Invention Grant
US08269440B2 Motor speed control system and method without pulse-width modulation
有权
电机速度控制系统和方法,无脉宽调制
- Patent Title: Motor speed control system and method without pulse-width modulation
- Patent Title (中): 电机速度控制系统和方法,无脉宽调制
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Application No.: US12480161Application Date: 2009-06-08
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Publication No.: US08269440B2Publication Date: 2012-09-18
- Inventor: Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
- Applicant: Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
- Applicant Address: BB St. Michael
- Assignee: Marvell World Trade Ltd.
- Current Assignee: Marvell World Trade Ltd.
- Current Assignee Address: BB St. Michael
- Main IPC: H02P23/12
- IPC: H02P23/12

Abstract:
A motor control system includes a power control module and a detection module. The power control module controls power applied to first and second stator coils of a motor to rotate a rotor. The rotor induces voltages in the first and second stator coils when the rotor is rotating. The detection module determines a first time when a first voltage is induced in the first stator coil and determines a second time when a second voltage is induced in the second stator coil after the first voltage is induced. The detection module determines a speed of the rotor based on a difference between the first and second time. The power control module applies current through the second stator coil a predetermined period after the second time. The power control module determines the predetermined period based on the speed of the rotor.
Public/Granted literature
- US20100134055A1 MOTOR SPEED CONTROL SYSTEM AND METHOD WITHOUT PULSE-WIDTH MODULATION Public/Granted day:2010-06-03
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