Smooth starting of slip ring induction motors

Author

Abdel-Halim, M.A. ; Badr, M.A. ; Alolah, A.I.

Author_Institution

Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia

Volume

12

Issue

4

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

317

Lastpage

322

Abstract

The starting of three-phase wound rotor induction motors by stepped resistances added in the rotor circuit suffers from several problems. This paper suggests a novel method of motor starting by inserting a parallel combination of resistance, inductance and capacitance in the rotor circuit. The proposed method guarantees a smooth and high starting torque over most of the starting period besides a controlled starting current. A mathematical model is developed based on a frequency domain quasi-steady state equivalent circuit. An optimization technique is then applied to determine the values of the rotor added elements such that minimum starting time is achieved subject to current and torque constraints. Experimental verification has been carried out and the computed results are in good agreement with the measured values

Keywords

control system analysis; control system synthesis; electric impedance; equivalent circuits; frequency-domain analysis; induction motors; machine control; machine testing; machine theory; optimal control; optimisation; rotors; starting; frequency domain quasi-steady state equivalent circuit; mathematical model; motor starting; optimization technique; performance testing; rotor circuit; slip ring induction motors; starting torque; three-phase wound rotor induction motors; Capacitance; Constraint optimization; Equivalent circuits; Frequency domain analysis; Inductance; Induction motors; Mathematical model; Rotors; Torque control; Wounds;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.638867

Filename

638867