Control System for Electric Motor
AssigneeTRW Inc.
InventorsChristopher David Dixon, Peter Geoffrey Scotson
Life of this patent
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Abstract
A control system for an electric motor comprises a current controller which produces a set of voltage demands for the motor, a current sensing means arranged to produce a current sensing output indicative of electric current in the motor, and a current signal processing means arranged to process the current sensing output signal to produce a modified current signal in which at least one harmonic component present in the current sensing output signal due to inaccuracies in the current measurement is removed or substantially reduced. The modified current signal is combined with a demanded motor current to provide the input to the current controller.
Claims8
A control system for an electric motor, the control system comprising:
- a current controller which produces a set of voltage demands for the electric motor, a current sensing means arranged to produce a current sensing output signal indicative of electric current in the electric motor, current signal processing means arranged to process the current sensing output signal to produce a modified current signal in which at least one harmonic component present in the current sensing output signal due to inaccuracies in the current processing is removed or substantially reduced, and in which the modified current signal is combined with a demanded motor current to provide an input to the current controller.
Dependencies are inferred from the claim text.