Title :
A new position controller for induction machines: diametrical inversion of stator voltage
Author :
Guerreiro, M. ; Silva, Fernando
Author_Institution :
IPS, Escola Superior de Tecnologica, Setubal, Portugal
Abstract :
The diametrical inversion of stator voltage is used to control the rotor shaft position of an induction motor. The method substitutes the actual spatial voltage phasor applied to the motor, by another voltage phasor, which is diametrically opposed to the first and rotates in inverse direction. This substitution is made at high frequency (≃11 kHz). The resulting three phase voltage sequences applied to the machine are PWM generated by a sliding mode controlled voltage inverter, reading only the voltage applied to the motor. A first order sliding mode switching law (reading the shaft position and its speed) is used to decide which phasor is applied. The proposed method does not need the knowledge of the machine model or parameters. Some simulation results exhibit the system robustness to external torque disturbance. The electromagnetic torque response is fast (≃5 ms). Simulations and experimental results are shown and discussed
Keywords :
induction motors; invertors; machine control; position control; rotors; stators; torque; variable structure systems; PWM generated voltage sequences; diametrical inversion; electromagnetic torque response; external torque disturbance; first order sliding mode switching law; induction machines; induction motor; position controller; rotor shaft position control; shaft position; sliding mode controlled voltage inverter; stator voltage; three phase voltage sequences; voltage phasor; Frequency; Induction machines; Induction motors; Pulse width modulation inverters; Rotors; Shafts; Sliding mode control; Stators; Torque; Voltage control;
Conference_Titel :
Industrial Electronics, 1997. ISIE '97., Proceedings of the IEEE International Symposium on
Conference_Location :
Guimaraes
Print_ISBN :
0-7803-3936-3
DOI :
10.1109/ISIE.1997.649006