The popular VSI (voltage source inverter) drives in use today are mostly PWM (pulse width modulated) drives. Harmonics produced by these drives cause heat losses, reduce the efficiency of the machine and also cause vibrations in the rotor. Active and passive filters are some of the methods to reduce the harmonics generated by these drives. A novel method is discussed which not only eliminates the 5/sup th/ harmonic but also any other negative sequence harmonics. This method, based on a reactor circuit, shows a reduction in harmonics and an improvement in the efficiency of the machine. The method can also reduce negative sequence harmonics produced by other nonlinear devices.

Meeting Name

IEEE Power Engineering Society Winter Meeting, 2002


Electrical and Computer Engineering

Keywords and Phrases

DC-AC Power Convertors; PWM VSI Drives; PWM Invertors; Efficiency Improvement; Harmonic Distortion; Harmonics Elimination; Harmonics Suppression; Heat Losses; Negative Sequence Harmonics; Power Conversion Harmonics; Power Quality Improvement; Power Supply Quality; Reactor Circuit; Rotor Vibrations; Voltage Source Inverters

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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