Journal ArticleDOI
Improvements in EMC performance of inverter-fed motor drives
Erkuan Zhong,Thomas A. Lipo +1 more
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TLDR
In this article, an experimental investigation of conducted radio-noise emission from a conventional pulse width modulated (PWM) inverter of medium power feeding an induction motor is described, and several low-cost strategies for improvement in EMI performance of the PWM inverter are then proposed.Abstract:
An experimental investigation of conducted radio-noise emission from a conventional pulse width modulated (PWM) inverter of medium power feeding an induction motor is described. It is determined that the inverter system generates considerable impulse currents through the power leads feeding the system resulting in serious conducted electromagnetic interference (EMI) problems and significant voltage waveform distortion in the power system. The dominant emission sources in the system are identified. A proposed model of the drive system for the purpose of evaluation of EMI are developed. Several low-cost strategies for improvement in EMC performance of the PWM inverter are then proposed. Experimental results demonstrate that disturbance from the modified system can be dramatically reduced, and that the EMC performance of the system has come very close to meeting the IEC CISPR and FCC limits on conducted emissions for digital devices.read more
Citations
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Multilevel inverter modulation schemes to eliminate common-mode voltage
TL;DR: In this paper, it is shown that inverters which have an odd number of levels can generate zero common-mode voltage by switching among certain states, and therefore motor bearing currents will be eliminated and conducted electromagnetic interference (EMI) will be reduced.
Journal ArticleDOI
An active circuit for cancellation of common-mode voltage generated by a PWM inverter
TL;DR: In this article, an active common-noise canceler (ACC) is proposed to eliminate the common-mode voltage produced by a PWM inverter, which can prevent an electric shock on a nongrounded motor frame and suppress motor shaft voltage.
Journal ArticleDOI
Multilevel inverter modulation schemes to eliminate common-mode voltages
TL;DR: In this article, the authors proposed an approach to eliminate common-mode voltage when using multilevel PWM inverters, which has an odd number of levels, by switching among certain states.
Journal ArticleDOI
Conducted electromagnetic emissions in induction motor drive systems. I. Time domain analysis and identification of dominant modes
TL;DR: In this article, the dominant high-frequency current paths are identified, and this allows the oscillation frequencies to be predicted from knowledge of the component values, and the analysis is confirmed using laboratory measurements.
Journal ArticleDOI
Conducted electromagnetic emissions in induction motor drive systems. II. Frequency domain models
TL;DR: In this article, the authors developed frequency domain models to evaluate the spectra of the conducted emissions directly, where the common and differential mode excitation sources were modeled in the frequency domain and related to the switching functions of the PWM inverter.
References
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Book
Analysis of Electric Machinery
TL;DR: In this paper, the authors focus on the areas of electric power and electric drives and emphasize analysis and formulation for control applications and computer simulation, and present an industry reference for these areas.
Book
Noise Reduction Techniques in Electronic Systems
TL;DR: In this paper, the authors present new chapters on controlling the emission from electronic systems, especially digital systems, and on low-cost techniques for providing electromagnetic compatibility (EMC) for consumer products sold in a competitive market.
Journal ArticleDOI
Leakage current reduction for a high-frequency carrier inverter feeding an induction motor
TL;DR: In this article, the authors present an analytical model of the system with leakage current and the strategy to suppress it, and two types of suppression circuits are discussed, the current-type circuit, although compact in size, not only acts as an excellent suppressor but also becomes a high-performance filter of the output voltage.
Journal ArticleDOI
Diagnosis and reduction of conducted noise emissions
Clayton R. Paul,K.B. Hardin +1 more
TL;DR: In this paper, a systematic method for the diagnosis and reduction of conducted noise emissions is described, which consists of a device for determining whether the differential or common-mode component of noise is dominant along with a simplified equivalent circuit of the power supply filter for each component.
Proceedings ArticleDOI
The influence of winding capacitance on high frequency time harmonic losses in induction motors
D. Maly,D.W. Novotny,C. Thompson +2 more
TL;DR: Tests demonstrate that equivalent magnetic connections, i.e., series vs. parallel connection for dual voltage motor designs, can have very different high-frequency characteristics and that variations in system grounding result in significant changes in resonant frequencies and losses.
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