期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 10, 页码 11662-11672出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3172657
关键词
Common-mode voltage; conducted EMIs; five-phase VSI; power losses; sigma-delta modulation; total harmonic distortion
资金
- Ministerio de Ciencia, Innovacion y Universidades of Spain [TRA2016-80472-R, PID2019-111420RB-I00, 496458]
- Secretaria d'Universitats i Recerca del Departament d'Empresa i Coneixement de la Generalitat de Catalunya
Various Sigma-Delta modulation techniques are proposed and evaluated to reduce the maximum peak-to-peak amplitude of common-mode voltage in a high-frequency voltage source inverter. These techniques achieve high-efficiency converter operation, output voltage with low total harmonic distortion, reduction in CMV amplitude and transitions, and decrease in conducted EMI amplitude. The use of single-loop and double-loop Sigma-Delta modulators is analyzed and experimentally evaluated.
Various sigma-delta (Sigma Delta) modulation techniques for reducing the maximum peak-to-peak amplitude of common-mode voltage (CMV) by 80% in a five-phase, high-frequency voltage source inverter (VSI) are proposed and evaluated in this article. These techniques are based on choosing a set of vectors that limits the CMV amplitude. Operating the VSI under high-frequency pulsewidth modulations (PWM) generates a large number of changes in the CMV levels, which leads to common-mode currents (CNICs) and conducted electromagnetic interferences (EMIs). The proposed modulation techniques achieve the following: 1) High-efficiency converter operation and output voltage with low total harmonic distortion (THD); 2) an 80% reduction in CMV peakto-peak amplitude; 3) a decrease in the number of the CMV transitions, thus reducing the CMCs; and 4) a decrease in the conducted EMI amplitude. The use of single-loop and double-loop Sigma Delta modulators is analyzed by means of Matlab/Simulink and PLECS simulations. The implementation of the proposed modulation techniques has been experimentally evaluated using a five-phase VSI with silicon carbide semiconductors. In order to demonstrate the improved performance, the results obtained are compared with those of other PWM and space vector modulation techniques that also mitigate the CMV amplitude by 80% but lack the other improvements.
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