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Related Concept Videos

Sequence Networks of Rotating Machines01:24

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A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
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Current harmonics elimination control method for six-phase PM synchronous motor drives.

Lei Yuan1, Ming-liang Chen2, Jian-qing Shen2

  • 1Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China.

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|October 6, 2015
PubMed
Summary

This study introduces an improved vector control algorithm for six-phase permanent magnet synchronous motors (PMSM) to reduce unwanted harmonic currents. The novel method effectively suppresses 5th and 7th harmonics, enhancing motor performance.

Keywords:
Harmonics eliminationResonant controlSix-phase PMSMVector controlsix-phase SVPWM method

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Area of Science:

  • Electrical Engineering
  • Motor Control Systems
  • Power Electronics

Background:

  • Six-phase permanent magnet synchronous motors (PMSM) are prone to undesirable 5th and 7th stator harmonic currents.
  • Traditional vector control methods may not adequately address these specific harmonic issues.

Purpose of the Study:

  • To propose an improved vector control algorithm for six-phase PMSM to mitigate 5th and 7th stator harmonic currents.
  • To enhance the vector space decomposition (VSD) transformation for separate control of fundamental and harmonic subspaces.

Main Methods:

  • A novel synchronous rotating coordinate transformation matrix was developed.
  • A Proportional-Integral (PI) controller was used in the d-q subspace for non-static difference adjustment, with parameter design based on the internal model principle.
  • A PI controller in parallel with a resonant controller was implemented in the x-y subspace for harmonic compensation.
  • A new six-phase Space Vector Pulse Width Modulation (SVPWM) algorithm based on VSD transformation theory was proposed.

Main Results:

  • The proposed algorithm effectively decouples fundamental and harmonic subspaces.
  • Specific compensation for 5th and 7th harmonic current components was achieved.
  • Simulation and experimental results validated the effectiveness of the current decoupling vector controller.

Conclusions:

  • The improved vector control algorithm successfully reduces undesired 5th and 7th stator harmonic currents in six-phase PMSM.
  • The novel VSD transformation and control strategy enhance motor performance and efficiency.
  • The findings offer a practical solution for harmonic suppression in multi-phase motor drives.