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The Designated Harmonic Suppression for SPWM

机译：SPWM的指定谐波抑制

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摘要

SPWM is a critical method used in asynchronous motor-driven area. But harmonic components of inverter output wave impair its application in motor speed control. A new mixed algorithm was proposed for SPWM, which was a designated harmonic suppression technology by way of improved regular sampling in low voltage and low frequency and harmonic elimination in high voltage and high frequency. This algorithm was based on both analysis of sampled SPWM and Fourier series transform method and aimed at eliminating some odd harmonic components to obtain an identical sine wave. After explication of the harmonic elimination procedure and real time calculation process, an effective control mode and its control circuit were put forward so that the designated harmonic suppression made a reality. Applied it in whole speed adjusting range, the voltage can be conveniently controlled and high frequency harmonic components of SPWM are also improved.
机译：SPWM是异步电动机驱动领域中使用的一种关键方法。但是变频器输出波的谐波成分会削弱其在电动机速度控制中的应用。提出了一种新的用于SPWM的混合算法，该算法通过改进低电压和低频的常规采样以及高电压和高频的谐波消除，成为一种指定的谐波抑制技术。该算法基于对采样SPWM的分析和傅立叶级数变换方法，旨在消除一些奇次谐波分量以获得相同的正弦波。在阐述了谐波消除过程和实时计算过程之后，提出了一种有效的控制方式及其控制电路，使指定的谐波抑制得以实现。在整个调速范围内使用，可以方便地控制电压，并改善了SPWM的高频谐波分量。

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