Computation of equivalent circuit parameters of nine-phase induction motor in different operating modes

Document Type


Presentation Date


Conference Name

4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012

Conference Location

Raleigh, North Carolina

Source of Publication

2012 IEEE Energy Conversion Congress and Exposition



Inclusive pages



The nine-phase squirrel-cage induction motor designed for 4-pole operation can also be utilized to operate in 3 phase, 12 pole configuration by rearranging the stator winding connections using the pole phase modulation technique. The 9 phase 4 pole configuration can be used for extended high speed and low torque requirement, whereas the 3 phase, 12 pole arrangement can be utilized for low speed and high torque applications. By switching from one stator winding configuration to another, the nine-phase induction machine can be used for high torque, low speed and extended high speed range and low torque requirements in such applications as the electric vehicle and high speed elevators. In this paper, two comprehensive methods are presented to determine the parameters of the 36 stator slots machine in the two configurations. The parameters calculated using the magnetic circuit analysis and the field analysis using Finite Elements methods are validated by experimental results.


finite elements methods, equivalent circuit parameters, different operating modes, nine-phase squirrel-cage induction motor, 4-pole operation, stator winding connections, pole phase modulation technique, 9 phase 4 pole configuration, high speed requirement, low torque requirement, high torque applications, stator winding configuration, low torque requirements, electric vehicle, high speed elevators, stator slots machine, magnetic circuit analysis, torque, equivalent circuits, finite element analysis, induction motors, magnetic circuits, phase modulation, stators, Rotors, Stator windings, Inductance, Resistance, Mathematical model, Windings


Electrical and Computer Engineering

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