышения давления воды обеспечивает подачу воды на участки при конкретных рабочих параметрах. Вода поступает во всасывающий коллектор, проходит по трубам и поступает в насосы. Насосы доводят воду до требуемого давления и/или расхода и выводят ее через трубы из нагнетательного коллектора. За одним или несколькими компонентами установки повышения давления воды во время эксплуатации ведется контроль, данные о параметрах отображаются локально и/или дистанционно. Аварийные сигналы, касающиеся одного или нескольких рабочих параметров, и условия возникновения аварийного сигнала могут отображаться локально и/или дистанционно. Пользователь может вносить изменения в установку локально и/или дистанционно посредством экрана и/или дистанционного устройства с помощью программы для смартфона. 3 н. и 12 з.п. ф-лы, 15 ил.

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА УПРАВЛЕНИЯ КОМПРЕССОРНОЙ СТАНЦИЕЙ

Изобретение относится к способу управления компрессорной станции. Способ управления компрессорной станцией (1), которая включает в себя по меньшей мере несколько объединенных друг с другом в сеть компрессоров (2), может не только формировать стратегии переключений посредством электронной системы (3) управления для оказания влияния на количество имеющейся в распоряжении одного или нескольких пользователей станции (1) сжатой текучей среды в станции (1), но и в состоянии приспосабливать имеющееся в распоряжении одного или нескольких пользователей станции (1) количество сжатой текучей среды к будущим условиям работы станции (1) адаптивно к отбираемому количеству сжатой текучей среды из станции. Перед запуском стратегии переключений разные стратегии переключений проверяют способом прогностического моделирования, взяв за основу модель станции (1), из проверенных стратегий переключений с помощью по меньшей мере одного установленного критерия качества выбирают относительно наиболее предпочтительную ...

УПРАВЛЕНИЕ СИСТЕМОЙ РАЗГРУЗКИ КОМПРЕССОРА

Изобретение относится к области компрессоростроения, в частности к системам изменения производительности компрессоров. Компрессор переменной производительности включает в себя корпус с входным и выходным отверстиями для приема хладагента и его возврата соответственно и множество сжимающих элементов, расположенных в корпусе между входным и выходным отверстиями. Включает также клапан с электрическим управлением, предназначенный для сжимающих элементов, выбранных из общего количества сжимающих элементов. Клапан выполнен с возможностью перемещения между первым состоянием, в котором он открыт для передачи потока хладагента к сжимающим элементам, и вторым состоянием, в котором он закрыт для уменьшения или прекращения протекания потока к сжимающим элементам. В одном из вариантов осуществления изобретения контроллер разгрузки имеет режим изменения работы компрессора, который включает в себя переключение клапана между включенным и выключенным состояниями для получения части производительности компрессора ...

СПОСОБ СОЗДАНИЯ ЗАДАННОГО УРОВНЯ ВАКУУМА В СИСТЕМЕ ДОЕНИЯ И КОМПЬЮТЕРНЫЕ ПРОГРАММНЫЕ ПРОДУКТЫ

... 1. Способ создания заданного уровня вакуума в системе доения, причем указанная система доения содержит, по меньшей мере, два вакуумных насоса (P1, P2) с регулируемой скоростью, отличающийся тем, что: ! используют первый вакуумный насос (Р1) с регулируемой скоростью для создания заданного уровня вакуума в указанной системе доения, ! контролируют потребность в уровне вакуума в системе доения, и когда потребность в уровне вакуума системы доения является такой, что скорость указанного первого вакуумного насоса (Р1) с регулируемой скоростью достигает первого предельного значения скорости, то ! запускают второй вакуумный насос (Р2) с регулируемой скоростью и ! используют указанные первый и второй вакуумные насосы (P1, P2) с регулируемой скоростью параллельно для создания заданного уровня вакуума. ! 2. Способ по п.1, отличающийся тем, что при запуске второго вакуумного насоса (Р2) с регулируемой скоростью увеличивают скорость указанного второго вакуумного насоса (Р2) с регулируемой скоростью и ...

УСТРОЙСТВО ДЛЯ ДЕТЕКТИРОВАНИЯ УГЛОВОГО ПОЛОЖЕНИЯ И ВОЗДУШНЫЙ КОНДИЦИОНЕР

... 1. Устройство для детектирования углового положения электродвигателя, имеющего индуктор, включающий в себя постоянный магнит, и якорь, включающий в себя катушки индуктивности трех или более фаз, причем упомянутый индуктор и упомянутый якорь вращаются относительно друг друга, содержащее:детектор, который определяет, равны ли первое линейное индуцированное напряжение и второе линейное индуцированное напряжение друг другу, причем упомянутое первое линейное индуцированное напряжение представляет собой разность потенциалов первого фазового потенциала из фазовых потенциалов, которые выдает упомянутый якорь в результате индуцированной электродвижущей силы, относительно опорного потенциала, а второе линейное индуцированное напряжение представляет собой разность потенциалов второго фазового потенциала из упомянутых фазовых потенциалов, отличных от упомянутого первого фазового потенциала, относительно упомянутого опорного потенциала, причем упомянутый опорный потенциал представляет собой любую из ...

КОМПРЕССОРНАЯ СИСТЕМА И СПОСОБ ФУНКЦИОНИРОВАНИЯ КОМПРЕССОРНОЙ СИСТЕМЫ В ЗАВИСИМОСТИ ОТ ФАКТИЧЕСКОЙ СИТУАЦИИ РЕЛЬСОВОГО ТРАНСПОРТНОГО СРЕДСТВА

Изобретение относится к области рельсовых транспортных средств. Компрессорная система включает в себя приводимый в действие от электродвигателя через приводной вал компрессор, резервуар для сжатого воздуха. Электродвигатель выполнен с возможностью настройки посредством регулировочного устройства, по меньшей мере, с одной частотой вращения, в пределах от максимальной частоты вращения до минимальной частоты вращения. В расположенном по ходу потока от компрессора, проводящем сжатый воздух трубопроводе расположен датчик давления для определения давления для регулировочного устройства. Исполнительный орган для непрерывного воздействия на частоту вращения электродвигателя расположен между устройством подачи электроэнергии и электродвигателем. Настройка исполнительного органа осуществляется в соответствии с сенсорным устройством, включающим в себя датчик для регистрации внешнего граничного условия рельсового транспортного средства, через регулировочное устройство. Достигается повышение эффективности ...

ХОЛОДИЛЬНЫЙ КОМПРЕССОР

Изобретение относится к холодильным компрессорам. В компрессорном блоке (12) с корпусом (22) компрессора расположен компрессорный элемент (24) для сжатия хладагента. В приводном блоке (14) с корпусом (26) привода расположен в корпусе (26) привода электродвигатель (32), а на корпусе (26) привода расположены присоединительные клеммы (42, 44, 46) для электродвигателя (32). Содержит электронный функциональный блок (92). Присоединительные клеммы (42, 44, 46) предусмотрены в расположенном на корпусе (26) привода корпусе (142), а в корпусе (142) предусмотрен электронный функциональный блок (92), выполняющий по меньшей мере одну компрессорную функцию и снабженный коммуникационным блоком (312) для обмена данными с внешними приборами (316). Техническим результатом является упрощение соединения холодильного компрессора с электронным функциональным блоком. 3 н. и 21 з.п. ф-лы, 4 ил.

ГИДРАВЛИЧЕСКАЯ СИСТЕМА, ПРИВОДЯЩАЯ В ДВИЖЕНИЕ НЕФТЯНОЙ СКВАЖИННЫЙ НАСОС

Изобретение относится к области добычи нефти с помощью скважинных нефтяных насосов. В гидравлической системе, приводящей в движение нефтяной скважинный насос, содержится двунаправленный поршневой насос переменного объема, участок обнаружения выпускной скорости, участок обнаружения выпускного давления и пропорциональный соленоидный управляющий клапан. Они выполнены в виде единой конструкции блока в той же обшивке, что и корпус насоса. Корпус насоса включает участок соединения, который выполнен на боковой поверхности обшивки и с которым соединен выпускной канал насоса внешнего пилотного гидравлического контура и второй пилотный канал, который подает внешнее пилотное давление от участка соединения пилотному каналу между выпускным каналом поршневого насоса и пропорциональным соленоидным управляющим клапаном. Также содержит средство, которое механически перекрывает подачу внешнего пилотного давления, когда выпускное давление поршневого насоса находится ниже заданного давления. В результате, ...

СИСТЕМА ОХЛАЖДЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, ТРАНСПОРТНОЕ СРЕДСТВО И СООТВЕТСТВУЮЩИЙ СПОСОБ

КОМПРЕССОРНАЯ СИСТЕМА И СПОСОБ ФУНКЦИОНИРОВАНИЯ КОМПРЕССОРНОЙ СИСТЕМЫ В ЗАВИСИМОСТИ ОТ ФАКТИЧЕСКОЙ СИТУАЦИИ РЕЛЬСОВОГО ТРАНСПОРТНОГО СРЕДСТВА

ГИБРИДНЫЙ СПОСОБ ПЕРЕМЕЩЕНИЯ ГРУЗА НЕФТЯНОГО ТАНКЕРА И СИСТЕМА ПРИВОДА ГРУЗОВОГО НАСОСА ДЛЯ ДАННОГО СПОСОБА

СПОСОБ ЭКСПЛУАТАЦИИ СИСТЕМЫ ПОДАЧИ ТЕКУЧЕЙ СРЕДЫ

СИСТЕМА ПРОВЕРКИ РАБОЧЕГО СОСТОЯНИЯ КЛАПАНА АЛЬТЕРНАТИВНОГО КОМПРЕССОРА И СПОСОБ ПРОВЕРКИ РАБОЧЕГО СОСТОЯНИЯ КЛАПАНА АЛЬТЕРНАТИВНОГО КОМПРЕССОРА

СПОСОБ И КОНТУР РЕГУЛИРОВАНИЯ ДЛЯ РЕГУЛИРОВАНИЯ ЭЛЕКТРИЧЕСКОГО ПРИВОДА ЭЛЕКТРИЧЕСКИ ПРИВОДИМОГО В ДЕЙСТВИЕ КОМПРЕССОРА СЖАТОГО ВОЗДУХА АВТОМОБИЛЯ

НЕПРЕРЫВНЫЙ КОНТРОЛЬ УРОВНЯ В РЕЗЕРВУАРЕ

УПРАВЛЕНИЕ ЭЛЕКТРИЧЕСКИМИ ДВИГАТЕЛЯМИ НАСОСНОЙ УСТАНОВКИ ПРОТИВОПОЖАРНОЙ СИСТЕМЫ

... 1. Способ управления электродвигателями насосной установки, входящей в состав противопожарной системы, которая содержит форсунки (112), насосную установку, систему управления со средствами измерения давления и трубопровод (105) для подачи к форсункам средства пожаротушения от насосной установки, содержащей приводы насоса, каждый из которых содержит насос (101) и вращающий его электродвигатель переменного тока (102, 203a-203f), выполненный с возможностью подключения к питающей сети переменного тока через контакторное устройство (206a-f), причем электродвигателем переменного тока в насосной установке управляют на основе измеряемого в трубопроводе давления, отличающийся тем, что одним из электродвигателей (102, 203a-203f) в конкретный момент времени управляют посредством частотного преобразователя (108, 204) таким образом, что указанный двигатель, подлежащий управлению частотным преобразователем, работает в качестве двигателя, который под управлением частотного преобразователя плавно регулирует ...

УСТРОЙСТВА, СИСТЕМЫ И СПОСОБЫ ПРЕДОСТАВЛЕНИЯ И ИСПОЛЬЗОВАНИЯ ОДНОГО ИЛИ БОЛЕЕ КЛАПАНОВ В КОНВЕЙЕРНОЙ ВЕГЕТАЦИОННОЙ УСТАНОВКЕ

BAKУУMHЫЙ HACOCHЫЙ AГPEГAT

Control system for a pump.

Control system for a pump

CONTROL IN A MOTOR DRIVEN MULTI-LEVEL ONE COMPRESSOR UNIT

HYDRAULIC SYSTEM FOR INJECTION MOULDING MACHINES

MECHANISM FOR THE CONTROL ELECTROMAGNETS INSBEONDERE TO THE ENTERPRISE OF PUMPS

IMPROVEMENTS FOR A LINEAR MOTOR PRICE INCREASE

PROCEDURE FOR THE CONTROLLING OF A CYCLICALLY KOMMUTIERTEN HYDRAULIC PUMP

PROCEDURE FOR THE CONTROLLING OF A CYCLICALLY KOMMUTIERTEN HYDRAULIC PUMP

EINRICHTUNG ZUR UEBERWACHUNG DES BETRIEBES EINER BLUTPUMPE

Elektromagnetischer Aktuator

Ein elektromagnetisch betätigbarer Aktuator (1) zur Anordnung an einem Kolbenkompressor (19), zur Betätigung eines Ventils, vorzugsweise eines Saugventils (21) des Kolbenkompressors (19), weist ein Aktuatorgehäuse (2) auf. Ein Magnetanker (4) wirkt mit einer Spule (3) elektromagnetisch zusammen, um den Magnetanker (4) zu bewegen, wobei der Magnetanker (4) mit einem Betätigungselement (5) zur Betätigung des Ventils verbunden ist. An einem axialen Aktuatorende (E) des Aktuatorgehäuses (2) ist eine Betätigungsöffnung (5a) für das Betätigungselement (5) vorgesehen. Eine den Aktuator (1) ansteuernde Leistungselektronik (6) ist durch eine Gehäusewandung (7) des Aktuatorgehäuses (2) von der Spule (3) getrennt. Eine Leiterplatte (8) der Leistungselektronik (6) ist an einer an der Gehäusewandung (7) vorgesehenen Befestigungsfläche (9) angeordnet, wobei sich elektrische Spulenkontakte (10) der Spule (3) durch die Gehäusewandung (7) hindurch erstrecken und mit der Leiterplatte (8) verbunden sind.

SIGNAL PROCESSING DEVICE FOR CONSTRUCTION MACHINES

DEVICE AND PROCEDURE FOR THE REGULATION OF PUMPS

Hydraulikantrieb für einen Druckübersetzer

Die Erfindung betrifft einen Hydraulikantrieb (1) für einen Druckübersetzer (2) einer Hochdruckeinrichtung, insbesondere für eine Anlage zum Wasserstrahlschneiden, bestehend im Wesentlichen aus einer Hydraulikpumpe (11), welche je Umdrehung ein konstantes Volumen an Arbeitsfluid (10) fördert, angetrieben von einem elektrischen Servoantrieb (12), wirkverbunden mit einer durch Messsignale regel- und/ oder schaltbaren elektrischen Versorgung. (15). Um einen Hydraulikantrieb (1) für einen Druckübersetzer (2) einer Fluid- Hochdruckeinrichtung zu schaffen, welcher geringe Druckschwankungen und Stöße im Hochdrucksystem verursacht und derart die Spitzen der Materialbelastungen verringert und höhere Sicherheit gewährleistet sowie die Anlagenkonzeption vereinfacht und wirtschaftliche Vorteile aufweist, ist erfindungsgemäß vorgesehen, dass der Servoantrieb (12) für die Hochdruckpumpe (11) bidirektional, also als reversibler Motor gebildet und derart eine Beaufschlagung des Druckübersetzers (2) mit ...

CONTROL DEVICE FOR ELECTRICAL COMPRESSOR

OIL PUMP CONTROL DEVICE FOR VEHICLE

Method and control circuit for controlling a pressure medium supply for a hydraulic actuator

Die Erfindung betrifft ein Verfahren zur Regelung einer Druckmittelzufuhr für mindestens einen hydraulischen Aktor (110) einer zyklisch arbeitenden Maschine, wobei der Aktor (110) von einer drehzahlvariablen Verstellpumpe (120), bei der ein in einem Verdrängervolumen je Arbeitsspiel verstellbares Förderwerk (122) von einem drehzahlvariablen Antrieb (121) angetrieben wird, mit einer Druckmittelmenge versorgt wird, wobei ein Ist-Volumenstrom auf einen Soll-Volumenstrom und/oder ein Ist-Förderdruck auf einen Soll-Förderdruck durch Vorgabe eines Drehzahlsollwerts (nSoll) und eines Sollwerts (αSoll) für eine das Verdrängervolumen je Arbeitsspiel bestimmende Kenngröße geregelt werden, wobei ein Sollwert (αSoll) für die das Verdrängervolumen je Arbeitsspiel bestimmende Kenngröße für wenigstens einen bestimmten Zeitpunkt während eines Zyklus der Maschine durch Variation des Sollwerts und Auswerten der elektrischen Leistung (Pi) des drehzahlvariablen Antriebs (121) für den wenigstens einen Zeitpunkt ...

DEVICE FOR THE AUTOMATIC ENTERPRISE OF KUENSTLICHER CYCLE PUMPS

HYDRAULIKANTRIEB FÜR EINEN DRUCKÜBERSETZER

The drive (1) has a pressure medium pump (10) comprising a constant displacement pump (11) i.e. internal gear pump, and conveying constant volume per revolution. A servo motor (12) i.e. frequency-regular drive motor, is coupled to drive the medium pump. A controller is structured to one of electrically control, regulate and switch the servo motor. The servo motor is arranged on one of a low pressure side (13) and a high pressure side (14) of a pressure booster (15). The controller receives signals from signal generators in a closed loop.

HYDRAULIKANTRIEB FÜR EINEN DRUCKÜBERSETZER

Hydraulic drive and method for driving a pressure booster of a high-pressure apparatus. The hydraulic drive includes a pressure medium pump having one of a constant displacement pump and a pump conveying a constant volume per revolution, a servo motor coupled to drive the pump, and a controller structured to at least one of electrically control, regulate and switch the servo motor, which is arranged on at least one of a low pressure side and a high pressure side of the pressure booster.

Hubkolbenkompressor mit Kapazitätsregelung

Ein getaktet schaltbares Absperrventil (2) zur Kapazitätsregelung über eine vorübergehendeAbschaltung der Sauggaszufuhr ist als mehrgliedriges Ringventil ausgeführt und mittels einesElektromagneten (12) direkt betätigt. Über einen Druckausgleich von der Sauggaszufuhr(3) bis hinter die Ankerplatte (9) können die Betätigungskräfte zur Umschaltung des Absperrventils(2) klein gehalten werden.

CONNECTING ARRANGEMENT WITH MEANS FOR LEAKAGE DETECTION

PROCEDURE AND DEVICE FOR DELIVERING A PRINTING MEDIA, WHICH IS PROMOTED OF OF A PUMP MECHANISM WITH CHANGING PRESSURE.

MULTI-TYPE AIR CONDITIONER SYSTEM WITH OIL CONTROL FOR PARALLEL OPERATED COMPRESSOR THEREIN

Fluid pump friction loss optimisation arrangement

Provided is a fluid pump friction loss optimisation arrangement for an electrical system 10 for operatively driving a pump 18 which includes fluid pump friction loss optimisation and related efficiency improvements. The system 10 generally comprises a prime mover 12 having a controllable mechanical output, and a synchronous three phase alternating current electrical generator 14 mechanically coupled to the prime mover output. The generator 14 operatively generates electrical power and has a controllable excitation system whereby the generator voltage output is controllable. When combined with a suitable controller 20, the prime mover 12, generator 14 and controller 20 typically form a generator assembly 34. 0 C) ce) cv C/) cc $ 0 441e 0- w I-- - - - - . . . . . . . . . . . . . 0 IL cr- I* co 0I I- I wI -J 0 wO 0I w w * z~ Ii I~ w zz -0 .0 IxI I I I '0I z z I c'.K Of__ 0 ___ 0______ ...

Peristaltic hose pump

Method of controlling a pump and motor

Hermetic compressor driving device

A hermetic compressor driving device, which drives a hermetic compressor (20) provided with an HPS (High Pressure Switch) (24) therein, includes parameter detection units (a voltage detection unit (12), an overcurrent detection unit (13), and a position and open-phase detection unit (16)) that detect an overcurrent, a bus voltage, and an open phase, which are generated during the opening operation of the HPS (24) within the hermetic compressor (20); a temperature detection unit (17) that detects the temperature of the hermetic compressor (20); and a control unit (14) to which data acquired by the parameter detection units and the temperature detection unit (17) is input. When detecting an abnormality on the basis of the data and upon determining the abnormality as a resumable abnormality, the control unit (14) outputs a drive signal; and, upon determining the abnormality as being not a resumable abnormality, outputs an abnormality signal. 0u - j 0- D: '-44 - - - - - - - - - *z m *0 I -- ...

Electronic pump motor control

A motor control system for a lubricant pump motor comprises a pump system power input, a motor drive, a current sensor, a lubrication controller, and a drive controller. The pump system power input is configured to supply system power. The motor drive is configured to drive the lubricant pump motor using the system power. The current sensor is disposed between the pump system power input and the motor drive to sense an input current of the system power. The lubrication controller configured to provide motor activation signals. The drive controller is disposed to receive the motor activation signals via an isolated digital input, and to control the motor drive as a function of the sensed input current and a user-defined current set-point, in response to the activation signals.

Pump using multi voltage electronics with run dry and over current protection

A pump system features a power adapter and a pump having a signal processor. The power adapter includes voltage settings that respond to a voltage setting by a user and provide a selected voltage. The signal processor receives signaling containing information about the selected voltage supplied to a motor to run the pump, and also containing information about whether a current draw of the pump is lower than a predetermined low current level or is higher than a predetermined high current level; and determines whether to shut off the pump after a predetermined time, based on the signaling received.

Method and apparatus for decompressing a compressor

Methods, computer readable media, and apparatus are disclosed for decompressing an air compressor. The methods including compressing air, the compressed air flowing through a first path through a first non-return valve to a first receiver; and in response to determining to take the air compressor off-load, closing an air inlet valve of the air compressor to stop air from entering the air compressor, opening a second path from the air outlet of the air compressor to approximately atmospheric pressure to lower the air pressure at the air inlet of the air compressor, stopping a first flow of oil from the first receiver to the air compressor, wherein the first flow of oil is for cooling the compressor, stopping a second flow of oil from a separator for a working air to the air compressor, and flowing oil from the first receiver to the air compressor for lubrication.

Negative pressure wound therapy apparatus

Some embodiments disclosed herein are directed to a pump assembly comprising a voice coil, a magnet and a diaphragm, wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil. Some embodiments disclosed herein are directed to an apparatus for applying negative pressure to a wound comprising a source of negative pressure configured to be coupled to a dressing, the source of negative comprising a voice coil actuator and a diaphragm, and a controller configured to produce a drive signal for the voice coil actuator.

Adaptive flow control

A system includes a fixed-displacement fluid pump, a motor operatively connected to the fixed-displacement fluid pump, a sensor configured to sense a parameter related to a drive speed of the motor, and a user interface. The pump controller is configured to receive an input from the user interface of a target flow rate of the pump, determine a duty cycle for the motor based on the target flow rate, and control the motor to operate according to the duty cycle. The pump controller is further configured to receive an indication of the sensed parameter related to the drive speed of the motor, determine a measured drive speed of the motor based on the sensed parameter, and iteratively adjust the duty cycle based on a difference between the measured drive speed of the motor and an expected drive speed of the motor.

Subsea multipiston pump module and subsea multistage pump

The present invention relates to a subsea multipiston pump module (1), a subsea multistage pump and skid, having two reciprocating pistons (10, 20) controlled by a control means in such a way that the pistons can be driven either in a parallel mode, where the pistons are driven in phase with each other, or in a serial mode, where the pistons are driven out of phase with each other, wherein the pistons are fluidly connected with each other by a piston connection means (31) in such a way that in parallel mode they are fluidly connected in parallel, and in serial mode, they are fluidly connected in serial. Further, the invention relates to a method of pumping a media fluid under subsea conditions.

Method for actuating valve and system for actuating valve for multi-suction alternative compressor

The present invention refers to a method for actuating semi-controlled valve that acts in synchronism with the compression cycles of an alternative compressor and to a system for actuating a multi-suction alternative compressor semi-controlled valve. Said method comprises at least a step of detecting at least one compression peak (1) in the course of at least one mechanical cycle (2) of the alternative compressor; and at least a step of switching the functional status of at least an alternative compressor semi-controlled valve (3) based on detecting at least one compression peak (1) in the course of at least one mechanical cycle (2) of the alternative compressor (5).

HYDRAULIC FLUID PRESSURE CONTROL

Abstract A hydraulic fluid pressure control system comprising: a hydraulic pump motor having an electrical input configured to receive an AC input signal and a hydraulic fluid 5 output configured to output a pressure proportional to the frequency of the AC input signal; and electronic control circuitry connected to said electrical input, wherein: said electronic control circuitry provides an AC input signal of variable frequency. The electronic control circuitry may comprise an inverter. i~. 7 \..10 Fig. 2 ...

Subterranean pump with pump cleaning mode

A method to dislodge debris from a pump system in which the pump system includes a down-hole pump coupled by a rod string to an above-ground pump actuator, which is coupled to a controller configured to operate the pump system, and where the actuator has an adjustable stroke length. The method also includes determining that the pump system should begin operating in a pump clean mode, implementing the pump clean mode configured in the controller, and cycling the pump actuator at a preset command speed using a preset starting stroke length, preset acceleration rate and a preset deceleration rate. The method also includes continuing to cycle the pump actuator while incrementally decreasing the stroke length by a preset stroke length increment resulting in increased pump cycling frequencies. Further, the method calls for determining that the pump clean mode is complete, and returning the pump system to a normal operation mode.

POWER TRANSMISSION

Identification and communication system for inflatable devices

ELECTRO HYDRAULIC CONTROL WITH DEAD ZONE COMPENSATION

CONTROL DEVICE, OIL WELL WITH DEVICE AND METHOD

A method of operating an oil well comprises applying through a regenerative variable frequency drive AC electrical energy from a power grid to an AC electric motor to operate a drive mechanism of an oil well pump. The motor speed is regulated in a manner to optimize fluid production and maximize the operational life of the drive mechanism, decreasing motor speed by transferring the electrical energy to the power grid and increasing motor speed by transferring the electrical energy from the power grid to the motor. The drive mechanism has a predetermined stroke cycle and, over the course of each stroke cycle, the motor is operated at different regulated speeds initiated when the drive mechanism is at a predetermined position.

PUMP CONTROL SYSTEM AND METHOD

A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibration procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can defect fault conditions, and can store fault conditions for later retrieval.

METHOD TO DELIVER REMAINING LIQUID IN AN ENTERAL OR OTHER INFUSION DEVICE

A waste-reducing pumping system and method for delivering a liquid to a patient according to a predetermined therapy protocol is characterized by a stored flush mode routine executable by a processor after an end-of-therapy stoppage of a pumping mechanism, whereby the pumping mechanism is operated to deliver residual liquid remaining in downstream tubing of an administration set to the patient to prevent the residual liquid from being wasted or manually administered at an unsafe rate.

DUAL PUMP CONTROL SYSTEMS

AUTOMOBILE AIR CONDITIONER PRELIMINARY LUBRICATION SYSTEM

OIL WELL PUMPOFF CONTROL SYSTEM UTILIZING INTEGRATION TIMER

OIL WELL PUMPOFF CONTROL SYSTEM UTILIZING INTEGRATION TIMER. A valve in the production flow line of an oil well closes a reed switch indicative of fluid being pumped through the line. The switch closure activates a first oscillator whose count is compared with a variable frequency oscillator having a frequency of approximately one-half that of the first oscillator. The comparison is made over a given period of time to ascertain the percentage of time the valve has been open and passing fluid. Theoretically, the valve should be open approximately fifty percent of the time because almost that much time is taken on the downstroke of the pumping assembly when no production is occurring. The integrated timer is adjusted to shut down the system when the percentage of time the valve is open drops to the preselected amount, usually equal to or less than around fifty percent. In response to the integration timer producing a signal, a shutdown timer is turned on which restarts the cycle after a preselected ...

SELF-CONTAINED FOUNTAIN ARRANGEMENT

LIQUID SENSOR FOR RECIPROCATING REFRIGERANT COMPRESSOR

PULSE GENERATOR

IN-LINE PUMPING APPARATUS, SYSTEM AND METHOD FOR INCREASING LIQUID FLOW IN GRAVITY NETWORKS

The invention, comprises a pumping apparatus, system and method for increasing the flow of the in a first direction to boost liquid flow and in a reverse second direction to remove blockages and/or self-clearing, with operation having an rotor /impeller that can use a shredder and/or shearing action utilizing blades for processing to pass solids, debris and other things to prevent clogging and/or self-cleaning of the unit.

MICROMETERING PUMP

The present invention discloses a metering pump, comprising: - a chamber having a proximal portion and a distal portion; - a piston accommodated in the chamber and being movable in the chamber; a drive for driving the piston reciprocally form a proximal dead center to a distal dead center in the chamber, wherein the distal dead center is located at the distal portion of the chamber and the proximal dead center is located at the proximal portion of the chamber; an outlet valve located at the distal portion of the chamber, wherein the outlet valve allows a flow of fluid from the chamber, if the piston is moved in the distal direction, and blocks a fluid flow into the chamber, if the piston is moved into the proximal direction, and - a seal located at the distal portion of the chamber, wherein the seal seals the chamber, if the piston is positioned at the distal dead center, and - an inlet valve, wherein the inlet valve allows a flow of fluid into the chamber, if the piston is moved in the ...

FLUID PUMP FOR GROUNDWATER WELLS WITH CYCLE COUNTER

The present disclosure relates to a cycle counter apparatus for use with an air-driven fluid pump. The apparatus may have a main housing having a bore in communication with a pressurized fluid signal being applied to remove a liquid from a location filling with the liquid. A magnet housing may be included which is moveable linearly within the bore of the main housing in response to the pressurized fluid signal entering the bore. A magnet may be secured to the magnet housing. A switch housing may be included which is operably associated with the main housing and which includes first and second longitudinally spaced apart sensing components. The sensing components are used to detect movement of the magnet in response to the pressurized fluid signal.

FUEL SUPPLY CONTROL DEVICE

This fuel supply control device (10) is a fuel supply control device that generates an operation amount for feedback control of the rotation of a gear pump (3) on the basis of a deviation of a detected fuel flow rate with respect to a target flow rate, wherein in order to protect a bearing of the gear pump, the operation amount is generated so that the rotary speed of the gear pump is at least a predetermined lower limit rotary speed Nmin.

SPLIT FLOW PUMPING SYSTEM CONFIGURATION

The present disclosure relates generally to well operations. The present disclosure relates more particularly to a systems and methods for independently and/or simultaneously treating multiple wells from a centralized location using a split flow pumping system configuration. The split flow pumping system configuration may comprise one or more blenders, one or more boost pumps, a pumping system comprising one or more pumps, a component storage system, and a fluid storage system for treatment of two or more wells using two or more treatment compositions. The split flow pumping system configuration may comprise one or more controllers for controlling the one or more blenders, the one or more boost pumps, the pumping system comprising one or more pumps, the component storage system, and the fluid storage system. The system may comprise one or more sensors for collecting data corresponding to the one or more pressures, flow rates, injection rates, compositions, temperatures, and densities of ...

METHOD AND SYSTEM FOR CONTROLLING MULTIPLE PUMP JACKS

A pump jack controller is provided that can harness the potential energy generated during the operation of one pump jack amongst a plurality of pump jacks located at a well site and convert that potential energy into electrical energy that can be used to provide electrical power generated by the pump jack to power the other pump jacks located at the well site.

HIGH QUALITY NON-AEROSOL HAND SANITIZING FOAM

Exemplary embodiments of high non-aerosol foam sanitizers are disclosed herein. An exemplary embodiment of high non-aerosol foam sanitizer includes a liquid mixture that includes an alcohol, water and a surfactant mixed with and entrapping air to form a plurality of foam bubbles. Wherein more than about 50 percent of the foam bubbles have a size of between about 50 µm and about 250 µm.

VARIABLE DISPLACEMENT AXIAL PISTON PUMP WITH FLUID CONTROLLED SWASH PLATE

A variable displacement axial piston pump including a cylinder block defining a plurality of cylinder bores, each receiving a piston. A swash plate having a piston-supporting surface is pivotally supported relative to the cylinder block. A port block defines first and second pumping ports arranged in fluid communication with the plurality of cylinder bores such that, during operation of the pump, one of the first and second pumping ports is configured to supply fluid to the cylinder bores for pumping, and the other of the first and second pumping ports is configured to receive fluid pumped from the plurality of cylinder bores. The swash plate partially defines at least one variable volume control chamber, and the swash plate is operable to tilt with respect to the port block in response to a fluid pressure change in the at least one control chamber.

PUMP INTEGRITY DETECTION, MONITORING AND ALARM GENERATION

An embodiment includes a method of monitoring a fluid pump that includes receiving time domain measurement data indicating vibrations occurring in a fluid pump, and filtering the measurement data to remove measurement data components having frequencies below a threshold frequency, the removed measurement data components associated with cyclical motions of the fluid pump. The method also includes dividing the filtered measurement data into a plurality of subsets, each subset corresponding to a pump cycle, and estimating a peak count for each subset, the peak count being a number of peaks having an amplitude that exceeds a selected amplitude threshold, the amplitude threshold associated with impacts between internal components of the pump. The method further includes comparing the peak count with an expected peak count, and determining whether the pump is in a condition selected from at least one of a wear condition and a failure condition based on the comparison.

METHOD FOR CONTROLLING THE COMPRESSION OF AN INCOMING FEED AIR STREAM TO A CRYOGENIC AIR SEPARATION PLANT

A method for controlling the compression of an incoming feed air stream to a cryogenic air separation plant using at least two variable speed compressor direct drive assemblies controlled in tandem is provided. The first variable speed direct driver assembly directly drives at least one compression stage in the lower pressure compressor unit while the second variable speed direct driver assembly directly drives higher pressure compression stage disposed in the common air compression train of the air separation plant. The first and second variable speed driver assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.

HYDRATION SYSTEM AND COMPONENTS THEREOF

A hydration system including a fluid reservoir, a fluid path in communication with the reservoir, and a magnetic quick connect interposed in the fluid path is disclosed. A fluid delivery system for a hydration system is also disclosed that includes a magnetic quick connect interposed in a fluid delivery path of the delivery system. The magnetic quick connect can also be used in a wide variety of fluid delivery systems. A kit for forming a fluid delivery system for a hydration system is also disclosed, as are various components of a hydration system.

LIQUID LEVEL SENSOR SYSTEM

A fluid level sensor system is disclosed for sensing a fluid level in a well. The system has a main body and an inlet housing coupled to the main body. The inlet housing has an internal chamber in communication with an ambient environment within the well. A bellows within the main body communicates with the internal chamber of the inlet housing. A movable element is responsive to movement of the bellows. A sensor detects when the movable element moves from a first position, indicating a first fluid level in the well, to a second position indicating a second fluid level within the well. An indicator is operably associated with the movable element and moves into a position to be viewable when the sensing element is moved to the second position, to provide a visual indication that the second fluid level has been reached.

COMPRESSED AIR ENERGY STORAGE GENERATOR

This CAES generator (1) is provided with multiple motors (13), multiple compressors (10), an accumulator tank (11), expanders (12), generators (15), inverters (14) for a motor which change the rotation speed of the motor, a power supply command receiving unit (31) which, before the supply of input power, receives the input power as a power supply command value, and a control device (30). The control device (30) comprises a compression unit number calculation unit (30a) which calculates the maximum number of motors (13) that can be driven at rating on the basis of the power supply command value, and a compression drive control unit (30b) which drives, at rating, the maximum number of motors (13) calculated by the compression unit number calculation unit (30a).

METHOD AND APPARATUS FOR CONTROLLING THE SPEED OF A PUMP IN A WELL

A method and apparatus for controlling a speed of a pump operating in a well. A first step involves monitoring a production flow rate of fluids produced from the well. A second step involves controlling the speed of the pump with reference to the production flow rate by increasing the speed of the pump when the production flow rate is rising and decreasing the speed of the pump when the production flow rate is declining.

INTEGRATED CONTROL SYSTEM FOR BEAM PUMP SYSTEMS

The present invention generally provides apparatus and methods of operating a pumping system. The pump control apparatus includes a first sensor for measuring strain on a structure of the well pumping system and a second sensor for measuring a position of the structure. The apparatus also has a controller configured to control the well unit by receiving output signals from the first and second sensors and generating control signals according to a motor control sequence. This controller may be mounted to the structure of the pumping system to measure the strain experienced by the structure. The control signals may be transmitted to a motor control panel using a cable-less communications system. Preferably, the first sensor, the second sensor, and the controller are integrated into a single unit. In another embodiment, the pump control apparatus may be self-powered.

WORK MACHINE, CONTROL SYSTEM AND METHOD FOR CONTROLLING AN ENGINE IN A WORK MACHINE

A method for controlling an engine in a work machine includes determining a base engine operating limit; determining a hydraulic system load on the engine; calculating a modification value for the base engine operating limit; generating a modified engine operating limit based on the modification value and the base engine operating limit; generating an engine control signal based on the modified engine operating limit; and transmitting the engine control signal to operate the engine at the modified engine operating limit to thereby supply additional power from the engine to the drive train to at least partially compensate for the hydraulic system load.

FLOW-RATE MONITORING SYSTEM FOR A PRESSURE PUMP

A flow-rate monitoring system may include a position sensor, a strain gauge, and a computing device for determining a rate of fluid flow through a pump using strain measurements. The strain gauge may determine strain in the chamber. The position sensor may determine the position of a crankshaft coupled to a plunger in the chamber. The computing device may receive signals generated by the strain gauge and the position sensor related to the strain in the chamber and the position of the crankshaft and process the signals to determine a flow rate through the chamber of the pump.

DYNAMIC ACTIVATION OF PUMPS OF A FLUID POWER SYSTEM

A method includes receiving pump cycle location data associated with a fluid power system. The fluid power system includes a plurality of pumps (including at least a first pump, a second pump, and a third pump). Based on the pump cycle location data having a first value, the method includes activating the first pump as a primary pump. Based on the pump cycle having a second value, the method includes activating the second pump as the primary pump. The method also includes activating the third pump as a secondary pump when the fluid power system is in a multiple-pump operating mode.

METHOD, SYSTEM AND APPARATUS FOR DISPENSING PRODUCTS FOR A PERSONAL CARE SERVICE, INSTRUCTING ON PROVIDING A PERSONAL CARE TREATMENT SERVICE, AND SELECTING A PERSONAL CARE SERVICE

A method, system and apparatus for delivery of custom blended dispensing custom blended personal care beauty products for a beauty service, wherein one or more components of a beauty product are stored where they may be supplied as needed to a dispenser, and where a control mechanism regulates the dosage of beauty components to provide a desired selected personal care beauty product with the characteristics selected. A selection screen display provides an image of a person and the person's hair that may be manipulated to simulate modifications that may include cut or styling and color or other effects. The selections are processed and stored and a formula is generated and communicating to a dispensing device to deliver the product components to produce the formula.

METHOD FOR DETERMINING A PHYSICAL VARIABLE IN A POSITIVE DISPLACEMENT PUMP

The present invention relates to a method for determining at least one physical variable in a positive displacement pump, wherein the positive displacement pump has a movable displacer element which delimits the metering chamber which is connected via valves to a suction and pressure line, with the result that delivery fluid can alternately be sucked into the metering chamber via the suction line and can be pressed out of the metering chamber via the pressure line as a result of an oscillating movement of the displacer element, wherein a drive is provided for the oscillating movement of the displacer element.

AUXILIARY PUMPING UNIT

A pumping unit for use with a hydraulic elevator system includes a reservoir storing fluid, a first pump, and a second pump. The first pump is coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is also coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is selectively actuatable when the first pump is inactivated.

METHOD AND APPARATUS FOR PUMPING FLUID

There is provided a method of transporting fluid produced from a fluid source having a source pressure to a fluid destination having a destination pressure rating. The method has the steps of determining a compressor power requirement based on the destination pressure rating and an estimated rate of flow. A compressor having a power rating that is less than the determined compressor power requirement is provided. An input of the compressor is connected to the fluid source and connecting an output of the compressor to the fluid destination. The compressor is operated in a high volume mode for a first portion of a compression stroke path and in a low volume move for a remainder of the compression stroke path such that the compressor simulates the output from a compressor with higher power rating.

CLUSTERED WELLHEAD TRUNKLINE PROTECTION AND TESTING SYSTEM WITH ESP SPEED CONTROLLER AND EMERGENCY ISOLATION VALVE

The systems and processes of the present invention includes ESP variable speed drive controllers that function in conjunction with a safety logic solver, pressure sensors, and an emergency isolation valve to perform a functional test of the complete wellhead trunkline protection system without interruption of production.

VARIABLE SPEED PROGRESSING CAVITY PUMP SYSTEM

A pump system including a pump and a sensor system for monitoring a fluid production of the pump and providing an output indicative of the fluid production. The sensor system is configured to use at least two discrete methodologies for measuring the fluid production. The pump system further includes a control system operatively coupled to the sensor system and the pump and configured to automatically vary the speed of the pump at least partially based upon the output of the sensor system.

SYSTEM AND METHOD PERTAINING TO A PERISTALTIC PUMP MECHANISM

A pumping mechanism is disclosed that includes a plurality of peristaltic pumping actuators configured to selectively and sequentially compress adjacent portions of a first portion of an at least partially compressible pumping element having an inlet that is upstream of an outlet. The plurality of pumping actuators to reciprocate at a common drive frequency with a first phase offset between each adjacent pair of pumping actuators. The pumping mechanism also includes at least one compensation actuator arranged to selectively compress a second portion of the at least partially compressible pumping element that is disposed between the first portion and the outlet. The at least one compensation actuator is configured to reciprocate at an optimal displacement and at a modulation frequency that is an integer multiple of the fundamental drive frequency and with a second phase offset between the at least one compensation actuator and the adjacent pumping actuator.

PUMP DEVICE AND CONTROL METHOD THEREFOR

... [Object] To provide a pump device capable of stabilizing a suction flow rate irrespective of an outside air temperature and a control method therefor. [Solving Means] The control method for a pump device includes: outputting a drive signal for driving a motor at a rotation speed for discharging gas of the reference flow rate from the suction port of the pump main body; measuring a temperature of gas discharged from the suction port or a temperature of the pump main body by a temperature sensor attached to the pump main body; calculating an actual flow rate of the gas discharged from the suction port based on a temperature signal relating to the temperature of the gas included in an output of the temperature sensor; and correcting the drive signal such that the actual flow rate equals the reference flow rate and outputting the corrected drive signal to the motor.

AIRCRAFT HYDRAULIC PUMP CONTROL SYSTEM

A control system for an aircraft's electrically driven hydraulic pump. An electronic motor controller having closed loop feedback is utilized to directly control the prime mover speed in response to pump loading.

MAGNETIC DIRECT DRIVE RECIPROCATING PUMP APPARATUS AND METHOD WITH INTEGRAL PRESSURE SENSING

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HYBRID MAGNETICALLY SUSPENDED AND ROTATED CENTRIFUGAL PUMPING APPARATUS AND METHOD

An apparatus and method for a centrifugal pump (10) for pumping sensitive biologic fluid, which includes (i) an integral impeller and rotor (21) which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings (52, 54) and rotated by an integral motor (40), (ii) a pump housing and arcuate passages (32, 34, 36) for fluid flow and containment, (iii) a brushless driving motor (40) embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf -- all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced ...

Electric compressor controller

An electric compressor controller includes a compressor that compresses refrigerant of an air conditioning system; a motor that drives the compressor; an inverter that selectively control switching elements based on PWM pulse signals to supply drive power to the motor and heats the refrigerant by heat generated due to switching of the switching elements during a heating operation; temperature detectors each detects junction temperature of each of the switching elements; a drive controller that supplies the pulse signals to the inverter to control the inverter; and a slope varying unit that variably controls precipitous degree of rising/falling slope waveforms of the pulse signals based on the junction temperature detected by the temperature detectors. According to the electric compressor controller, efficiency for heating refrigerant is improved, so that its own heating ability is improved.

Компрессор переменного давления

Полезная модель относится к области компрессоростроения, в частности к компрессорам переменного давления с регулируемой скоростью изменения давления в системе, применяемым, в частности в массажной и терапевтической медицинской технике. Компрессор переменного давления содержит насос, шаговый двигатель и блок управления шаговым двигателем. Технический результат заключается в стабилизации заданной частоты работы компрессора с сохранением высокого тягового усилия электропривода во всем частотном диапазоне работы компрессора. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 185 469 U1 (51) МПК A61H 23/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК A61H 23/00 (2018.08); F04B 49/06 (2018.08) (21)(22) Заявка: 2018118412, 18.05.2018 (24) Дата начала отсчета срока действия патента: 05.12.2018 Приоритет(ы): (22) Дата подачи заявки: 18.05.2018 (45) Опубликовано: 05.12.2018 Бюл. № 34 (54) КОМПРЕССОР ПЕРЕМЕННОГО ДАВЛЕНИЯ (57) Реферат: Полезная модель относится к области компрессоростроения, в частности к компрессорам переменного давления с регулируемой скоростью изменения давления в системе, применяемым, в частности в массажной и терапевтической медицинской технике. Компрессор переменного давления содержит R U 1 8 5 4 6 9 (56) Список документов, цитированных в отчете о поиске: CN 202707446 U, 30.01.2013. US Стр.: 1 5501650 A, 08.09.1993. EP 1241355 B1, 06.06.2007. RU 112626 U1, 20.01.2012. EA 26979 B1, 30.06.2017. U 1 U 1 Адрес для переписки: 249039, Калужская обл., г. Обнинск, а/я 9004, Чабань Ю.М. 1 8 5 4 6 9 (73) Патентообладатель(и): ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ НАУЧНО-ПРОИЗВОДСТВЕННАЯ КОМПАНИЯ "ИННОВАЦИОННОЕ МЕДИЦИНСКОЕ ОБОРУДОВАНИЕ" (RU) Дата регистрации: R U 18.05.2018 (72) Автор(ы): Бутов Олег Владиславович (RU), Лопунов Алексей Иванович (RU) насос, шаговый двигатель и блок управления шаговым двигателем. Технический результат заключается в стабилизации заданной частоты работы компрессора с сохранением ...

Product delivery and monitoring system

A product delivery and monitoring system is provided. The system includes at least one air pump, an air pump sensor for each air pump, at least one diaphragm pump, a diaphragm pump sensor for each diaphragm pump, a controller and an indication system. Each air pump sensor is configured and arranged to monitor the operation of the air pump. The at least one diaphragm pump is configured and arranged to deliver a product in response to the operation of an associated air pump. Each diaphragm pump sensor is configured and arranged to monitor the delivery of the product by the diaphragm pump. The controller is in communication with each air pump sensor and each diaphragm pump sensor. The controller is configured to generate at least one control signal based on a comparison of communications from an air pump sensor and an associated diaphragm sensor. The controller is configured to manipulate the indication system with the at least one control signal.

Fluid working machine and method of operating a fluid working machine

A fluid working machine comprises a working chamber of cyclically varying volume, a high pressure manifold, and an actuated high pressure valve for regulating the flow of fluid between the working chamber and the high pressure manifold. The actuated high pressure valve comprises a moveable valve member, operable between a closed position and at least one open position. A controllable opening mechanism provides an active urging force to urge the moveable valve member from the said closed position towards at least one said open position, the volume of the working chamber varying between a maximum volume and a minimum volume. The controllable opening mechanism provides the active urging force more than once while the volume of the working chamber is intermediate the maximum of chamber volume and the minimum of chamber volume.

Control Algorithm of Variable Speed Pumping System

A pumping system includes a pump for moving water. In one aspect, this is in connection with performance of an operation. The system includes a variable speed motor operatively connected to drive the pump. A value indicative of flow rate of water is determined and the motor is controlled to adjust the flow rate indicative value toward a constant. A value indicative of flow pressure is determined and the motor is controlled to adjust the flow pressure indicative value toward a constant. A selection is made between flow rate control and flow pressure control. In another aspect, the pump is controlled to perform a first operation, and is operated to perform a second water operation. Control of operation of the pump to perform the first water operation is altered in response to operation of the pump to perform the second operation.

Pump motor control assembly

A pump motor assembly operable to provide driving power to a fluid pump includes a rotor, a stator, a case housing the rotor and the stator, and a control assembly mounted to the case and operable to control motor operation. The control assembly includes an information display and a cover overlying the display, with a window section in general alignment with the display. The control assembly also includes a filler plate underlying the window section to prevent any air gap along an underside thereof, allowing the display to be visible while reducing the risk of condensation buildup. The control assembly further includes a low voltage housing with the display disposed in a first compartment defined thereby, and a high voltage housing with a high voltage component disposed in a second compartment defined thereby. The low voltage housing includes a thermal and fluid barrier that substantially fluidly separates the first and second compartments to reduce the risk of liquid electrical conduction therebetween and to reduce heat transfer into the low voltage housing.

Refrigeration Cycle

Provided is a refrigeration cycle suitable for an air conditioning system for vehicles, wherein a flow rate of refrigerant which is used to estimate a torque of a compressor can be precisely estimated by accurately detecting a difference between pressures at upstream and downstream sides of an orifice having a high correlation with the refrigerant flow rate, and ultimately, the torque of the compressor can be precisely estimated, and the estimation can be achieved while achieving space saving and cost down. Disclosed is a refrigeration cycle which has a subcool condenser integrally provided with a condensing part for refrigerant, a liquid receiver and a subcooling part, and wherein an orifice for throttling the flow of refrigerant which has passed through the condensing part of the subcool condenser is disposed, a pressure difference detection means capable of detecting a difference between pressures at upstream and downstream sides of the orifice is provided, and provided are a refrigerant flow rate estimation means for estimating a flow rate of the refrigerant with reference to the detected pressure difference and a compressor torque estimation means for estimating a torque of the compressor with reference to the estimated flow rate of the refrigerant.

Pump Control and Method

A pump control ( 20 ) and method are provided for controlling a pump ( 16 ) for a pressurized liquid supply system ( 10 ). The pump control ( 20 ) includes a controller ( 38 ) configured to provide at least two selectable modes of pump operation as follows: a flow start mode wherein the controller ( 38 ) starts the pump ( 16 ) in response to a desired start flow rate of the liquid in the system ( 10 ) and stops the pump ( 16 ) in response to a desired stopping low flow rate of the liquid in the system; and a pressure start mode wherein the controller ( 38 ) starts the pump ( 16 ) in response to a desired start pressure of the liquid in the system ( 10 ) and stops the pump ( 16 ) in response to the desired stopping low flow rate.

Compressor overload protection device

A compressor overload protection device utilizes a first electrode of an electric connector to electrically connect a first OLP overload protection loop that is electrically connected to a first power line of an external power source. In addition, a second OLP overload protection loop is connected to a second electrode and a third electrode of the electric connector, and a capacitor is electrically connected between the third electrode and the first electrode. When the operation of the compressor is overloaded, the first and second OLP overload protection loop can provide proper protection mechanism with respect to the first power line and the second power line to prevent a motor of the compressor from being overheated and damaged, and the electrodes of the electric connector can be effectively prevented from exploding.

Direct metering fuel system with constant servo flow

A direct metering fuel supply system includes a fuel pump, a burn flow fuel line, a servo flow fuel line, and a servo regulator. The fuel pump is adapted receive pump commands representative of a commanded fuel flow rate and is configured, in response to the pump commands, to discharge fuel at the commanded fuel flow rate. The burn flow fuel line is in fluid communication with the pump to receive a first portion of the fuel discharged therefrom. The servo flow fuel line is in fluid communication with the pump to receive a second portion of the fuel discharged therefrom. The servo regulator is mounted on the servo flow fuel line and configured to maintain fuel flow rate in the servo flow fuel line at a substantially constant fuel flow rate regardless of fuel flow rate in the burn flow fuel line.

Method for Establishing Cavitation in Hydrostatic Devices and Control Device

A method for detecting cavitation in a hydrostatic system includes capturing an oscillation typical for the cavitation from a pressure captured over time. Furthermore, the method includes establishing an evaluation variable for cavitation on the basis of the captured oscillation. Additionally, the method includes comparing the evaluation variable to a comparison value.

Air conditioning apparatus

Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor integrally including a compressor, an electric motor that drives the compressor, and an inverter including a temperature sensor that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller estimates a discharge temperature of the compressor on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter, for the rotational speed of the compressor, and for the motive force of the compressor in a refrigerating cycle.

Pump system and method for operating the same

Provided is a pump system. The pump system includes an AC (alternating current) electric motor, a converter, a smoothing unit, an inverter, a volt/hertz pulse width-modulation controller, and a main controller. The AC electric motor operates a pump which is a load. The converter receives AC power and converts the AC power into DC (direct current) power. The smoothing unit smoothes a DC voltage converted by the converter. The inverter converts the DC voltage output from the smoothing unit into an AC voltage. The volt/hertz pulse width-modulation controller applies switching voltage to a semiconductor switching device of the inverter. The main controller changes an operating frequency according to a load detected when the Ac electric motor is in operation and puts the AC electric motor to a sleep mode after determining a load operation status.

Method, apparatus, and computer-readable storage medium for controlling torque load of multiple variable displacement hydraulic pumps

Methods, apparatuses, and computer program products for controlling the torque load of multiple variable displacement hydraulic pumps are described herein. A pump displacement limit for each variable displacement hydraulic pump is determined using a nonlinear control law to limit the total pump torque load of the variable displacement hydraulic pumps on the engine. The value of the actual pump displacement of each variable displacement hydraulic pump is controlled based upon the respective determined pump displacement limit.

Apparatus Using Electronically-Controlled Valves

The pumps and pressure controllers described herein aim to pump fluid in two directions, such as from a first port to a second port and vice versa. The pressure controllers aim to control pressure in a system or device, such as a test device, accurately and precisely at a variety of different pressure levels. Generally described, the pumps and pressure controllers described herein may include two or more control valves, which may be actuatable in such a manner so that the pump or pressure controller can switch between operating as a vacuum pump and operating as a compressor. In some embodiments, the pressure controllers may be able to adjust a pressure in the device by small increments thereby providing increased control of the pressure in the device over the prior art. Furthermore, the pressure controllers may be able to control the pressure of a system having low pressure levels.

Pump controller

The present invention provides a technique using current sensing to control the pressure at constant level without the direct sensing of the pressure. This technique will help to reduce dependency solely on switch or sensor and their non linearity and other associated problems such as the non-repetitive behavior, being affected by EMI etc. The technique includes using a pump controller featuring one or more modules configured to respond to one or more input signals containing information about current provided from a pump; and configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure. The one or more modules control the operation of the pump based at least partly on a table of characteristics related to voltage and current that is calibrated for each pump.

Gas boosters

One or more examples of the gas boosters described herein aim to provide a light weight gas booster configured to produce high output pressure levels at high volumes. Generally described, one or more examples of the gas boosters reduce the dead volume in a piston assembly, thereby increasing the ratio of the output pressure to the input pressure. In that regard, several examples of the gas boosters disclosed herein have a first check valve as a disk-type check valve or the like and a second check valve as a ball-type check valve or the like. Furthermore, one or more examples include an inwardly acting cam configured to convert rotary motion to reciprocating motion by an inner surface thereof.

Linear compressor

The present invention relates to a linear compressor which can perform the natural cooling capacity modulation, even if a capacitor connected to a motor is removed. The linear compressor includes a fixed member having a compression space therein, a movable member linearly reciprocated in the fixed member to compress a refrigerant sucked into the compression space, one or more springs provided to elastically support the movable member in the motion direction of the movable member, a motor connected to the movable member to linearly reciprocate the movable member in the axial direction, and a motor control unit performing the cooling capacity modulation by the reciprocation of the movable member according to a load, by controlling an AC voltage applied to the motor so that a stroke of the movable member can be proportional to the magnitude of the AC voltage applied to the motor.

System and method for driving a pump

A system for driving a pump includes a gas turbine engine having an output shaft, and a torque converter including an input shaft coupled to the output shaft of the gas turbine engine and an output shaft configured to be coupled to an input shaft of a pump. The system further includes a controller coupled to the torque converter, wherein the controller is configured to receive a signal indicative of a pressure at at least one of a pump inlet and a pump outlet, and control a speed of the output shaft of the torque converter based on the signal indicative of pressure.

Liquid feed pump and circulation pump

A pump chamber is connected to an outlet-side buffer chamber via an outlet channel, and pumps a liquid from the outlet-side buffer chamber. A pressure vibration generated within the pump chamber when the volume of the pump chamber is decreased includes various kinds of information relating to the operating states of the liquid feed pump, such as mixing of bubbles, pumping pressure, dissolved gas amount, and liquid feed amount. Thus, it is possible to detect the pressure vibration, thereby simply and easily detecting the various kinds of information relating to the operating states of the liquid feed pump.

Hydraulic transport device and electrohydraulic control module

A hydraulic transport device for transporting a hydraulic medium. The device includes at least one externally toothed gear pump that is driven by an electric motor, and a control device attached to the pump. A passive rotational speed detection element is arranged in the pump and interacts with an active rotational speed detection element that is arranged in the control device to detect the rotational speed of the pump shaft.

Altitude-dependent compressor control

A method for controlling an electrically driven compressor, which can be switched on and off as a function of demand, of a pneumatic suspension system, wherein the temperature of the compressor is calculated according to a temperature model inside a control device, and the compressor is switched on or off as a function of the calculated temperature, wherein, for the calculation of the temperature of the compressor according to the temperature model, the control device takes into account the air pressure surrounding the vehicle as an input variable, and the parameters of the temperature model are adapted as a function of this air pressure.

Method for Controlling and/or Regulating a Metering Pump

The present invention concerns a method of controlling and/or regulating a metering pump comprising a drive motor having a shaft driven by the motor and a displacement member arranged in a metering head, in which the rotary movement of the shaft is converted into an oscillating movement of the displacement member, wherein the displacement member, interacting with an outlet and inlet valve in alternate sequence, leads to a pump stroke (pressure stroke) and an intake stroke and thus to delivery of a medium to be metered. To provide a method of controlling and/or regulating a metering pump, which in principle manages without a position sensor on the thrust rod and can establish the metering behaviour of the pump with a high degree of precision, according to the invention it is proposed that at least one motor operating parameter, preferably a motor voltage U or a motor current I, is measured, at least one regulating parameter is calculated from the measured motor operating parameters and optionally further known motor characteristics, the at least one regulating parameter is compared to a predetermined guide parameter, and a comparison signal dependent on the result of the comparison is outputted, and can be used as a status, actuating and/or regulating signal. 1. A method of controlling and/or regulating a metering pump comprising a drive motor having a shaft driven by the motor and a displacement member arranged in a metering head , in which the rotary movement of the shaft is converted into an oscillating movement of the displacement member , wherein the displacement member , interacting with an outlet and inlet valve in alternate sequence , leads to a pump stroke (pressure stroke) and an intake stroke and thus to delivery of a medium to be metered ,characterised in thatat least one motor operating parameter, preferably a motor voltage U or a motor current I, is measured,at least one regulating parameter is calculated from the measured motor operating parameters and ...

Method and controller for operating a pump system

A method and controller for operating pumps wherein each pump is modelled by a QH model indicating a high-efficiency region, a high-H region and a high-Q region and a rotational speed limit. A controller dynamically maintains a current set of operating pumps and controls their rotational speed (n). In steady-state operation, wherein the pumps operate in the high-efficiency region and below the rotational speed limit, all pumps of the current set are controlled together. If the pumps operate in the high-Q region or beyond the speed limit, a new pump is added to the current set, started and brought to a speed that produces flow. A balancing operation ( 12 - 3 ) follows the pump addition operation, wherein the speed of the pumps of the current set are adjusted for equal heads. If the pumps operate in the high-H region, a pump is removed from the current set of pumps.

Calculating Downhole Pump Card With Iterations on Single Damping Factor

A pump apparatus has a downhole pump disposed in a wellbore and has a motor at the surface, and a rod string operatively moved by the motor reciprocates the downhole pump in the wellbore. Downhole data indicative of load and position of the downhole pump is generated using surface measurements and a wave equation model having a damping factor. Actual fluid load lines are determined from the downhole data for upstrokes and downstrokes of the downhole pump, and calculated fluid load lines for from the strokes are determined from the distribution of the load values in the downhole data. The actual fluid load lines are compared to the calculated fluid load lines to determine if the downhole data is over or under-damped. Then, the damping factor of the wave equation model can be adjusted so that new downhole data can be generated with appropriate damping. 1. A method implemented by a processing device of diagnosing a pump apparatus having a downhole pump disposed in a wellbore and having motor at a surface of the wellbore , the downhole pump reciprocated in the wellbore by a rod string operatively moved by the motor , the method comprising:generating a downhole card indicative of downhole load and downhole position of the downhole pump by using surface measurements and a wave equation model having a damping factor;determining an actual fluid load line for each of an upstroke and a downstroke of the downhole pump from the downhole card;determining a calculated fluid load line for each of the upstroke and the downstroke of the downhole pump from load values distributed on the downhole card;comparing the actual fluid load lines to the calculated fluid load lines;adjusting the damping factor of the wave equation model based on the comparison; andgenerating another downhole card based on the adjusted damping factor.2. The method of claim 1 , comprising initially obtaining the surface measurements indicative of surface load and surface position of the rod string at the surface ...

HYDRAULIC POWER SYSTEM

A hydraulic power system comprises a hydraulic pump coupled to a brushless motor. The brushless motor may comprise stators having a plurality of windings and at least one outrunning rotor having a plurality of magnetic poles and optionally coupled to a drive shaft via flexible couplings which may be coaxial with the drive shaft and rotor. 1. A hydraulic power system comprising at least one hydraulic pump coupled to at least one brushless motor , wherein said brushless motor comprises:at least one stator having a plurality of windings; andat least one outrunning rotor having a plurality of magnetic pole;said rotor being configured to rotate around said stator thereby transmitting torque to said hydraulic pump via a drive shaft.2. The system of claim 1 , wherein said rotor is coupled to said drive shaft via at least one flexible coupling.3. The system of claim 2 , wherein said flexible coupling is coaxial with said drive shaft and said rotor.4. The system of further comprising a fluid reservoir.5. The system of further comprising a protective sleeve configured to encompass said fluid reservoir.6. The system of further comprising a pump housing.7. The system of further comprising a motor housing.8. The system of claim 6 , further comprising a motor housing claim 6 , wherein said pump housing is contiguous with the motor housing.9. The system of claim 1 , wherein said rotor comprises m magnetic poles claim 1 , said stator comprises n windings and m magnetic sensors configured to sense said magnetic poles claim 1 , and m and n equal eighteen.10. (canceled)11. (canceled)12. The system of claim 1 , wherein said hydraulic pump is selected from a group consisting of: gear pumps claim 1 , gerotor pumps claim 1 , rotary vane pumps claim 1 , screw pumps claim 1 , bent axis pumps claim 1 , axial piston pumps swashplate principle claim 1 , radial piston pumps claim 1 , and peristaltic pumps.13. The system of claim 1 , wherein said hydraulic pump comprises an inlet and outlet.14. ...

Variable Speed High Efficiency Gas Compressor System

A system for powering a compressor. The system may include a power generation unit adapted to generate AC power. An electric motor may be coupled to the power generation unit and adapted to turn at a rate proportionate to a frequency of the AC power. A compressor may be coupled to the electric motor, and an output pressure of the compressor may be directly dependent on the rate that the electric motor turns. A control system may be coupled to the power generation unit and to the compressor, and the control system may be adapted to vary the frequency of the AC power generated by the power generation unit, thereby varying the output pressure of the compressor. 1. A system for powering a compressor , comprising:a power generation unit adapted to generate AC power;an electric motor coupled to the power generation unit, the electric motor adapted to turn at a rate proportionate to a frequency of the generated AC power;a compressor coupled to the electric motor, an output pressure of the compressor being directly dependent on the rate that the electric motor turns; anda control system coupled to the power generation unit and to the compressor, the control system being adapted to vary the frequency of the AC power generated by the power generation unit, thereby varying the output pressure of the compressor.2. The system of claim 1 , wherein the power generation unit further comprises:an engine adapted to run at variable speeds; andan electric generator coupled to the engine and adapted to generate the AC power, the frequency of the AC power being directly dependent on the speed of the engine.3. The system of claim 1 , wherein the power generation unit comprises a plurality of power generation units claim 1 , and wherein the control system is adapted to regulate each power generation unit independently to match a power demand of the electric motor.4. The system of claim 1 , further comprising a busbar claim 1 , wherein the power generation unit and the electric motor are ...

Precision pump with multiple heads

A pump for one or more different process fluids is provided including a pumping chamber having a process fluid inlet and outlet coupled to a process fluid valve on each pumping chamber for selectively preventing and allowing flow of process fluid through the pumping chamber. An actuation mechanism for pumping actuating fluid to actuating fluid chambers is provided that is in communication with the actuating fluid chambers to permit flow into each actuating fluid chamber of incompressible actuating fluid. A diaphragm separates each pumping chamber from an associated actuating fluid chamber for separating process fluid from actuating fluid. The actuation mechanism is removable by a quick disconnect that provides for disconnection of the activation mechanism without affecting process fluid. Operation of the actuation mechanism to displace actuating fluid causes actuating fluid to flow only into each actuating fluid chamber having an opened process fluid valve, resulting in pumping.

Apparatus and method for controlling a compressor, and refrigerator comprising same

The present invention relates to an apparatus for controlling a compressor, to a method for controlling a compressor and to a refrigerator comprising same. According to certain embodiments of the present invention, a compressor operates selectively in a TRIAC driving mode or in a mode in which commercial power is directly used in accordance with the quality of the electricity of the commercial power. According to certain embodiments of the present invention, the commercial power is directly applied to the compressor within the range of a predetermined voltage or frequency so as to reduce or remove losses caused by the TRIAC driving, and power consumption is reduced to improve energy efficiency.

Compressor protection and diagnostic system

A compressor diagnostic device is provided and includes at least one of a temperature sensor and a current sensor. The current sensor measures a first current flow through a motor of a refrigerant compressor. The temperature sensor is disposed within and sensing a temperature of a measurement region of an electrical conductor that is configured to close and open to allow and prevent current flow to the motor, respectively. The compressor diagnostic device also includes a controller in communication with the at least one of the current sensor and the temperature sensor. The controller is operable to control the electrical conductor based on a comparison of a second current flow through the motor and a maximum current.

Cryopump system, cryogenic system, and apparatus and method of controlling compressor unit

A compressor controller includes: a control amount calculation unit configured to calculate at least two control amounts including a first control amount for controlling a first control object that relates to a gas amount for cooling a cryogenic apparatus, and a second control amount for controlling a second control object that relates to the refrigerant gas amount and that is different from the first control object, the second control amount being common with the first control amount; and a selection unit configured to select a control object to be controlled from at least two control objects including the first control object and the second control object on the basis of a comparison between the at least two common control amounts.

ULTRA HIGH PRESSURE PUMP

An ultra high pressure pump comprising a servo motor coupled to a piston having a head arranged within a cylinder to define a pumping chamber, whereby the servo motor rotation causes reciprocal displacement of the piston to pressurise fluid in the pumping chamber to pressures greater than 50,000 psi, the servo motor having a feedback loop coupled to a computer, the feedback loop including a pressure feedback signal to control the pump pressure in real time. 1. An ultra high pressure pump comprising a servo motor coupled to a piston having a head arranged within a cylinder to define a pumping chamber , whereby the servo motor rotation causes reciprocal displacement of the piston to pressurise fluid in the pumping chamber to pressures greater than 50 ,000 psi , the servo motor having a feedback loop coupled to a computer , the feedback loop including a pressure feedback signal to control the pump pressure in real time.2. The ultra high pressure pump according to claim 1 , wherein the servo motor includes an encoder to monitor the position and/or velocity of the motor.3. The ultra high pressure pump according to claim 1 , including means to monitor the current flowing through the motor.4. The ultra high pressure pump according to wherein the outlet of the pumping chamber is coupled to a pressure transducer that provides the pressure feedback signal.5. The ultra high pressure pump according to wherein the output of the servo motor is a reciprocating drive means having opposed ends claim 1 , each end being coupled to a piston cylinder defining a pumping chamber.6. An ultra high pressure pump comprising a servo motor adapted to axially rotate a hollow rotor shaft in alternating directions claim 1 , the servo motor having a stator positioned co-axially around the hollow rotor shaft with the interior of the rotor shaft being co-axially coupled to drive means to convert axial rotation into reciprocal displacement claim 1 , the drive means having opposed ends claim 1 , each ...

ELECTRIC PUMP SYSTEM

In an electric pump system, hydraulic fluid that is stored in an oil pan is supplied to a transmission mechanism through an oil passage by driving an oil pump with the use of a motor. An EOPECU estimates a hydraulic pressure of the hydraulic fluid on the basis of a driving current for the motor and a rotation speed of the motor, and executes drive control on the motor on the basis of the estimated hydraulic pressure value. 1. An electric pump system , comprising:an oil pump that supplies hydraulic fluid to a hydraulically-actuated device through an oil passage as a motor is driven; anda control unit that executes drive control on the motor based on a hydraulic pressure of the hydraulic fluid in the oil passage, whereinthe control unit estimates a hydraulic pressure value of the hydraulic fluid based on a driving current for the motor and a rotation speed of the motor.2. The electric pump system according to claim 1 , wherein the control unit corrects the estimated hydraulic pressure value based on a power supply voltage of the motor.3. The electric pump system according to claim 1 , wherein the control unit corrects the estimated hydraulic pressure value based on a fluid temperature of the hydraulic fluid.4. The electric pump system according to claim 2 , wherein the control unit corrects the estimated hydraulic pressure value based on a fluid temperature of the hydraulic fluid.5. The electric pump system according to claim 3 , wherein the estimated hydraulic pressure value is corrected for each of a plurality of fluid temperature ranges defined in advance.6. The electric pump system according to claim 4 , wherein the estimated hydraulic pressure value is corrected for each of a plurality of fluid temperature ranges defined in advance.7. The electric pump system according to claim 5 , wherein the estimated hydraulic pressure value is corrected by multiplying the estimated hydraulic pressure value by one of fluid temperature correction gains that are set for the ...

Electro-hydraulic drive system for a work machine

An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.

TORQUE ALLOCATING SYSTEM FOR A VARIABLE DISPLACEMENT HYDRAULIC SYSTEM

Disclosed is a system for allocating torque, supplied in one embodiment by an engine, to multiple variable and fixed displacement pumps coupled together in a series by coupling elements interspersed between the pumps. A controller is included which monitors the torque applied to each coupling element. The controller automatically varies displacement in one or more of the variable displacement pumps to prioritize and allocate torque to optimize available torque while keeping the torque applied to each coupling element within the torque limit for that particular coupling element. 1. A system for allocating torque from an engine power output on a primary mover , comprising:a first variable displacement pump operable to drive a first ground effect element;a first coupling between the engine power output of a primary mover and the first variable displacement pump;a second variable displacement pump operable to drive a second ground effect element;a second coupling between the first variable displacement pump and the second variable displacement pump;a variable displacement accessory pump coupled to the second variable displacement pump and operable to power a tool implement;wherein each coupling has a torque load rating;wherein the total torque load applied to the second coupling is the sum of the torque load applied by the accessory pump and second variable displacement pump; and wherein the total torque load applied to the first coupling is the sum of the torque load applied by the accessory pump, the second variable displacement pump and the first variable displacement pump;a controller monitoring the torque loads applied to the first coupling and the second coupling;wherein the controller applies control logic to reduce the displacement of one or more of the variable displacement pumps when the torque load of the first or second coupling elements approaches that coupling element's torque load rating.2. The system of claim 1 , wherein the controller monitors the ...

System for controlling a resonant linear compressor piston, method for controlling a resonant linear compressor piston, and resonant linear compressor

A system and a control method for the piston of a resonant linear compressor ( 100 ), especially designed for operating at their maximum efficiency, such a system being capable of actuating said compressor without the use of sensors for measuring mechanical magnitudes or variables. A method of controlling the piston of a resonant linear compressor, the steps of which enable one to estimate the velocity and the displacement of said piston, in order to control the compressor motor efficiently. A resonant linear compressor ( 100 ) provided with a control system as proposed.

APPARATUS AND METHOD FOR CONTROLLING COMPRESSOR, AND REFRIGERATOR HAVING THE SAME

A compressor control apparatus and method, and a refrigerator including the same, are provided. In a refrigerator having two compressors, starting of two compressors may be staggered to reduce an effect of the suction pressure and discharge pressure between the two compressors, to provide for stable operation of the compressors, and improve reliability and power consumption. 1. A compressor control apparatus for controlling a first compressor and a second compressor connected to each other to compress refrigerant in two stages , the apparatus comprising:a controller configured to generate a first control signal and a second control signal based on a load of the first compressor and the second compressor to operate the first compressor and the second compressor, wherein the controller is configured to first start the second compressor, and to start the first compressor after a predetermined period of time has elapsed after starting the second compressor in a simultaneous operation mode in which the first and second compressors are operated together.2. The apparatus of claim 1 , wherein the controller is configured to detect a top dead center of the second compressor after starting the second compressor claim 1 , and to start the first compressor after detecting the top dead center of the second compressor.3. The apparatus of claim 2 , further comprising:a first load detector and a second load detector configured to detect a load of the first and second compressors, respectively.4. The apparatus of claim 3 , wherein the first load detector comprises:a first current detector configured to detect a first motor drive current applied to a first motor provided in the first compressor;a first voltage detector configured to detect a first motor drive voltage applied to the first motor; anda first stroke calculator configured to calculate a first stroke of the first compressor using the first motor drive current and the first motor drive voltage, and wherein the second load ...

Apparatus and method for controlling a compressor

An apparatus and method for controlling a compressor are provided. An input voltage of a commercial power source, a motor voltage of a compressor motor, and a motor current of the compressor motor are detected, based on which voltage values of a capacitor and voltage values of a triac may be calculated. Thus, an additional operational amplifier or a sensor to measure a capacitor voltage is not required, reducing costs.

Feed water pump control device

The presence or absence of boost pressure is determined from an error between F-P characteristics showing the relationship between the output frequency of an inverter and the power consumption and an actual operating point. When there is boost pressure, an amount of correction of linearized characteristics showing the relationship between quantity and discharge side pressure is automatically calculated based on the error, and the linearized characteristics are corrected. Subsequently, by carrying out a PID control in accordance with a target pressure obtained from post-correction linearized characteristics, the output frequency of an inverter unit is controlled, and an estimated constant end pressure control is carried out. Because of this, a pressure sensor or quantity sensor on a pump intake side is rendered unnecessary, and a simplification and reduction in cost of a feed water pump control device are possible.

Apparatus for Controlling Electric Pump

In an apparatus for controlling an electric pump supplying operating oil to a driving system or the like of a vehicle, control satisfying both responsiveness and reduction in power consumption is performed even in a case in which an oil temperature sensor and a pump characteristic are abnormal. After starting of the electric pump, feedback control is performed in which a rotation number Nm of a driving motor is settled in a target rotation number Na set to satisfy predetermined performance. After satisfying a predetermined condition in which the motor rotation number Nm is in a stable state, motor current Im is settled in an indicated current Ip within a range of being equal to or less than a current limit value IL while the motor rotation number Nm is maintained equal to or greater than a required rotation number Np corresponding to the indicated current Ip. 1. An apparatus for controlling an electric pump supplying operating oil , comprising:a reference pump characteristic setting unit that sets a reference pump characteristic which is relationship between required current and a required rotation number of a motor for driving the electric pump required to obtain predetermined pump performance in accordance with a temperature of the operating oil;an indicated current setting unit that sets the required current as indicated current based on the reference pump characteristic in accordance with a detected temperature of the operating oil; anda control unit that controls a motor rotation number with a rotation number securing pump performance equal to or greater than the predetermined pump performance as a target rotation number in an initial stage of pump starting and, when the motor rotation number is greater than the required rotation number corresponding to the indicated current after settlement in a predetermined state by the motor rotation number control, settles motor current in the indicated current within a range in which the motor rotation number is ...

Air Compressor With Shut-Off Mechanism

A compressor system is disclosed, comprising a first pump driven by a D/C motor, a second pump driven by an A/C motor, and a switch which allows a user to manually selectively engage of one of the D/C motor or A/C motor, including a gauge having a user settable shut-off mechanism which interrupts power to at least one of D/C or A/C motors. Also disclosed is a gauge configured to display system pressure independent of the user settable shut-off mechanism. A gauge having a rotatable bezel with a needle stop comprising a first needle rotatably coupled to a gauge shaft, and a second needle fixable coupled to the gauge shaft, and a spring disposed between the first and second needles, the spring configured to bias the first needle into the second needle so changes in pressure causes rotation of both is also disclosed.

Method and system for reciprocating compressor starting

Systems and methods of the invention may overcome a higher than normal starting torque for in a reciprocating, electric motor driven air compressor for a vehicle. A detection component can be configured to detect a stall condition for a reciprocating compressor based on a force from compressed air being compressed into a reservoir of the reciprocating compressor. Based upon the detected stall condition, a controller can reverse direction or increase torque to alleviate the stall condition. In the reverse direction mode, the controller component can change a direction of a piston rotation. In the torque increase mode, the controller increases a number of poles for the motor, a line voltage, or a volt/hertz.

TRANSMISSION FLUID EXCHANGE MACHINE

A machine for replacing used transmission fluid in a vehicle with new transmission fluid includes a frame having a housing. The machine includes a pair of service hoses that extend from the machine and connect to the vehicle's transmission fluid system for placing the machine in the fluid flow. A new fluid tank and a used fluid tank are provided. A pump and a manifold are associated with each of the tanks. The pumps provide for the selective withdraw or insertion of fluid into or out of the tanks. A display on the housing presents an operator of the machine with various tasks or options the machine can perform. A processor controls activation of the pumps and other electrical components based on inputs received by the display. Scales are provided under each tank for determining the amount of fluid going into and out of the tanks during the exchange process. 1. A transmission fluid exchange machine comprising:a frame having a housing;a display coupled with the housing;a new fluid manifold and a used fluid manifold, both manifolds coupled with the housing and in fluid communication with each other;a new fluid pump and a used fluid pump, the new fluid pump coupled with the new fluid manifold and the used fluid pump coupled with the used fluid manifold; anda processor coupled with the display for displaying images thereon and selectively controlling activation of the pumps.2. The machine of claim 1 , wherein the new fluid manifold has a plurality of pathways therethrough claim 1 , wherein the pathways include a plurality of balls therein for controlling the direction of flow of fluid through the pathways claim 1 , and wherein a direction of rotation of the new fluid pump determines positioning of at least one of the balls.3. The machine of claim 1 , further comprising:a used fluid tank for holding used transmission fluid, the used fluid tank supported by the frame, wherein the used fluid pump is in communication with the used fluid tank and is operable to selectively ...

FLUID SUPPLY DEVICE

A fuel supply device according to the present invention comprises a first fuel pump for forcing fuel from a fuel tank to a fuel passage, a first electric motor for driving the first fuel pump, a second fuel pump for forcing fuel from the fuel tank to the fuel passage, a second electric motor for driving the second fuel pump, a supply flow rate sensor for detecting flow rate in the supply passage, and a control device for controlling the flow rate in the supply passage to follow a desired value thereof, by regulating rotational speeds of the first and second electric motors depending on a difference between the desired value and a detected value of flow rate in the supply passage. 1. A fluid supply device , comprising:a first constant displacement pump for forcing fluid from a fluid reservoir to a supply passage,a first electric motor for driving the first constant displacement pump,a second constant displacement pump for forcing fluid from the reservoir to the supply passage,a second electric motor for driving the second constant displacement pump,a flow rate detection device for detecting flow rate in the supply passage, anda control device for controlling the flow rate in the supply passage to follow a desired value thereof, by regulating rotational speeds of the first and second electric motors depending on a difference between the desired value and a detected value of flow rate in the supply passage.2. The fluid supply device according to claim 1 , whereinthe flow rate detection device includes a first pump flow rate sensor for detecting the flow rate at which the first constant displacement pump delivers fluid, a second pump flow rate sensor for detecting the flow rate at which the second constant displacement pump delivers fluid, and an adder for summing values of flow rate detected by the first and second pump flow rate sensors.3. A fluid supply device claim 1 , comprising:a first constant displacement pump for forcing fluid from a fluid reservoir to a first ...

SYSTEM AND METHOD FOR A COMPRESSOR

Systems and methods of the invention relate to diagnosing a compressor. A method may include operating a compressor to compress air from a first stage compressor into an intermediate stage reservoir, to deliver air from the intermediate stage reservoir to a second stage compressor, and to further compress the air in the second stage compressor into a primary reservoir, monitoring an intermediate stage pressure of the intermediate stage reservoir, and identifying a condition of the compressor through recognition of a change in the monitored intermediate stage pressure during a time period in which the compressor is operated. A vehicle system is also provided including an engine, a compressor operatively connected to the engine, and a controller that is operable to identify a condition of the compressor. 1. A method for a compressor system , comprising:operating the compressor system to compress air from a first stage compressor into an intermediate stage reservoir, to deliver air from the intermediate stage reservoir to a second stage compressor, and to further compress the air in the second stage compressor into a primary reservoir;monitoring an intermediate stage pressure of the intermediate stage reservoir; andidentifying a condition of the compressor system through recognition of a change in the monitored intermediate stage pressure during a time period in which the compressor system is operated.2. The method of claim 1 , further comprising filling the primary reservoir with compressed air to a determined pressure value claim 1 , wherein the primary reservoir is configured to store compressed air to be provided to at least one pneumatic device.3. The method of claim 1 , wherein identifying the condition of the compressor system further comprises correlating the monitored intermediate stage pressure and an indication of a position of a piston in a cylinder of the compressor system.4. The method of claim 3 , further comprising identifying a condition of the ...

Pump unit

A pumping set includes an electric motor, which exhibits a stator, a rotor and a can arranged between the stator and rotor, and at least one impeller linked with the rotor, wherein the electric motor has engine electronics designed for electronically commutating the electric motor, and the electric motor and commutation are configured in such a way that, in a state where the rotor chamber inside the can and/or the impeller is not filled with liquid, the rotor is shut down.

Compact, Light Weight, Battery Operated, Self-Priming, Positive Displacement Pump

Compact, lightweight, battery operated, self-priming, positive displacement pump for storing in a toolbox or tool belt includes an elongated housing having a longitudinal axis, and an inline configuration including a positive displacement pump assembly to respond to a motor assembly drive torque, self-prime, and pump fluid from an input port to an output port, a motor assembly to respond to signaling and provide the motor assembly drive torque, a pump control interconnect assembly to provide the signaling to control the operation of the motor assembly by current based on run dry mode or over current, by time based on a timer set to run for an amount of time, or voltage based on over/under voltage; and a rechargeable battery housing/assembly to respond to recharging signaling and with a rechargeable DC power supply and power control module for providing some combination of inrush, overcharging, over-discharging, short circuit, over current protection.

Apparatus and Method for Controlling Reciprocating Pump

A controlling apparatus for reducing the variation of the liquid supply of a reciprocating pump is presented. The controlling apparatus for a reciprocating pump has a pump housing; a moving component for reciprocating in the pump housing so as to draw a liquid into the pump housing and discharge the liquid from the pump housing; a driving source for reciprocating the moving component; a setting unit for setting a target liquid supply amount or a target amount which corresponds thereto; a unit amount memory unit for storing a discharge amount of the reciprocating pump per a reciprocal movement of the moving component or a unit amount which is a value corresponding to the discharge amount; a computation unit for computing the smallest multiple number of the unit amount which is equal to or larger than the target amount; and a motor controller for controlling the driving source. 1. A controlling apparatus for a reciprocating pump having: a pump housing; a moving component for reciprocating in the pump housing so as to draw a liquid into the pump housing and discharge the liquid from the pump housing; and a driving source for reciprocating the moving component , comprising:a setting unit for setting a target liquid supply amount or a target amount which corresponds thereto;a unit amount memory unit for storing a discharge amount of the reciprocating pump per a reciprocal movement of the moving component or a unit amount which is a value corresponding to the discharge amount;a computation unit for computing a smallest multiple number of the unit amount which is equal to or larger than the target liquid supply amount or the target amount; anda motor controller for controlling the driving source so as to reciprocate the moving component a same number of times as the smallest multiple number.2. The controlling apparatus for a reciprocating pump according to claim 1 , further comprising a home position return unit for returning a predetermined position of the plunger every ...

PUMP UNIT

A pumping set includes an electrical drive motor and electronic controller, wherein the controller is divided into two functional modules arranged on at least two separate circuit boards, of which a first functional module represents a supply part, which provides the input voltage for the second functional module, and wherein the second functional module exhibits engine electronics that are connected with stator coils of the drive motor to supply the latter with current. 117.-. (canceled)18162216222224. A pumping set comprising an electric drive motor and an electronic controller , wherein the controller is divided into two functional modules ( , ) arranged on at least two separate circuit boards , of which a first functional module () represents a supply part that provides an input voltage for the second functional module () , and wherein the second functional module () has engine electronics that are connected with stator coils () of the drive motor to supply the drive motor with current.191622. The pumping set according to claim 18 , wherein the supply part of the first functional module () provides an extra-low voltage as the input voltage for the second functional module ().2024. The pumping set according to claim 18 , wherein the engine electronics are designed to supply the stator coils () with extra-low voltage.2116223032. The pumping set according to claim 18 , wherein the first () and second () functional modules are connected to each other by an electrical plug-in connector ( claim 18 , ).2216. The pumping set according to claim 18 , wherein the first functional module () includes a transformer or switching power supply.23163422. The pumping set according to claim 18 , wherein the first functional module () includes at least one setting element () claim 18 , configured to set a speed of the drive motor claim 18 , and/or a sensor element claim 18 , which are signal-connected with the second functional module ().2422. The pumping set according to claim 18 , ...

DIAGNOSTIC SYSTEMS AND INSTRUMENTS

Provided is a clinical diagnostic system that comprises a diagnostic instrument and a disposable cartridge. The diagnostic system can be used to measure assays in point of care clinical settings. 1. A diagnostic system having a closed fluidic pathway comprising:a diagnostic instrument comprising at least two probes; a fluidic pathway; a non-electrochemiluminescence (ECL) detection system; an ECL detection system; and a pump;a cartridge comprising at least one needle, at least one reservoir; at least one fluidic seal; and at least one fluidic channel; anda blood collection tube,the closed fluidic pathway, wherein the pathway begins and ends in the cartridge and has a substantially single direction of flow in a pathway fluidically connecting the diagnostic instrument and the cartridge.2. The diagnostic system of claim 1 , wherein the at least one probe comprises a first probe and a waste probe claim 1 , and wherein the closed fluidic pathway includes a first probe engagement with the cartridge and a waste probe engagement with the cartridge.3. The diagnostic system of claim 1 , wherein the at least one reservoir comprises a first reservoir and a waste reservoir.4. The diagnostic system of claim 3 , wherein the first reservoir and the waste reservoir are the same reservoir.5. The diagnostic system of claim 3 , wherein the first reservoir and the waste reservoir are not the same reservoir.6. The diagnostic system of claim 3 , wherein after the first reservoir is emptied claim 3 , the first reservoir is used as the waste reservoir.7. The diagnostic system of claim 3 , wherein after the first reservoir is emptied it becomes the waste reservoir.8. The diagnostic system of claim 2 , wherein the first probe fluidically connects to a first reservoir of the disposable cartridge.9. The diagnostic system of claim 8 , wherein the first reservoir contains diagnostic reagents.10. The diagnostic system of claim 2 , wherein the waste probe fluidically connects to a waste reservoir of ...

Compressed Air Maintenance Unit and Consumer Control Device Equipped with the Same

A compressed air conditioning apparatus ( 2 ) and a load control device ( 1 ) equipped therewith are proposed, the compressed air conditioning apparatus ( 2 ) comprising a switch-on valve ( 14 ) with 3/3-valve functionality. By means of the switch-on valve ( 14 ), an outlet passage ( 22 ) leading to a load device (A) can, among other aspects, be optionally supplied with compressed air or disconnected from the compressed air supply. By means of a pressure sensor ( 24 ) and/or a flow sensor ( 25 ), actual pressure and/or flow data can be recorded and compared to reference data previously stored in a teaching mode. As a function of the comparison result, an electric diagnostic signal can be generated, offering, among other aspects, the opportunity for monitoring leakage from the load device (A) or excessive air consumption.

Variable fluid flow techniques for machine fluid systems

Methods, systems, and techniques for structuring, operating, and/or controlling a variable fluid flow system of a machine are provided. In various embodiments, a supplemental pump and/or an electric motor can be leveraged in combination with the existing components of a machine, such as the main fluid pump of the machine.

NEGATIVE PRESSURE WOUND THERAPY APPARATUS

Some embodiments disclosed herein are directed to a pump assembly comprising a voice coil, a magnet and a diaphragm, wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil. Some embodiments disclosed herein are directed to an apparatus for applying negative pressure to a wound comprising a source of negative pressure configured to be coupled to a dressing, the source of negative comprising a voice coil actuator and a diaphragm, and a controller configured to produce a drive signal for the voice coil actuator. 1. A pump assembly apparatus , comprising:a voice coil;a magnet; anda diaphragm; 'the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil.', 'wherein2. The apparatus of claim 1 , wherein the drive signal comprises an offset square wave drive signal.3. The apparatus of claim 1 , wherein the drive signal comprises an offset sinusoidal wave drive signal4. An apparatus for applying negative pressure to a wound claim 1 , comprising:a source of negative pressure configured to be coupled to a dressing, the source of negative comprising a voice coil actuator and a diaphragm; anda controller configured to produce a drive signal for the voice coil actuator.5. The apparatus of claim 4 , wherein the drive signal comprises an offset square wave drive signal.6. The apparatus of claim 4 , wherein the drive signal comprises an offset sinusoidal wave drive signal.7. The apparatus of claim 4 , further comprising a filter configured to filter the drive signal claim 4 , wherein the drive signal comprises a first pulse-width modulation drive signal and a second pulse-width modulation drive signal claim 4 , the first and second pulse-width modulation drive signals having different magnitudes.8. The apparatus of claim 7 , wherein:the filter is further configured to filter the first pulse- ...

Pump motor control assembly

A pump motor assembly operable to provide driving power to a fluid pump includes a rotor, a stator, a case housing the rotor and the stator, and a control assembly mounted to the case and operable to control motor operation. The control assembly includes an information display and a cover overlying the display, with a window section in general alignment with the display. The control assembly also includes a filler plate underlying the window section to prevent any air gap along an underside thereof, allowing the display to be visible while reducing the risk of condensation buildup. The control assembly further includes a low voltage housing with the display disposed in a first compartment defined thereby, and a high voltage housing with a high voltage component disposed in a second compartment defined thereby. The low voltage housing includes a thermal and fluid barrier that substantially fluidly separates the first and second compartments to reduce the risk of liquid electrical conduction therebetween and to reduce heat transfer into the low voltage housing.

Methods and Systems for Monitoring a Power Supply for a Fire Pump Motor

Methods and systems for operating a fire pump controller are provided. An example method includes causing a power supply coupled to a an electric motor-driven water pump through a fire pump controller in a fire protection system to provide power to the water pump, and monitoring the performance of the power supply during the motor starting period by measuring the voltage and/or current of its output under motor load conditions. The method may also include providing visual indications, such as traces or starting signatures of motor power supply voltages and/or currents during the motor starting period for the purposes of observation and troubleshooting motor power supply and power train performance problems. 1. A method comprising:causing a power supply coupled to an electric motor-driven water pump in a fire protection system to provide power to the water pump;measuring a voltage and/or current of the motor power supply output;providing, by a computing device, a visual indication, such as a trace of motor power supply voltage and/or current output during a motor starting period.2. The method of claim 1 , wherein causing the power supply coupled to the water pump in the fire protection system to provide power to the water pump comprises causing the power supply to begin operation.3. The method of claim 1 , wherein measuring the voltage and/or current of the motor power supply output comprises measuring the voltage and/or current of the motor power supply output during a starting period of the power supply.4. The method of claim 1 , wherein providing the visual indication claim 1 , such as a trace of motor power supply voltage and/or current output comprises providing an indication of whether a voltage provided by the power supply is less than about 15 percent of a nominal operating voltage under starting conditions.5. The method of claim 1 , further comprising providing the visual indication claim 1 , such as a trace of motor power supply voltage and/or current ...

Process control apparatus & method

A control device, a control method and system for controlling switching in/out of execution device in a system having plurality of execution devices in parallel, are disclosed. A group of execution devices perform predetermined operations on an execution object. The control device comprises feedback unit configured to provide the difference between reference quantity and feedback quantity; and at least one control unit corresponding to each execution device of the group of execution devices respectively, which is configured to provide a target value to a driver of a corresponding execution device using a control mode based on the difference, and when any of the other execution devices are switched in/out, provide a target value to the driver using another control mode. The driver drives the corresponding execution device based on the target value. The impact to the execution object may be suppressed and/or the adjustment time may be shortened.

Calibration of a Chemical Dispense System

In one implementation, a method for providing a fluid at a target pressure may include providing a fluid at a velocity to a supply line through a dispenser, measuring a pressure of the fluid flowing through the supply line, comparing the measured pressure with the target pressure, and adjusting the velocity based on the results of the comparison.

METERING SYSTEM

A metering system for metering a liquid has an electric motor () for setting a desired feed rate by modifying the rotation speed of the electric motor. It furthermore has an eccentric drive (), drivable by said electric motor (), for a pump () that has two delivery directions. It also has a pump ring () made of an elastomeric material and a stationary ring () which is arranged relative to the pump ring () and to the eccentric drive () in such a way that a pump chamber (), extending in a circumferential direction, is formed between the stationary ring () and pump ring (), which chamber changes shape upon rotation of the electric motor () in order to deliver a liquid to be metered through the pump chamber (). A stationary seal () is provided in the pump chamber (), between two fluid ports. 130. A metering system for metering a liquid , which metering system () comprises:{'b': '32', 'an electric motor () for establishing a desired liquid feeding rate by modifying a rotation speed of the electric motor;'}{'b': 52', '56', '32', '53, 'an eccentric drive (, ), drivable by said electric motor (), for a pump () that has two delivery directions;'}{'b': '70', 'a stationary ring ();'}{'b': '62', 'a pump ring () made of an elastomeric material,'}{'b': 62', '70, 'which pump ring () is nonrotatable relative to the stationary ring ();'}{'b': 70', '62', '52', '56', '120', '74', '53', '70', '62', '32', '120', '142', '120', '124', '122', '122', '124, 'the stationary ring () being arranged, relative to the pump ring () and to the eccentric drive (, ), in such a way that a pump chamber () extending in a circumferential direction, viewed in a section extending perpendicular to the rotation axis () of the pump (), is formed between the stationary ring () and pump ring (), which chamber changes shape upon rotation of the electric motor () in order to deliver the liquid to be metered through the pump chamber (), a stationary seal () being provided in said pump chamber () between a suction ...

STRAIN GAUGE PUMP CONTROL SWITCH

A control switch incorporates a solid state transducer, a strain gauge. The transducer responds to a local environmental condition, such as fluid level, or pressure and exhibits a parameter change which can be detected as an electrical output. Control circuits coupled to the transducer can sense the parameter change and switch a source of electrical energy to a load in response thereto. 121-. (canceled)22. A control system for an electric motor comprising:a watertight housing;a strain gauge carried in the housing;a vent tube with first and second ends, one end is coupled to the housing and the other end extends away from the housing;control circuits coupled to the strain gauge;a relay and an electronic switch coupled to and independently controllable by the control circuits;an electrical connector for a motor, the other end of the vent tube is located adjacent to the electrical connector as is an output from the relay and the electronic switch with the control circuits sequentially placing the switch into a conducting state and then changing a state of the relay.23. A system as in where the switch and the relay provide an electrical conducting path to the connector.24. A system as in where the control circuits sequentially place the switch into a conducting state and then change the state of the relay to provide the electrical conducing path to the connector in response to at least one electrical signal from the strain gauge.25. A system as in which includes a bridge circuit claim 22 , at least one branch of the bridge circuit is coupled to the bridge circuit.26. A system as in where the control circuits include a programmable processor and associated control software stored on a computer readable medium.27. A system as in which includes first software that monitors at least one electrical signal from the strain gauge.28. A system as in which includes second software claim 27 , responsive to at least one electrical signal from the strain gauge that carries out a ...

Strain gauge pump control switch

A control switch incorporates a solid state transducer, a strain gauge. The transducer responds to a local environmental condition, such as fluid level, or pressure and exhibits a parameter change which can be detected as an electrical output. Control circuits coupled to the transducer can sense the parameter change and switch a source of electrical energy to a load in response thereto.

CONTROLLER FOR CONTROLLING A FREQUENCY INVERTER AND CONTROL METHOD

A controller for controlling a frequency inverter of a positive displacement pump motor of a positive displacement pump. The controller comprises a control unit configured to produce a control variable (Ys) for a frequency inverter of a positive displacement pump motor depending on a reference variable (W) and a first actual operating parameter (X). According to the invention, the control unit is associated with logical means having a first threshold value defining means that are designed to determine at least one first threshold value (YGrenzmax, YGrenzmin) depending on the first actual operating parameter (X) and/or at least one further actual operating parameter (XH, YH, YHH) that could lead to a failure state of the positive displacement pump when exceeded or fallen short of. 121-. (canceled)22. A controller for controlling a frequency converter of a positive displacement pump motor of a positive displacement pump , comprising:a regulator configured to generate a manipulated variable (YS) for the frequency converter as a function of a reference input variable (W) and a first actual operating parameter (X) comprising the delivery fluid pressure, wherein logic means are assigned to the regulator,a first limit value specifying unit configured to determine at least one first limit value (Ylimit max, Ylimit min) as a function of the first actual operating parameter (X), and at least one additional actual operating parameter (XH, YH, YHH) comprising the delivery fluid viscosity, such that when the result exceeds the limit values the result is determined to be a defect state of the positive displacement pump,first comparator means configured to determine the manipulated variable (YS) or a corrected manipulated variable (Y′S, Y″S) or to compare a comparative value determined according to a functional relationship from the manipulated variable (YS) or the corrected manipulated variable (Y′S, Y″S) with the at least one first limit value (Ylimit max, Ylimit min),first ...

FIRE PUMP SYSTEM AND SYSTEM CONTROLLER

A fire suppression and control system includes a unique fire pump controller which uses advanced technologies in a manner consistent with the need for high reliability in the fire protection industry. A preferred controller includes three PIC chips including a control PIC for controlling operation of the water pump, a power monitor PIC for receiving all voltage and current inputs to the controller, and a data recorder PIC for collection and storage of data relevant to the system. The controller may also include an electronically coupled HMI which queries the controller for information to display, wherein the HMI does not pass information between components of the controller and is capable of being damaged without stopping or preventing operation of the controller, and an isolation scheme for isolating the controller from incoming energy transients, such as lightning, the isolation scheme comprising a relay and opto-isolators to drive the relay and increase the isolation by a factor of at least two over the relay alone. 1. A fire system for a structure , the system comprising:a water source;a water pump coupled to the water source;a water delivery construction, including sprinkler heads, for distributing water from the source to areas of a structure; [ i. a control PIC for controlling operation of the water pump;', 'ii. a power monitor PIC for receiving all voltage and current inputs to the controller; and', 'iii. a data recorder PIC for collection and storage of data relevant to the system, wherein only the control PIC is critical to controller operation;, 'a. three Programmable Interface Controller chips including, 'b. an electronically coupled HMI which queries the controller for information to display, wherein the HMI does not pass information between components of the controller and is capable of being damaged without stopping or preventing operation of the controller; and', 'c. an isolation scheme for isolating the controller from incoming energy transients, ...

PUMP SYSTEM

The invention relates to a pump system comprising a positive-displacement pump module, preferably a screw pump, a drive module which can be exchanged separately from the positive-displacement pump module, said drive module comprises an electric drive motor and a frequency converter associated therewith for controlling or adjusting a drive motor speed, control means comprising a controller for producing an adjustment variable (Y) for the frequency converter in accordance with a reference variable (W) and a first actual operational parameter (X) and logistic means associated with the controller, and reference variable defining means for providing the reference variable (W) for the control means. According to the invention, the control means are provided in a control module separately from the drive module, and the drive module can be exchanged separately from the control module, and the drive module does not have a designed and/or controlled controller for producing the adjustment variable (Y). 121-. (canceled)22. A positive displacement pump system , comprising:a positive displacement pump module;a drive module separately replaceable with respect to the positive displacement pump module, the drive module including an electric drive motor and a frequency converter for regulating or controlling a drive motor rotational speed;{'sub': 'S', 'control means having a regulator for generating a manipulated variable (Y) for the frequency converter as a function of a reference input variable (W) and a first actual operating parameter (X) and having logic means associated with the regulator; and'}reference input variable specifying means for supplying the reference input variable (W) for the control means,wherein the control means are provided in a control module that is separate from the drive module,wherein the drive module is replaceable separately from the control module, and{'sub': 'S', 'wherein the drive module does not have a regulator that is designed or triggered for ...

Priming Protection

Embodiments of the invention provide a pumping system for at least one aquatic application. The pumping system includes a pump, a motor coupled to the pump, and a controller in communication with the motor. The controller determines an actual power consumption of the motor and compares the actual power consumption to a reference power consumption. The controller also determines that the pump is in an unprimed condition if the actual power consumption is less than the reference power consumption and that the pump is in a primed condition if the actual power consumption is at least equal to the reference power consumption.

CONTROL SYSTEM AND METHOD FOR RECIPROCATING COMPRESSORS

The present invention relates to a control system for hermetic cooling compressor, which includes a reciprocating compressor () and an electronic control () for the reciprocating compressor (), the electronic control () being configured for, after commanding the turning off of the reciprocating compressor (), detecting whether the turn velocity () of the turning axle () is below a predefined velocity level, and then applying a braking torque () that causes deceleration of the turning axle () before completing the next turn of the turning axle (), in case the turn velocity () detected is below the velocity level (). 118.-. (canceled)193. A reciprocating compressor () comprising:{'b': 12', '8', '9, 'at least one mechanical assembly () comprising at least one compression mechanism () and one motor (); and'}{'b': '2', 'at least one electronic control ();'}{'b': 2', '23', '8', '36', '12', '23', '34', '36', '35, 'wherein the electronic control () is configured to detect a turn velocity () of the compression mechanism () and to apply a braking torque () to the mechanical assembly () during the stopping process of the compressor after detecting that the turn velocity () is below a predefined velocity value (), the braking torque () being initiated at a next moment () after a compression stroke has been completed; and'}{'b': 36', '23', '23', '8, 'the breaking torque () being configured for gradual deceleration of the turn velocity () such that the turn velocity () of the compression mechanism () has zero value at the moment when the new compression stroke is about to begin.'}2028834. A reciprocating compressor according to claim 19 , wherein the electronic control () detects the period that the compression mechanism () needs to carry out its movement and compares such a period with a maximum reference time claim 19 , the maximum reference time being related with the period which the compression mechanism () needs to carry out its movement at the predefined velocity value (). ...

DRIVING METHOD FOR METERING PUMP, DRIVING APPARATUS FOR METERING PUMP, VAPORIZER, AND ANESTHESIA APPARATUS

[Problems] To provide a driving method for a metering pump, a driving apparatus for a metering pump, a vaporizer and an anesthesia apparatus which are capable of suppressing a pulsation in the metering pump, and lowering the costs and reducing the sizes of the vaporizer and the anesthesia apparatus. 1. A driving method for a metering pump which includes an eccentric mechanism converting a revolving motion of a motor into a reciprocating motion of a plunger of the metering pump , and makes a constant liquid delivery by sucking and discharging a liquid through variations in the cubic volume of a cylinder of the metering pump caused by the reciprocating motion of the plunger ,wherein a discharge period of the metering pump is set to be longer than a suction period of the metering pump, and the revolution speed of the motor is controlled so that the travelling speed of the plunger is kept constant during the discharge period.2. The driving method for the metering pump according to claim 1 , wherein during the discharge period of the metering pump claim 1 , to vary the revolution speed of the motor in a sinusoidal form at intervals of a predetermined angle so that the motor makes a sinusoidal revolving motion.3. A driving apparatus for a metering pump claim 1 , comprising:a motor;a control section controlling the revolution of the motor; and 'wherein the control section sets a discharge period of the metering pump to be longer than a suction period of the metering pump, and controls the revolution speed of the motor so that the travelling speed of the plunger is kept constant during the discharge period.', 'a metering pump joined to the motor, the metering pump including an eccentric mechanism converting a revolving motion of the motor into a reciprocating motion of a plunger of the metering pump, and making a constant liquid delivery by sucking and discharging a liquid through variations in the cubic volume of a cylinder of the metering pump caused by the reciprocating ...

FRACTURING OPERATIONS PUMP FLEET BALANCE CONTROLLER

A system can include one or more processors; memory; a data interface that receives data; a control interface that transmits control signals for control of pumps of a hydraulic fracturing operation; and one or more components that can include one or more of a modeling component that predicts pressure in a well fluidly coupled to at least one of the pumps, a pumping rate adjustment component that generates a pumping rate control signal for transmission via the control interface, a capacity component that estimates a real-time pumping capacity for each individual pump, and a control component that, for a target pumping rate for the pumps during the hydraulic fracturing operation, generates at least one of engine throttle and transmission gear settings for each of the individual pumps using an estimated real-time pumping capacity for each individual pump where the settings are transmissible via the control interface. 12800. A system () comprising:{'b': '2810', 'one or more processors ();'}{'b': '2820', 'memory () accessible to at least one of the one or more processors;'}{'b': '2830', 'a data interface () that receives real-time data for individual pumps in a fleet of pumps during a hydraulic fracturing operation;'}{'b': '2840', 'a control interface () that transmits control signals for control of each of the individual pumps in the fleet of pumps during the hydraulic fracturing operation;'}{'b': '2870', 'a capacity component (), operatively coupled to at least one of the one or more processors, that estimates a real-time pumping capacity for each of the individual pumps in the fleet of pumps using at least a portion of the real-time data, wherein an estimated real-time pumping capacity for the fleet of pumps computed using the estimates is less than a maximum specified pumping capacity for the fleet of pumps due to operational degradation of at least one of the individual pumps; and'}{'b': '2880', 'a control component (), operatively coupled to at least one of the one ...

Pump Controller

A pump controller and methods for adjusting a pump speed or pump run time based on one or more pump control data. The pump control data may include forecasted weather information and non-weather information. The pump controller can be controlled remotely.

Method of Operating Cryogenic Pump and Cryogenic Pump System

A cryogenic pump system includes a supply of liquid natural gas, a source of hydraulic fluid, a cryogenic pump, and an electronic control module. The cryogenic pump is operatively arranged with the supply of liquid natural gas and the source of hydraulic fluid. The cryogenic pump is configured to operate using the source of hydraulic fluid to compress at least some of the supply of liquid natural gas for delivery to an engine. The electronic control module is operably arranged with the cryogenic pump and configured to selectively operate the cryogenic pump. Control strategies for operating the cryogenic pump system are disclosed which have reduced power demands. 1. A method of operating a cryogenic pump comprising:energizing a hydraulic pilot actuator in fluid communication with a spool valve to move the spool valve from a drain position to an extended fill position, the spool valve biased to the drain position;in response to the spool valve being displaced from the drain position, directing a pump flow of hydraulic fluid through the spool valve to a drive cylinder such that the pump flow of hydraulic fluid acts against a drive piston reciprocally disposed within the drive cylinder to move the drive piston from a retracted position to an extended pump position, the drive piston linked to a cryo-plunger assembly, the cryo-plunger assembly in communication with a supply of liquid natural gas;in response to the drive piston moving to the extended pump position, actuating the cryo-plunger assembly to perform a pump stroke to compress at least some of the supply of liquid natural gas;de-energizing the hydraulic pilot actuator after an energizing period of time has elapsed;controlling a rate of spool return of the spool valve from the extended fill position to the drain position after the hydraulic pilot actuator is de-energized such that the drive piston is in the extended pump position after a dwell period of time after the energizing period of time has elapsed;wherein ...

COMPRESSOR SYSTEM FOR A RAIL VEHICLE AND METHOD FOR OPERATING THE COMPRESSOR SYSTEM WITH SAFE EMERGENCY OPERATION

A rail vehicle compressor system and method for controlling the same use a compressor driven by an electrical machine via a drive shaft, to produce compressed air for at least one compressed air tank, wherein the electrical machine can be activated at least indirectly via a control device for operating the electrical machine at at least one nominal speed between a maximum speed and a minimum speed, wherein at least one pressure sensor determines the pressure for the control device and is disposed in a compressed-air-carrying line downstream of the compressor. A final control element continuously influences the speed of the electrical machine and can be activated via the control device, and wherein a pressure switch for monitoring the pressure in the at least one compressed air tank and for influencing at least the speed of the electrical machine is disposed in the compressed-air-carrying line downstream of the compressor. 1. A compressor system for a rail vehicle , the compressor system comprising:at least on compressed-air vessel;an electric machine;a drive shaft;a compressor which is driven by the electric machine via the drive shaft and which generates compressed air for the at least one compressed-air vessel;a regulation device which at least indirectly controls the electric machine for operation of the electric machine at at least a rated rotational speed between a maximum rotational speed and a minimum rotational speed;a compressed air-conducting line arranged downstream of the compressor and including at least one pressure sensor for determining the pressure for the regulation device;an electric supply; andan actuator arranged between the electrical supply and the electric machine, wherein the actuator continuously manipulates the rotational speed of the electric machine and is controlled by the regulation device; anda pressure switch arranged in the compressed air-conducting line downstream of the compressor for monitoring pressure in the at least one ...

ELECTRIC MOTOR CONTROL FOR PUMPJACK PUMPING

A pumpjack is driven by an electric motor coupled to a gear box. A local drive controller controls the motor in accordance with a varying motor speed profile over a pumping cycle of the pumpjack. The drive controller determines, based on sensory feedback from the one or more sensors, a pumping cycle load profile, automatically determines, based on the pumping cycle load profile, a varying voltage profile, and controls the motor in accordance with the varying motor speed profile while applying the varying voltage profile to the motor. 1. A pumpjack motor system , comprising:an electric motor coupled to a gear box of a pumpjack;one or more sensors mounted to monitor at least one operating condition of the pumpjack during operation of the motor; anda drive controller coupled to the motor and operable to control the motor in accordance with a varying motor speed profile over a pumping cycle of the pumpjack, while applying voltage to the motor; determine, based on sensory feedback from the one or more sensors, a pumping cycle load profile;', 'automatically determine, based on the pumping cycle load profile, a varying voltage profile; and to', 'control the motor in accordance with the varying motor speed profile while applying the varying voltage profile to the motor., 'wherein the drive controller is configured to'}2. The pumpjack motor system of claim 1 , wherein the varying motor speed profile comprises an altered version of a stroke timing curve implemented during one or more previous pumping cycles of the pumpjack.3. The pumpjack motor system of claim 1 , wherein the varying motor speed profile comprises a plurality of target motor speeds corresponding to each of a plurality of discrete control periods within the pumping cycle of the pump jack.4. The pumpjack motor system of claim 3 , wherein the pumping cycle load profile comprises a plurality of torque loads corresponding to each of the plurality of discrete control periods.5. The pumpjack motor system of claim 3 , ...

ELECTRIC PUMP

An electric pump includes a pump configured to suck, pressurize and discharge working fluid, a motor coupled with the pump and configured to drive the pump, a motor controller arranged laterally to the motor and configured to control the drive of the motor, and a cooling unit arranged between the motor and the motor controller and configured to cool the motor controller by a refrigerant circulating inside. The cooling unit includes a raised portion projecting into an inner space of the motor controller and formed with a flow passage for the circulation of the refrigerant inside. 1. An electric pump for discharging working fluid , comprising:a pump configured to suck, pressurize and discharge the working fluid;a motor coupled with the pump and configured to drive the pump;a motor controller arranged laterally to the motor and configured to control the drive of the motor; anda cooling unit arranged between the motor and the motor controller and configured to cool the motor controller by a refrigerant circulating inside,wherein the cooling unit includes a raised portion projecting into an inner space of the motor controller, the raised portion being formed with a flow passage for the circulation of the refrigerant inside.2. The electric pump according to claim 1 , wherein:the cooling unit further includes a guide portion configured to guide the refrigerant to pass through the flow passage formed in the raised portion.3. The electric pump according to claim 1 , wherein:the raised portion has an inclined surface inclined with respect to a direction perpendicular to a board arranged in the motor controller; andthe electric pump further comprises a circuit element including a terminal portion fixed to the board and a main body portion fixed to the inclined surface.4. The electric pump according to claim 1 , further comprising:a heat insulating layer provided between the motor and the cooling unit and configured to suppress heat transfer from the motor to the cooling unit.5 ...

METHOD FOR ACTUATING VALVE AND SYSTEM FOR ACTUATING VALVE FOR MULTI-SUCTION ALTERNATIVE COMPRESSOR

The present invention refers to a method for actuating semi-commanded valve that acts in synchronism with the compression cycles of an alternative compressor and to a system for actuating a multi-suction alternative compressor semi-commanded valve. Said method comprises at least a step of detecting at least one compression peak () in the course of at least one mechanical cycle () of the alternative compressor; and at least a step of switching the functional status of at least an alternative compressor semi-commanded valve () based on detecting at least one compression peak () in the course of at least one mechanical cycle () of the alternative compressor (). 1. A method for actuating a semi-commanded valve for alternative compressors , the method comprising:detecting at least one compression peak during at least one mechanical cycle of an alternative compressor; andswitching a functional status of the semi-commanded valve based on the detection of the at least one compression peak,wherein the at least one compression peak is detected by measuring a peak of at least one parameter of the alternative compressor.2. The method according to claim 1 , wherein the detection of the at least one compression peak includes measuring the peak of at least one electric parameter of an electric motor of the alternative compressor.3. The method according to claim 2 , wherein the electric parameter comprises the electric current of the electric motor of the alternative compressor.4. The method according to claim 3 , wherein the compression peak is equivalent to a positive peak of the electric current of the electric motor of the alternative compressor.5. The method according to claim 3 , wherein the compression peak is equivalent to at least one out-of-phase parameter relative to a positive peak of the electric current of the electric motor of the alternative compressor.6. The method according to claim 1 , wherein the detection of the at least one compression peak includes measuring ...

METHODS AND APPARATUS TO DETERMINE PARAMETERS OF A PUMPING UNIT FOR USE WITH WELLS

Methods and apparatus to determine parameters of a pumping unit for use with wells are disclosed. An example apparatus includes a housing and a processor positioned in the housing. The processor is to determine a first load on a polished rod of a pumping unit, to estimate a first torque of a motor of the pumping unit, and determine a first torque factor for the pumping unit. The processor is to, based on the first load, the first torque, and the first torque factor, determine a phase angle of a counterbalance of the pumping unit or a moment of the counterbalance. 1. A method , comprising:determining a first load on a polished rod of a pumping unit;estimating a first torque of a motor of the pumping unit;determining a first torque factor for the pumping unit, the first torque factor comprises a rate of change in a position of the polished rod with respect to an angle of a crank arm of the pumping unit;based on the first load, the first torque, and the first torque factor, determining a phase angle of a counterbalance of the pumping unit or a moment of the counterbalance.2. The method of claim 1 , further comprising determining the other of the phase angle of the counterbalance of the pumping unit or the moment of the counterbalance.3. The method of claim 1 , wherein the torque factor is determined using a reference table.4. The method of claim 3 , further comprising:moving the polished rod through a first cycle of the pumping unit using the motor;determining first pulse count values of the motor through the first cycle using a first sensor at first times, the first times being substantially equally spaced;determining first position values of the polished rod through the first cycle using a second sensor at the first times;associating the first pulse count values with respective ones of the first position values to calibrate a processor of the pumping unit; andgenerating the reference table using the first pulse count values and the first position values obtained at ...

APPARATUS USING ELECTRONICALLY-CONTROLLED VALVES

The pumps and pressure controllers described herein aim to pump fluid in two directions, such as from a first port to a second port and vice versa. The pressure controllers aim to control pressure in a system or device, such as a test device, accurately and precisely at a variety of different pressure levels. Generally described, the pumps and pressure controllers described herein may include two or more control valves, which may be actuatable in such a manner so that the pump or pressure controller can switch between operating as a vacuum pump and operating as a compressor. In some embodiments, the pressure controllers may be able to adjust a pressure in the device by small increments thereby providing increased control of the pressure in the device over the prior art. Furthermore, the pressure controllers may be able to control the pressure of a system having low pressure levels. 1. A pressure controller comprising:a housing including a first port, a second port, and a cavity, the cavity having a piston that varies a volume of the cavity by undergoing a compression stroke and an expansion stroke during operation of the pressure controller;a first control valve having an open state and a closed state, the first control valve selectively connecting the cavity in fluid communication with a fluid source via the first port when the first control valve is in the open position;a second control valve having an open state and a closed state, the second control valve selectively connecting the cavity in fluid communication with a system to be controlled via the second port when the second control valve is in the open position; anda computing device configured to actuate the first control valve and the second control valve between the open and closed states so as to operate the pressure controller in two modes of operation, the first mode of operation being as a compressor configured to supply fluid from the fluid source to the system, and the second mode of operation being ...

Pump device and method for controlling the same

[Object] To provide a pump device capable of stabilizing a suction flow rate irrespective of an outside air temperature and a control method therefor. [Solving Means] The control method for a pump device includes: outputting a drive signal for driving a motor at a rotation speed for discharging gas of the reference flow rate from the suction port of the pump main body; measuring a temperature of gas discharged from the suction port or a temperature of the pump main body by a temperature sensor attached to the pump main body; calculating an actual flow rate of the gas discharged from the suction port based on a temperature signal relating to the temperature of the gas included in an output of the temperature sensor; and correcting the drive signal such that the actual flow rate equals the reference flow rate and outputting the corrected drive signal to the motor.

MICROFLUIDIC PUMP APPARATUS AND METHODS

An apparatus and method, the apparatus comprising: a microfluidic channel (); an electromechanical gel () provided within the microfluidic channel (); at least one pair of electrodes () wherein the at least one pair of electrodes () are configured to control the electric field across the microfluidic channel () to cause the electromechanical gel () to deform in response to a voltage applied to the electrodes () such that the deformation enables fluid to be pumped through the microfluidic channel (). 115-. (canceled)16. An apparatus comprising:a microfluidic channel;an electromechanical gel provided within the microfluidic channel;at least one pair of electrodes wherein the pair of electrodes is configured to control an electric field across the microfluidic channel;wherein the at least one pair of electrodes are configured to control the electric field across the microfluidic channel to cause the electromechanical gel to deform in response to a voltage applied to the electrodes such that the deformation enables fluid to be pumped through the microfluidic channel.17. An apparatus as claimed in claim 16 , wherein the at least one pair of electrodes is configured to enable the voltage to be provided perpendicular to a direction of fluid flow within the microfluidic channel.18. An apparatus as claimed in claim 16 , wherein the at least one pair of electrodes is configured to provide a voltage across the microfluidic channel.19. An apparatus as claimed in claim 16 , wherein the at least one pair of electrodes is configured to provide a voltage close to the microfluidic channel.20. An apparatus as claimed in claim 16 , wherein the apparatus comprises a plurality of pairs of electrodes.21. An apparatus as claimed in claim 16 , wherein the plurality of pairs of electrodes extend parallel to a direction of fluid flow within the microfluidic channel.22. An apparatus as claimed in claim 16 , wherein the plurality of pairs of electrodes are configured to sequentially apply a ...

PERISTALTIC PUMPHEAD AND METHODS FOR ASSEMBLY THEREOF

A peristaltic pump may include a rotor rotatably mounted on a base and an occlusion bed mounted on the base and moveable toward and away from the rotor. The peristaltic pump may also include a lid hingedly mounted to the base along a first hinge axis including a mounting bracket extending perpendicularly relative to the first hinge axis. A linkage assembly connecting the occlusion bed and the lid may include a pair of curved arms hingedly mounted to the mounting bracket along a second hinge axis parallel to the first hinge axis and a cam connecting the pair of curved arms and having a cam surface facing the mounting bracket, the cam being hingedly mounted to the occlusion bed at an end opposite the second hinge axis. The mounting bracket abuts the cam surface and form a cooperative connection between the lid and the occlusion bed via the linkage assembly. 1. A peristaltic pump , comprising:a rotor rotatably mounted on a base of the peristaltic pump;an occlusion bed mounted on the base of the peristaltic pump and moveable toward and away from the rotor;a lid hingedly mounted to the base of the peristaltic pump along a first hinge axis, the lid including a mounting bracket extending perpendicularly relative to the first hinge axis; and a pair of curved arms hingedly mounted to the mounting bracket at a first end of each of the pair of curved arms about a second hinge axis parallel to the first hinge axis; and', 'a cam connecting the pair of curved arms and having a cam surface facing the mounting bracket, the cam being hingedly mounted to the occlusion bed at a second end of each of the pair of curved arms, the second end of each of the curved arms being opposite to the first end;, 'a linkage assembly comprisingwherein, when the lid is in a closed position, the mounting bracket extends between the pair of curved arms to abut the cam surface and form a cooperative connection between the lid and the occlusion bed via the linkage assembly.2. The peristaltic pump of claim ...

Pump arrangement and corresponding operating method

A pump arrangement, in particular in a coating installation for the coating of components, such as a painting installation for the painting of motor vehicle body components, is provided. The pump arrangement includes a plurality of adjustable pumps for delivering a coating agent, e.g. for delivering a sealing agent for the sealing of weld seams on a motor vehicle body component. The pumps are connected in parallel such that the pumps extract the coating agent for delivery from a common inlet line and deliver said coating agent into a common outlet line. The arrangement further includes a control device for the open-loop or closed-loop control of one fluid variable at the outlet of the individual pumps, respectively, wherein the control device actuates the individual pumps individually, and/or a monitoring unit, which switches the pumps on and off non-simultaneously.

Method for minimizing vibration in a multi-pump system

A technique for reducing harmonic vibration in a multiplex multi-pump system. The technique includes establishing a lower bound of system specific vibration-related information such as via pressure variation or other vibration indicator. Establishing the lower bound may be achieved through simulation with the system or through an initial sampling period of pump operation. During this time, random perturbations through a subset of the pumps may be utilized to disrupt timing or phase of the subset. Thus, system vibration may randomly increase or decrease upon each perturbation. Regardless, with a sufficient number of sampled perturbations, the lower bound may be established. Therefore, actual controlled system operations may proceed, again employing random perturbations until operation of the system close to the known lower bound is substantially attained.

Safety Vacuum Release System

Some embodiments of the invention provide a pumping system for at least one aquatic application. The pumping system includes a pump, a motor coupled to the pump, a user interface associated with the pump designed to receive input instructions from a user, and a controller in communication with the motor. The controller determines a power parameter associated with the motor and compares the power parameter to a predetermined threshold value. The controller triggers a safety vacuum release system based on the comparison of the power parameter and the threshold value. 1. A pumping system for at least one aquatic application , the pumping system comprising:a pump;a motor coupled to the pump;a user interface associated with the pump, the user interface configured to receive input instructions from a user;and the controller determining a power parameter associated with the motor,', 'the controller comparing the power parameter to a predetermined threshold value, and', 'the controller triggering a safety vacuum release system based on the comparison of the power parameter and the threshold value;', 'wherein the power parameter is an absolute power consumption value of the motor., 'a controller in communication with the motor,'}2. The pumping system of claim 1 , wherein the power parameter is based only on measurements and calculations related to the power consumption of the motor.3. The pumping system of claim 1 , wherein the controller operates the pump according to at least one schedule.4. The pumping system of further including an external controller configured to allow operation of the system from a remote location.5. The pumping system of claim 1 , wherein the controller will automatically restart the pump after an obstructed inlet has been detected and the pump has been stopped.6. The pumping system of further including a counter designed to reduce the number of nuisance trips.7. The pumping system of claim 1 , wherein the predetermined threshold value is determined ...

PUMP BASED FLUID FLOW METER

A fluid flow meter comprising a fluid pump to displace fluid with pumping strokes of one or more pumping stroke types wherein each of the one or more stroke types displaces a known volume of fluid, a sensor functionally associated with a fluid reservoir and adapted to generate a signal indicative of a fluid pumping condition within the fluid reservoir, which fluid reservoir is integral or functionally associated with the pump, and circuitry to trigger one or a sequence of strokes of the pump in response to a signal from the sensor. 1. A method of metering fluid flow from a fluid source , said method comprising:receiving at an inlet of a fluid reservoir fluid from the fluid source and altering a shape of a flexible reservoir component in response to an amount of fluid received within said reservoir, such that different states of said flexible component are characterized by different volumes of said reservoir,sensing a pumping condition in the reservoir through a physical sensor adapted to sense a parameter of fluid within the reservoir;generating a signal when the sensed parameter indicates a pumping condition relating to the fluid within the fluid reservoir has been met;triggering a pre-defined cycle of one or more strokes of a pump in response to the generated signal, wherein each pre-defined cycle of strokes displaces a known volume of fluid;each time the pre-defined cycle is triggered, displacing a known amount of fluid from the reservoir through an output of the reservoir while the inlet remains connected to the fluid source;storing a count of triggered pre-defined cycles; andcalculating a fluid flow into the reservoir based on the stored count of triggered cycles and based on the known amount of fluid associated with each triggered cycle of strokes.2. The method of claim 1 , wherein the pumping condition is a fluid amount in said reservoir reaching or exceeding an upper threshold.3. The method according to claim 1 , wherein the triggered pump is a peristaltic ...

Hydrostatic Axial Piston Pump for a Hydrostatic Traction Drive

A hydrostatic axial piston pump for a hydrostatic traction drive has an adjusting unit for adjusting the stroke volume. The adjusting unit has an actuating cylinder with two counteracting actuating pressure chambers. An actuating pressure can be set in each actuating pressure chamber via a separate pressure reducing valve, the said actuating pressure depending on and preferably being proportional to a current intensity on a respective solenoid of the respective pressure reducing valve. The two current intensities can be calculated via an electronic control unit on a model basis as a function of a speed and of an operating pressure of the axial piston pump and as a function of an operating element for a driver's request, e.g. an accelerator pedal. 1. A hydrostatic axial piston pump for a hydrostatic traction drive , the axial piston pump comprising:an adjusting unit configured to adjust a stroke volume, the adjusting unit including an actuating cylinder defining a first actuating pressure chamber in which a first actuating pressure is set via a first pressure reducing valve, the first actuating pressure depending on a first current intensity applied to a first solenoid of the first pressure reducing valve; andan electronic control unit configured to determine the first current intensity based on an actual rotational speed, an operating pressure of the axial piston pump, and an operating element that receives a driver's request.2. The hydrostatic axial piston pump according to claim 1 , wherein the actual rotational speed and the first actuating pressure acts in a first direction of an increase in the stroke volume claim 1 , while the operating pressure acts in a second direction of a reduction in the stroke volume.3. The hydrostatic axial piston pump according to claim 1 , wherein:the hydrostatic piston pump is configured to be operated both as a motor and as a pump,the actuating cylinder defines a second actuating pressure chamber, which acts counter to the first ...

PUMP STATUS DISPLAY MODULE, PUMP SYSTEM USING SAME AND METHODS RELATING THERETO

A pump system comprising a primary AC pump, a battery powered back-up pump, a back-up battery for powering the back-up pump, and a display unit for displaying the status of the pump system. The display unit having a visual indicator configured to be lit in at least two colors. 1. A pump system comprising:a primary AC pump;a battery powered back-up pump;a back-up battery for powering the back-up pump; anda display unit for displaying the status of the pump system, the display unit having a visual indicator configured to be lit in at least two colors.2. The pump system of :wherein the visual indicator is configured to be a first of the at least two colors when the back-up battery is in a good condition and a second of the at least two colors when the back-up battery is in a less than good condition.3. The pump system of wherein the first color is green and the second color is yellow.4. The pump system of claim 1 , the display unit further comprising an audio indicator.5. The pump system of wherein the visual indicator comprises at least one multi-color LED.6. The pump system of wherein the visual indicator comprises at least two monocolor lights of different colors claim 1 , wherein the at least two monocolor lights are positioned behind a single translucent panel.7. The pump system of claim 2 , wherein the visual indicator is configured to be a third color when the back-up battery has a poor condition.8. The pump system of further comprising a flood detector claim 1 , wherein the visual indicator is configured to flash when a flood is detected.9. The pump system of wherein the display unit comprises at least one of a smartphone claim 1 , a tablet claim 1 , and a computer.10. The pump system of further comprising a controller connected to the primary AC pump claim 1 , battery powered back-up pump claim 1 , back-up battery and display for controlling operation of the system and interfacing with same.11. A method of monitoring a pump system comprising:detecting a value, ...

Refrigerant Compressor System

In order to improve the operational reliability of a refrigerant compressor system that includes a first refrigerant line that conducts expanded refrigerant, a second refrigerant line that conducts compressed refrigerant, at least one refrigerant compressor that is arranged between the first and the second refrigerant line and is driven by a motor, and a control unit for operating the refrigerant compressor system, it is proposed that the control unit should have a first central processing unit and at least one input/output unit for control variables that communicates with the first central processing unit, and that there should be associated with the first central processing unit a second central processing unit which, in the event of a failure of the first central processing unit, takes over the control functions for the purpose of controlling the refrigerant compressor system.

Air conditioning apparatus

Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor ( 10 ) integrally including a compressor ( 5 ), an electric motor ( 6 ) that drives the compressor ( 5 ), and an inverter ( 7 ) including a temperature sensor ( 11 ) that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller ( 3 ) estimates a discharge temperature of the compressor ( 5 ) on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter ( 7 ), for the rotational speed of the compressor ( 5 ), and for the motive force of the compressor ( 5 ) in a refrigerating cycle ( 2 ).

INDEPENDENT CONTROL OF AUGER AND HOPPER ASSEMBLY IN ELECTRIC BLENDER SYSTEM

Embodiments relate to a hydraulic fracturing system that includes a blender unit. The system includes an auger and hopper assembly to receive proppant from a proppant source and feed the proppant to the blender unit for mixing with a fluid. A first power source is used to power the blender unit in order to mix the proppant with the fluid and prepare a fracturing slurry. A second power source independently powers the auger and hopper assembly in order to align the hopper of the auger and hopper assembly with a proppant feed from the proppant source. Thus, the auger and hopper assembly can be stowed or deployed without use of the first power source, which is the main power supply to the blender unit. 1. A method comprising: a blender tub with an upper opening,', 'an auger and hopper assembly including (i) a hopper with an upper opening to receive proppant from the proppant source and (ii) an auger positioned outside the hopper, the auger having an inlet to receive proppant from the hopper and an outlet to selectively release proppant from the auger to the blender tub, and', 'an auger and hopper power supply; and, 'positioning a blender unit proximate to a proppant source, the blender unit disposed on a trailer that includespowering the auger and hopper assembly with the power supply to deploy the auger and hopper assembly from a stowed position to a deployed position, the deployed position being in alignment with a proppant feed from the proppant source.2. The method of claim 1 , further comprising:connecting the blender unit to a blender unit power supply;receiving, from the proppant feed, proppant into the hopper through the upper opening of the hopper;transporting proppant from the auger inlet to the auger outlet;releasing proppant from the auger outlet into the blender tub;mixing the proppant in the blender tub with a fluid to prepare a fracturing slurry; andboosting the fracturing slurry to a fracturing pump system.3. The method of claim 2 , wherein the proppant ...

BUILT-IN AIR PUMP AND INFLATABLE DEVICE

A built-in air pump comprises a housing body and a panel. The panel couples to the housing body and defines an opening. A main pump body couples to the housing body and defines a first accommodating chamber in fluid communication with the opening and with a first and a second venting port. An air replenishing pump has an air replenishing pump body that is located adjacent to the main pump body. The air replenishing pump body couples to the housing body and defines a second accommodating chamber having therein the air replenishing pump. An air passage switch, located in the first accommodating chamber, is moveable between a first and a second position. A controller is in electrical connection with the air replenishing pump and configured to activate the air replenishing pump based on a time determination. An inflatable body including the built-in air pump assembly is also disclosed herein. 1. A built-in air pump for an inflatable body , comprising:a housing body and a panel, said panel being coupled to said housing body and defining an opening in fluid communication with an outer environment of the inflatable body;a main pump body coupled to said housing body and defining a first accommodating chamber, a first venting port, and a second venting port, said first accommodating chamber being in fluid communication with said opening, said first venting port and said second venting port;an air replenishing pump having an air replenishing pump body, said air replenishing pump body located adjacent to said main pump body and coupled to said housing body, said air replenishing pump body defining a second accommodating chamber having therein said air replenishing pump; wherein when said air passage switch is in said first position, said air passage switch, said main pump body, and said first venting port collectively define an inflation air passage;', 'wherein when said air passage switch is in said second position, said air passage switch, said main pump body, and said ...

A METHOD FOR DESIGNING, GAUGING AND OPTIMIZING A MULTILPE COMPRESSOR SYSTEM WITH RESPECT TO ENERGY EFFICIENCY

The present invention describes a method for gauging energy used for producing a unit of mass or volume of compressed gas (Specific Energy Consumption) in relation to a common output flow in a multiple compressor system, said method comprising: —from a first compressor, constructing an ideal specific energy consumption curve in the first compressor as a function of the output flow of the first compressor; and —from a first compressor and a second compressor, constructing a combined ideal specific energy consumption specific energy consumption curve in the first compressor and the second compressor as a function of the combined output flow of the first compressor and the second compressor, wherein the method involves constructing one or several ideal specific energy consumption curve(s) for multiple combined compressors, in any combination(s), and wherein the method involves creating a theoretical operation model for the multiple compressor system. 2. The method according to claim 1 , wherein the method involves constructing the ideal specific energy consumption curve(s) for one or more fixed system reference pressure(s).3. The method according to claim 1 , wherein the method involves constructing one or several ideal specific energy consumption curves(s) for multiple combined compressors claim 1 , in any combination(s) claim 1 , and wherein at least one combination is based on combining adjustable flow ranges of individual compressors.4. The method according to claim 1 , wherein the operation model is based on combing non-adjustable flow ranges and adjustable flow ranges for individual compressors separately to form one single virtual compressor.5. The method according to claim 1 , wherein the ideal specific energy consumption curve(s) is calculated with specific energy consumption set as a constant within the compressor(s) regulating flow range and where ideal specific energy consumption is calculated from a constant power use for the compressor(s) non-regulating ...

SYSTEM FOR SUPPLYING COMPRESSED GAS TO SEVERAL GAS-FED DEVICES

A system for supplying compressed gas to several gas-fed devices is based on a liquid piston gas multistage compressor (). Gas pressure measurements performed at a gas intake (), an intermediate gas outlet () and at an end gas outlet () of the system allow controlling respective gas capacities of the compressor stages. Easy and reliable control can thus be obtained for the system operation. Varying the number of the compressor stages allows matching any pressure requirements for the gas delivery to all the gas-fed devices, and varying the gas capacities of the compressor stages allows easy adaptation to variable gas consumptions of the gas-fed devices. 2. System according to claim 1 , further comprising:{'b': 12', '11', '13', '1, 'a first controller () connected for receiving a first pressure set-point, and also for receiving the first pressure measurement results from the first pressure sensor (), and connected for transmitting at least one first operating parameter value to the first regulation means (), said at least one first operating parameter controlling the gas capacity of the first compressor stage () in the chain, and being inferred by the first controller from at least one difference between one of the first pressure measurement results and the first pressure set-point;'}{'b': 22', '21', '20', '24, 'a second controller () connected for receiving a second pressure set-point, and also for receiving the second pressure measurement results from the second pressure sensor (), and connected for transmitting a second operating parameter value to the second regulation means, said second operating parameter controlling a gas flow through the intermediate gas outlet () using the draw-off valve (), and being inferred by the second controller from at least one difference between one of the second pressure measurement results and the second pressure set-point; and'}{'b': 32', '31', '43', '4, 'a third controller () connected for receiving a third pressure set-point, ...

Subassembly For A Compressor

A subassembly for a compressor controls a fluid flow of a fluid between a high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and a suction pressure region of the compressor. The subassembly includes a first electrical control valve, a second electrical control valve, and an electrical control device. Each of the first electrical control valve and the second electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions. The electrical control device is adapted to control, during operation of the compressor, a fluid flow between the high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and the suction pressure region by controlling the positions of the valve members. 1. A subassembly for a compressor that controls a fluid flow of a fluid between a high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and a suction pressure region of the compressor , comprising: a first valve housing with a plurality of first connections for the high-pressure region and for the crank chamber pressure region, and', 'a first valve member arranged within the first valve housing and which can be displaced between a pair of first positions in which the first valve member either connects the high-pressure region and the crank chamber pressure region to each other or separates the high-pressure region and the crank chamber pressure region from each other;, 'a first electrical control valve having a second valve housing with a plurality of second connections for the crank chamber pressure region and for the suction pressure region, and', 'a second valve member which is arranged within the second valve housing and which can be displaced between a pair of second positions in which the second valve member either connects the crank chamber pressure region and the suction pressure region or ...

Portable pump

A portable pump is provided including an electric motor having a drive shaft connected to a gear assembly to drive a reciprocating air compressor arrangement. The reciprocating air compressor arrangement includes a crank that drives a connecting rod and a piston within a cylinder. The connecting rod has a first end and a second end and the first end of the rod is connected to the crank while the second end of the rod connected to the piston (to drive the piston in the cylinder and provide compression). The second end of the connecting rod is connected to the piston via a pin. The piston includes a sealing arrangement. A control unit is provided which is in electrical communication with the electric motor and the air compressor to control the operation of the pump arrangement. A power supply is also provided in electrical communication with the control unit to supply power to the control unit and electric motor. The pump is provided within a housing which accommodates the electric motor, the gear assembly, the reciprocating air compressor, the control unit and the power supply. A outlet connected to the reciprocating air compressor is also provided so as to engage with an object to be pumped.

SYSTEMS AND METHODS FOR CONTROLLING MULTI-CHAMBER SUBSEA PUMPS

Methods and systems for controlling the timing of a fluid driven positive displacement pump (FDPDP) are disclosed using pump inlet pressure, flow rate and time domain control. Pressure is thus controlled at various flow rates of fluids to be pumped in subsea environments. The FDPDP includes a plurality of pressure vessels connected by piping, each vessel having two chambers. One chamber is connected to a source of fluid to be pumped and the other chamber is connected to a source of driving fluid. The methods synchronize pumping chambers that have no mechanical means to control timing between each pumping chamber. The control methods described utilize algorithms which receive feedback from the pumping system to control the pumping sequence and adapt to any parameter changes to maintain a constant range of desired pressure. 1. A method for controlling a subsea fluid driven positive displacement pump in a subsea pumping operation by regulating a pump inlet pressure or a pump inlet flow rate , the method comprising: i. a plurality of pressure vessels connected in parallel wherein each pressure vessel has a first and a second chamber separated by a diaphragm or a piston therein and wherein the first chamber of each pressure vessel is connected to a source of fluid to be pumped from a first location to a second location;', 'ii. a pump inlet conduit connecting the first chamber of each of the pressure vessels to the source of fluid to be pumped;', 'iii. a first and a second valve for controlling flow of the fluid to be pumped into and out of the first chamber of each pressure vessel, respectively, wherein the first valve is located in the pump inlet conduit between the first chamber and the source of fluid and the second valve is located in a conduit between the first chamber and the second location;', 'iv. a third and a fourth valve for controlling flow of a driving fluid into and out of the second chamber of each pressure vessel, respectively, wherein the third valve is ...

METHODS AND DEVICES FOR DRIVING A PIEZOELECTRIC PUMP

A voltage driving apparatus for a portable fluid pump comprising a power source arranged to provide a direct current, a DC gain unit electrically connected, in use, to receive a voltage from the power source and output an amplified voltage, and a DC to AC conversion unit arranged, in use, to receive the amplified voltage from the DC gain unit and output a periodic waveform to drive a piezoelectric actuator in the portable fluid pump. The output periodic waveform comprises a first discrete voltage level and a second discrete voltage level. Each period of the waveform comprises the first voltage level for a first length of time and a second voltage level for a second length of time. 1. A voltage driving apparatus for a portable fluid pump , comprising:a power source, arranged to provide a direct current;a DC gain unit electrically connected, in use, to receive a voltage from the power source and output an amplified voltage;a DC to AC conversion unit arranged, in use, to receive the amplified voltage from the DC gain unit and output a periodic waveform to drive a piezoelectric actuator in the portable fluid pump;the output periodic waveform comprising a first discrete voltage level and a second discrete voltage level, wherein each period of the waveform comprises the first voltage level for a first length of time and a second voltage level for a second length of time.2. An apparatus according to claim 1 , wherein a ratio of the first and second times at the first and second voltage levels is adjusted to produce a waveform having attenuated harmonics claim 1 , and wherein the output waveform is modulated to further comprise in each period a third voltage level for a third length of time claim 1 , after the first and second lengths of time claim 1 , and wherein the second voltage level is higher than the first voltage level and the third voltage level is between the first and second voltage levels.37-. (canceled)8. An apparatus according to claim 1 , wherein the DC gain ...

HYDRAULIC SYSTEM

A hydraulic system includes: a cylinder that moves a moving object in a vertical direction by extension and retraction of a rod; a first bidirectional pump connected to a head-side chamber of the cylinder by a first supply/discharge line; a second bidirectional pump connected to a rod-side chamber of the cylinder by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and a servomotor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable. 1. A hydraulic system comprising:a cylinder that moves a moving object in a vertical direction by extension and retraction of a rod and in which an interior of a tube is divided by a piston into a head-side chamber and a rod-side chamber;a first bidirectional pump connected to the head-side chamber by a first supply/discharge line;a second bidirectional pump connected to the rod-side chamber by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps;a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; anda servomotor that drives the first or second bidirectional pump, whereinat least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.2. The hydraulic system according to claim 1 ...

ELECTRICAL SUBMERSIBLE PUMP CONTROL

A system, method, and computer-readable medium for determining the flow rate and fluid density in an electrical submersible pump (ESP) and controlling the ESP based on the flow rate and density. In one implementation, an ESP system includes an ESP, drive circuitry, a current sensor, a voltage sensor, and a processor. The ESP includes an electric motor. The drive circuitry is electrically coupled to the ESP and is configured to provide an electrical signal to power the ESP. The current sensor is configured to measure a current of the electrical signal. The voltage sensor is configured to measure a voltage of the electrical signal. The processor is configured to calculate speed of a shaft of the electric motor based on a frequency induced by rotation of the motor detected in the current. The processor is also configured to calculate a density of fluid in the ESP based on the speed. 1. An electrical submersible pump system , comprising:an electrical submersible pump (ESP) comprising an electric motor;drive circuitry electrically coupled to the ESP and configured to provide an electrical signal to power the ESP;a current sensor configured to measure a current of the electrical signal;a voltage sensor configured to measure a voltage of the electrical signal; and calculate speed of a shaft of the electric motor based on a frequency induced by rotation of the electric motor detected in the current;', 'calculate a density of a fluid in the ESP based on the speed., 'a processor configured to2. The electrical submersible pump system of claim 1 , wherein the processor is configured to: determine a flow rate of the fluid in the ESP based on the speed.3. The electrical submersible pump system of claim 1 , wherein the processor is configured to:determine a value of head based on the speed; anddetermine the density based on the value of head.4. The electrical submersible pump system of claim 1 , wherein the processor is configured to determine a torque in the ESP based on:a ...

Pump Controller System and Method

A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can detect fault conditions, and can store fault conditions for later retrieval.

Intake profile for optimized utilization of motor characteristics

Systems and methods for operating a stepper motor of a pump at a desired low velocity include memory for storing information corresponding to an intake velocity profile. The intake velocity profile represents an optimized acceleration curve for operating the stepper motor over a range of motor velocities during an intake cycle. A processor of a system controller dynamically accesses the memory during the intake cycle to acquire the information representing the intake velocity profile and issues a series of pulses to the stepper motor based on this information. In response to the pulses, the stepper motor accelerates in accordance with the optimized acceleration curve represented by the intake velocity profile. The optimized acceleration curve is based on the available torque of the stepper motor across a range of motor velocities and enables the motor to operate with greater torque utilization and less margin than traditional linear acceleration profiles.

MEMBRANE VACUUM PUMP

A membrane vacuum pump includes at least one membrane pump stage, at least one inlet valve for a process gas to be conveyed associated with the membrane pump stage, and at least one gas ballast valve for the supply of a ballast gas. The flow path for the ballast gas, leading through the gas ballast valve, opens into the flow path for the process gas behind the inlet valve in the direction of flow of the process gas. 112202220122220. A membrane vacuum pump comprising at least one membrane pump stage () , at least one inlet valve () for a process gas to be conveyed and at least one gas ballast valve () for the supply of a ballast gas , wherein the at least one inlet valve () is associated with the membrane pump stage () , and wherein the flow path for the ballast gas leading through the gas ballast valve () opens into the flow path for the process gas behind the inlet valve () in the direction of flow of the process gas.220. The vacuum pump in accordance with claim 1 , wherein the flow path for the ballast gas opens into the flow path for the process gas directly behind the inlet valve ().322. The vacuum pump in accordance with claim 1 , wherein the gas ballast valve () is an electromagnetic valve.42222. The vacuum pump in accordance with claim 1 , further comprising a control device claim 1 , the control device being operationally connected to the gas ballast valve () and the gas ballast valve () being able to be controlled for actuation by the control device.51412. The vacuum pump in accordance with claim 1 , further comprising at least one further membrane pump stage () in addition to the one membrane stage ().61412. The vacuum pump in accordance with claim 5 , wherein the at least one further membrane pump stage () is connected downstream of the one membrane pump stage () in the direction of flow of the process gas.722. The vacuum pump in accordance with claim 1 , wherein the gas ballast valve () has an adjustable connectivity.822. The vacuum pump in accordance ...

PRECISION ANALYTICAL PUMP

Precision Analytical Pump of continuous flow, programmable and without pulsation, moves liquids and solutions without dead recharge time, for application in instrumental chemical analysis, in pharmaceutical and Fine Chemistry process lines. It consists of a micro-step electric motor (), who drives a shaft with linear displacement (), coupled to two pistons (), which penetrate two volumetric chambers of variable volume (), with antechambers () arranged between said chambers and motor, involving the movement path of pistons. Said chambers have connections with valves () for directional flow control and inner walls fit pistons with sealing rings (). Said antechambers communicate in order inner saturated air can go from one to the other, for pressure equilibrium during pistons displacement. A digital electronic circuit monitors pump operation, limiting pistons course by sensors (), and allows interface with the operator and with a computer. 132) “ANALITICAL PRECISION PUMP” , instrument for propulsion of liquids , particularly applicable to analytical instrumentation , chemical and pharmaceutical industrial process control and outpatient infusion , characterized by the fact of presenting two symmetrical and coaxial opposing pistons () , driven by common axis with alternating linear movement ().24) “ANALITICAL PRECISION PUMP” claim 1 , instrument for propulsion of liquids claim 1 , particularly applicable to analytical instrumentation claim 1 , chemical and pharmaceutical industrial process control and outpatient infusion claim 1 , characterized by the fact of presenting claim 1 , in conformity with claim 1 , two volumetric chambers of variable volume () claim 1 , opposed claim 1 , symmetrical and coaxial.35) “ANALITICAL PRECISION PUMP” claim 1 , instrument for propulsion of liquids claim 1 , particularly applicable to analytical instrumentation claim 1 , chemical and pharmaceutical industrial process control and outpatient infusion claim 1 , characterized by the fact of ...