Design and implementation of a closed-loop observer and adaptive controller for induction motor drives

被引:26
作者
Elbuluk, M [1 ]
Langovsky, N
Kankam, MD
机构
[1] Univ Akron, Dept Elect Engn, Akron, OH 44325 USA
[2] Howard Univ, Dept Elect Engn, Washington, DC 20059 USA
基金
美国国家航空航天局;
关键词
adaptive controller; closed-loop observer; induction motor drives;
D O I
10.1109/28.673712
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper discusses the implementation and experimental results of a closed-loop rotor flux observer and model reference adaptive system (MRAS) of a direct field-oriented control (FOC) of an induction motor drive. The motor was supplied from a high-frequency (20 kHz) ac resonant link via an MOS-controlled-thyristor (MCT)-based bidirectional converter. Hardware and software implementations of the various motor control functions are presented. The closed-loop observer combines the current and voltage models via a speed-dependent gain (SDG), The current model was formulated to operate in the rotor reference frame and requires only an encoder angle and not the actual rotor speed for implementation, The closed-loop observer permits the use of a pure analog integrator to calculate an adequate stator flux. The use of an ac resonant link further complicated an all-digital calculation of the stator flux. The observer and adaptive controller were tested on a 400-Hz 2-hp induction motor for low and high speeds. The closed-loop observer showed sensitivity at low speeds to the rotor circuit time constant which attributed to the current model rotor flux estimation, At high speed, the closed-loop observer followed the voltage model rotor flux estimation attributes. The MRAS was able to improve the complete speed response by correcting the current model rotor flux observer for errors in estimation of its parameters.
引用
收藏
页码:435 / 443
页数:9
相关论文
共 20 条
[1]  
BOTTURA C, 1991, P APEC 91, P203
[2]  
Dubey G. K., 1989, POWER SEMICONDUCTOR
[3]  
FRANCESCHINI G, 1990, P IPEC TOK, P1227
[5]  
HORI Y, P 1989 IEEE IAS ANN, P523
[6]  
Hori Y., 1990, P IPEC 90 TOK JAP, P1219
[7]  
HUNG KT, P 1990 IEEE IAS ANN, P589
[8]  
JANSEN P, P 1993 IEEE IAS ANN, P536
[9]  
JANSEN P, P 1992 IEEE IAS ANN, P570
[10]  
Kubota H, 1990, P INT POW EL C IPEC, P1213