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Energies 2018, 11(3), 554; https://doi.org/10.3390/en11030554

Optimal Design and Experimental Verification of Wound Rotor Synchronous Machine Using Subharmonic Excitation for Brushless Operation

1
Department of Electronic Systems Engineering, Hanyang University, Ansan 15588, Korea
2
Department of Electrical Engineering, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
*
Author to whom correspondence should be addressed.
Received: 16 January 2018 / Revised: 27 February 2018 / Accepted: 28 February 2018 / Published: 5 March 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

This paper presents an optimal design of a recently introduced brushless wound-rotor synchronous machine (BL-WRSM). The BL-WRSM, with a special stator winding arrangement, utilizes a single three-phase inverter for generating an additional spatial subharmonic component in the stator magnetomotive force (MMF). This subharmonic component of the stator MMF is used for the brushless excitation of the rotor. The pole span and pole shoe height were the optimized parameters, with the goals of improving the quality of output power and reducing torque ripple. Moreover, the average torque of the machine was improved by optimizing the harmonic winding placed on the rotor. The optimized BL-WRSM was further analyzed for the flux weakening operation. Finite element analysis (FEA) was carried out to analyze the performance of the BL-WRSM. Finally, the performance of the optimal BL-WRSM model was verified through an experimental test, which demonstrated good agreement with the simulation results. View Full-Text
Keywords: optimal design; brushless wound rotor synchronous machine (BL-WRSM); harmonic winding; finite element analysis (FEA) optimal design; brushless wound rotor synchronous machine (BL-WRSM); harmonic winding; finite element analysis (FEA)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Hussain, A.; Atiq, S.; Kwon, B.-I. Optimal Design and Experimental Verification of Wound Rotor Synchronous Machine Using Subharmonic Excitation for Brushless Operation. Energies 2018, 11, 554.

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