Controller for electric power steering system

Details Controller for electric power steering system Controller for electric power steering system

1998-02-20

1999-11-09

Nappi, Robert E.

Electricity: motive power systems

Induction motor systems

Primary circuit control

180412, H02P 318

Patent

active

059821370

ABSTRACT:
Controller for an electric power steering system, which is adapted to predict a drop in power supply voltage for a motor and to perform an idling-up operation when the drop in the power supply voltage is predicted. Namely, this controller for the electric power steering system is adapted to control the motor for giving a steering assist force to a steering mechanism according to a current control value calculated from a steering assist command value, which is computed according to steering torque generated in a steering shaft, and from a motor current value. Further, this controller is provided with a predicting unit for predicting an occurrence of the drop in power supply voltage to be applied to the motor. Moreover, an idling-up operation is performed when the drop in power supply voltage is predicted.

REFERENCES:
patent: 4582155 (1986-04-01), Ohe
patent: 4624335 (1986-11-01), Shiraishi et al.
patent: 4653601 (1987-03-01), Nakamura et al.
patent: 4756375 (1988-07-01), Ishikura et al.
patent: 5361210 (1994-11-01), Fu
patent: 5521475 (1996-05-01), Fu et al.

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