摘要
SPWM(正弦脉宽调制)波是变频控制中常用的波形。文中提出了一种研究SPWM波的方法,首先离线计算SPWM波脉宽数据,存储到FPGA(现场可编程门阵列)的ROM中,FPGA用查表法产生SPWM波,再采集SPWM波信号并用LABVIEW软件进行频谱分析。用此方法实际产生了各种模式的SPWM波,并对其谐波进行预评估。将FPGA与LABVIEW相结合,可以很方便地获得优化的SPWM波控制模式,具有较高的实用价值。
SPWM wave is the most common use in control of frequency conversion. In this paper, we introduced a good method to generate and analyze SPWM wave. Firstly, we calculated the data of pulse-width offline. Secondly, these data were stored in the ROM of FPGA, which generated SPWM wave through lookup. Finally, the SPWM signals were sampled, and harmonics were analyzed through LABVIEW software. With this method, we generate and evaluate practically different modes of SPWM waves, it is easy to get optimized mode of SPWM in control based on FPGA and LABVIEW. This method is useful in practice.
出处
《电子工程师》
2005年第9期26-28,共3页
Electronic Engineer
