Controller for electric power steering apparatus

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control

Reexamination Certificate

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Details

C701S042000, C701S070000, C180S446000

Reexamination Certificate

active

07610133

ABSTRACT:
In a controller for an electric power steering apparatus, a target value calculation element, which calculates target values of the drive currents of a motor on the basis of a detected value of the steering torque, is constituted by a first integrated circuit provided in a chip. A drive signal value calculation element, which calculates drive signal values for driving the motor on the basis of the target values calculated by the target value calculation element, detected values of the drive currents of the motor, and a detected value of the rotary position of a rotor of the motor, is constituted by a second integrated circuit provided in another chip from the chip. A driving element drives the motor in accordance with the drive signal values. The first integrated circuit is connected communicably to the second integrated circuit. The calculation cycle of the drive signal values is set to be shorter than the calculation cycle of the target values.

REFERENCES:
patent: 6679350 (2004-01-01), Shimizu et al.
patent: 6862507 (2005-03-01), Altemare, Jr. et al.
patent: 6885927 (2005-04-01), Arimura
patent: 2002/0177932 (2002-11-01), Kifuku et al.
patent: 2003/0155879 (2003-08-01), Kifuku et al.
patent: 1 149 754 (2001-10-01), None
patent: 1 205 373 (2002-05-01), None
patent: 2002-331946 (2002-11-01), None

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