Abstract
This text introduced the modern Communication uses the basic construction of the switch power supply, analysis and designeds the main electric circuit, control the electric circuit, drive the electric circuit, protect the electric circuit and lends support to power supply etc. Each constitute the part.The article expatiated generally the ZVT-PWM moves mutually soft switch in whole bridge transformation electric circuit of principle and characteristics, the adoption moves mutually soft switch in ZVT-PWM in whole bridge transformation electric circuit of design method, used the big power in etc. in tube in switch in VMOSFET a machine in power transformation electric circuit piece, use in control electric circuit UC2875 etc. control a chip slice, adopted the electric voltage type the PWM and electric current type the PWM the control the mode, constitute the electric voltage electric current the double shuts the wreath feedback the control system.
Keywords: Correspondence switch power supply;Soft switch in ZVT-PWM; VMOSFET