Power-assisted steering system and difference compensating...

Details Power-assisted steering system and difference compensating... Power-assisted steering system and difference compensating...

2007-06-05

2007-06-05

Morris, Lesley D. (Department: 3611)

Land vehicles

Wheeled

Articulated vehicle

C180S402000, C180S444000, C318S430000, C318S432000, C318S434000, C701S041000, C701S042000, C701S043000, C701S084000, C701S087000

Reexamination Certificate

active

10968948

ABSTRACT:
A power-assisted steering system includes: two or more current detectors that detects current flowing to two or more phases of a motor and outputs detected current values; a correcting unit that corrects the detected current values output from the current detectors to compensate a difference in gain between the current detectors; and a motor driving driver that drives the motor based on a deviation between the target current value and corrected detected current values. When the same current flows to the phase in which the current flowing thereto is detected by the reference current detectors and the phase in which the current flowing is detected by the other current detector, the correcting unit calculates a gain correcting coefficient based on a detected current value of the reference current detector and a detected current value of the other current detector and corrects the detected current value of the other current detector.

REFERENCES:
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patent: 5787376 (1998-07-01), Nishino et al.
patent: 6810986 (2004-11-01), Takagi
patent: 6812660 (2004-11-01), Takahashi et al.
patent: 6837331 (2005-01-01), Kawada et al.
patent: 2002/0109474 (2002-08-01), Kifuku et al.
patent: 2003/0030406 (2003-02-01), Takahashi et al.
patent: 2003/0106738 (2003-06-01), Yoneda et al.
patent: 10-75598 (1998-03-01), None

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