Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 8. Отображено 8.
11-01-2012 дата публикации

Control method of low-speed stage starting of static frequency conversion starting of pumped storage power station

Номер: CN0101621271B
Автор: HONGSHUI LU, WEI FENG, BO YANG, DESHUN WANG, XIAONAN XU, JIA CHAI, LU HONGSHUI, FENG WEI, YANG BO, WANG DESHUN, XU XIAONAN, CHAI JIA
Принадлежит:

The invention relates to a control method of low-speed stage starting of static frequency conversion starting of a pumped storage power station, comprising the following steps: calculating the initial position of a rotor; estimating each force commutation moment of a low-speed stage inverting bridge according to a preset constant acceleration value; electrifying an appointed two-phase winding at the unlocking moment of a frequency converter according to an interval to which the initial position of the rotor belongs; switching a rectifier bridge to an inversion run mode at the forced commutation moment, sending a trigger pulse to a thyristor bridge arm corresponding to the appointed two-phase winding according to an interval to which a rotor position angle belongs at the moment after a loop of a frequency converter is cut out and each bridge arm of the inverting bridge is reliably shut off, and simultaneously switching the rectifier bridge to a rectifying run mode, and ending single forced ...

Подробнее
Номер записи: 1
06-01-2010 дата публикации

Control method of low-speed stage starting of static frequency conversion starting of pumped storage power station

Номер: CN0101621271A
Автор: HONGSHUI LU, WEI FENG, BO YANG, DESHUN WANG, XIAONAN XU, JIA CHAI, LU HONGSHUI, FENG WEI, YANG BO, WANG DESHUN, XU XIAONAN, CHAI JIA
Принадлежит:

The invention relates to a control method of low-speed stage starting of static frequency conversion starting of a pumped storage power station, comprising the following steps: calculating the initial position of a rotor; estimating each force commutation moment of a low-speed stage inverting bridge according to a preset constant acceleration value; electrifying an appointed two-phase winding at the unlocking moment of a frequency converter according to an interval to which the initial position of the rotor belongs; switching a rectifier bridge to an inversion run mode at the forced commutation moment, sending a trigger pulse to a thyristor bridge arm corresponding to the appointed two-phase winding according to an interval to which a rotor position angle belongs at the moment after a loop of a frequency converter is cut out and each bridge arm of the inverting bridge is reliably shut off, and simultaneously switching the rectifier bridge to a rectifying run mode, and ending single forced ...

Подробнее
Номер записи: 2
04-02-2009 дата публикации

Multiple freedom degree dynamic control method for inverse transform bridge phase shifting advance angle of stationary frequency conversion starter

Номер: CN0101359875A
Автор: HONGSHUI LU, BO YANG, FEI ZHENG, WEI FENG, XIAODONG ZHU, LU HONGSHUI, YANG BO, ZHENG FEI, FENG WEI, ZHU XIAODONG
Принадлежит:

Disclosed is a multi-degree-of-freedom dynamic control method of an inverter bridge advance commutation angle of a static frequency converter starter, comprising the steps of: the detection of motor operating frequency, main circuit direct current of a static frequency converter, terminal voltage, and the calculation of the inverter bridge advance commutation angle, Beta=cos<-1>(cos(360f(t(off)+t0))-(square root 2X(C)I(d)/U))+Xi. The control method enables the inverter bridge advance commutation angle to carry on the dynamic control with the change of motor operating frequency, of main circuit direct current of the static frequency converter and of terminal voltage in the process of frequency conversion start, and causes a considerable reduction in the inverter bridge advance commutation angle while ensuring the constant of the arc extinguishing time of the inverter bridge commutation, so as to reduce the main circuit output direct current of the frequency converter and increase the power ...

Подробнее
Номер записи: 3
02-06-2010 дата публикации

Method for detecting initial position of rotor of static frequency-conversion starting motor of pumped storage power station

Номер: CN0101719753A
Автор: JIA CHAI, WEI FENG, GUANJUN LI, HUADONG LIU, HONGSHUI LU, BINGYU SANG, YIBIN TAO, DESHUN WANG, XIAONAN XU, BO YANG, BIN YU, CHAI JIA, FENG WEI, LI GUANJUN, LIU HUADONG, LU HONGSHUI, SANG BINGYU, TAO YIBIN, WANG DESHUN, XU XIAONAN, YANG BO, YU BIN
Принадлежит:

The invention relates to a method for detecting the initial position of a rotor of a static frequency-conversion starting motor of a pumped storage power station, comprising the following steps of: judging primary excitation time of the rotor through the AD sampling of the voltage of a machine end line; calculating three-phase voltage in a static coordinate after the primary excitation time of the rotor is discovered; calculating the magnetic flow of the rotor in the static coordinate through a self-adaption magnetic flow regulating algorithm; and solving a position angle of the rotor through arc tangent, wherein the position angle of the rotor is an initial position angle of the rotor when the position of the rotor is stable. The invention judges the primary excitation time of the rotor through reasonable arrangement and provides the endurance for accurately starting integral operation; a self-adaption magnetic flow regulator can fast and accurately calculate the position of the rotor, ...

Подробнее
Номер записи: 4
30-09-2009 дата публикации

Ice melting method and device used by same

Номер: CN0101546896A
Автор: WU WEINING, ZHU XIAODONG, LU HONGSHUI, FENG WEI, YANG BO, WEINING WU, XIAODONG ZHU, HONGSHUI LU, WEI FENG, BO YANG
Принадлежит:

The invention disclose a direct current ice melting method by changing a cascade mode of a diode rectifier bridge or adjusting a differential voltage tap of a preceding transformer and a device used by the same. The method is simple and reliable, has small impact on a system and is suitable for ice melting of various circuit lengths because of multiple gears of adjustable voltage and large adjustable voltage range. The method is characterized in that: by changing the cascade mode of the transformer and the diode rectifier bridge and simultaneously changing the transformer tap, the output voltage is gradually increased, and the ice melting current is correspondingly and gradually increased to the maximum output current so as to realize the ice melting of various circuits with different lengths.

Подробнее
Номер записи: 5
23-05-2012 дата публикации

Method for detecting initial position of rotor of static frequency-conversion starting motor of pumped storage power station

Номер: CN0101719753B
Автор: JIA CHAI, WEI FENG, GUANJUN LI, HUADONG LIU, HONGSHUI LU, BINGYU SANG, YIBIN TAO, DESHUN WANG, XIAONAN XU, BO YANG, BIN YU, CHAI JIA, FENG WEI, LI GUANJUN, LIU HUADONG, LU HONGSHUI, SANG BINGYU, TAO YIBIN, WANG DESHUN, XU XIAONAN, YANG BO, YU BIN
Принадлежит:

The invention relates to a method for detecting the initial position of a rotor of a static frequency-conversion starting motor of a pumped storage power station, comprising the following steps of: judging primary excitation time of the rotor through the AD sampling of the voltage of a machine end line; calculating three-phase voltage in a static coordinate after the primary excitation time of the rotor is discovered; calculating the magnetic flow of the rotor in the static coordinate through a self-adaption magnetic flow regulating algorithm; and solving a position angle of the rotor througharc tangent, wherein the position angle of the rotor is an initial position angle of the rotor when the position of the rotor is stable. The invention judges the primary excitation time of the rotor through reasonable arrangement and provides the endurance for accurately starting integral operation; a self-adaption magnetic flow regulator can fast and accurately calculate the position of the rotor, ...

Подробнее
Номер записи: 6
14-09-2011 дата публикации

Ice melting method

Номер: CN0101546896B
Автор: LU HONGSHUI, WU WEINING, FENG WEI, ZHU XIAODONG, YANG BO, HONGSHUI LU, WEINING WU, WEI FENG, XIAODONG ZHU, BO YANG
Принадлежит:

The invention disclose a direct current ice melting method by changing a cascade mode of a diode rectifier bridge or adjusting a differential voltage tap of a preceding transformer and a device used by the same. The method is simple and reliable, has small impact on a system and is suitable for ice melting of various circuit lengths because of multiple gears of adjustable voltage and large adjustable voltage range. The method is characterized in that: by changing the cascade mode of the transformer and the diode rectifier bridge and simultaneously changing the transformer tap, the output voltage is gradually increased, and the ice melting current is correspondingly and gradually increased to the maximum output current so as to realize the ice melting of various circuits with different lengths.

Подробнее
Номер записи: 7
02-03-2011 дата публикации

Multiple freedom degree dynamic control method for inverse transform bridge phase shifting advance angle of stationary frequency conversion starter

Номер: CN0101359875B
Автор: XIAODONG ZHU, WEI FENG, HONGSHUI LU, FEI ZHENG, BO YANG, ZHU XIAODONG, FENG WEI, LU HONGSHUI, ZHENG FEI, YANG BO
Принадлежит:

Disclosed is a multi-degree-of-freedom dynamic control method of an inverter bridge advance commutation angle of a static frequency converter starter, comprising the steps of: the detection of motor operating frequency, main circuit direct current of a static frequency converter, terminal voltage, and the calculation of the inverter bridge advance commutation angle, Beta=cos<-1>(cos(360f(t(off)+t0))-(square root 2X(C)I(d)/U))+Xi. The control method enables the inverter bridge advance commutation angle to carry on the dynamic control with the change of motor operating frequency, of main circuit direct current of the static frequency converter and of terminal voltage in the process of frequency conversion start, and causes a considerable reduction in the inverter bridge advance commutation angle while ensuring the constant of the arc extinguishing time of the inverter bridge commutation, so as to reduce the main circuit output direct current of the frequency converter and increase the power ...

Подробнее
Номер записи: 8