零电流准谐振Buck变换器的磁集成研究

以零电流准谐振Buck变换器为例,引入谐振电感和谐振电容与变换器中的功率开关管组成谐振开关.通过谐振,使流过功率开关管的电流呈正弦波形,为功率开关管创造了零电流开关条件.对分立的谐振电感和滤波电感进行磁集成,阐述集成后Buck变换器工作原理.用Saber软件对集成后的电路进行仿真.分析谐振电感和滤波电感的耦合系数对谐振...

Research on magnetic integrated for zero-current quasi-resonant buck converter

Taking Buck converter as an example,the resonant inductor and resonant capacitor were introduced,which constituted the resonant switch with the converter power switch.Through the resonance,the waveform of current through the power switch became sinusoidal,which created zero-current switching condition for power switch.In this paper,the discrete resonant inductor and filter inductor were integrated to integration magnetic,and the principle of integration Buck converter works was described.The integration of circuit was simulated by Saber software,and the effect of coupling coefficient of the resonant inductor and filter inductor on the resonant frequency and output voltage was analyzed.The loosely coupled and tightly coupled integration approach was applied to design a ZCS Buck converter,and the zero-current turn-on and zero-current turn-off of power switch was achieved,and was authenticated by saber.