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发明公开
CN1428922A 功率因数校正的方法及其装置 失效 - 权利终止 转让

功率因数校正的方法及其装置
摘要：
一种功率因数校正的方法及其装置，升压式直直变换器主功率变换电路将经过EMI滤波的交流电源整流后升压输出；双环控制电路检测该升压式直直变换器主功率变换电路的内环电流和输出电压，并根据该检测结果控制该升压式直直变换器主功率变换电路的输出；该升压式直直变换器主功率变换电路中设有两个相互并联的升压式直直变换器，该双环控制设有电流检测电路、电压反馈及外环控制电路和峰值电流型内环PWM控制电路；并通过两路交错互补，相位互差180度的PWM控制信号分别控制该两个升压式直直变换器的主开关管。
摘要（英）：

The present invention relates to a method for power factor correction and its equipment. It is characterized by that after the A.C. power supply filtered through EMI is rectified by main power conversion circuit of boost DC/DC converter, it can be boosted and outputted; its dual loop control circuit can be used for detecting the innel loop current and output voltage of main power conversion circuit of said boost DC/DC converter, and controlling output of main power conversion circuit of said boost DC/DC converter according to the detected result. The main power conversion circuit of said boost DC/DC converter has two mutually-parallelly connected DC/DC converters. Said dual loop control has current detection circuit, voltage feedback and out loop circuit and peak value current type inner ring PWM control circuit, and utilizes two PWM control signals to respectively

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