【摘要】 介绍了一种针对中小功率单相、两相和三相负载的通用逆变器。为使控制系统简单可靠,采用了基于PIC16F87X单片机控制的PWM发生器SA4828专用芯片。单片机具有单字节指令,内置闪存程序存储器,可实现在线编程和调试。通过简单的软件编程和设置,可控制SA4828产生3种不同的PWM波形(纯正弦型、3次谐波增强型的和带死区增强型),输出对称的单相、两相或三相逆变器的控制信号。文中给出了样机在不同工作方式下PWM控制信号的输出波形和逆变器负载电流波形,实验结果证明了该通用逆变器的可行性。更多还原

【Abstract】 In this paper,a universal PWM inverter for 1～3 phase AC drives or AC/DC/AC power conversion systems is introduced.The control system is based on the dedicated PWM generating chip SA4828 and PIC16F87X single-chip computer.The PIC16F87X has single byte instructions and FLASH program memory which can be programmed and debugged online. Through simple software programming,the symmetric 1,2 or 3-phase PWM signals can be output to control the inverter for different applications. The experimental results of a prototype show the feasibility of the proposed universal inverter.更多还原