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Control strategy for a hybrid five-level three-phase PWM rectifier using twelve switching devices

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2 Author(s)
Itoh, J.-I. ; Nagaoka Univ. of Technol., Niigata ; Adachi, T.

This paper proposes a new circuit topology for a multilevel PWM rectifier. The proposed circuit combines a diode clamp type topology with a flying capacitor type topology. As a result, the proposed circuit uses only 12 switches, despite the use of a five-level three-phase PWM rectifier. Further, the proposed circuit can obtain good performance as same as to a conventional multilevel circuit. This paper describes the features of the proposed topology; the control strategy and loss analysis using circuit simulation. In addition, the basic operation of the proposed method is confirmed by simulation and experimental results. The proposed converter achieved 3.4% THD for the input current and 97.4% efficiency for a 1 kW class experimental setup.

Published in:

Control and Modeling for Power Electronics, 2008. COMPEL 2008. 11th Workshop on

Date of Conference:

17-20 Aug. 2008

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