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1. 发明授权

US4910450A Low cost three phase energy economizer 失效
标题翻译：低成本三相节能节能器
公开(公告)号：US4910450A
公开(公告)日：1990-03-20
申请号：US379853
申请日：1989-07-14
申请人： Louis W. Parker , Lowell C. Hahn
发明人： Louis W. Parker , Lowell C. Hahn
IPC分类号： H02P27/02
CPC分类号： H02P27/026
摘要： An energy economizing AC power control system for energizing the stator windings of a three phase induction motor comprises an AC generator connected to the motor rotor shaft for generating an AC signal that is frequency modulated in response to load induced speed variations of the rotor, a variable resistance whose magnitude is responsive to the frequency modulated signal, an AC power proportioning switch which produces a single phase output consisting of pulses whose widths vary with variations in the magnitude of the variable resistance, a single phase-to-three phase converter coupled to the output of the proportioning switch for producing three control signals that occur respectively at the frequency of and during each voltage phase alternation of a three phase sine wave power supply, and three solid state switches that are respectively controlled by said control signals for controlling the time duration that each alternation of the three phase power supply is coupled via an associated one of the solid state switches to an associated one of the motor stator windings.
摘要翻译：用于为三相感应电动机的定子绕组通电的节能交流电力控制系统包括连接到电动机转子轴的AC发电机，用于产生响应于转子的负载感应速度变化而频率调制的AC信号，变量电阻，其大小响应于调频信号; AC功率比例开关，其产生由其宽度随可变电阻幅度的变化而变化的脉冲组成的单相输出;耦合到该调制信号的单相到三相转换器用于产生分别以三相正弦波电源的每个电压相位交替的频率和期间发生的三个控制信号的比例开关的输出，以及分别由用于控制持续时间的所述控制信号控制的三个固态开关三相电源的每个交替通过关联耦合将固态开关中的一个切换到相关联的一个电动机定子绕组中。

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