一种自体发光布驱动电源的SPWM实现

摘要

在一种自体发光布驱动电源的研制过程中，使用了一种基于等面积法的单极性SPWM波形脉冲宽度计算方法，针对PIC单片机产生SPWM波形的其参数进行分析，设计了产生SPWM波形所需参数的自动计算程序，并使用PIC16F883单片机和IR2110芯片成功驱动半桥逆变电路产生850 Hz110 V的交流电压，成功驱动自体发光布。%A Light Emitting PVC drive power was designed. A mothed of calcuting unipolar SPWM based on equivalent area algorithm was introduced, and the parameters using PIC16F883 for generating Sinusoidal Pulse Width Modulated signal were analyzed. Then a program for auto calculating the parameters using by PIC16F883 to generate SPWM signal was designed. The half-bridge inverter circuit based on IR2110 chip was successful y driven by the signal in generating a voltage of 850 Hz110 V AC, and the LEP normal wok was driven.