DocumentCode :
2600932
Title :
A new sensorless thrust control of linear induction motor
Author :
Ryu, Hyung-Min ; Ha, Jung-Ik ; Sul, Seung-Ki
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Volume :
3
fYear :
2000
fDate :
2000
Firstpage :
1655
Abstract :
This paper presents the field-oriented thrust control of a linear induction motor without flux or speed sensor. The induction motor is structurally symmetrical but it has the difference of the reluctances between the flux axis and the quadrature axis due to the main flux saturation. This electrical saliency can be utilized to estimate an instantaneous flux angle by high frequency signal injection. In the case of a rotary induction motor, it has been verified that this high frequency signal injection method gives reasonable torque controllability at zero or low stator frequency even under a heavily loaded condition. In this paper, it is shown that the electrical saliency also exists in the linear induction motor and the comparison with the rotary induction motor is described. From this result, the sensorless field-oriented thrust control of a linear induction motor in low operating frequency region is presented and the sensorless control in the overall frequency range is implemented by the combination with an adaptive observer
Keywords :
controllability; linear induction motors; machine vector control; magnetic flux; mechanical variables control; observers; stators; torque control; adaptive observer; electrical saliency; field-oriented thrust control; flux axis; heavily loaded condition; high frequency signal injection method; instantaneous flux angle; linear induction motor; low operating frequency region; low stator frequency; main flux saturation; quadrature axis; rotary induction motor; sensorless field-oriented thrust control; sensorless thrust control; structurally symmetrical motor; torque controllability; zero stator frequency; Adaptive control; Controllability; Frequency estimation; Impedance; Induction motors; Mechanical sensors; Programmable control; Sensor phenomena and characterization; Sensorless control; Stators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
ISSN :
0197-2618
Print_ISBN :
0-7803-6401-5
Type :
conf
DOI :
10.1109/IAS.2000.882103
Filename :
882103
Link To Document :
بازگشت