Methods and systems for controlling an electric motor

Patent metadata

Field	Value
Publication number	US-8928262-B2
Application number	US-201313826043-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

A system and method of controlling an electric motor using a motor controller are provided. The system includes an electric motor controller configured to be coupled to an electric motor and to control the electric motor to produce approximately constant average torque. The controller includes a rectifier configured to convert an AC input voltage to a pulsing DC voltage, a DC link electrically coupled to the rectifier, an inverter electrically coupled to the DC link and configured to generate a three phase AC voltage to drive the electric motor, and a controller configured to receive a measurement of a motor current value for the motor, estimate a torque generated in the electric motor using the measurement of the instantaneous motor current value, and generate a real-time current demand signal using the estimated torque value, the real-time current demand signal compensating the motor controller to produce a substantially constant average motor output torque.

First claim

The invention claimed is:

1. An electric motor drive controller configured to be coupled to an electric motor, said drive controller configured to control the electric motor to produce approximately constant average torque, said drive controller comprising:
a rectifier configured to convert an AC input voltage to a pulsing DC voltage;
a DC link electrically coupled to the rectifier;
an inverter electrically coupled to the DC link and configured to generate a three phase AC vol…

Assignees

• Regal Beloit America Inc

Inventors

• Chretien Ludovic Andre

Classifications

• H02P23/14 Primary

  Electricity · mapped topic

• H02P21/05 Primary

  Electricity · mapped topic