基于BUCK电路的新型软开关电路设计

本文对采用N沟道增强型MOSFET作开关器件的Buck电路进行了软开关的设计和仿真。用到的方案是准谐振充放电模式,使MOSFET漏源极两端的电压能在栅极触发脉冲到来前变为零,使开关管能进行零电压开通。这样就能有效地实现Buck电路的软开关,提高电路的效率。最后利用Saber仿真软件,对设计的软开关控制策略进行了仿真验证,结果与预期相符合。

This article presents a soft switching method of the Buck converter which uses the Nchannel enhancement type MOSFET as the switch and the simulation.The design is quasi resonant charging and discharging mode which makes the D-S voltage become zero before the gate trigger pulse come,so the MOSFET can operate in a zero voltage turn-on mode.In this way,it can effectively realize the soft switching of Buck converter and improve the eff iciency of the circuit.Finally I use the saber software to do the simulation and receive the expected result.