Torque control method for an electric motor

Patent metadata

Field	Value
Publication number	US-2017099020-A1
Application number	US-201515312483-A
Country	US
Kind code	A1
Filing date	May 21, 2015
Priority date	May 21, 2014
Publication date	Apr 6, 2017
Grant date	—

Abstract

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.

First claim

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.

Assignees

• Commissariat Energie Atomique

Inventors

• Abroug Neil

Classifications

• H02P7/06 Primary

  for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current · CPC title

• H02P29/40

  Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load · CPC title

• H02P7/00 Primary

  Arrangements for regulating or controlling the speed or torque of electric DC motors · CPC title

• H02P31/00

  Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00 · CPC title