Modern AC/DC converters with bidirectional power flow employing PWM boost topology generate harmonic distortions of input current in relatively high frequency range tightly related to modulation carrier frequency. These frequencies and its multiples in typical applications are usually located in frequency range from single up to several of kHz. Increased harmonic emission in this frequency range can easily and harmfully influence sensitive control and measurement systems what occurs more often nowadays in applications where high power AC/DC PWM boost converted are used. This paper presents a comparison of current harmonic emission of PWM boost rectifiers with relation to classic diode rectifiers. New class of electromagnetic compatibility problems arising in power system are underlined as a result of increased harmonic distortions emission in frequency range up to 9 kHz.
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机译:具有双向电流的现代AC / DC转换器采用PWM升压拓扑,在与调制载波频率紧密相关的相对高频范围内产生谐波扭曲。典型应用中的这些频率及其倍数通常位于频率范围内,从单个到几个KHz。这种频率范围内的谐波发射增加可以容易且有害地影响敏感控制和测量系统,现在使用高功率AC / DC PWM升压转换的应用中的更常见发生的情况。本文介绍了与经典二极管整流器相关的PWM升压整流器的电流谐波发射的比较。由于频率范围高达9 kHz的谐波扭曲发射增加,电力系统中出现的新类电磁兼容性问题下划线下划线。
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