基于低开关频率的不连续载波PWM

2014 16th International Power Electronics and Motion Control Conference and Exposition Pub Date : 2014-12-11 DOI:10.1109/EPEPEMC.2014.6980592

S. Halász

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引用次数: 4

摘要

在超高速交流驱动中，载频与基频之比可低于20-30。对于这种低逆变器开关频率，研究了所有可能的不连续PWM方法，并观察到基于载波的自然和规则PWM的直流分量和次谐波会对驱动质量产生相当大的负面影响。对不同断续PWM的研究和计算表明，60°箝位时直流分量和次谐波电压最小，30°滞后箝位和30°箝位时直流分量和次谐波电压最差。通过实验验证了计算结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Discontinuous carrier-based PWM with low switching frequency

In ultra high speed ac drives the ratio of the carrier frequency to fundamental one can be lower than 20-30. For this low inverter switching frequency all the possible discontinuous PWM methods are investigated and it is observed that dc components and subharmonics of carrier-based natural and regular PWMs can have considerable negative effect on the quality of the drive. The investigation and the computation of different discontinuous PWM showed that the dc components and the subharmonic voltage have the lowest values for PWM with 60°clamping to DC bar and the worst situation is related to 60°clamping to DC bar with 30° lagging clamp as well as to 30° clampine. The computation results are confirmed by experiments.

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2014 16th International Power Electronics and Motion Control Conference and Exposition

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