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发明公开
CN101738527A 用于功率因数校正控制电路的交流输入电压幅值检测电路 无效 - 撤回

用于功率因数校正控制电路的交流输入电压幅值检测电路
摘要：
本发明公开了一种用于功率因数校正控制电路的交流输入电压幅值检测电路，所述的功率因数校正控制电路包括有一中央处理器，本发明包括一电压互感器以及与该电压互感器的输出端连接的半波整流滤波电路，该半波整流滤波电路的输出端与所述的中央处理器相连，所述的半波整流滤波电路包括串联于电压互感器的两输出端之间的二极管D、第一电阻R1和第二电阻R2，还包括一并联于第二电阻R2两端的电容C，该电容C的一端与中央处理器相连。本发明的用于部分斩波型功率因数校正控制电路的交流输入电压幅值检测电路，它具有结构简单的优点，能够对强电和弱电进行隔离。
摘要（英）：

The invention discloses an alternating current input voltage magnitude test circuit for a power factor correction control circuit. The power factor correction control circuit comprises a central processor. The alternating current input voltage magnitude test circuit of the invention comprises a voltage transformer and a half-wave rectifier and filter circuit connected with the output end of the voltage transformer, wherein the output end of the half-wave rectifier and filter circuit is connected with the central processor; and the half-wave rectifier and filter circuit comprises a diode D connected between the two output ends of the voltage transformer, a first resistor R1, a second resistor R2 and a capacitor C connected between the two ends of the second resistor R2 in parallel; and one end of the capacitor C is connected with the central processor. The alternating current input voltage magnitude test circuit for the partially chopping power factor correction control circuit has the advantage of simple structure and can isolate strong current from weak current.

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