An angle detection device such that an angle error is restricted even with respect to an angle signal component of an order other than that of an electrical angle frequency component included in an angle signal is obtained. A second n-fold angle signal (3θr2) is calculated using a first sine wave signal (S(3θr)) and a second sine wave signal (C(3θr)) obtained from a first n-fold angle signal (3θr) that is an angle signal (θr) multiplied by n (n is a real number other than 1), offset correction values (es and ec) of the first sine wave signal (S(3θr)) and the second sine wave signal (C(3θr)) respectively are calculated from the second n-fold angle signal (3θr2), the first sine wave signal (S(3θr)) is corrected by the calculated offset correction value (es) of the first sine wave signal (S(3θr)) being added to the first n-fold angle signal (3θr), and the second n-fold angle signal (3θr2) is corrected by the calculated offset correction value (ec) of the second sine wave signal (C(3θr)) being added to the second sine wave signal (C(3θr)).
ANGLE DETECTION DEVICE, AND ELECTRIC POWER STEERING DEVICE USING SAME
2021-10-21
Patent
Electronic Resource
English
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