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

• Published in: IEEE transactions on industrial electronics (1982) Vol. 48; no. 3; pp. 491 - 505
• Main Authors: Lee, Woo-Cheol, Lee, Taeck-Kie, Hyun, Dong-Seok
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2001; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Converters; Current control; Delay effects; Direct current; Home appliances; Links; Modulation; Motor drives; Pulse duration modulation; Pulse width modulation; Pulse width modulation converters; Sampling methods; Sensors; Switches; Switching; Uninterruptible power systems; Voltage control
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/41.925576

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 3/spl phi/ 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.