- Patent Title: Motor current controller and method for controlling motor current
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Application No.: US15003282Application Date: 2016-01-21
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Publication No.: US09614470B2Publication Date: 2017-04-04
- Inventor: Hidetoshi Hijikata
- Applicant: MINEBEA CO., LTD.
- Applicant Address: JP Nagano
- Assignee: Minebea Co., Ltd.
- Current Assignee: Minebea Co., Ltd.
- Current Assignee Address: JP Nagano
- Agency: Carrier Blackman & Associates, P.C.
- Agent Joseph P. Carrier; William D. Blackman
- Priority: JP2015-010404 20150122
- Main IPC: H02P8/12
- IPC: H02P8/12 ; H02M7/48

Abstract:
A motor current controller includes: an H-bridge circuit that includes a switching element and is connected to a motor coil provided in a motor; and a control unit that drives the switching element every PWM cycle and designates an operation mode from among a plurality of modes including a charge mode, in which a motor current flowing in the motor coil increases, and a decay mode, in which the motor current is decreased for the H-bridge circuit. The control unit operates to select the decay mode as the operation mode with higher priority during a period in which the PWM cycle ends after the maximum duty time elapses from the start of each PWM cycle.
Public/Granted literature
- US20160218648A1 MOTOR CURRENT CONTROLLER AND METHOD FOR CONTROLLING MOTOR CURRENT Public/Granted day:2016-07-28
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