Invention Grant
- Patent Title: Range switching device
- Patent Title (中): 量程切换装置
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Application No.: US14078659Application Date: 2013-11-13
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Publication No.: US09304506B2Publication Date: 2016-04-05
- Inventor: Kazuhiro Yoshida , Jun Yamada
- Applicant: DENSO CORPORATION
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2012-253330 20121119
- Main IPC: H02P6/00
- IPC: H02P6/00 ; G05B19/39 ; F16H61/32 ; F16H61/28

Abstract:
A range switching device provides a feedback control for rotating a motor toward a target rotation position. When a target shift range is switched, the range switching device rotates the motor toward a target rotation position by sequentially switching power supply phases of the motor based on an encoder count value. When the motor rotates within a predetermined stop range, the feedback control ends and a power supply to the motor is stopped. However, if the motor has not rotated to the target rotation position after a predetermined time has elapsed from the stopping of the power supply to the motor, an open drive is performed, in which the power supply phase of the motor is sequentially switched by open-loop control and the motor is rotated in small and/or minute steps toward the target rotation position. In such manner, position accuracy of the shift range switching is improved.
Public/Granted literature
- US20140139171A1 RANGE SWITCHING DEVICE Public/Granted day:2014-05-22
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