Premium
Lower speed range drive for sensorless vector controlled induction machines with stator voltage offset compensation method
Author(s) -
Kubota Hisao,
Matsuse Kouki,
Kataoka Yukio,
Ohta Hisayoshi
Publication year - 2000
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/1520-6416(200010)133:1<79::aid-eej8>3.0.co;2-7
Subject(s) - stator , offset (computer science) , control theory (sociology) , vector control , voltage , induction motor , compensation (psychology) , direct torque control , torque , computer science , rotor (electric) , engineering , physics , electrical engineering , control (management) , psychology , artificial intelligence , psychoanalysis , programming language , thermodynamics
The vector control method is widely used for induction machine drives. Recently, sensorless vector control for induction machines has been investigated and proposed. The speed range for the drives is limited to about 1:100 in industry. The main reason for this limitation is the inaccuracy of stator voltage measurement. The lower the rotor speed is, the lower the stator voltage. Therefore, it is difficult to detect the stator voltage accurately in the lower speed region, and difficult to control motor speed and motor torque precisely. This paper presents a method of improving the lower speed performance of sensorless vector controlled induction machine drives using offset compensation of stator voltage. The offset is compensated by using the fluctuation of the estimated rotor flux. The validity of the proposed method is verified by experimentation. © 2000 Scripta Technica, Electr Eng Jpn, 133(1): 79–86, 2000