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WO/1986/000490A1 |
A control board for inverter-driven, variable speed AC motors, including a casing (9), a plurality of large-sized electric parts (1), (2), (5) arranged in the interior of the casing (9) and having one connecting terminal (14) at an upper...
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WO/1985/005509A1 |
An electric rotating machine which is adapted to function as a motor or a generator without any major electrical or mechanical modifications. This machine has associated therewith, microprocessor controls (5). There are provided two bala...
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WO/1985/004993A1 |
A method of controlling a permanent magnet synchronous motor (M) and an apparatus therefor, in which signals representing differences between instruction signals (RTC, STC, TTC) for armature winding currents of each of the phases and the...
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WO/1985/004535A1 |
Arrangement for the control or regulation of the rotation speed and/or the torque of an induction motor (1) which is supplied by an inverter (5). The inverter is connected to a rectifier (14) connected via a transducer (20) to an alterna...
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WO/1985/003061A1 |
In conventional reel tension control, it has been impossible to control reel tension ratio over a wide range exceeding 1:10, with a single D.C. motor. Hitherto, therefore, various measures have been taken for attaining such a high ratio ...
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WO/1985/000079A1 |
An electrical switching circuit for a multi-phase a.c. supply uses semiconductor rectifier switches SCR1 to 5 to reversibly switch power to a multi-phase electric motor so that the motor can be run in a forward or a reverse direction. Th...
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WO/1984/005000A1 |
A variable slip drive system for driving a variable speed induction motor. The system includes a tachometer for providing a signal proportional to the speed of the motor and a slip oscillator. The output of the tachometer and slip oscill...
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WO/1984/004213A1 |
An electrical circuit apparatus, which can be used with an A.C. synchronous motor to deliver electrical power to the A.C. motor from an electrical power source, in which the speed of the A.C. motor is controlled solely by the source volt...
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WO/1984/003596A1 |
A method of controlling a synchronous motor comprises detecting the fact that an inverter-driving signal controlling the current supplied to the synchronous motor has exceeded the physical saturation quantity of an inverter, and effectin...
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WO/1984/002619A1 |
A system for controlling a synchronous motor is provided with a detector (112) detecting the rotational angle of a synchronous motor (101), and a control circuit (108) which generates a sine value corresponding to the rotational angle de...
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WO/1984/002404A1 |
Motor power-factor controllers (12) act, in the presence of varying motor loads, to maintain the phase lag angle (O/M) between motor voltage and current at a preset demand or reference phase-lag value (O/R) by regulating the firing angle...
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WO/1984/002234A1 |
A servomotor control system comprises: a detector for detecting the angular velocity of a servomotor (101); a detector for detecting the actual current flowing through the servomotor (101); a power drive circuit for driving the servomoto...
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WO/1984/002235A1 |
An AC motor control system comprises: a detector (113) for detecting the angular velocity of an AC motor (101); a detector (112) for detecting the actual current flowing through the AC motor (101); a power drive circuit for driving the A...
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WO/1984/001865A1 |
A controller for an AC motor comprises: a first arithmetic means (3) which calculates an amplitude command on the basis of the difference between a command rotational velocity and the actual rotational velocity of an AC motor (1) and out...
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WO/1984/001063A1 |
An improved induction motor controller of the flux-feed-forward type in which closed-loop control of the motor is provided by feeding back a signal (Wr) representative of the motor shaft speed or position to a circuit which compares this...
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WO/1983/004349A1 |
An apparatus for processing the regenerative energy of an AC motor comprises a regeneration-detecting logic circuit (7) outputting a regeneration detection signal when it detects that a semiconductor switch for an AC motor drive is not c...
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WO/1983/003929A1 |
An induction motor driving device for driving an induction motor (10) on the basis of current commands (iu, iv, iw) of three phases output by using the deviation (ER) between a speed command and the actual speed (n). This driving device ...
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WO/1983/003930A1 |
An A.C. motor controller controls power factor by phase controlling the on-time of the gate controlled semiconductor switch in series with the motor. The circuit provides a power factor sensing motor controller with an improved phase-to-...
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WO/1983/003325A1 |
A speed control circuit for a motor (28) driving a constant linear speed type of disc (2) for driving and controlling the motor (28) by a compared phase error output together with the start of the motor (28), by phase comparison of a dat...
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WO/1983/002341A1 |
An improved motor speed control system for high speed, high resolution motor control applications such as centrifuges. A proportional or proportional plus integral motor control system is provided with improved circuitry which uses digit...
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WO/1983/001542A1 |
An arrangement for driving a pump, fan or like load (1), which only temporarily needs to be driven at a maximum speed, comprises a short-circuited asynchronous drive motor (2), which can be connected alternatively to a first a.c. power s...
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WO/1983/000851A1 |
A marine drive system utilizing a multiphase induction motor (15) for driving the propulsion propeller of the drive from a battery power supply. The number of phases defined by the motor stator winding, in the preferred embodiment of the...
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WO/1983/000761A1 |
A frequency/speed controller (10) for controlling the frequency or speed of a device (12) by comparing the frequency (F2) of the device to a know reference frequency (F1) and matching the device frequency with the reference frequency. Th...
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WO/1982/003301A1 |
An armature current-instruction (Is) in response to the velocity deviation of a synchronous motor (101) and the phase ((Alpha)) of an induced voltage, which phase is mesured with respect to the position of the field pole, are multiplied ...
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WO/1982/002461A1 |
An induction motor drive system, in which the drive speed is in response to a reference speed by applying a vector control method, with maintaining the exciting current command value Io for the induction motor (14). In this system, when ...
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WO/1982/001628A1 |
A method and apparatus for controlling an AC induction motor, having at least two phases. The motor is controlled by two input signals (S1, S2), which are connected to a resolver (1), the output signals of which are used to generate sepa...
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WO/1982/001354A1 |
A method and apparatus for controlling a plurality of subsystems (66, 70) associated with an agricultural vehicle such as a tractor. Examples of such subsystems in a tractor are hitch positioning, power take off (PTO), multiple range tra...
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WO/1982/001283A1 |
An arrangement to provide variation of the speed or other operating parameters of an electrical machine without connection to the rotor. The machine is of the induction type having a winding in separate parts to create a flux movable in ...
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WO/1982/001092A1 |
In the method and circuit for adjusting the rotation speed or the frequency of an electric motor (according to the PLL principle), frequencies or reference pulses generated by a frequency generator (2) connected to the input of an AND ga...
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WO/1981/002818A1 |
A microcomputer controlled power tool (10) including a semiconductor control device (64) connected to the motor (66), one or more sensors (36, 58), and a microcomputer (50) interfaced to a keyboard (28) and digital display (30) for monit...
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WO/1981/002651A1 |
In the past duty cycle control for power optimization of induction motors has been accomplished with a series-inserted, phase triggered thyristor and a motor voltage-current phase angle measuring control circuit. These type of systems ar...
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WO/1981/001920A1 |
Simple and economical device allowing the recovery of energy stored by the grid-leak inductances of the electrical machine connected to the thyratron inverter. According to the invention, the device comprises a transformer of which the p...
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WO/1981/000651A1 |
Induction motors traditionally have a high breakaway torque to running torque ratio to prevent motor damage from excessive current as the motor slows down under a heavy load. Such design characteristic results in motor flux density being...
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WO/1980/002895A1 |
An AC induction motor (16) for driving a varying mechanical load is powered via a Triac switch (20) electrically inserted in series with the motor and its AC supply. A low ohmic value resistor (27), also in series with the motor, continu...
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WO/1980/002346A1 |
A speed control circuit for a motor (24) is responsive to variations in motor supply voltage (Vs) and torque wherein a voltage output (72) is produced by means (29-68) determined by the actual speed of the motor. The voltage output is ap...
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WO/1979/001132A1 |
A variable reluctance electric motor system includes a variable reluctance motor having a main winding for each phase and a power converter circuit including a main thyristor in series with each main winding connected across a direct vol...
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JP2024518895A |
A method is proposed for checking, in particular contactless, the operating state of a compressor (1) and/or the speed of a compressor drive (2), in particular a variable speed or constant speed compressor drive (2). , this method is - d...
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JP7474181B2 |
To provide a motor control device capable of recovering a regenerative operation by speedily discharging capacitor charge in a case where a contactor is brought into an open state during the regenerative operation.A contactor open detect...
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JP7470452B2 |
The present disclosure is constructed on the prior art inverter architecture, a pulse code width modulation (PCWM). This is an open loop motor control system without sensing its rotor position. The present disclosure employs a closed loo...
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JP7468669B2 |
An electric motor control method is an control method which is capable of selecting a first mode or a second mode as a control mode for controlling an operation of the electric motor according to an operating state of the electric motor....
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JP7468377B2 |
A control apparatus is applied to a system that includes a rotating electric machine and an inverter. The inverter has, for each of a plurality of phases, upper-arm and lower-arm switches each of which has a diode connected in antiparall...
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JP7469063B2 |
To appropriately control a motor of an industrial machine.A learning device performs learning for observing a temperature of an induction motor 250, a rising time T1 of an excitation current, and a sum of a rising time T2 of an accelerat...
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JP7466816B1 |
The motor control device (10) includes a speed control unit (14) that performs proportional calculation and integral calculation on the speed deviation (Ve) using the control parameter (Cp) and outputs a first operation signal (u1); 1 A ...
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JP7465735B2 |
To improve accuracy of a torque control of a dynamo-electric motor.An control apparatus 100 comprises: a current detection part 12 detecting a current vector i; a pickup control part 3 that outputs a pickup voltage command V0 on the basi...
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JP2024048720A |
[assignment] A motor control device capable of stably and accurately estimating and compensating for a gain error of a current sensor without requiring a special operation sequence is provided. [Solution] This motor control device (1) us...
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JP7459312B2 |
A control device controls operation of a power conversion apparatus including a converter, a smoothing capacitor, and an inverter. The control device includes a voltage command calculation unit, a torque ripple compensation command calcu...
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JP2024042474A |
An object of the present invention is to provide a control device for an induction motor that can suppress a decrease in torque accuracy in the case of intermittent operation. [Solution] A control device for an induction motor includes a...
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JP7456834B2 |
A motor controller includes an observer that estimates a y-axis electromotive force and a δ-axis electromotive force, during an idle time of a rotor of a motor. The motor controller includes a derivation unit that derives a phase differ...
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JP2024040108A |
The present invention provides a technology capable of controlling the opening/closing operation of a door of a railway vehicle and diagnosing abnormalities related to the opening/closing operation, taking into account the inclination an...
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JP7451839B2 |
To provide a filtering device and a control device for a motor, capable of stably suppressing load and vibration of the motor.A filtering device 1 comprises: an adaptive filter 53 that is arranged between an input terminal 51 and an outp...
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