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http://dx.doi.org/10.11142/jicems.2012.1.3.366

Low Frequency Multi-Level Switching Strategy Based on Phase-Shift Control Methods  

Lee, Sang-Hun (Dept. of Electrical Design, Korea Lift College)
Song, Sung-Geon (Digital Convergence Research Center, KETI)
Park, Sung-Jun (Dept. of Electrical Engineering, Chonnam National University)
Publication Information
Journal of international Conference on Electrical Machines and Systems / v.1, no.3, 2012 , pp. 366-371 More about this Journal
Abstract
In this paper, we propose an electric circuit using one common-arm of H-Bridge inverters to reduce the number of switching components in the multi-level inverter combined with H-Bridge inverters and transformers. And furthermore, we suggested a new multi-level PWM inverter using PWM level to reduce THD (Total Harmonic Distortion). We use a phase-shift switching method that has the same rate of usage at each transformer. Also, we test the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of the control signal for the proposed multi-level PWM inverter.
Keywords
H-Bridge Inverter; THD (Total Harmonic Distortion); phase-shift switching method;
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