Analysis of the dynamic model nine-phase induction motor becomes difficult because based on a 9×9 matrix and a circuit of magnetically coupled transformer. In order to gain the qdn dynamic model of the nine-phase induction motors in easy, simple, quick and consistent way, the motor analysis will based on 3×9 transformation matrix and the equivalent circuit T model. The 3×9 transformation matrix qdn is substituted into the equation in form abc so that the matrix equation of qdn is obtained. Then qdn equation results a similar qd equivalent circuit, which has different methods n that is, based the circuit of magnetically coupled transformer. Simulation results show that the dynamic characteristics of 9-phase induction motor based on the T model and magnetically coupled circuit have similar torque and speed dynamic response.

Original languageEnglish
Pages (from-to)265-276
Number of pages12
JournalTelkomnika (Telecommunication Computing Electronics and Control)
Issue number2
Publication statusPublished - Jun 2013


  • 3×9 matrik qdn
  • T model of motor equivalent circuit
  • qdn dynamic model


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