发明授权
US06346789B1 Motor step-less speed control with active feedback of phase detector
失效
电机无级调速与相位检测器的主动反馈
- 专利标题： Motor step-less speed control with active feedback of phase detector
- 专利标题（中）： 电机无级调速与相位检测器的主动反馈
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申请号： US09450077申请日： 1999-11-29
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公开(公告)号： US06346789B1公开(公告)日： 2002-02-12
- 发明人: Douglas D. Bird , Brent Chian
- 申请人： Douglas D. Bird , Brent Chian
- 主分类号： H02N300
- IPC分类号： H02N300
摘要：
An apparatus for and method of controlling the circulating fan of a gas appliance. The circulating fan is powered by an alternating current electric motor. An electronic circuit, powered by the heat of the gas appliance, determines the rotational speed of the electric motor by controlling the effective duty cycle of the alternating current source coupled to the electric motor.
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