Dual Three-Phase Salient-Pole Synchronous Motor

Dual Three-Phase Salient-Pole Synchronous Motor

1. USED IN

   • high-power electric drives
     • power rating
     • performance
     • reliability enhancement
     • PWM-fed 22-MW salient-pole synchronous motor with dual three-phase stator arrangement, under voltage-source supply, conceived for electric ship propulsion

2. SUPPLIED BY

   • voltage-source PWM inverters

3. Possible drawbacks

   • high-frequency circulation currents
     • motor phases
       • PWM switching
   • low-frequency current harmonics
     • synchronous machines
       • internally generated
         • rotor saliency
         • nonuniform air-gap

4. behavior studied through

   • Time-stepping Finite-Element Analysis
     • high internally-generated circulating currents
     • 5th harmonic component
     • assessed
       • real synchronous machine
       • laboratory prototype multiphase synchronous machines

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