Electric power steering apparatus and control method of the...

Details Electric power steering apparatus and control method of the... Electric power steering apparatus and control method of the...

2006-01-31

2006-01-31

Masih, Karen (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S434000, C318S433000

Reexamination Certificate

active

06992449

ABSTRACT:
In an electric power steering apparatus in which a third motor target current is determined from a first motor target current determined on the basis of a detection torque from a steering torque detection means and a second motor target current determined using at least a detection value of the motor current detection circuit as one of inputs, and a motor drive signal is calculated on the basis of the third motor target current and a detection current from the motor current detection circuit to control a motor current, there is included a motor current detection circuit failure judgment means for judging a failure of the motor current detection circuit, and when a judgment of failure is made, at least the second motor target current is limited.

REFERENCES:
patent: 4869333 (1989-09-01), Morishita et al.
patent: 6053001 (2000-04-01), Nunokawa et al.
patent: 2003/0157383 (2003-08-01), Takahashi
patent: 11-150976 (1999-06-01), None

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