Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2006-10-17
2006-10-17
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S434000, C318S132000, C318S434000, C318S254100, C318S700000
Reexamination Certificate
active
07122983
ABSTRACT:
The invention provides an electric power steering apparatus which can detect a ground fault of an angular resolver without fault. Values of a first resistance (R1), a second resistance (R2), a third resistance (R3) and a fourth resistance (R4) are set such that a difference between a minimum output potential (Vout Min) of a first differential amplifier (OP1) at a time when an angular resolver is not in a ground fault which may be generated on the basis of a dispersion of the first resistance (R1), the second resistance (R2), the third resistance (R3) and the fourth resistance (R4), and a direct-current resistance component (Rdc) of the angular resolver, and a maximum potential (Vout Max) at a time when the angular resolver is in the ground fault becomes equal to or more than a predetermined margin for preventing an erroneous ground fault detection in a CPU (62) side. Accordingly, it is possible to detect the ground fault of the angular resolver on the basis of an output potential (Vout) of the first differential amplifier (OP1) without fault.
REFERENCES:
patent: 4318617 (1982-03-01), Orsen
patent: 5406267 (1995-04-01), Curtis
patent: 6304074 (2001-10-01), Waffenschmidt
patent: 6644434 (2003-11-01), Fujii et al.
patent: 6803781 (2004-10-01), Kobayashi et al.
patent: 6882163 (2005-04-01), Ura
patent: 6901816 (2005-06-01), Yamaguchi
patent: 0 602 697 (1994-06-01), None
patent: 11037797 (1999-02-01), None
Asano Takatsugu
Kohno Toshio
Donovan Lincoln
FAVESS Co., Ltd.
Koyo Seiko Co. Ltd.
Smith Tyrone
Toyoda Koki Kabushiki Kaisha
LandOfFree
Rotating angle detecting apparatus and electric power... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotating angle detecting apparatus and electric power..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotating angle detecting apparatus and electric power... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3682214