摘要
研究使用TMS320F240在线生成用于中小功率的逆变器的SPWM波形。利用同步调制法、对正弦函数值的查表,实时计算采样周期、电压幅值及输出脉宽,并将这些时间计数值送入TMS320F240事件管理器EV中的定时器,利用定时中断向接口电路送出相应的高低电平,实时产生SPWM波形。此方法可广泛的用于电力变换器与VVVF交流电机变频调速控制系统。
The paper investigates the application of TMS320F240 in generating a series of SPWM waveform signals online for inverter systems. Using the algorithm of modulation, a numeration of sine function, realtime sampling cycle, voltage amplitude, and pulse-width are achieved and the time values are put into the timers of the special event manager EV in TMS320F240. Then through timing interrupt the high-low voltages are sent to the interface circuits to generate realtime SPWM waves. This method ean be applied to inverter systems and VVVF motor control system.
出处
《微计算机应用》
2004年第5期571-575,共5页
Microcomputer Applications
