Title :
Adjusted current controller for signal-injection based control algorithms
Author :
Jung, Suk-Hwa ; Doki, Shinji ; Okuma, Shigeru ; Fujitsuna, Masami
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Nagoya, Japan
Abstract :
This Paper proposes current controller for signal-injection based control schemes such as parameter identification and position-sensorless control. In conventional current control system with voltage signal-injection, the injected frequency current separation is carried out by BSFs. However the separation is not properly conducted especially during transient state and when the current controller bandwidth is close to injection signal frequency. This distorts transient response and affects stability of current control system. The proposed method estimates the injected frequency current components based on motor model using the injection signal as an input. Therefore the precise signal separation is accomplished even in transient state. Moreover, current controller´s stability and dynamic performance are improved significantly. Experimental results are presented to verify the proposed method. Moreover, implementation issues such as time delay and parameters variation is discussed.
Keywords :
electric current control; sensorless machine control; transient response; adjusted current controller; frequency current separation; motor model; parameter identification; position-sensorless control; signal separation; signal-injection based control algorithms; transient response and; transient state; voltage signal-injection; current control; parameter identification; position-sensorless control; signal injection; signal separation;
Conference_Titel :
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-61284-969-0
DOI :
10.1109/IECON.2011.6119476