Title :
Detection of three-phase currents in space-vector PWM inverters with only one DC link current sensor
Author :
Joo, Hyeong-Gil ; Kim, Chang-Gyun ; Shin, Hwi-Beom ; Youn, Myung- Joong
Author_Institution :
R&D Centre, Leechun Electr. Manuf. Co. Ltd., inchon, South Korea
Abstract :
A method for detecting the three-phase currents of a voltage-fed pulsewidth modulated (PWM) inverter is proposed by utilizing only one current sensor placed on the DC-link. The estimation scheme is employed to reduce the detection errors and a recursive least square method (RLSM) is applied to identify the system parameters for compensating the parameter mismatching problem. The proposed method is simple and reduces the cost. It also has the small detection errors and provides the information on system parameters
Keywords :
DC-AC power convertors; PWM invertors; electric current measurement; electric sensing devices; least squares approximations; measurement theory; switching circuits; DC link current sensor; detection error; parameter mismatching problem; recursive least square method; space-vector PWM inverters; three-phase current detection; AC motors; Costs; Current control; Gas detectors; Parameter estimation; Phase detection; Pulse width modulation inverters; Research and development; Space vector pulse width modulation; Voltage;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2775-6
DOI :
10.1109/IECON.1996.570917
