Design and Performance Comparisons of Brushless Doubly-Fed Generators with Different Rotor Structures

Zhang, Fengge, Yu, Siyang, Wang, Yutao, Jin, Shi and Jovanovic, Milutin (2019) Design and Performance Comparisons of Brushless Doubly-Fed Generators with Different Rotor Structures. IEEE Transactions on Industrial Electronics, 66 (1). pp. 631-640. ISSN 0278-0046

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The Brushless Doubly-Fed Generator (BDFG) shows the great potential for use in large variable speed wind turbines due to its high reliability and cost benefits of a partially-rated power electronics converter. However, it suffers from the compromised efficiency and power factor in comparison with conventional doubly fed induction or synchronous generators. Therefore, optimizing the BDFG, especially the rotor, is necessary for enhancing its torque density and market competitiveness. In this paper, a novel cage-assisted magnetic barrier rotor, called the hybrid rotor, is proposed and analyzed. The detailed analytical design approaches based on the magnetic field modulation theory are investigated. In addition, the machine losses and mutual inductance values using the proposed rotor designs are calculated and their performance implications evaluated. Finally, the comparative experimental results for two BDFG prototypes are presented to verify the accuracy and effectiveness of the theoretical studies.

Item Type: Article
Subjects: H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 29 May 2018 08:16
Last Modified: 11 Dec 2018 11:16

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