| 基于TMS320F240的SPWM调制信号的实现 |
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| 引用本文： | 罗小伟,李树广. 基于TMS320F240的SPWM调制信号的实现[J]. 微计算机应用, 2004, 25(5): 571-575 |
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| 作者姓名： | 罗小伟 李树广 |
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| 作者单位： | 上海交通大学电子信息与电气工程学院,上海,200240 |
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| 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。
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| 关 键 词： | TMS320F240 SPWM波形 同步调制法 数字信号处理器 DSP 正弦波脉宽调制 SPWM 事件管理器 EV |
The Implementation of Modulation Signals in a Spwm Mode Based on TMS320F240 |
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| LUO Xiaowei,LI Shuguang. The Implementation of Modulation Signals in a Spwm Mode Based on TMS320F240[J]. Microcomputer Applications, 2004, 25(5): 571-575 |
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| Authors: | LUO Xiaowei LI Shuguang |
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| Abstract: | 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. |
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| Keywords: | digital signal processor (DSP) TMS320F240 Event-Manager (EV) sine pulse-width modulation (SPWM) |
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