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A Novel ZCS PWM Half- bridge Converter

发布时间:2008/6/5 0:00:00 访问次数:414

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    • a novel zcs pwm half- bridge converter

    2005年11月11日 浏览次
    摘要：阐述了零电流开关（zcs）技术在半桥变换器电路中的应用。从电路原理、各工作模态进行了分析，并给出了实验结果。着重分析了主开关管和辅助开关管零电流开通和关断的过程及实现条件。该电路主要针对存在拖尾电流的igbt设计,可以提高igbt的工作频率。

    关键词：零电流开关；半桥变换器；谐振网络；igbt

    introduction

    in order to improve the whole efficiency of the electronic equipment, the search for more efficient soft switching technique has been developed. for switch such as igbt,the zero- current switching(zcs) and zero-current transition(zct)technology have been frequently used, because this method can reduce the current rapidly when igbt turns off, therefore reducing the energy loss caused by the tail current [1][2][3][4][5].

    but the zero-current switching circuit that mostly used is not input-out-isolated, so the application in the practice has not been generalized. this paper proposed the zcs technique realized by the half bridge converter, both the main switch and auxiliary switch in the topology work in soft switching state, the turn-on current stress and turn-off voltage stress is small.

    1 operational principles

    fig.1 shows the circuit diagram of the half-bridge converter. in the schematic, lr1 to lr4 are resonant inductors, the cr is resonant capacitor, s1 and s2 are main switches, s3 and

    a novel zcs pwm half- bridge converter - 中国电子市场
    电子市场首页 | 会员登录 | 电子人才 | 帮助
  • 电子论坛
  • 会员助手
  • 技术资料
  • 电子资讯
  • 非ic
  • ic

    • a novel zcs pwm half- bridge converter

    2005年11月11日 浏览次
    摘要：阐述了零电流开关（zcs）技术在半桥变换器电路中的应用。从电路原理、各工作模态进行了分析，并给出了实验结果。着重分析了主开关管和辅助开关管零电流开通和关断的过程及实现条件。该电路主要针对存在拖尾电流的igbt设计,可以提高igbt的工作频率。

    关键词：零电流开关；半桥变换器；谐振网络；igbt

    introduction

    in order to improve the whole efficiency of the electronic equipment, the search for more efficient soft switching technique has been developed. for switch such as igbt,the zero- current switching(zcs) and zero-current transition(zct)technology have been frequently used, because this method can reduce the current rapidly when igbt turns off, therefore reducing the energy loss caused by the tail current [1][2][3][4][5].

    but the zero-current switching circuit that mostly used is not input-out-isolated, so the application in the practice has not been generalized. this paper proposed the zcs technique realized by the half bridge converter, both the main switch and auxiliary switch in the topology work in soft switching state, the turn-on current stress and turn-off voltage stress is small.

    1 operational principles

    fig.1 shows the circuit diagram of the half-bridge converter. in the schematic, lr1 to lr4 are resonant inductors, the cr is resonant capacitor, s1 and s2 are main switches, s3 and

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