<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Starting of a three-phase Induction motor using a starter rheostat in rotor circuit has some disadvantages. A new method for starting of a three-phase motor by using a parallel combination of resistors, self-inductors and capacitors in rotor circuit is proposed in this paper. The proposed method ensures the soft and higher starting torque as well as limited starting current as compared to shorted rotor method. The characteristic curves for both methods (shorted rotor and rotor with added elements) are provided. The mathematical model based on the steady-state equivalent circuit of the induction motor is expanded in frequency domain and the required computer program is prepared using an optimization method. The values for added elements to rotor circuit are calculated in such a way that minimum starting time considering current and torque limitations are achieved.</p></abstract>

Starting of a three-phase Induction motor using a starter rheostat in rotor circuit has some disadvantages. A new method for starting of a three-phase motor by using a parallel combination of resistors, self-inductors and capacitors in rotor circuit is proposed in this paper. The proposed method ensures the soft and higher starting torque as well as limited starting current as compared to shorted rotor method. The characteristic curves for both methods (shorted rotor and rotor with added elements) are provided. The mathematical model based on the steady-state equivalent circuit of the induction motor is expanded in frequency domain and the required computer program is prepared using an optimization method. The values for added elements to rotor circuit are calculated in such a way that minimum starting time considering current and torque limitations are achieved.

A New Soft Starting Method for Wound-Rotor Induction Motor

Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran

Journal of Electrical Engineering

{"article-title":"A New Soft Starting Method for Wound-Rotor Induction Motor"}

Starting of a three-phase Induction motor using a starter rheostat in rotor circuit has some disadvantages. A new method for starting of a three-phase motor by...

A New Soft Starting Method for Wound-Rotor Induction Motor

Published Online: Jun 07, 2011

Page range: 31 - 36

DOI: https://doi.org/10.2478/v10187-011-0005-3

Keywords
induction motors, starting methods, rotor impedance, starting torque

This content is open access.

A New Soft Starting Method for Wound-Rotor Induction Motor

Published Online: Jun 07, 2011

Page range: 31 - 36

DOI: https://doi.org/10.2478/v10187-011-0005-3

Keywordsinduction motors, starting methods, rotor impedance, starting torque

This content is open access.

Keywords
induction motors, starting methods, rotor impedance, starting torque