再颁专利
USRE37360E1 Electronic motor controls, laundry machines including such controls and/or methods of operating such controls
失效
电子电动机控制器，包括这种控制的洗衣机和/或操作这种控制的方法
- 专利标题： Electronic motor controls, laundry machines including such controls and/or methods of operating such controls
- 专利标题（中）： 电子电动机控制器，包括这种控制的洗衣机和/或操作这种控制的方法
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申请号： US07837588申请日： 1992-02-18
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公开(公告)号： USRE37360E1公开(公告)日： 2001-09-11
- 发明人: Gerald D. Duncan
- 申请人： Gerald D. Duncan
- 优先权： NZ213489 19850916; NZ213490 19850916
- 主分类号： H02P122
- IPC分类号： H02P122
摘要：
A control apparatus and method for an electric motor having sensing devices which sense the frequency and polarity of EMFs in the rotor windings down to a condition where the rotor is in condition for reversing, and causing reversing of the motor when the frequency is such as to allow reversing and the polarits polarity of a selected winding is at or near a zero crossing between positive and negative polarities. Cyclical reversal is effected by measuring the time the rotor takes to coast from a “power off” condition to the condition for reversing and with an electronically commutated motor reversing can usually be effected in one commutation period. The motor is used in a clothes washing machine or similar application where rapid reversal is required or timing of the time from one reversal to the next is required to be constant.
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