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New multilevel rectifier based on series connection of H-bridge cell

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2 Author(s)
Lin, B.-R. ; Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan ; Lu, H.-H.

A three-level pulse-width modulation (PWM) rectifier is proposed. The control scheme is based on general logic gates to generate a three-level voltage waveform. In comparison with the two-level PWM scheme, the three-level PWM scheme can reduce the electromagnetic interference, decrease voltage stress of power semiconductors, and increase the switching frequency. A capacitor voltage compensator is used to balance two DC bus voltages. Based on the proposed control algorithm, the current harmonics of the line meet the International Electrotechnical Commission 1000-3-2 limits. The power factor of the proposed rectifier is nearly unity. The control strategy of the proposed three-level rectifier illustrates its validity and effectiveness experimentally

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:147 ,  Issue: 4 )