In chapter 5 , the controller of resonant converter designed by myself , was introduced , in which zero current switching ( zcs ) had been realized 第五章介紹了自行設計的適合于不同諧振頻率的諧振變換器的控制器,實現(xiàn)了變換器的軟開關技術。
The principle and application of zero current switching boost pfc circuit are given . by introducing the development of ac / dc module with pfc the key techniques of the module are stressed on the engineering design . some problems are resolved such as the module is so small that spread the hot difficulty 從理論上分析和研究了零電流開關升壓式pfc電路的原理和應用,并結合250w帶pfc電路ac dc模塊的研制,從工程設計角度重點闡述了該模塊的關鍵技術,解決了模塊體積小、散熱困難及工藝等方面的難題。
" soft switching " is zero voltage switching or zero current switching , which the voltage ( or current ) of the switch varies by law of sine or quasi sine , the switch is on when its voltage reaches zero ( or switch is off when its current reaches zero ) by resonance . it makes switch loss is zero , so it can increase the operating frequency and raise power density , minimize the size of transformer and inductor “軟開關”是指零電壓開關或零電流開關,它是利用諧振原理,使開關變換器的開關管電壓(或電流)按正弦(或準正弦)規(guī)律變化,當電壓過零時,使器件開通(或電流自然過零時,使器件關斷) ,實現(xiàn)開關損耗為零,從而提高開關頻率,減小變壓器、電感的體積。