Title:
回転検出装置及び回転検出システム
Document Type and Number:
Japanese Patent JP5385318
Kind Code:
B2
Abstract:
A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current component detecting device, and a rotational state detecting device. An impedance between brushes of the motor changes periodically in accordance with rotation of the motor. The alternating-current component detecting device detects change of an alternating-current component of electric current that is supplied to the motor based on an electrical quantity. The change of the alternating-current component is caused by change of the impedance caused in accordance with the rotation. The rotational state detecting device detects at least one of a rotation angle, a rotational direction, and a rotational speed of the motor based on a detection result of the alternating-current component detecting device.
Inventors:
Ken Tanaka
Fukakawa Yasuhiro
Toge Masaru
Fukakawa Yasuhiro
Toge Masaru
Application Number:
JP2011037229A
Publication Date:
January 08, 2014
Filing Date:
February 23, 2011
Export Citation:
Assignee:
株式会社日本自動車部品総合研究所
株式会社デンソー
株式会社デンソー
International Classes:
G01P3/481; G01D5/245; H02P7/03; H02P7/29
Domestic Patent References:
| JP2003111465A | ||||
| JP11196592A | ||||
| JP6339293A | ||||
| JP2010063347A | ||||
| JP2011196995A | ||||
| JP2011176944A | ||||
| JP2011176943A | ||||
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| JP2011176910A | ||||
| JP2011130582A | ||||
| JP2010288438A |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation