以单片机AT89S52和定时器8254控制HEF4752生成SPWM波来控制主功率电路输出电压、频率均可变的三相交流电，并实现变频器功能设定、变频操作、频率显示。采用MCS-51指令编写，使用Keil uVision3编译调试。-Use MCU AT89S52 and timer 8254 to control HEF4752 generate SPWM wave to control the main power circuit to output three-phase AC, whose

系统以STM32单片机作为核心控制芯片，利用其内部的PCA模块产生SPWM信号，再通过脉冲分配电路、逆变功率驱动电路和LC串联滤波电路获得三相逆变器50Hz正弦波功率信号的输出。(System to STM32 microcontroller as the core control chip, SPWM signal generated by PCA module inside, and then through the output pulse distribution circuit, in

输出spwm信号，用于直流变交流逆变的信号(spwm signal Output SPWM signal for DC/AC Inverters)