Research and Design of Vehicle Inverter Power Supply Based on DSP

This article designs a vehicle-mounted inverter power supply with TMS320F28335 as the main control chip, which converts 12V DC voltage to 220V/50Hz AC voltage. The system uses a two-stage conversion circuit structure, including a front-stage DC-DC push-pull boost circuit and a back-stage DC-AC full-bridge inverter circuit. The front stage pushpull selects the SG3525 chip as the main control chip of the push-pull circuit, which uses voltage closed-loop control; the rear-stage DC-AC inverter circuit adopts a dual closed-loop PI control strategy of output voltage outer loop and current inner loop. Finally, a 500W experimental prototype was built and various performance index tests were carried out. The test results show that the design in this paper. The indicators of the on-board inverter power supply meet the design requirements.