Title :
Stability improvement of vector control system of induction motor without speed sensor using synchronous current regulator
Author :
Ohyama, K. ; Shinohara, K.
Author_Institution :
Dept. of Electr. & Electron. Eng., Kagoshima Univ., Japan
Abstract :
This paper presents a stability analysis of a speed sensorless vector control (SSVC) system of an induction motor. The stability analysis takes into account the effects of three current control loops. The poles and zeros of the transfer functions for the rotor speed are calculated to investigate the influences of controller parameters and motor parameters. The theoretically derived step responses are compared with the experimental results. Also, the Bode diagrams of the transfer functions for the torque producing current are calculated. This paper discusses the suitability of different current regulator (CR) methods for the SSVC system of an induction motor
Keywords :
Bode diagrams; angular velocity control; electric current control; induction motors; machine vector control; poles and zeros; rotors; stability; step response; transfer functions; Bode diagrams; controller parameters; current control loops; current regulator methods; induction motor; motor parameters; poles; rotor speed; stability analysis; stability improvement; step responses; synchronous current regulator; torque producing current; transfer functions; vector control system; zeros; Current control; Induction motors; Machine vector control; Poles and zeros; Regulators; Rotors; Sensorless control; Stability analysis; Torque; Transfer functions;
Conference_Titel :
Electric Machines and Drives, 1999. International Conference IEMD '99
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5293-9
DOI :
10.1109/IEMDC.1999.769194
