针对多相变频器生成波形路数多、注入低次谐波后计算复杂等问题，提出了一种基于DSP+FPGA控制平台的多相SPWM算法，其核心部分采用等效面积法实现波形生成，能够注入幅值可控的低次谐波。将该算法应用到6相感应电机变频调速系统中，实验结果表明了该算法的可行性和优越性，具有计算速度快、精度高、可扩展性强等优势，系统性能指标达到设计要求。%With the problems of too many waveforms of multiphase inverter and complicated calculation when considering the low harmonics and so on,presented a kind of multiphase SPWM algorithm based on DSP+FPGA control platform,the core part adopted the equivalent area method to realize the generation of waveforms,and could inject the amplitude controllable low harmonics. Applying the algorithm to the six phase induction motor variable frequency speed control system,the experiment results show the feasibility and superiority of the proposed algorithm, and the advantages of fast calculation speed,high precision and strong scalability,the system performance indicators achieve the design requirements.
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