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A novel control method for three-phase PWM rectifiers using a single current sensor

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3 Author(s)
Woo-Cheol Lee ; Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea ; Dong-Seok Hyun ; Taeck-Kie Lee

This paper proposes a control method for three-phase voltage-source PWM rectifiers using only a single current sensor in the DC-link. A PWM modulation strategy for reconstructing three phase currents from the DC-link current is given. When 3φ input currents cannot be reconstructed, a method for modifying the switching state of the PWM rectifier and a method for the predictive state observer is proposed. Compensation of the 2 sampling delays is also included, and this method is combined with all of the experiments. Performance differences between the two methods in a typical voltage source PWM rectifier are investigated experimentally

Published in:

IEEE Transactions on Power Electronics  (Volume:15 ,  Issue: 5 )