Common-Mode Voltage Harmonic Reduction in Variable Speed Drives Applying a Variable-Angle Carrier Phase-Displacement PWM Method

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....

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Bibliographic Details
Published inEnergies (Basel) Vol. 14; no. 10; p. 2929
Main Authors Marquez Alcaide, Abraham, Monopoli, Vito Giuseppe, Wang, Xuchen, Leon, Jose I., Buticchi, Giampaolo, Vazquez, Sergio, Liserre, Marco, Franquelo, Leopoldo G.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2021
Subjects
Displacement
Electric potential
Harmonic distortion
Harmonic reduction
Hydraulic equipment
metaheuristic search algorithms
power converters
pulse-width modulation
Reliability analysis
System effectiveness
System reliability
Variable speed drives
Voltage
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14102929