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Comparison of single-sensor current control in the DC link for three-phase voltage-source PWM converters

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

This paper presents a technique for reconstructing converter line currents using the information from a single current sensor in the DC link of a converter and comparative evaluation of the performance of single sensor control techniques in the DC link for voltage-source pulsewidth modulation (V-S PWM) converters. When 3φ input currents cannot be reconstructed, three methods to acquire the DC-link current are compared. Two of them are methods of modifying the switching state (I, II), and another is a method of using the predictive state observer. Also, compensation of sampling delay, and a simultaneous sample value of input currents in the center of a switching period are included. Suitable criteria for the comparison are identified, and the differences in the performance of these methods are investigated through experimental results for a typical V-S PWM converter rated at 10 kVA

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Industrial Electronics, IEEE Transactions on  (Volume:48 ,  Issue: 3 )