Open AccessResearch on five‐phase induction motor system control with third harmonic current injection
Author(s) -
Zhu Peng,
Qiao Mingzhong,
Wei Yongqing,
Xia Yihui
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0789
Subject(s) - induction motor , rotating magnetic field , control theory (sociology) , harmonic , electromagnetic coil , three phase , vector control , physics , harmonics , rotor (electric) , magnetic field , engineering , electrical engineering , acoustics , computer science , voltage , control (management) , quantum mechanics , artificial intelligence
To enhance the power density of five‐phase induction motor system, the structure with concentrated full‐pitch windings is adopted, and then the five‐phase motor system is drove by a non‐sinusoidal power supply with third‐harmonic injection. By dual‐plane rotation transformation, the mathematic models in two orthogonal space planes, d 1– q 1 and d 3– q 3, were deduced. The magnetic fluxes in the fundamental and third‐harmonic space were oriented on the d 1 and d 3 axes, and the corresponding equations of rotor field‐oriented control were obtained. To satisfy the requirement of a quasi‐square air‐gap flux, the direct and quadrature current components in the third‐harmonic plane as non‐linear functions of the fundamental components are calculated. On the basis above, the field‐oriented vector control method for a five‐phase induction motor with the third‐harmonic current injection was proposed. Finally, simulation by MATLAB/Simulink and experiment is implanted on the five‐phase induction motor. The results indicate that the air‐gap magnetic field gets improved, and the power density of five‐phase induction motor is enhanced without any increase of power switch capacity and machine size.