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1. 发明授权

US5045991A Unity power factor AC/DC converter 失效
标题翻译： Unity功率因数AC / DC转换器
公开(公告)号：US5045991A
公开(公告)日：1991-09-03
申请号：US458440
申请日：1989-12-28
申请人： P. John Dhyanchand , Vietson Nbuyen
发明人： P. John Dhyanchand , Vietson Nbuyen
IPC分类号： H02M1/00 , H02M1/42 , H02M7/219
CPC分类号： H02M1/4233 , H02M7/219 , H02M1/4216 , Y02B70/126 , Y02P80/112
摘要： A control for an AC/DC power converter having first and second switches and which converts an AC voltage supplied by an AC source into a DC voltage on a DC output conductor includes circuitry for developing an error signal representing the deviation of the DC voltage from a desired level and a multiplier coupled to the developing circuitry and responsive to the AC voltage for deriving a reference signal representing a desired current magnitude from the AC source. A current sensor develops a current magnitude signal representing the magnitude of the current from the AC source and a circuitry having a hysteresis characteristic compares the current magnitude signal with the reference signal to obtain a comparison signal. Buffer and interface circuits operable the first and second switches in accordance with the comparison signal to in turn cause the DC voltage to approach the desired level and to cause the current from the AC power source to have a certain phase relationship with respect to the AC voltage supplied thereby.
摘要翻译：具有第一和第二开关并将由AC电源提供的AC电压转换成DC输出导体上的DC电压的AC / DC电力转换器的控制器包括用于产生表示DC电压偏离的误差信号的电路耦合到显影电路并响应于AC电压从AC源导出表示期望的电流幅度的参考信号。电流传感器产生表示来自AC源的电流幅度的电流幅度信号，并且具有滞后特性的电路将当前幅度信号与参考信号进行比较以获得比较信号。缓冲器和接口电路根据比较信号对第一和第二开关进行操作，从而使DC电压接近所需的电平，并使来自AC电源的电流相对于AC电压具有一定的相位关系由此提供。

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