Invention Grant
US07667419B2 Motor driving apparatus, motor driving method and disk driving apparatus
失效
电动机驱动装置,电动机驱动方法和磁盘驱动装置
- Patent Title: Motor driving apparatus, motor driving method and disk driving apparatus
- Patent Title (中): 电动机驱动装置,电动机驱动方法和磁盘驱动装置
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Application No.: US11766884Application Date: 2007-06-22
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Publication No.: US07667419B2Publication Date: 2010-02-23
- Inventor: Shingo Fukamizu , Yasunori Yamamoto , Hideaki Mori , Shinichi Kuroshima
- Applicant: Shingo Fukamizu , Yasunori Yamamoto , Hideaki Mori , Shinichi Kuroshima
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: RatnerPrestia
- Priority: JP2006-172848 20060622
- Main IPC: H02P6/18
- IPC: H02P6/18

Abstract:
A motor driving apparatus includes a virtual difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and a terminal of a motor coil in non-conduction state, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter based on the rotor position. The motor driving apparatus has a searching start mode for detecting the rotor position and energizes the coils, and a back electromotive voltage feedback mode for controlling commutation based on the back electromotive voltage. In the searching start mode, a rotor position searching process and a rotation start torque applying process are alternately performed.
Public/Granted literature
- US20080018279A1 MOTOR DRIVING APPARATUS, MOTOR DRIVING METHOD AND DISK DRIVING APPARATUS Public/Granted day:2008-01-24
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