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http://dx.doi.org/10.6113/TKPE.2015.20.6.509

Overmodulation Characteristics of Carrier Based MVPWM for Eliminating the Leakage Currents in Three-Level Inverter  

Lee, Eun-Chul (Willings Co., Ltd.)
Choi, Nam-Sup (Division of Electrical, Electronic Communication & Computer Eng., Chonnam National University)
Ahn, Kang-Soon (Willings Co., Ltd.)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.20, no.6, 2015 , pp. 509-516 More about this Journal
Abstract
The overmodulation characteristics of a carrier-based medium vector pulse width modulation (CBMVPWM) are examined in this study. CBMVPWM can completely eliminate leakage currents in a three-phase, three-level inverter using only the switching states with the same common mode voltage even in an overmodulation operation. The analytic equations for the magnitude of the output voltage and the switching frequency are derived for overmodulation operation, and the effect of dead time on the leakage current is demonstrated. This study presents the operating principle of CBMVPWM, basic overmodulation features, and simulations and experiments for operating verification.
Keywords
Carrier based PWM; Common mode voltage; Leakage current; MVPWM(Medium Vector PWM); Overmodulation; Three-level inverter;
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