Failure detection apparatus for resolver

Details Failure detection apparatus for resolver Failure detection apparatus for resolver

2011-08-09

2011-08-09

Nguyen, Ha (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S202000

Reexamination Certificate

active

07994776

ABSTRACT:
A failure detection apparatus for a resolver outputting a sine signal indicative of sin θ and a cosine signal indicative of cos θ according to a rotational angle θ of a rotator, includes an inspection value calculating section configured to calculate an inspection value based on at least one of the sine signal and the cosine signal; a failure detecting section configured to judge whether the resolver is in a failure state or not on the basis of the inspection value; a counting section configured to gradually increase a count value with a lapse of time when the failure detecting section is determining that the resolver is in the failure state, and configured to gradually decrease the count value with a lapse of time when the failure detecting section is determining that the resolver is not in the failure state; and a failure deciding section configured to finally decide that the resolver has caused the failure on the basis of the count value.

REFERENCES:
patent: 7009535 (2006-03-01), Kanekawa et al.
patent: 7513169 (2009-04-01), Noritou
patent: 7664619 (2010-02-01), Kameya et al.
patent: 2008/0052562 (2008-02-01), Kameya et al.
patent: 9-072758 (1997-03-01), None
patent: 09280890 (1997-10-01), None
patent: 02006177750 (2006-07-01), None
Machine English Translation, Igari et al. JP 09280890 A, p. 1-10, Oct. 1997.
Machine English Translation, Miyata et al. JP02006177750A, p. 1-20, Jul. 2006.

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