发明申请
US20100134055A1 MOTOR SPEED CONTROL SYSTEM AND METHOD WITHOUT PULSE-WIDTH MODULATION
有权
电机速度控制系统和无脉冲调制的方法
- 专利标题: MOTOR SPEED CONTROL SYSTEM AND METHOD WITHOUT PULSE-WIDTH MODULATION
- 专利标题(中): 电机速度控制系统和无脉冲调制的方法
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申请号: US12480161申请日: 2009-06-08
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公开(公告)号: US20100134055A1公开(公告)日: 2010-06-03
- 发明人: Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
- 申请人: Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
- 主分类号: H02P23/14
- IPC分类号: H02P23/14 ; H02P6/18
摘要:
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.
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