摘要
根据传统硬开关电源引起的不良影响,提出了一种新型软开关BUCK变换器,使得高低桥MOSFET管都能在不管是轻负载或者重负载情况下达到ZVS状态。在连续导电模式(CCM)和高负载电流情况下,上桥MOSFET管开通,下桥MOSFET管侧的二极管在死区时间内导电,这样就造成了上桥MOSFET管的开关损耗。新型软开关BUCK变换器在传统BUCK变换器的基础上加入了电感和电容,在外加电感电容的情况下,在CCM下的死区时间内的电感电流可以有效地从下桥二极管整流到上桥二极管中。根据仿真结果和工作模式分析验证其性能。
According to the adverse effects caused by traditional hard switching power supply. This paper puts forward a new type of soft switch buck converter, makes MOSFET tube can achieve ZVS condition under the light or no load,as well as full load conditions. In continuous conduction mode（CCM） or high load current case, the bridge of the high side MOSFET open, diode of low side MOSFET conduct in dead time, thus caused the high side MOSFET switch loss. Proposed soft-switching buck converter consists of the additional inductance and capacitance on the basis of conventional buck converter, the inductor current in CCM can be effectively commutated from the low side body diode to the high side body diode of the two MOSFETs during the dead time. According to the simulation results and the working modems verify its performance.
出处
《信息技术》
2014年第6期1-3,8,共4页
Information Technology
基金
国家自然科学基金面上项目(61074016)
上海市教育委员会科研创新项目(09YZ214)
