Title :
A simplified MRAS based sensorless vector control method of induction motor
Author :
Tsuji, Mineo ; Umesaki, Yousuke ; Nakayama, Ryo ; Izumi, Katsuhiro
Author_Institution :
Dept. of Electr. & Electron. Eng., Nagasaki Univ., Japan
Abstract :
This paper presents a new sensorless vector control system that is based on the model reference adaptive system (MRAS) theory. The estimation of stator currents and rotor flux is constructed in a synchronously rotating reference frame, a simple slip frequency control is obtained and a linear model is easily derived. By a constant flux control and estimation of q-axis current only, a very simple sensorless scheme is proposed too. By computing the poles and zeros of the speed transfer function, the system stability is discussed. The effectiveness of the proposed system has been investigated by digital simulation and experimentation
Keywords :
control system analysis computing; control system synthesis; electric machine analysis computing; induction motors; machine testing; machine theory; machine vector control; model reference adaptive control systems; parameter estimation; stability; velocity control; computer simulation; constant flux control; control design; control performance; control simulation; induction motor; linear model; model reference adaptive system theory; poles and zeros; q-axis current estimation; rotor flux estimation; sensorless vector control method; simplified MRAS control scheme; slip frequency control; speed transfer function; stability; stator currents estimation; Adaptive control; Adaptive systems; Estimation theory; Frequency control; Frequency estimation; Poles and zeros; Programmable control; Sensorless control; Stators; Transfer functions;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.998124
