基于MSP430F449的三相正弦逆变变频电源设计

Design of three-phase sinusoidal frequency conversion power supply based on MSP430F449

三相正弦逆变变频电源是将直流电转换成频率可调的三相正弦交流电的电源装置,是目前电力电子技术正在致力研究的一个课题。本文介绍的方法是使用单片机实现电源逆变控制,逆变波形由单片机存储的数据表定义,可对波形进行数值补偿和根据要求灵活变化波形。设计中应用MSP430F449定时器B产生6路按正弦规律变化的PWM信号,PWM信号驱动三路逆变电路,逆变后经滤波输出三相正弦交流电。

Three-phase sinuseidal frequency conversion power supply is the device which can change DC power into three-phase sinusoidal AC power with adjustable frequency; it is the subject which electric power and electron technique is devoted to research in recent years. The method introduced in this paper is to use single chip computer to achieve the control of inverse transform process, to use the data sheet stored in single chip computer to define the waveform,and to make reparation or changes for the waveform when it is required. The timer B of MSP430F449 is used to produce 6 routes of sinusoidal PWM signal which can control three routes inverse transform circuit. After inverse transform and filtering,three-phase sinusoidal AC power supply can be obtained.