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发明公开
CN108923377A 一种PFC电路的IGBT过流保护装置及方法 有权

一种PFC电路的IGBT过流保护装置及方法
摘要：
本发明公开一种PFC电路的IGBT过流保护装置及方法，包括：PWM控制模块；输入电压检测模块检测输入电压、设定硬件保护电压、比较输入电压与硬件保护电压生成硬件电压保护信号输出给PWM控制模块；输出电压检测模块检测输出电压；电流检测模块检测输入电流；电流过流保护模块设定硬件保护电流、比较输入电流与硬件保护电流生成第一硬件电流保护信号、第二硬件电流保护信号并将第二硬件电流保护信号传输给PWM控制模块；PWM控制模块根据硬件电压保护信号和第二硬件电流保护信号输出PWMout信号；PFC控制模块分别与以上各模块连接，接收输入电压、输入电流、第一硬件电流保护信号、输出电压，设定软件保护电流，根据各值输出PWM信号给PWM控制模块，并控制其输出PWMout信号。
摘要（英）：

The invention discloses an IGBT overcurrent protection apparatus and method of a PFC circuit. The IGBT overcurrent protection apparatus comprises: a PWM control module; an input voltage detection module detecting an input voltage, setting a hardware protection voltage, comparing the input voltage with the hardware protection voltage, generating a hardware voltage protection signal and outputting the hardware voltage protection signal to the PWM control module; an output voltage detection module detecting an output voltage; a current detection module detecting an input current; a current overcurrent protection module setting a hardware protection current, comparing the input current with the hardware protection current, generating a first hardware current protection signal and a second hardware current protection signal and transmitting the second hardware current protection signal to the PWM control module, wherein the PWM control module outputs a PWMout signal according to the hardware voltage protection signal and the second hardware current protection signal; and a PFC control module separately connected with the above modules, receiving the input voltage, the input current, thefirst hardware current protection signal and the output voltage, setting a software protection current, outputting a PWM signal to the PWM control module according to various values, and controllingthe PWM control module to output the PWMout signal.

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