Research on Digital Vehicle Inverter Power Supply

With the development of economy and the improvement of the level of science and technology, the car has become a set of office, entertainment as one of the vehicles, the car electronic products are more and more rich, in order to ensure the normal use of the car electronic equipment, must be configured to convert the 12 V direct current of the car into the appropriate alternating current. This paper designs a TMS320F28335 as the main control chip of the vehicle inverter power supply, the car DC voltage into 220 V/50 Hz AC voltage. The system adopts a two-stage conversion circuit structure. SG3525 chip is used as the main control chip of the push-pull circuit at the front stage, and voltage closed-loop control is adopted. The post-stage DC-AC inverter adopts a double closed-loop PI control strategy of the outer loop of output voltage and the inner loop of current. The system control strategy is simulated by MATLAB simulation software, and the correctness of the system design scheme and control strategy is verified.