Title :
Advanced PWM algorithm development for online induction motor impulse-response identification method
Author :
Benn, Lance C. ; Burton, Bruce ; Harley, Ron G.
Author_Institution :
Natal Univ., Durban, South Africa
Abstract :
This paper investigates how the pulse width modulation (PWM) algorithm can be adapted in order to implement online system identification using pseudorandom binary sequences (PRBS) for condition monitoring and control, with particular reference to induction motors. Two techniques for PRBS implementation using a VSI are identified and discussed. Detailed simulation results are compared with practical PRBS responses in order to show the advantages and disadvantages of each implementation technique. Model parameters of a 3 kW induction motor with a locked rotor and at rated speed are estimated and compared with nominal values.
Keywords :
DC-AC power convertors; PWM invertors; control system analysis; control system synthesis; induction motors; machine control; machine theory; parameter estimation; rotors; 3 kW; PWM algorithm; VSI; condition monitoring; induction motor control; locked rotor; online induction motor impulse-response identification method; pseudorandom binary sequences; rated speed; Binary sequences; Condition monitoring; Equations; Frequency response; Induction motors; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; System identification; Time measurement;
Conference_Titel :
Africon Conference in Africa, 2002. IEEE AFRICON. 6th
Print_ISBN :
0-7803-7570-X
DOI :
10.1109/AFRCON.2002.1160009
