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http://dx.doi.org/10.5370/JEET.2017.12.2.701

Five-Level PWM Inverter Using Series and Parallel Alternative Connection of Batteries  

Park, Jin-Soo (Dept. of Control and Instrumentation Engineering, Hanbat National University)
Kang, Feel-soon (Dept. of Electronics and Control Engineering, Hanbat National University)
Publication Information
Journal of Electrical Engineering and Technology / v.12, no.2, 2017 , pp. 701-710 More about this Journal
Abstract
This paper presents a five-level PWM inverter using series and parallel connection of voltage sources. The alternative connection is done by an auxiliary circuit consisted of a switch, three diodes, and two batteries. The auxiliary circuit is located between input dc voltage source and H-bridge cell. Thanks to the auxiliary circuit, the proposed inverter synthesizes five-level output voltage in an effective way. Topologically both batteries are charged and discharged in the same rate, so it does not need to apply battery voltage balancing control method. Theoretical analysis of the proposed inverter is verified by computer-aided simulation and experiment based on a prototype of 1kW.
Keywords
Battery; H-bridge; Multilevel inverter; Pulse width modulation; Series and parallel connection; Total harmonic distortion;
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