基于STM32的变流器能量回馈系统设计与实现
Design and Implementation of Converter Energy Feedback System Based on STM32

能量回馈系统以全桥逆变电路和同步BOOST升压电路作为主电路，采用STM32单片机作为主控芯片，产生一路PWM波和双路互补的SPWM波通过以IR2103芯片为核心的驱动电路驱动上述核心电路的MOS管。系统通过OP07精密整流电路采集交流电流信号反馈至单片机，利用PID算法调节PWM波输出的占空比及SPWM波输出的调制比，从而控制系统的稳定输出。本设计能够实现输出频率在10~100 Hz范围内1 Hz步进可调，稳定输出不同恒定值设定下的工作电流，逆变得到的正弦波失真度控制在2%以下，能够有效实现能量的回馈利用，系统整体的效率可达到90%。
The energy feedback system uses a full-bridge inverter circuit and a synchronous BOOST booster circuit as the main circuit. And an STM32 microcontroller as the main control chip is used to generate one PWM wave and two complementary SPWM waves to drive the MOS tubes of the above core circuit through a drive circuit with the IR2103 chip as the core. The system collects the AC current signal through OP07 precision rectifier circuit and feeds it back to the microcontroller. The PID algorithm is used to adjust the duty cycle of the PWM output and the modulation ratio of the SPWM output to control the stable output of the system. This design can achieve 1 Hz step adjustment in the output frequency range of 10~100 Hz, and make the output stable at different constant value settings of the operating current, the inverter obtained sine wave distortion control below 2%, can effectively realize the energy return utilization, and the overall efficiency of the system can reach 90%.