PWM strategy for common-mode voltage reduction in three-phase variable-speed drives with active front end

Electric variable speed drives (VSD) have been replacing mechanic and hydraulic systems in many sectors of industry and transportation because of their better performance and reduced cost. However, the electric systems still face the issue of being considered less reliable than the mechanical ones. For this reason, researchers have been actively investigating effective ways to increase the reliability of such systems. This paper is focused on the analysis of the common-mode voltage (CMV) generated by the operation of the VSDs which directly affects to the lifetime and reliability of the complete system. The method is based on the mathematical description of the harmonic spectrum of the CMV depending on the PWM method implementation. A generalized PWM method where the carriers present a variable phase-displacement is developed. As a result of the presented analysis, the CMV reduction is achieved by applying the PWM method with optimal carrier phase-displacement angles without any external component and/or passive filtering technique. The optimal values of the carrier phase-displacement angles are obtained considering the minimization of the CMV total harmonic distortion. The resulting method is easily implementable on mostly off-the-shelf mid-range micro-controller control platforms. The strategy has been evaluated in a scaled-down experimental setup proving its good performance.

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Common Mode Voltage Elimination in Variable Speed Drives for Improved Electrical Safety

IEEE Transactions on Industry Applications ◽

10.1109/tia.2020.2992585 ◽

2020 ◽

pp. 1-1 ◽

Cited By ~ 1

Author(s):

Galina Mirzaeva ◽

Douglas Carter ◽

S M Muslem Uddin ◽

Peter Stepien

Keyword(s):

Electrical Safety ◽

Variable Speed ◽

Common Mode ◽

Variable Speed Drives ◽

Common Mode Voltage

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Characteristic and Non-Characteristic Harmonics, Harmonic Cancellations and Relevant International Standards in Variable Speed Drives

Sultan Qaboos University Journal for Science [SQUJS] ◽

10.24200/squjs.vol7iss1pp123-136 ◽

2002 ◽

Vol 7 (1) ◽

pp. 123

Author(s):

Syed M. Islam

Keyword(s):

Single Phase ◽

Supply Voltage ◽

International Standards ◽

Wave Form ◽

Variable Speed ◽

Variable Speed Drives ◽

Front End ◽

Three Phase ◽

Research Findings ◽

Voltage Wave

This paper will present a review of characteristic harmonics in both single phase and three phase drive front end rectifiers, discuss recent research findings in identifying sources and production of non-characteristic harmonics and amplification of harmonic levels when the front end rectifiers are fed from non-ideal supply conditions. Significant amount of triplens may be generated due to unbalances in utility supply voltage wave form and anticipated harmonic levels may vary widely. The paper will also discuss international harmonic standards such as the AS 2279, IEEE 519, and IEC 61000 series applicable to rectifier loads. Finally, the paper will present techniques to reduce harmonic levels by mixing of single phase and three phase non-linear loads resulting from mutual cancellations.

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Boost diode rectifier for three-phase variable speed drives supplied from the single-phase mains: Analysis and design

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society ◽

10.1109/iecon.2012.6388634 ◽

2012 ◽

Author(s):

Petar J. Grbovic ◽

Philippe Delarue ◽

Philippe Le Moigne

Keyword(s):

Single Phase ◽

Phase Variable ◽

Variable Speed ◽

Variable Speed Drives ◽

Analysis And Design ◽

Three Phase

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Opposite Triangle Carrier with SVPWM for Common-Mode Voltage Reduction in Dual Three Phase Motor Drives

Energies ◽

10.3390/en14020282 ◽

2021 ◽

Vol 14 (2) ◽

pp. 282

Author(s):

Seon-Ik Hwang ◽

Jang-Mok Kim

Keyword(s):

Electromagnetic Interference ◽

Pulse Width Modulation ◽

Motor Drives ◽

Common Mode ◽

Pwm Inverter ◽

Common Mode Voltage ◽

Voltage Vector ◽

Three Phase ◽

The Common ◽

Zero Voltage

The common-mode voltage (CMV) generated by the switching operation of the pulse width modulation (PWM) inverter leads to bearing failure and electromagnetic interference (EMI) noises. To reduce the CMV, it is necessary to reduce the magnitude of dv/dt and change the frequency of the CMV. In this paper, the range of the CMV is reduced by using opposite triangle carrier for ABC and XYZ winding group, and the change in frequency in the CMV is reduced by equalizing the dwell time of the zero voltage vector on ABC and XYZ winding group of dual three phase motor.

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