Research On The High Efficiency Switching Power Supply With A Small Fish Drying Machine

The use of electricity for the fish drying machine energy more environmental health,switching power supply demand of high-power and high efficiency increasing green.The power factor correction(PFC)technique and phase shifted PWM technique in small dried fish drying machine with high efficiency in switching power supply.Small fish drying machine the design of the power switch PFC circuit used in high efficiency interleaved PFC technology is very suitable for high power switching power supply,switching power supply compared to the ordinary PFC technique can only be applied to small and medium power,it can reduce the power loss,reduce the ripple current and current power devices should be reduced the advantages of power switch tube.Using the DC/DC transform circuit is followed by phase shift PWM control technology based on adding a full bridge converter circuit quasi resonant technique,the switch conduction mode at zero voltage,the soft switch technology,reduces the loss of switch power supply.The small fish drying machine to improve the efficiency of switching power supply.This paper designed a small fish drying machine with 1200 W with the phase shifting function of power factor correction of full bridge quasi resonant switching power supply.Based on the analysis of the principle of two stage power factor correction(PFC)technology and the characteristics of other PFC technology,the parameters of the PFC circuit and the design of the device are given.Through the analysis of all kinds of DC/DC converter circuit,this paper uses the phase shifted full bridge quasi resonant PWM scheme and analyzes the conditions of realizing soft switching zero voltage conduction mode.In addition to the main circuit in addition to design of auxiliary power supply of the flyback topology,finally according to the design data of the assembly switch small drying machine power dried fish experimental model,and test the output voltage of the auxiliary power supply,DC-DC static and dynamic debugging waveform transform circuit,PFC circuit to measure static and dynamic output waveform and debugging.