摘要
LLC谐振变换器基于软开关技术,具有开关损耗低、功率密度大、电压输入范围宽等优点。但在设计高电压直流输入的LLC谐振变换器时,受限于半导体工艺技术,开关管的最高工作电压无法满足电路要求。针对此问题,提出使用多个开关管串联来实现高压应用的目的。首先分析金属氧化物半导体场效应晶体管(MOSFET)的工作特性,然后采用软开关技术和LLC谐振技术,设计基于4个MOSFET串联的半桥LLC谐振电路,最后搭建一台直流输入300 V、直流输出40 V、功率100 W的测试样机,以验证电路的可行性。
The LLC resonant converter is based on soft-switch technology with low switching loss,high power density and wide voltage input range.However,when designing a high-voltage direct current input LLC resonant converter,limited by semiconductor process technology,the maximum operating voltage of the switching transistor may not meet the needs of the circuit.For this problem,multiple power switch tubes in series to achieve the purpose of high voltage applications is used.Firstly,the working characteristics of the metal oxide semiconductor field effect transistor(MOSFET)are analyzed.Then,the soft-switch technology and LLC resonance technology are used to design the half-bridge LLC resonant circuit based on four MOSFET connected in series.Finally,a prototype with direct current 300 V input,direct current 40 V output and 100 W power is built to verify the feasibility of circuit design.
作者
李凯
罗续业
李彦
LI Kai;LUO Xu-ye;LI Yan(National Ocean Technology Center,Tianjin 300112,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第6期21-25,共5页
Power Electronics
基金
海洋公益性行业科研专项(201505015)。
