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交流变频装置谐波及其抑制措施分析
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2009-08-10
贾飞世
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交流变频调速以其可靠、节能、调速性能好等原因正在生产和生活各个领域得到广泛应用。但是变频器自身的原理和线路特点，也带来了由谐波引起的种种问题。本文以交直交型的变频器为例分析了交流变频调速装置主电路产生谐波的原因，分析了其整流电路、逆变电路的谐波的特点，并指出了谐波对于电网、其他用电设备、拖动系统自身的影响。最后指出抑制谐波干扰的几个重要措施。本文对于变频器的设计与应用，具有一定的现实指导意义。
关键词：变频装置 主回路 谐波
Abstract: For the excellent performance on reliability, energy saving and features of driving machines, frequency converter drive systems have been widely applied in areas of production and daily life. However, the theories and circuits of frequency converter results in the vital problems of harmonics. This paper analyzed the reasons of harmonics happening and the features of harmonics in AC-DC-AC frequency converter drive system’s main circuit. The affections of harmonics to the electricity power net, other devices of electricity consumption and the drive system itself were pointed out. At last, methods of restraining harmonics interference were suggested. This paper is practical for frequency converter design and application.
Keywords: Frequency converter, Main circuit, Harmonics
关键词：变频装置 主回路 谐波
Abstract: For the excellent performance on reliability, energy saving and features of driving machines, frequency converter drive systems have been widely applied in areas of production and daily life. However, the theories and circuits of frequency converter results in the vital problems of harmonics. This paper analyzed the reasons of harmonics happening and the features of harmonics in AC-DC-AC frequency converter drive system’s main circuit. The affections of harmonics to the electricity power net, other devices of electricity consumption and the drive system itself were pointed out. At last, methods of restraining harmonics interference were suggested. This paper is practical for frequency converter design and application.
Keywords: Frequency converter, Main circuit, Harmonics
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