新型PWM方法的研究

A RESEARCH ON NEW METHODS OF PWM TECHNIQUES

在改善输出波形特性的基础上,提出了一种新型的脉宽调制方法,该方法基于三相线电压之间的基本关系来获得开关定时和开关脉冲图,并利用GTO逆变器和TP86A单板机在电压型逆变器上进行了实验。从理论分析和实验结果得出:这种新型PWM技术输出波形的谐波分量低,控制具有规律性,在交流调速和逆变电源方面是一种值得推广的方法。

On the basis of improvment of the output waveform properties, this paper presents a new method for Pulse Width Modulation. This paper illustrates the way how to abtain the switch time and the switch pulse diagram. The experiment of a voltage, power was made, which was supported by a single board microproccessor TP86A and a GTO inverter. We can conclude from the theoretical and practical results that this new way of PWM technique possesses the advantages of better output waveform and regularity in control. Thus it is worth spreading widely in the field of AC motor speed control and reversed power supply.