Control for Optimized Air-Gap Magnetic Field of Five-Phase Induction Motor through Dual-Plane Asynchronous Rotation Transformation

Abstract:

This paper presents a control scheme with an optimized air-gap magnetic field for five-phase induction motor, the control objective is to generate a quasi-square magnetic flux density by the control of excitation and torque currents in the two planes. In this paper, the decoupling vector control model of five-phase induction motor in d₁-q₁-d₃-q₃ coordinate system is analyzed, and the direct and quadrature current components in the third harmonic plane as non-linear functions of the fundamental are built, which guarantee the air-gap magnetic to be a constant quasi-square waveform irrespective of the mechanical load, and then the third harmonic current injected method for improved air-gap magnetic field is proposed. Finally, the simulations by Matlab/Simulink and experiments are implanted on a 5.5 kW, five-phase concentrated full-pitch windings induction motor. The results indicate that the proposed method can satisfy the requirement of a quasi-square air-gap flux density, and the air-gap magnetic field gets improved.

• Periodical: Applied Mechanics and Materials (Volumes 347-350)
• Pages: 486-490
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.347-350.486
• Online since: August 2013
• Authors: Mu Yi Yin, Ling Zhang, Peng Zhu, Fei Guan
• Keywords: Air-Gap Flux Density, Asynchronous Transformation, Harmonic Current Injected, Quasi-Square Waveform

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