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Title:
ROTATION ANGLE DETECTOR-EQUIPPED ELECTRIC MOTOR, ELECTRIC MOTOR ROTATION ANGLE DETECTOR, AND METHOD FOR DETECTING ROTATION ANGLE OF ELECTRIC MOTOR EQUIPPED WITH COMMUTATOR
Document Type and Number:
WIPO Patent Application WO/2018/207680
Kind Code:
A1
Abstract:
A rotation angle detector (100) for detecting the rotation angle of an electric motor (10) equipped with a commutator (20) includes: a resistance setting unit (37) for setting a resistance value that corresponds to the resistance properties of the electric motor (10); and a rotation information calculation unit (36) for calculating information about the rotation of the electric motor (10) on the basis of the detected voltage value detected by a voltage detection unit (10a), a detected current value detected by a current detection unit (10b), and the set resistance value (Rm) set by the resistance setting unit (37). The resistance setting unit (37) is configured so as to derive an estimated resistance value (R'm) on the basis of the detected voltage value and the detected current value which were detected in a stable state of electric motor (10) rotations, and to update the set resistance value (Rm) using the estimated resistance value (R'm).

Inventors:
MIYAKO, Ikuyasu (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
ABE, Tsutomu (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
Application Number:
JP2018/017395
Publication Date:
November 15, 2018
Filing Date:
May 01, 2018
Export Citation:
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Assignee:
ALPS ELECTRIC CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
International Classes:
H02P7/06
Foreign References:
JP2012240656A2012-12-10
JP2011087412A2011-04-28
JP2002127922A2002-05-09
JP2010130727A2010-06-10
JP2001186726A2001-07-06
US20140042944A12014-02-13
Attorney, Agent or Firm:
ITOH, Tadashige et al. (16th Floor, Marunouchi MY PLAZA 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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