基于 FPGA 的可变频 SPWM 发生器的实现

摘要

采用一种峰值采样型SPWM 采样法，实现了基于 FPGA的输出频率在48Hz～52Hz的范围内可调的三相SPWM信号发生器，并接入三相PWM 逆变桥电路，通过滤波可得到稳定的正弦波形，仿真和实验结果表明该方法满足设计要求。%Adopted by a nonsymmetrlcal rules peak sampling method ,a three-phase SPWM pulse generator ,in which frequency is adjustable from 48 to 52 Hz ,is presented and realized based on FPGA .After connecting to the three-phase PWM inverter bridge and filtering ,the generator can output a steady AC sine-wave voltage .The simulative results and ex-perimental tests verify that the method meets the design requirment .