Invention Grant
- Patent Title: Micro-step driving control apparatus for stepping motor
- Patent Title (中): 用于步进电机的微步驱动控制装置
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Application No.: US13820792Application Date: 2011-10-03
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Publication No.: US08963475B2Publication Date: 2015-02-24
- Inventor: Munetaka Kashiwa
- Applicant: Munetaka Kashiwa
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-225679 20101005
- International Application: PCT/JP2011/072779 WO 20111003
- International Announcement: WO2012/046693 WO 20120412
- Main IPC: H02P8/22
- IPC: H02P8/22 ; H02P8/38

Abstract:
A micro-step driving control apparatus for a stepping motor in which torque fluctuations caused by influence of detent torque can be reduced without performing preliminary driving, including: a phase difference estimator calculating, based on detected motor current and a command value, an estimated phase difference between the command value and the current; low-speed and high-speed motor rotational angle estimators calculating an estimated motor rotational angle at a low speed rotation and an estimated motor rotational angle at a high speed rotation; an addition unit calculating, based on the command value, an estimated motor rotational angle by mixing the estimated motor rotational angles at an appropriate rate; a detent torque estimator calculating, based on the mixed estimated motor rotational angle, estimated detent torque; and a compensation signal generator generating a compensation signal based on the estimated detent torque and the mixed estimated motor rotational angle.
Public/Granted literature
- US20130162191A1 MICRO-STEP DRIVING CONTROL APPARATUS FOR STEPPING MOTOR Public/Granted day:2013-06-27
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