Design of Boost in the Front Stage of Low Voltage Inverters for Lithium Battery
At present,there is relatively little research and engineering application in the field of low-voltage invert-ers in China.To design a lithium battery low-voltage inverter that outputs stable sine waves of 220 V and 50 Hz,it is necessary to overcome the problems of circuit ripple,current,and device heat dissipation that occur during the process of boosting from the previous low-voltage to 400 V.By optimizing the circuit topology and PCB wiring in the voltage conver-sion circuit,boost main circuit,and control circuit,the ripple of the auxiliary power supply is reduced by 23.1 mV.Based on the selection and research of components,a front-end boost scheme suitable for lithium-ion battery low-voltage inverters is proposed.By adjusting the feedback circuit,the voltage of 3.2 V is steadily boosted to 400 V,which is used in the actual 3.2 V low-voltage inverter.This design method has certain reference significance for the research and appli-cation of other low-voltage inverters.
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