Motordrehzahlsteuerungsvorrichtung

Regelschaltung fuer dynamoelektrische Kupplungen

Elektro-Servolenkeinheit

Elektroservolenkeinheit mit einem Lenkmechanismus zum Lenken eines Rades (8) durch das Lenkmoment eines Lenkrads (1); einem Motor (7) zum Hinzufügen einer Lenkhilfsenergie zu dem Lenkmechanismus; einem Controller (3) zum Steuern eines durch den Motor zu leitenden Stroms in Übereinstimmung mit einem Lenkzustand; einer Speichervorrichtung (107) zum Speichern eines Zustands des Controllers (3); und einer Anfangswerteinstellvorrichtung (108) zum Veranlassen der Steuervorrichtung (107), einen Zustand des Controllers (3) zu speichern, wenn ein Zündschalter (101) von einem EIN-Zustand in einen AUS-Zustand geändert wird, dadurch gekennzeichnet, dass die Anfangswerteinstellvorrichtung (108) ferner vorgesehen ist zum Erhalten eines Überhitzungsprozesszustands des Controllers (3) oder des Motors (7) basierend auf einem Zustand des Controllers (3), der in der Speichervorrichtung (107) gespeichert worden ist und eines Prozesszustandes während der Zündschalter (101) sich im AUS-Zustand befindet, um einen ...

Solldrehzahl-Stellglied fuer Kupplungsmotorantrieb

VORRICHTUNG ZUR REGELUNG DER DREHZAHL EINES MOTORS

Positionsregeleinrichtung zum Regeln eines elektrischen Motors

Motorantriebssystem

Motorantriebssystem (2) für einen Elektromotor, der mehrere Phasenwicklungen (U, V, W) aufweist, wobei das Motorantriebssystem aufweist:eine Spannungsquelle mit einer Spannungsquellengleichspannung (Vp),eine Pulsbreitenmodulationsschaltung (42), die Antriebspulssignale zum Antreiben der Phasenwicklungen bereitstellt, wobei die Antriebspulssignale jeweils Pulse aufweisen, deren Pulsbreiten so moduliert sind, dass sie ein vorgeschriebenes Tastverhältnis (Rd) aufweisen, undeinen Umwandler, der erste Schaltungselemente (301, 302, 303), die jeweils zwischen den Phasenwicklungen und der Spannungsquelle angeordnet sind, und zweite Schaltungselemente (304, 305, 306) aufweist, die jeweils zwischen den Phasenwicklungen und einer Masse angeordnet sind, wobei die ersten und zweiten Schaltungselemente gemäß den Antriebssignalen der Pulsbreitenmodulationsschaltung angesteuert werden, undeine Stromerfassungsschaltung (8) zur Erfassung tatsächlicher Stromwerte (la) des Umwandlers,eine Spannungsberechnungsschaltung ...

Regler zur Steuerung einer Aktuatorvorrichtung, die auf einem Fahrzeug installiert ist, um Stille und Komfort in dem Fahrzeug aufrechtzuerhalten

Ein Regler zum Regeln einer Aktuatorvorrichtung (14), die in einem Fahrzeug installiert und durch einen Monitor (26) betrieben wird. Der Regler umfasst: einen Bereich zum Steuern des Motors (166), der in der Lage ist, den Motor auf Basis eines Sollwertes (r*) zu steuern; und einen Bereich zur Bestimmung eines Sollwertes (160), der in der Lage ist, den Sollwert auf Basis einer Wellenintensitätscharakteristik zu bestimmen. Die Wellenintensitätscharakteristik wird durch eine Beziehung (D¶S¶ = F¶S(r)¶, D¶V¶ = F¶V(r)¶) zwischen [A] einer Intensität einer weitergeleiteten Welle (D), die die Intensität einer Welle angibt, die als Ergebnis der Aktivierung der Aktuatorvorrichtung erzeugt wird und die an die Insassen des Fahrzeugs weitergeleitet wird, und [B] einem Ausgabeindex (r) wiedergegeben, der eine Größe einer Ausgabe des Motors kennzeichnet. Ebenfalls ist eine Vorrichtung zum Erhalten der Wellenintensitätscharakteristik offenbart, um die Wellenintensitätscharakteristik durch Messen der Intensität ...

Verfahren und Vorrichtung zur Detektion eines Statorwicklungsfehlers in einem Wechselstrommotor

Ein Statorwicklungsfehlerdetektor für einen Wechselstrommotor, wobei der Statorwicklungsfehlerdetektor Folgendes aufweist:eine Vielzahl von Sensoren (26a, 26b) zur Akquirierung eines Satzes von Stromwerten und eines Satzes von Spannungswerten vom Wechselstrommotor;einen Prozessor (30) zum Berechnen von Sequenzkomponenten aus dem Satz von Stromwerten und aus dem Satz von Spannungswerten; wobeider Prozessor (30) eine Synchronreferenzrahmentransformation zum Berechnen der Sequenzkomponenten aus dem Satz von Stromwerten und dem Satz von Spannungswerten anwendet;ein feed-forward neuronales Netzwerk (FFNN) (38) verbunden für den Empfang von zumindest einem Teil der Sequenzkomponenten von dem Satz von Stromwerten und dem Satz von Spannungswerten als eine Eingabereihe bzw. Eingabeanordnung und mit einer Ausgabe zum Vorsehen von geschätzten Werten für zumindest zwei Sequenzphasoren bzw. Sequenzzeigervektoren; undeinen Vergleicher (42) verbunden mit dem Ausgang des FFNN (38) zum Vergleichen der geschätzten ...

Regelungsvorrichtung für einen Elektromotor und zugehöriges Auslegungsverfahren

Es wird eine Regelungsvorrichtung für einen elektrischen Motor, bei der ein hohes robustes Stabilitätsleistungsverhalten und ein Nachführungsleistungsverhalten miteinander vereinbar sind, sowie ein zugehöriges Auslegungsverfahren beschrieben. Eine Rückkopplungskorrektur wird auf der Grundlage einer erfassten Motordrehzahl erhalten, und eine Vorwärtskopplungskorrekturgröße wird auf der Grundlage eines berechneten Solldrehmoments durch einen Regler eines Mikrocomputers erhalten. Der Mikrocomputer weist eine Drehmomentregelung für einen SR-Motor auf der Grundlage der Rückkopplungskorrekturgröße und der Vorwärtskopplungskorrekturgröße an.

A driving arrangement for motor vehicles comprising an electromagnetic clutch and a control device therefor

... 948,064. Transistor switching circuits. ELEKTRO-MECHANIK. July 13, 1960 [March 23, 1960], No. 24417/60. Addition to 921,898. Heading H3T. [Also in Division F2] In the automatic clutch control of the parent Specification wherein a transducer 61 emits an electric signal which varies continuously with the speed of the driving engine and, above engine idling speed, varies the energization of a clutch winding 63, through a transistor amplifier 62, for smooth vehicle starting, automatic circuit means reduces clutch energization to prevent engine stalling at starting or low speeds due to low engine temperatures; adjustable automatic circuit means counteracts variation in transistor amplification due to variation in amplifier ambient temperature; adjustable circuit means effects variation in transistor amplification to suit the torque/ speed characteristics of various engines; and manually or automatically controlled circuit means prevents engine stalling at starting or low speeds due to low air ...

CIRCUIT FOR CONTROLLING A DRIVING DEVICE HAVING AN ELECTROMAGNETICALLY-ACTUATED CLUTCH

... 1,203,189. Clutch control. SINGER CO. 11 June, 1969 [17 June, 19681, No. 29497/69. Heading F2L. An electromagnetic clutch coil 10 is initially over-excited to provide rapid clutch engagement by discharging a storage capacitor 41 through the coil 10 when a silicon controlled rectifier (SCR) 25 is triggered on closing contacts 53, the capacitor having previously been charged by an A.C. voltage on busses 14, 15 when an SCR is triggered, and the clutch being maintained engaged, after the capacitor has discharged, by a D.C. voltage on busses 18, 20. As shown, the circuit controls the clutch coil 10 and a brake coil 11; contacts 55, a storage capacitor 46, and SCR's 31 and 45 controlling the brake. On closing contacts 55, a capacitor 50 discharges through a diode 52 and the contacts to provide a trigger pulse to the gates 56, 62 of SCR's 31, 40 respectively, conduction of SCR 40 ceasing when capacitor 41 is charged up to the A.C. voltage on busses 14, 15. The positive voltage on capacitor 46 ...

REPRODUCING APPARATUS

... 1285279 Oblique track recording and reproducing apparatus INTERNATIONAL BUSINESS MACHINES CORP 26 Nov 1970 [17 Dec 1969] 56355/70 Heading G5R Oblique tracks (Fig. 2) on a record are identified by data stored in a longitudinal address track A. In the system shown in Fig. 1, pulses J, K from a generating arrangement 15, 16, 17, 18, 19 periodically operate a switching arrangement F 11 , 64, C 1 , C 2 , C 3 to switch the outputs of rotary heads 1, 2 between an address read channel 20 and associated frame access circuitry C (not detailed), and a video read channel 66, the arrangement being such that whilst one head is traversing the address part A of the oblique tracks the other head is traversing the remaining video part of the oblique tracks. Address data is written on the record 14 by a skewed stationary head 39 which is fed from an address write channel 30 including a counter C31, an AND bank 37 1-n , a shift register R31, a clock 33, and a frequency shift keyer modulator 35. The J, K pulses ...

CONTROL APPARATUS FOR SCREWING DEVICES

POSITION CONTROLLER FOR CONTROLLING AN ELECTRIC MOTOR

A Torque Transmission Arrangement comprising an Electric Slip Coupling

... 1,168,041. Controlling clutches. SIEMENS A.G. 10 May, 1968 [10 May, 1967], No. 22428/68. Heading F2L. The energization of an electric slip clutch is controlled to maintain a desired output, speed. As shown, a diesel engine 1 drives a ship's propeller 2 through an electric slip clutch 4 and a gear 38. A machine telegraph 17 supplies a desired speed signal to a comparator 15 which receives a signal dependent on the actual output speed of the clutch from a tachometer 19. The signal from the comparator 15 is supplied to an amplifier 16 having a feedback 18, and the amplifier signal Md, which is a function of the difference between the actual and desired speeds, is fed to a multiplying device 34. Input and output signals supplied by tachometers 29, 19 are applied to a comparator 31 and the resulting signal is supplied to a function generator 32 which yields an output signal #(n1 - n2) the variation in which with variation in the input signal is approximately proportional to the reciprocal of ...

ELECTRIC MOTOR CONTROL SYSTEMS

... 1275122 Windscreen wipers TRICO PRODUCTS CORP 9 Sept 1969 [16 Sept 1968] 44446/69 Heading A4F [Also in Division H2] An electric motor 14 which drives windscreen wipers is associated with a cyclically actuated parking switch 54 responsive to motor rotation, and a manual switch 34 having "continuous run", "parking", and "intermittent dwell" positions. The motor is energized from battery 44 through contacts 102 for continuous operation. When contacts 104 are closed and contacts 102 are opened, the motor operates until contacts 60, 56 are disengaged and contacts 58, 56 are engaged. The armature of the motor is then short-circuited for dynamic braking so that the wipers are stopped in the desired parking position. Closure of contacts 70 for intermittent dwell charges capacitor 92 in timing circuit 110 through contacts 106, 56, 58 at a rate determined by the setting of resistor 108, until uni-junction transsistor 77 conducts to discharge the capacitor. Silicon controlled rectifier 78 is triggered ...

ELECTROMAGNETIC DRIVE TRANSMISSION

... 1376772 Mechanical power transmission by electrical devices KAWASAKI JUKOGYO KK 4 Aug 1972 [6 Aug 1971 15 Nov 1971] 36633/72 Heading H2H An arrangement for transmitting mechanical power from a driving machine 1 to a load 2 comprises an electromagnetic coupling 3, having a rotor 4 and a rotor 5, and a dynamo-electric machine 8, the coupling 3 and the machine 8 being provided with a plurality of windings certain of which are interconnected by means of a transformer 9 and a rectifier bridge 12 and one of the rotors 5 of the coupling 3 being physically combined with the motor 25 of the dynamoelectric machine 8. The rotor 4 of the coupling 3 is provided with a field winding 24 connected to slip rings 6, the rotor 5 provided with an armature winding 26 connected to slip rings 7, the rotor 25 of the dynamo-electric machine 8 provided with field winding 22 and the stator 21 provided with an armature winding 23. The armature windings 23, 26 are electrically interconnected by way of a phase interchanging ...

Improvements in electro-magnetic clutches

... 627,007. Electromagnetic clutches. GRATZMULLER, J. L. July 13, 1945, No. 18012. Convention date, Aug. 31, 1943. [Class 35] In a slip coupling one member carries a D.C. energized winding and the other a wound armature in which A.C. is induced and connected to an external circuit including an automatically adjustable device for absorbing the A.C. As shown, the A.C. from armature 9 is absorbed by the governor controlled resistances 13a-13d and the D.C. fed to the coils 4 on the other member may also be governor controlled. The armature 9 may also carry a short-circuited winding.

Position servo system

A servo system 10 (FIG. 1) for positioning a sighting mirror 11 connected to a pulley 16 comprises a drive motor 13 rigidly connected to a drive pulley 15 in turn coupled by a tensioned drive belt to the pulley 16. Angular position of the motor or pulley 15 is measured by sensor 18 and passed by way of phase advance network 19 and amplifier 21 to produce an error signal for the drive motor. The pulley 16 is outside of the servo loop and any oscillations induced in the tensioned belt at its resonant frequency, possibly originating from electrical noise in the servo loop, will be uncontrollable. To avoid such oscillation and retain a simple construction the belt tension is set (25) to a value producing a belt resonant frequency outside the operating bandwidth of the servo system and the feedback loop includes a notch filter 20 tuned to the belt resonant frequency which prevents electrical noise in the system from inducing along-axis oscillation of the drive belt and consequential position ...

MOTOR CONTROL WITH DIGITAL FEEDBACK.

A motor feedback control system is claimed which, in addition to a quantized digital position feedback value, uses a feedback signal which represents the error between the actual motor position and the quantized digital position. The error function is combined with the quantized digital position value to produce a digital position value with greater resolution. The combined value is differentiated to produce a velocity value for velocity feedback control of the motor.

Electric power steering system

A system having a motor operatively connected to a steering system for reducing the steering effort. The system is provided with a torsion torque sensor provided for detecting torsion torque generating in the steering system in steering operation. In response to the output signal of the torsion torque sensor, an assist signal is produced. The system has a dead zone for the output signal of the torsion torque sensor. Only when the output signal exceeds the dead zone, the assist signal is produced to operate the motor.

Device for operating an electric motor

Postion controller for an electric motor

A position controller for controlling an electric motor 1a in accordance with an input position command signal 15 comprises a simulating circuit 6a for modelling the mechanical characteristics of the motor and load which may be a robot arm. Output position and speed simulation signals theta a and omega a are used together with the input position command signal theta ms and detected actual motor position and speed signals theta m and omega m in interlinked control loops to develop torque signals gamma 1, gamma 2 and gamma 3 for control of motor current. The simulator uses two integration stages. In an alternative embodiment (see e.g. fig 24) simulated position, speed and torque signals are developed from the input position command signal. The position controller has high-speed response characteristics, is capable of suppressing mechanical vibrations and maintains a constant response frequency even if the moment of the load varies. ...

Powered sliding device for vehicle sliding door

A powered sliding device for a vehicle sliding door comprises a wire drum 10 rotated by a motor, a wire cable (11,12) provided between the wire drum 10 and the sliding door (5), an optical sensor 84,85 for outputting a detecting signal when the wire drum 10 rotates, a controller (87) for calculating from the detecting signal at least one of a rotational speed of the wire drum, a rotational amount of the wire drum and a rotational direction of the wire drum, a latch unit (67) provided in the sliding door and engageable with a striker (71), and a power supply switch (86) for supplying electric power to the optical sensor 84. The power supply switch (86) stops supplying the power to the optical sensor 84 when the latch unit engages the striker at the door closed position, thus conserving battery power.

Controller for motor power steering system

A controller for motor power steering system in which a motor for providing a steering mechanism with a steering assist force is controlled based on a steering assist command value operated based on a steering torque generated in a steering shaft and the current value of the motor in order to enhance the steering performance by designing the mechanical system and the control system to match a desired complementary sensitivity function thereby attaining a stabilized comfortable steering feeling. The complementary sensitivity function for frequency is set to approach 1 in a band where a disturbance to be suppressed is present and to approach 0 in a band where a disturbance to be transmitted is present.

Screw compressor

Actuator and position-detecting method therefor

In an actuator, an electric power supply to a position-detecting detector for an object to be driven can be carried out in a timely manner during a power failure to thereby suppress an electric power consumption in the position-detecting detector, whereby duration time of a power-failure compensation battery can be prolonged, and a variety of detectors can be selected and utilized without limitation in accordance with a use environment and usefulness. During the power failure, a switching means 40 establishes a linking state in which an input shaft 11 of a reduction mechanism 10 and a manual inputting means 30 are linked to each other. When the linking state is detected by a detecting means, an electric power is fed from a battery 80 to a rotation detector by a control section 70 , so that the control section 70 can obtain a displacement of the object to be driven, based on a signal output from the rotation detector. In a state in which the input shaft 11 of the reduction mechanism 10 can be manually rotated, the electric power is fed to the rotation detector. Thus, a useless consumption of the electric power of the battery 80 can be suppressed, and it is possible to suitably obtain the displacement of the object to be driven without an interruption even if the power failure happens.

FEEDBACK CONTROL DEVICE

Motor control device includes a controller controlling a motor (a calculator controller and an electric current controller), and a detector (an electric current loop) detecting an electric current of the motor and returning the detected electric current to the controller. The electric current loop includes a first detection system, a second detection system, and an electric current calculator which sums output signals from each system. Each detection system includes a sensor detecting the electric current of the motor, and a weight adjuster outputting to the electric current calculator, a detection electric current value from each sensor multiplied by a weight coefficient. 1. A feedback control device comprising:a controller configured to control a motor; anda detector configured to detect an operation status of the motor and returning the status to the controller, the detector comprising a plurality of detection systems and a calculator summing output signals from the detection systems, a sensor configured to detect the operation status of the motor; and', 'an adjuster configured to output to the calculator, the output signal from the sensor multiplied by a weight coefficient., 'wherein each detection system of the plurality of detection systems comprises2. The feedback control device according to claim 1 , wherein:each adjuster is configured to use the output signal from any of the sensors as a common reference signal, andwhen the reference signal changes from a lower limit value to an upper limit value defined in advance, the weight coefficient is defined so as to gradually increase or decrease.3. The feedback control device according to claim 2 , wherein:the plurality of detection systems include a first detection system and a second detection system,the first detection system includes a first sensor, the first sensor having a higher detection accuracy than that of the sensor of the second detection system,the second detection system includes a second sensor, ...

MOTOR CONTROLLER AND INDUSTRIAL MACHINE

A motor controller includes: an error suppression compensation unit that outputs an error suppression signal for driving the motor such that a difference between the position command signal and a signal based on the motor position signal equals zero; an acceleration extraction unit that outputs an acceleration component of a natural frequency of a stand from a stand vibration signal; an acceleration compensation unit that outputs a proportional compensation signal obtained by multiplying the stand acceleration signal by a proportional gain; a machine end correction unit that outputs a machine end correction signal, and decreases an amplitude of vibration at the machine end relative position; and an addition unit that outputs a signal obtained by adding the machine end correction signal to the error suppression signal. 1: A motor controller that controls a machine end relative position on the basis of a position command signal that determines a position of a mover of a motor and also on the basis of a motor position signal that is information on a motor position that is a relative position between a stator and the mover of the motor ,the machine end relative position being a relative position between a work object mechanically connected to the stator and a part of a working machine mechanically connected to the mover in order to operate on the work object, the controller comprising:an error suppression compensation unit to output an error suppression signal that drives the motor such that a difference, between the position command signal and a signal based on the motor position signal, equals zero;an acceleration extraction unit to output, as a stand acceleration signal, an acceleration component of a natural frequency of a stand from a stand vibration signal that is information on vibration of the stand on which the stator of the motor is set up;an acceleration compensation unit to output a proportional compensation signal obtained by multiplying the stand ...

VEHICLE

A vehicle, in particular a vehicle to be propelled by muscular energy. The vehicle includes devices for compensating for forces acting on the vehicle in or against the direction of travel as a result of deviations from defined operating conditions. The vehicle advantageously maintains an unchanged driving behavior corresponding to the operating conditions even when there are deviations from the operating conditions, 111-. (canceled)12. A vehicle , comprising devices for compensating for forces which act on the vehicle in or against a direction of travel as a result of deviation from defined operating conditions ,13. The vehicle according to claim 12 , wherein the vehicle is operable by muscle power.14. The vehicle according to claim 12 , wherein the compensation device comprise an electrical machine which generates compensating forces.15. The vehicle according to claim 14 , wherein the electrical machine is operable as a motor that generates a compensating force in the direction of travel and as a generator that generates a compensating force against the direction of travel.16. The vehicle according to claim 14 , wherein the compensation devices comprise means for determining a magnitude of the forces to be compensated for in real time and for automatically setting compensating forces based on the determined magnitude claim 14 ,.17. The vehicle according to claim 12 , wherein the forces are downhill slope forces or/and rolling friction forces.18. The vehicle according to claim 12 , wherein movements of the vehicle in a horizontal plane or/and movement of the vehicle in an unloaded state is/are defined as an operating condition. (New) The vehicle according to claim 12 , wherein the means for determining the magnitude of forces which are to be compensated for include a position sensor for determining inclination of the vehicle claim 12 ,20. The vehicle according to claim 16 , wherein the means for determining the magnitude of forces which are to be compensated for ...

TORQUE CONTROL METHOD FOR AN ELECTRIC MOTOR

A method for controlling an electric motor that involving implementing a regulation loop regulating an induced current flowing in an induced circuit of a rotor of the motor, the regulation loop having, as the input signal, a current setpoint, as the return signal, a signal representative of the induced current, and as the output signal, a voltage control of the motor. The regulation loop includes a correction unit formed from an integral proportional corrector and a delay compensator. 1. A method for controlling an electric motor comprising the implementation of a regulation loop for an induced current circulating in an armature circuit of a rotor of the motor , the regulation loop having , for input signal , a current set point , for return signal , a signal representative of the induced current , and , for output signal , a voltage control of the motor , the method being characterized in that the regulation loop comprises a corrector block formed by a proportional integral corrector and a lag compensator.2. The control method as claimed in claim 1 , in which the lag compensator has a first order transfer function of which the gain at the low frequencies is greater than the gain at the high frequencies.3. The control method as claimed in claim 1 , in which the regulation loop further comprises an anticipation filter intended to add to an output signal of the corrector block the input signal of the regulation loop exhibiting a certain delay and multiplied by a certain gain.4. The control method as claimed in claim 3 , in which the anticipation filter is a second order filter.5. The control method as claimed in claim 1 , in which the regulation loop comprises an anti-windup device intended to minimize the effects of a saturation of the voltage control.6. The control method as claimed in claim 5 , in which the anti-windup device comprises a first order filter. The invention relates to the field of electric motor torque control.The rotor of a direct current. motor ...

PARAMETER DETERMINATION SUPPORTING DEVICE

To determine a driving parameter for driving a motor having an unknown circuit constant in a simple way and to shorten time required for the determination. A parameter determination supporting device comprises: initial parameter determination means that determines an initial parameter for a trial run based on specification information about a motor driver and output specification information about a motor; program generation means that generates a trial run program based on the output specification information about the motor, the trial run program being used in a trial run for acquiring data necessary for adjusting a parameter for determining an output from the motor; automatic measurement means that automatically measures operation information determined by driving the motor by applying the initial parameter and following the trial run program; estimation means that estimates the circuit constant of the motor based on the operation information; and calculation means that calculates an optimum parameter conforming to the output specification of the motor based on the circuit constant. 2. The parameter determination supporting device according to claim 1 , further comprising: detection means that detects the specification information; andinput means for input of the output specification information by an operator, whereinthe acquisition means acquires the specification information from the detection means, and acquires the output specification information from the input means.3. The parameter determination supporting device according to claim 1 , wherein the specification information includes at least one of the allowable current value of the motor driver and a frequency available for driving the motor driver.4. The parameter determination supporting device according to claim 1 , wherein the output specification information includes at least one of the rated output and the base speed of the motor.5. The parameter determination supporting device according to claim 1 ...

MACHINE TOOL AND PARAMETER ADJUSTMENT METHOD THEREFOR

A machine tool comprises: a servomotor feeding a workpiece or a tool; a motor control section controlling the servomotor; and a processor connected to the motor control section, in a parameter adjustment mode while rotating a load by the servomotor with a given speed command issued to the motor control section under a condition where torque is limited, the processor calculating load inertia based on the torque and an angular acceleration of the servomotor that is obtained based on an output from the servomotor, calculating a parameter based on the load inertia, and adjusting a control parameter set to the motor control section based on the parameter. 1. A machine tool comprising:a servomotor feeding a workpiece or a tool;a motor control section controlling the servomotor; anda processor connected to the motor control section,in a parameter adjustment mode while rotating a load by the servomotor with a given speed command issued to the motor control section under a condition where torque is limited, the processor calculating load inertia based on the torque and an angular acceleration of the servomotor that is obtained based on an output from the servomotor, calculating a parameter based on the load inertia, and adjusting a control parameter set to the motor control section based on the parameter.2. The machine tool as defined in claim 1 , the processor adjusting the control parameter of the motor control section based on a value as a result of comparison between a basic parameter in a state with a reference load different from the load and the calculated parameter.3. The machine tool as defined in claim 2 , the processor calculating a parameter Pbased on P=P×(1+C×I/I) claim 2 , where Idenotes reference inertia in the state with the reference load claim 2 , Pdenotes the basic parameter corresponding to the reference inertia I claim 2 , Idenotes the load inertia claim 2 , Pdenotes the parameter corresponding to the load inertia I claim 2 , and C denotes a correction ...

DRIVE APPARATUS

Plug having common specifications are arranged on the side surfaces of each of the devices of different types included in the drive apparatus that controls an electric motor, and the plugs are positioned such that the side surfaces of the devices are in close contact with each other by connecting the plugs and the devices of different types are integrated. 1. A drive apparatus that controls an electric motor and includes a first device and a second device , the first device having a surface on which a first connector is arranged , the second device having a surface on which a second connector , which has a same standard as the first connector , is arranged and having a function that is different from a function of the first device , whereinthe first connector of the first device is connectable to the second connector of the second device, andan arrangement position of the first connector on the surface of the first device and an arrangement position of the second connector on the surface of the second device correspond to each other.2. The drive apparatus according to claim 1 , wherein the surface of the first device on which the first connector is arranged and the surface of the second device on which the second connector is arranged are in close contact with each other.3. A drive apparatus that controls an electric motor and includes a first device and a second device claim 1 , the first device having a surface on which a first connector is arranged claim 1 , the second device having a surface on which a second connector claim 1 , which has a same standard as the first connector claim 1 , is arranged and having a function that is different from a function of the first device claim 1 , whereinthe first connector of the first device is connectable to the second connector of the second device, andthe first device includes a cable connection terminal adapted to a connection with another device by a cable.4. The drive apparatus according to claim 3 , wherein the first ...

DENTAL DEVICE WITH LOAD-RESPONSIVE MOTOR CONTROL

A motor-driven dental device has a motor control that is responsive to a load placed upon the motor. More specifically, the invention relates to a dental device having motor that drives a tool, wherein the tool is activated or otherwise controlled in response to a load placed upon the motor through the tool, such as by touching the tool to a surface. The tool may also be controlled by the sustenance, over a predetermined time period, of an increase or decrease in motor current beyond a predetermined hysteresis current threshold. The motor may be an electric motor, a rotary electric motor, and air driven motor, an ultrasonic device or the like. 1. A motor driven dental handpiece having a motor control for driving a motor comprising:an electric motor;a tool engagably connected to said electric motor,an outer sheath; andan inner module wholly or partially covered by the outer sheath and detachably engaging with said tool;wherein the handpiece is constructed such that a load applied to the electric motor corresponds to a controlled output goal of the tool,wherein a controlled output of the motor increases or decreases to said controlled output goal in response to said load,wherein said load is an increasing or a decreasing load, andwherein the controlled output is increased for an increasing load and decreased for a decreasing load.2. The handpiece according to claim 1 ,wherein the controlled output is a speed of the tool and the load is a torque applied to the electric motor.3. The handpiece according to claim 1 ,wherein the handpiece is electrically or pneumatically powered.4. The handpiece according to claim 1 ,wherein the handpiece is rotary, reciprocating or oscillating.5. The handpiece according to claim 2 ,wherein the speed varies in steps or continuously or proportionally to the torque.6. The handpiece according to claim 1 ,wherein the handpiece is waterproof.7. A method of controlling a motor driven dental handpiece having a motor control for driving a motor ...

Noise filtering method for motor, recording medium thereof and motor control circuit

The invention provides a noise filtering method for a motor. The motor rotates according to an operating voltage. The noise filtering method includes: setting an inspection period and a minimum threshold. The noise filtering method further includes: generating a pulse signal according to the operating voltage, determining whether a time corresponding to each sub-pulse signal in the pulse signal meets the inspection period, and determining whether a pulse width corresponding to each sub-pulse signal is equal to or greater than the minimum threshold. A recording medium storing a program code corresponding to the method, and a motor control circuit for executing the program code are also provided.

OPENING AND CLOSING BODY CONTROL APPARATUS FOR VEHICLE

An opening and closing body control apparatus for a vehicle includes an assist control portion detecting an operation of an opening and closing body configured to be provided at the vehicle, controlling voltage applied to a motor serving as a drive source, and applying a drive force to the opening and closing body in a direction in which the operation of the opening and closing body is assisted. The assist control portion applies an assist voltage and an offset voltage alternately to the motor to operate an assist control for applying the drive force to the opening and closing body, the assist voltage for rotating the motor at a rotation speed which corresponds to an operation speed of the opening and closing body, the offset voltage which is lower than the assist voltage. 1. An opening and closing body control apparatus for a vehicle , comprising: detecting an operation of an opening and closing body configured to be provided at the vehicle;', 'controlling voltage applied to a motor serving as a drive source; and', 'applying a drive force to the opening and closing body in a direction in which the operation of the opening and closing body is assisted; wherein, 'an assist control portion'}the assist control portion applies an assist voltage and an offset voltage alternately to the motor to operate an assist control for applying the drive force to the opening and closing body, the assist voltage for rotating the motor at a rotation speed which corresponds to an operation speed of the opening and closing body, the offset voltage which is lower than the assist voltage.2. The opening and closing body control apparatus for the vehicle according to claim 1 , wherein an application time of the offset voltage is shorter than an application time of the assist voltage.3. The opening and closing body control apparatus for the vehicle according to further comprising an assist stop portion stopping an operation of the assist control when detecting a decrease of the operation ...

FUEL INJECTION VALVE CONTROL DEVICE AND FUEL INJECTION VALVE CONTROL METHOD

An increase control unit causes to apply a first voltage to a coil of a fuel injection valve to increase a driving current of the coil to a peak value. A holding control unit stops application of the first voltage, when the driving current increases to the peak value, and subsequently switches between a first holding control and a second holding control. The first holding control is to apply a second voltage lower than the first voltage to the coil based on at least one of the peak value, the second voltage, and a fuel pressure, to hold the driving current at a target current. The second holding control is to apply the first voltage to the coil to hold the driving current at the target current. The holding control unit performs one of the first holding control and the second holding control which is switched. 1. A fuel injection valve control device configured to drive a fuel injection valve , which includes a valve body to open/close an injection hole to inject fuel and a coil to act a force in a direction to open the injection hole of the valve body on energization , with a driving circuit that is configured to switch between a first voltage and a second voltage lower than the first voltage and to apply one of the first voltage and the second voltage which is switched to the coil , the fuel injection valve control device comprising:an increase control unit configured to apply the first voltage with the driving circuit to the coil to increase a driving current that is an electric current to flow through the coil to a peak value; and to stop application of the first voltage with the driving circuit when the increase control unit increases the driving current to the peak value,', a first holding control to apply the second voltage with the driving circuit to the coil based on the peak value to hold the driving current at a target current, and', 'a second holding control to apply the first voltage with the driving circuit to the coil to hold the driving current at the ...

ELECTRICAL MACHINE

An axial flux electrical machine comprises a first flux generating assembly, a second flux generating assembly, a shaft and a speed controller. The shaft has an axis of rotation. Each of the first flux generating assembly and the second flux generating assembly is rotationally located on the shaft in axial juxtaposition to one another, with the first flux generating assembly being axially separated from the second flux generating assembly by a separation distance. The speed controller is configured to modify a magnetic field generated by either of the first flux generating assembly and the second flux generating assembly so as to control a rotational speed of the electrical machine. 1. An axial flux electrical machine comprising:a first flux generating assembly;a second flux generating assembly;a shaft having an axis of rotation; anda speed controller,wherein each of the first flux generating assembly and the second flux generating assembly is rotationally located on the shaft in axial juxtaposition to one another, the first flux generating assembly being axially separated from the second flux generating assembly by a separation distance, and the speed controller being configured to modify a magnetic field generated by either of the first flux generating assembly and the second flux generating assembly so as to control a rotational speed of the electrical machine.2. The axial flux electrical machine as claimed in claim 1 , wherein the first flux generating assembly comprises one or more winding portions and the second flux generating assembly comprises one or more magnetic portions claim 1 , the or each winding portion corresponding to a respective one of the or each magnetic portion.3. The axial flux electrical machine as claimed in claim 1 , wherein the first flux generating assembly comprises a plurality of first flux generating portions claim 1 , and the second flux generating assembly comprises a plurality of second flux generating portions claim 1 , the ...

ELECTRIC-MOTOR CONTROL APPARATUS

An electric-motor control apparatus includes: a command generation unit; a drive detector; a drive-current detection unit; a current-control computation unit; a steady-state-load calculation unit; a first steady-state-load reference-value storage unit; and a tension-variation analysis unit. The command generation unit outputs a drive command signal of an electric motor; the drive detector outputs a drive detection signal of the electric motor; the control computation unit receives the drive detection signal and the drive command signal and outputs a current command value; the drive-current detection unit outputs a drive-current detection value; the current-control computation unit outputs the drive current to the electric motor; and the steady-state-load calculation unit outputs a steady-state-load calculation value. The first steady-state-load reference-value storage unit stores a first steady-state-load reference value; and the tension-variation analysis unit outputs a tension-variation analysis value. 1. An electric-motor control apparatus to control an electric motor that is a driving source in a driver that transfers torque from the driving source to a load by using a belt , the apparatus comprising:a command generator to output a drive command signal that indicates a desired value of an angle, an angular velocity, or an angular acceleration of the electric motor;a drive detector to output a drive detection signal that indicates a value of the angle, the angular velocity, or the angular acceleration of the electric motor;a control computer to receive the drive detection signal and the drive command signal and output a current command value that is a desired value of a drive current to be supplied to the electric motor;a drive-current detector to output a drive-current detection value that is a value of the drive current;a current-control computer to receive the current command value and the drive-current detection value and output the drive current to the ...

ELECTRIC MOTOR APPARATUS

An apparatus for controlling an electric motor having a controller, a torque demand limit generator, and a drive stage. The controller may be arranged to receive as an input a torque demand signal indicative of the amount of torque demanded from the motor and to produce as an output a set of motor current demand signals. The drive stage may receive the motor current demand signals and is arranged to cause currents to flow in each phase of the motor as required to meet the demanded torque. The torque demand limit generator may be arranged to output a torque demand limit signal indicative of a torque demand limit above which the battery current would exceed one or more limits. 1. An apparatus for controlling an electric motor , the motor and apparatus being supplied by a battery source , the electric circuit comprising:a controller arranged to receive as an input a torque demand signal indicative of the amount of torque demanded from the motor and to produce as an output a set of motor current demand signals; anda drive stage which receives the motor current demand signals and is arranged to cause currents to flow in each phase of the motor as required to meet the demanded torque;wherein the apparatus further comprises a torque demand limit generator which is arranged to output a torque demand limit signal indicative of a torque demand limit above which the battery current would exceed one or more limits.2. The apparatus as defined in further comprising a torque demand generator which generates the torque demand signal indicative of the amount of torque demanded from the motor.3. The apparatus as defined in claim 2 , wherein the torque demand generator generates a torque demand signal that has a value that is dependent on the amount of assistance torque demanded from the motor and the torque demand limit signal such that the value of the torque demand signal does not exceed the limit value.4. The apparatus as defined in claim 2 , wherein the torque demand generator ...

ELECTRIC COMPRESSOR AND METHOD FOR CONTROLLING SAME

An electric compressor and a method of controlling the same, the electric compressor including a detection unit for detecting a phase of refrigerant in the electric compressor, a connection unit wound at a position adjacent to a passage of a housing for movement of a refrigerant in the electric compressor, and a control unit for performing control according to the phase of refrigerant by differently controlling power applied to the connection unit in response to data detected by the detection unit. The method including aligning a position of a rotor after an electric compressor is turned on, determining whether a refrigerant is in liquid phase or in gas phase, preheating the refrigerant by applying power to the electric compressor according to the phase of refrigerant, and controlling the electric compressor such that the electric compressor is normally operated after the refrigerant is preheated. 123-. (canceled)24. An electric compressor comprising:a detection unit detecting a phase of a refrigerant in the electric compressor;a connection unit wound at a position adjacent a passage of a housing of the electric compressor, the passage conveying the refrigerant in the electric compressor; anda control unit controlling the connection unit according to the phase of the refrigerant by controlling a power applied to the connection unit in response to data received by the detection unit.25. The electric compressor according to claim 24 , the detection unit further comprising a temperature sensor detecting a temperature in the electric compressor.26. The electric compressor according to claim 24 , the detection unit further comprising a pressure sensor detecting a pressure in the electric compressor.27. The electric compressor according to claim 24 , wherein the connection unit is a three-phase coil wound around a stator disposed in the electric compressor claim 24 , the connection unit further comprising:a first connection wound on an outermost side of the stator;a ...

Gas-cleaning apparatus

A gas-cleaning apparatus in which the speed and power level of an induced draft fan are jointly regulated to maintain a constant gas volume flow rate through a venturi scrubber connected in series with the fan, and to thereby maintain a substantially constant pressure drop across the venturi scrubber for improved gas cleaning action therein.

电动机的转矩脉动校正装置以及校正方法、电梯的控制装置

提供能够以简单的结构对转矩脉动进行校正的电动机的转矩脉动校正装置、电动机的转矩脉动校正方法、电梯的控制装置。对电动机的旋转速度的特定频率成分进行频率分析，根据频率分析结果估计电动机的转矩脉动。这时，根据在多次电流条件不同的条件下得到的频率分析结果，将转矩脉动的振幅或相位作为电流的函数进行估计。根据得到的函数对转矩脉动进行校正，因此能够以简单的结构对电动机的转矩脉动进行校正。

Torque control apparatus for rotating motor machine

내용 없음. No content.

SET TO MUTE CABLES WITH A ROTATING SYSTEM

Drive system, in particular for a motor vehicle and method for controlling the idle speed of an internal combustion engine

Actuator and position detection method

본 발명은, 구동 대상물의 위치 검출용의 검출기에 대한 정전(停電) 시의 전력 공급을 적절한 타이밍에서 실행하여, 검출기에 의한 전력 소비를 억제하여 배터리의 지속 시간을 연장시킬 수 있는 동시에, 각종 검출기를 사용 환경이나 용도에 따라 제한없이 선택하여 사용할 수 있는 액추에이터이다. 정전 시에, 전환 수단(40)이 감속 기구(10)의 입력축(11)과 수동 입력 수단(30)을 연동하는 상태로 이행시켜, 이 연동 상태를 검출 수단이 검출하면, 제어부(70)가 회전 검출기에 배터리(80)로부터의 전력을 공급하고, 제어부(70)에 의해 회전 검출기로부터의 출력 신호에 기초하여 구동 대상물의 변위를 취득 가능해지므로, 감속 기구(10)의 입력축(11)을 수동 회전시키는 상태에서 회전 검출기로의 전력 공급을 행하여, 배터리(80) 전력의 불필요한 소비가 억제되고, 또한 정전 시라도 구동 대상물의 변위를 중단하지 않고 적절히 취득할 수 있다. According to the present invention, power supply at the time of power failure to the detector for detecting the position of a driven object is performed at an appropriate timing, power consumption by the detector is suppressed to prolong the duration of the battery, Is an actuator that can be used without restriction depending on the environment or use. The switching means 40 shifts the state in which the input shaft 11 of the deceleration mechanism 10 and the manual input means 30 cooperate with each other at the time of a power failure and the control means 70 The input shaft 11 of the deceleration mechanism 10 can be manually driven by supplying power from the battery 80 to the rotation detector and acquiring the displacement of the driven object based on the output signal from the rotation detector by the control unit 70. [ Unnecessary consumption of the electric power of the battery 80 is suppressed by supplying electric power to the rotation detector in a state of rotating, and it is possible to appropriately acquire the electric power without stopping the displacement of the driven object even in the case of a static electricity.

Apparatus for detecting and suppressing resonance in servo system using a plurality of fixed notch filter and method thereof

본 발명의 일 실시예는 서보 제어기에서 발생된 전류 명령으로부터 서보 시스템의 공진 발생 및 억제 여부와 발생한 공진의 크기를 감지하는 공진 감지기, 상기 전류 명령으로부터 발생한 공진의 주파수를 실시간으로 추정하는 주파수 추정기, 미리 알려진 제1 공진을 억제하기 위해 상기 전류 명령을 필터링하는 고정 노치 필터부, 상기 고정 노치 필터부가 사용중인 가운데 제 2 공진이 감지되면, 상기 제2 공진의 크기와 상기 제1 공진의 크기를 비교하는 공진 비교기 및 상기 제2 공진의 크기가 상기 제1 공진의 크기보다 큰 경우, 상기 제2 공진이 억제되도록 상기 고정 노치 필터부의 노치 주파수를 상기 제2 공진의 주파수로 변경하는 필터 설정기를 포함하는 복수개의 고정 노치 필터를 이용한 서보 시스템의 공진 감지 및 억제 장치 및 이를 이용한 방법을 개시한다. According to an embodiment of the present invention, there is provided a servo system including a resonance detector for detecting resonance occurrence and suppression of a resonance of a servo system from a current command generated in a servo controller, a frequency estimator for estimating a resonance frequency generated from the current command in real time, A fixed notch filter unit for filtering the current command to suppress a first known resonance; and a second notch filter unit for comparing the magnitude of the second resonance and the magnitude of the first resonance when a second resonance is detected while the fixed notch filter unit is in use And a filter setting unit for changing the notch frequency of the fixed notch filter unit to the frequency of the second resonance so that the second resonance is suppressed when the magnitude of the second resonance is larger than the magnitude of the first resonance An apparatus for detecting and suppressing resonance of a servo system using a plurality of fixed notch filters and a system using the same It discloses a.

Motor control device

외부 입력의 기준속도(ωb)와 비율 게인(α)으로부터 지령속도(ωr)를 출력하는 지령속도 연산수단(101)과, 지령속도(ωr)를 입력으로 하여 지령속도(ωr)에 추종하도록 규범속도(ωa)를 연산하여 출력하는 규범속도 생성수단(108)과, 규범속도(ωa)와 모터(3)의 속도(ωm)와의 차이의 속도편차(ωe)와 속도편차 보정값(ωec)으로부터 제어편차(e)를 출력하는 제어편차 연산수단(103)과, 제어편차(e)가 저감하도록 제어연산에 의해 보상토크(τm)를 출력하는 속도제어수단(104)과, 적어도 보상토크(τm)에 근거하여 속도편차 보정값(ωec)을 연산하는 속도편차 보정수단(105)과, 적어도 보상토크(τm)를 입력으로 하여 모터(3)의 토크의 목표값인 지령토크(τr)를 출력하는 지령토크 연산수단(107)과, 속도편차(ωe)에 근거하여 비율 게인(α)을 연산하는 비율연산수단(102)을 구비한다. The command speed calculation means 101 outputs the command speed ωr from the reference speed ωb and the ratio gain α of the external input, and the command speed ωr is input to follow the command speed ωr. From the normative speed generating means 108 for calculating and outputting the speed omega a, and the speed deviation omega and the speed deviation correction value oec of the difference between the nominal speed omega a and the speed omega m of the motor 3. The control deviation calculating means 103 for outputting the control deviation e, the speed control means 104 for outputting the compensation torque? M by the control operation so as to reduce the control deviation e, and at least the compensation torque? M. Speed deviation correction means 105 which calculates the speed deviation correction value? Ec based on?) And command torque? R which is a target value of torque of the motor 3 is output by inputting at least the compensation torque? M. Command torque calculating means 107, and ratio calculating means 102 for calculating the ratio gain? Based on the speed deviation? E.

Electromechanical drive system with variable rotation rate

Speed controller of motor

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

No load operating device of electric vehicle

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Servo controlling method for compensating frictional torque

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method and System for Estimating Inertia of 2-Mass System During Speed Control

A speed control system for controlling a two-mass system having a motor and a load connected through an elastic shaft, comprising: a speed control amplifier for amplifying a difference between a preset speed and a motor speed; a load torque estimate observer for obtaining a load torque estimate; a model machine control system for outputting a load torque command upon receiving the sum of the output of the speed control amplifier and the load torque estimate, the speed control system controlling the two-mass system according to the load torque command; means for outputting an observer speed estimate from a first integral factor which has a model machine time constant of the sum of a machine time constant of the motor and a machine time constant of the load in such a manner so as to input a difference between the load torque estimate and the load torque equivalent value into the first integral factor; means for determining an inertia of the two-mass system by dividing the output from the first integral factor by the motor speed; and means for controlling the model machine control system and the speed control amplifier based on the inertia of the two-mass system.

MIXED FRICTION CLUTCH AND EDDY CURRENT AND METHOD FOR CONTROLLING THE SAME

Control circuit for centrifuge with worm ejector drum - has reduction gear pulley acting as electrical current generator

A centrifuge for sepg. fluid and solid matter, embraces an outer and an inner drum, the inner drum being laid out as a worm conveyor. The centrifuge is further equipped with a control system for maintaining by means of proportional action, a constant adjusted difference in the speed of revolution between the outer and the inner drum. The control system can also effect by the alteration of the required coupled, a corrective controlling action alongside the proportional controlling action. A pulley coupled to the one drum acts as an electrical generating machine and the speed of revolution of the generator is converted by a tachogenerator into a signal for the proportional regulation of the speed of revolution. After comparison with the adjusted value of the difference in the number of revolutions, the signal provides a target value for the current from the generator and a signal parallel with the generator current is used for the correcting regulating action. The centrifuge is fitted with a cam disc reduction gear between the outer and the inner drum. The generator is coupled to the pulley of the reduction gear driving the inner drum, and means are provided so that when the number of revolutions of the inner drum falls below an adjusted value, a target value of the current from the generator is regulated proportionally or integrally from a signal parallel to the number of revolutions of the generator and a signal parallel to the current from the generator, in such a way that the generator brakes the pulley coupled to the inner drum. Device makes it possible to adjust the speeds of revolution of the inner and outer drum within close limits and maintain these constantly so that the product is as dry as possible. There is no pendulum swinging in the variation of the speeds.

Advanced control device for kneader

Control mechanism for electrical couplings

Combined friction and eddy current clutch and its control method

Combined clutch especially for motor vehicle, characterised in that it comprises an eddy current coupler and a friction clutch with magnetic clamping, which are associated with means for producing an excitation current I, the said excitation current I being controlled by a control assembly 13 so as to pass the device from a sliding state transmitting the torque electrodynamically to a non-sliding state with torque transmission by magnetic clamping of the friction pieces, so as to respond to the operating conditions of the transmission of the vehicle.

Electromagnetically adjustable speed transmission

Improvements to generators

Device for the progressive establishment of an electric current, in particular for electromagnetic clutches

Method and device for adjusting the speed and torque of an induction motor

Speed variator-inverter device

METHOD FOR MITIGATING OSCILLATIONS IN A ROTATING SYSTEM

L'INVENTION CONCERNE UN PROCEDE POUR ATTENUER LES OSCILLATIONS D'UN SYSTEME ROTATIF. LE PROCEDE CONSISTE A MESURER LES ACCELERATIONS ET LES DECELERATIONS DU SYSTEME ROTATIF 10, 11, 12. SELON L'ACCELERATION, UN FREIN ELECTROMAGNETIQUE 13 EST APPLIQUE AU SYSTEME ROTATIF. EN CAS D'UNE DECELERATION, DE L'ENERGIE ROTATOIRE, PROVENANT D'UNE SOURCE 16, EST FOURNIE AU SYSTEME. DOMAINE D'APPLICATION: REGULATION DE LA VITESSE DE ROTATION D'UNE GENERATRICE SYNCHRONE ENTRAINEE PAR UNE TURBINE EOLIENNE.

Torque device without torsion

Speed slaving device for electromagnetic transmission - has one or more self-induction coupling elements

Speed control for industrial sewing machine - uses constant speed electric motor with controlled electromagnet biassing drive wheel against friction pads on motor flywheel

The system is for speed control and positioning of variable speed machines driven by electric motors. Including constant speed electric motor (1) driving a flywheel (2) fitted with friction. The variable speed machine has a drive shaft. This drive shaft (4) is coaxial to the shaft of the flywheel. The system includes a rotational speed detector for the driven machine and position detector for a part of the machine. The drive shaft supports a metallic disc (17) which is pulled by a spring (18) towards the friction pads (7). These friction pads (7) are fixed on the base of the control system. An electromagnet (9) attracts the metallic disc (17) towards the friction pads (3) on the flywheel (2). The control supplies variable voltage to the electromagnet which attracts the metallic disc (17) to control the speed of the driven shaft.

Apparatus and method for correcting torque pulsation of electric motor, control device for elevator

Device for adjusting the current or voltage at the terminals of an electrical device

Electro-mechanical constant speed drive system

Apparatus for rapidly energizing inductive windings

Patent FR1596498A

Control device of a direct current motor

Electronic servo-mechanism for automatic car washer - measures power needed to overcome friction when brushes touch car

Input circuit applies AC power and brush drive motor current to a multiplier and filter circuit to produce a voltage proportional to the phase shift induced by the motor. The System can be calibrated by closing the switch and comparing the voltage when the brushes are free-running with a calibration voltage, leaving the voltage in the memory when the switch is opened. When brushes touch the car, additional phase shift is induced, and the voltage rises producing a voltage at the output of an adding circuit. This operates a first control circuit. Subsequent control circuits are initiated by the preceding circuit.

ELECTRIC CURRENT GENERATOR DEVICE

L'invention concerne un dispositif générateur de courant électrique. Il comporte une génératrice et un dispositif d'entraînement à rapport variable qui permet de faire tourner la génératrice à une vitesse constante dans une large plage de vitesses d'un arbre d'entrée. Le dispositif de transmission comporte un train différentiel épicycloïdal dont la couronne extérieure est entraînée à une vitesse variable par des unités hydrauliques de manière à modifier le rapport de transmission. Les unités hydrauliques sont entraînées par l'arbre d'entrée et réagissent à un signal dont la fréquence représente la vitesse de la génératrice. L'invention s'applique notamment à la production d'un courant électrique triphasé à 400 Hertz dans un aéronef. The invention relates to a device for generating an electric current. It has a generator and a variable ratio drive device that allows the generator to be rotated at a constant speed over a wide range of speeds of an input shaft. The transmission device comprises an epicyclic differential train, the outer ring of which is driven at a variable speed by hydraulic units so as to modify the transmission ratio. The hydraulic units are driven by the input shaft and react to a signal whose frequency represents the speed of the generator. The invention applies in particular to the production of a three-phase electric current at 400 Hertz in an aircraft.

Constant frequency generator drive system

Power plant

ELECTRONIC CONTROL OF A PULLEY TRANSMISSION

Speed setting device for sewing machine

New three-phase electric motor with rotating field

Sewing machine

A digital speed control system for a sewing machine comprises a digital speed setting device (5) which responds to manual depression of a foot pedal by generating a digital position signal. A variable frequency divider (4) divides the frequency of speed related pulses so that its output frequency is an integral submultiple of the input frequency, which is variable as a function of the digital position signal. A period detector (6) senses the interval between pulses that occur successively at the output of the frequency divider and generates a binary data representing the sensed interval. The interval representing data is translated into a second period data in an arithmetic unit (8) according to a predetermined transfer function. A pulse generator (9) translates the second period data into a pulse for activating a magnetic clutch (11 a) or a magnetic brake (11b) depending on a sign of the second period data to accelerate or decelerate the sewing machine (1).

Autonomous torque generator of adjustable intensity

Advanced servo control device

Improvements in and relating to electric motor control systems

342,630. Grinding or disintegrating wood. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. -(Assignees of Rogers, H. W. ; 10, Parkwood Boulevard, Schenectady, New York, U.S.A.) May 27, 1930, No. 16318. Convention date, May 27, 1929. [Class 59.] A motor 22 feeding material to a grindstone 10 of a magazine pulp grinding machine, is controlled according to the load on the synchronous motor 12 driving the grindstone. The control device comprises a synchronous dynamometer 27 which determines the lag between the rotor and stator fields of the motor 12 and adjusts the field resistance 26 of the motor 22.

Patent FR1589126A

Electric control system

Safety circuit for shutting down electric motor drives in textile machines

Patent FR1583087A

Method and apparatus for electronic sensing of motor torque

Sewing machine

Constant speed mechanism

Motor control system and input/output device

A motor control system (1) includes: a mechanical apparatus configured to be driven by a motor (10); an encoder (30) configured to detect position information of the motor (10); a motor control apparatus (20) configured to control the motor (10); one or a plurality of sensors (501-506) configured to detect information relating to at least any one of the mechanical apparatus and the motor (10); and an input and output device (40) including a plurality of input-and-output connectors (#1-#8), wherein the encoder (30) and the input and output device (40) are configured to be connected to the motor control apparatus (20) through a same communication path, the sensor (501-506) is configured to be connected to the input-and-output connector (#1-#8) of the input and output device (40), the position information is configured to be transmitted from the encoder (30) to the motor control apparatus (20), and the information relating to at least any one of the mechanical apparatus and the motor (10) is configured to be transmitted from the sensor (501-506) to the motor control apparatus (20) through the input and output device (40) .

Variable speed drive device with a clutch motor

Actuator and method for detecting position using same

Starter for load

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method of operating presses and the like.

Method for attenuating oscillations of a rotating system

Abstract: A method for attenuating oscillations of a rotating system. Acceleration and deceleration of the system are sensed. In dependence on an acceleration, an eddy--current brake is applied to the rotating system. In dependence on a deceleration, rotational energy is supplied to the system from a rotational energy source.

Rotational speed sensing modulator

Method and system for estimating inertia of 2-mass system during speed control

A speed control system for controlling a two-mass system having a motor and a load connected through an elastic shaft, comprising: a speed control amplifier for amplifying a difference between a preset speed and a motor speed; a load torque estimate observer for obtaining a load torque estimate; a model machine control system for outputting a load torque command upon receiving the sum of the output of the speed control amplifier and the load torque estimate, the speed control system controlling the two-mass system according to the load torque command; means for outputting an observer speed estimate from a first integral factor which has a model machine time constant of the sum of a machine time constant of the motor and a machine time constant of the load in such a manner so as to input a difference between the load torque estimate and the load torque equivalent value into the first integral factor; means for determining an inertia of the two-mass system by dividing the output from the first integral factor by the motor speed; and means for controlling the model machine control system and the speed control amplifier based on the inertia of the two-mass system.

Machine work sensor

An improved work sensor circuit for single or multiphase electric motors wherein a change in work load produces a test voltage, thereby providing a convenient and sensitive way of measuring load and load changes. According to the invention, a vectorial combination of voltage signals representing motor current and motor voltage is produced in a first circuit portion to provide a test voltage which is operated on by additional circuitry to indicate changes in motor load, the rate of change, and the direction of change.

Electric motor current limiting circuit arrangement, in particular for limiting the torque of tools driven by an electric motor

LOAD RECOVERY DRIVE SYSTEM AT VARIABLE SPEEDS

Speed control circuit for a sewing machine drive device with a clutch motor

Apparatus for finishing workpieces under controlled pressures

Inertia Estimation Method for Speed Control of Two-Inertia Torsional Vibration System

ACTUATOR FOR CONTROLLING THE ADJUSTING MEMBER OF A POWER GENERATING MACHINE

Motor-control system

Constant speed mechanism

Speed controller for motor with electromagnetic clutch and electromagnetic brake

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

A rolling mill motor and method of operating the same

1,077,420. Control of motors. ALLM€NNA SVENSKA ELEKTRISKA A.B. Nov. 3, 1964 [Nov. 5, 1963], No. 44712/64. Heading H2J. [Also in Division G1] The current supply 11 for an electric motor 10 driving a rolling mill roller 12 is controlled in accordance with measurements of the torsional stress in the drive-shaft and the armature current. The signals representing the measurements are summed in an amplifier 9. A safety limit value is thereby produced to protect the motor in the event of abnormal loading.

Actuator

There is provided an actuator in which an worm is rotationally driven by an electric motor, and in which an angular velocity of the electric motor is repeatedly fluctuated so that the rotation of the worm is carried out as if the worm is oscillated in the rotational direction thereof, to thereby decrease contact friction of the worm against a worm wheel, resulting in an improvement of an efficiency of force transmission of the worm gear mechanism. Although the electric motor 20 is inherently controlled so that an output shaft 21 thereof is rotated at a target velocity based on a velocity command, a drive control section 40 controls the angular velocity of the output shaft 41 so as to be repeatedly increased and decreased with respect to the target velocity so that the angular velocity of the worm 11 is finely fluctuated, and thus the fluctuation of the angular velocity may be regarded as a fine general-oscillation of the rotating worm 11 in the rotational direction, whereby friction between the gear faces of the worm 11 and the gear faces of the worm wheel 12 can be decreased, resulting in an improvement of the efficiency of force transmission of the worm gear, and in increase in a driving force and a torque value to be transmitted to an object to be driven by the actuator.

Control device for an eddy current coupling

Control for electric brakes

Protective Speed Control.

1,178,345. Speed responsive brakes; clutch control. EATON YALE & TOWNE Inc. 16 May, 1968 [7 July, 1967], No. 23401/68. Headings F2E and F2L. [Also in Division G3] A protective speed control drive system, which will stop a driven member if its speed deviates significantly from a desired level, includes an eddy current coupling 21, between motor 19 and a stamping press 11, the clutch winding W1 being energized in dependence on the difference between the actual and desired speeds of the driven member, the brake winding W2 being energized in dependence on the inverse of the difference between the speeds, and a safety circuit 59, Fig. 8, (not shown), stopping the press when the difference between speeds exceeds a preselected value for a predetermined time interval by de-energizing the motor 19 and coupling 21 and a winding W3 controlling a mechanical brake 43. Coupled to the press crank-shaft 17 is a position indicator 45 comprising a mechanical coupling successively operating a set of switches in an interlock and programming circuit 47, see. also Fig. 2 (not shown), thereby programming the press speed within each cycle of operation, the circuit providing at lead 49 a D.C. reference signal representing a preselected press speed. An A.C. tachometer 41 provides an A.C. signal representing the actual press speed, the signal being applied via a filter circuit 51 to provide at lead 53 a D.C. feedback signal. The reference and feedback signals are provided to a clutch amplifier circuit 55, on inverting brake amplifier circuit 57, Fig. 4 (not shown), and the safety circuit 59. The amplified signals from circuit 55 represents the algebraic difference between the reference and feedback signals and is supplied via lead 61 to three similar pulse generating circuits 63A, 63B, 63C, Fig. 5 (not shown). Each pulse generator provides a pulse signal synchronized with a respective phase of the three-phase A.C. supply and at a phase angle varying as a function of the amplitude of the ...

Current limiting device, robot system, and current limiting method

This current limiting device (21) comprises a current limiting unit (23) that limits the current applied to a drive unit (14) so as to be within a limit value range. The limit values are set so as to change in accordance with the speed of the drive unit (14).

Method for attenuating oscillations of a rotating system

A method for attenuating oscillations of a rotating system. Acceleration and deceleration of the system are sensed. In dependence on an acceleration, an eddy-current brake is applied to the rotating system. In dependence on a deceleration, rotational energy is supplied to the system from a rotational energy source.

Improvements in or relating to a control for a power operated machine

691,097. Controllers. LONG CO., W. E. Aug. 16,1951 [Oct. 30, 1950], No. 19347/51. Class 38(iii) [Also in Group II] A control for a power operated machine such as a mixer includes a power cut-off, a timer for the cut-off, a load measuring device including an instantaneous load indicator and a peak load indicator and means effective upon separation of the indicators for setting the timer in operation. As described, for automatically stopping a dough mixer at the correct stage of gluten development, there is provided a load measuring device 19, such as a watt meter, having an indicating pointer 18 and a friction pointer 20 which carry contacts 21, 22 in the circuit of a solenoid switch 16. When the load on the mixing machine drops the contacts 21, 22 open, thereby closing the switch 16 and setting into operation a timer 14. If the contacts 21, 22 remain open for a period selected in setting the timer, the timer will close the circuit 15 for a solenoid coil 13 and open a switch 12 in the circuit of the motor 10, but if the contacts 21, 22 close before this period of time has elapsed the switch 16 will again open and the timer 14 will reset for another operation and this will continue as the indicating pointer vacillates until the contacts 21, 22 remain open for the required period. In an alternative embodiment, Fig. 2 (not shown), the load measuring device acts through an intermediate power device, such as a servomechanism.

Device for the operation of trawl winches with electric motor control

Patent FR2361942B3

Improvements in automatic speed governing means controlling eddy current clutches

576,620. Automatic control systems for eddy current clutch drives. WINTHER, M. P. March 6, 1942, No. 2939. Convention date, June 28, 1941. [Class 38 (iv)] Speed.-The excitation of an eddy current clutch C is supplied through grid-controlled rectifiers RT and a tapping 10 on a potentiometer predetermines the speed of the output shaft by imposing a definite voltage on the grids G. A generator AL on the output shaft produces an opposed potential, which increases with the speed of the shaft, in a resistance R1 in series with the potentiometer voltage so that any deviation from the speed preset causes a change in clutch excitation to correct the speed. The generator is preferably a permanent magnet machine of comparatively high frequency. As shown the generator output is taken through' a full-wave rectifier tube RE2 but dry rectifiers, e.g., of the selenium type, are used in a modified arrangement. To prevent hunting due to the time constant of the control a condenser may be connected across a resistance in series with that producing the opposed potential aforesaid, so that a transient potential change is induced which advances the control effect. The predetermined value of grid potential may be obtained differentially from two potentiometers in parallel. The Specification as open to inspection under Sect. 91 states that the generator AL may be a D.C. machine. This subject-matter does not appear in the Specification as accepted.

ADDITIONAL DRIVE DEVICE FOR A TURBINE DRIVE SYSTEM.

Vehicle

Die Erfindung betrifft ein Fahrzeug, insbesondere zum Antrieb durch Muskelkraft vorgesehenes Fahrzeug. Erfindungsgemäß weist das Fahrzeug Einrichtungen (6-11) zur Kompensation von Kräften (14; 16) auf, die infolge Abweichung von definierten Betriebsbedingungen auf das Fahrzeug in oder entgegen der Fahrtrichtung einwirken. Vorteilhaft zeigt das Fahrzeug auch bei Abweichung von den Betriebsbedingungen ein diesen entsprechendes, unverändertes Fahrverhalten.

Auxiliary starting for electric motors

A fluid-powered auxiliary starting system for electric motors is disclosed which includes an accumulator means for supplying an amount of fluid at high pressure to a fluid-operated motor and a clutch of similar device for connecting the output shaft of the fluid-operated motor to transfer rotational torque to the shaft of the prime mover motor to be started. The system may be either hydraulic or pneumatic and may be used to bring one or more electric motors substantially up to spaced before electric power is applied to the motors themselves. The same motor or a hydraulic or pneumatic pump may be used to recharge the accumulator between uses for electric motor starting.

Control system for eddy current coupling drive for armoured face conveyors

A control system for eddy current coupling drive for armoured face conveyors wherein the systems controls a number of eddy current drives via a pair of power supply lines and a single pilot line. A main contactor controlled by a relay is held closed by contact of a pilot relay which is energized only if relay contacts in individual control units for each drive remain closed. These last mentioned contacts open if certain operating conditions are not met.