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A Novel DC-Coil-Free Hybrid-Excited Machine with Consequent-Pole PM Rotor

Author

Listed:
  • Qingsong Wang

    (Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China)

  • Shuangxia Niu

    (Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China)

Abstract

This paper proposes a new DC coil free hybrid excited machine concept, which has no external field windings. The technical novelty is the integration of field windings and armature windings. DC bias current is injected into the excitation and the field windings in the traditional hybrid excited machine are eliminated. Compared with traditional hybrid-excited machines with additional field windings, the proposed machine can realize a higher slot utilization ratio, hence achieve a higher torque density and a wider flux adjusting range. Another advantage of the proposed machine is that the voltage drop associated with flux regulation is small due to the small DC resistance, and the torque generating capability at the flux regulating region can be improved accordingly. The rotor is specifically designed with magnet-iron sequences and a consequent-pole, in which the permanent magnet and iron pole are alternatively employed. A bi-directional flux modulating effect can be achieved, which can contribute to the magnetic coupling in the air-gap. Analytical derivation is used to describe the operating principle, and the proposed machine was optimally designed using the Tabu search algorithm. A prototype was made, and its performances investigated through experimental tests.

Suggested Citation

  • Qingsong Wang & Shuangxia Niu, 2018. "A Novel DC-Coil-Free Hybrid-Excited Machine with Consequent-Pole PM Rotor," Energies, MDPI, vol. 11(4), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:700-:d:137279
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    References listed on IDEAS

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    1. Joya C. Kappatou & Georgios D. Zalokostas & Dimitrios A. Spyratos, 2017. "3-D FEM Analysis, Prototyping and Tests of an Axial Flux Permanent-Magnet Wind Generator," Energies, MDPI, vol. 10(9), pages 1-14, August.
    2. Wang, Qingsong & Niu, Shuangxia, 2017. "Overview of flux-controllable machines: Electrically excited machines, hybrid excited machines and memory machines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P1), pages 475-491.
    3. Qingsong Wang & Shuangxia Niu, 2015. "Electromagnetic Design and Analysis of a Novel Fault-Tolerant Flux-Modulated Memory Machine," Energies, MDPI, vol. 8(8), pages 1-17, August.
    4. Guan-Ren Chen & Shih-Chin Yang & Yu-Liang Hsu & Kang Li, 2017. "Position and Speed Estimation of Permanent Magnet Machine Sensorless Drive at High Speed Using an Improved Phase-Locked Loop," Energies, MDPI, vol. 10(10), pages 1-17, October.
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    Cited by:

    1. Pingfan Xu & Xiaoyi Liu & Samson Shenglong Yu & Lisheng Pang, 2022. "ZVS Realization of H-Bridge Low-Voltage High-Current Converter via Phase-Shift and Saturable Control," Energies, MDPI, vol. 15(24), pages 1-11, December.
    2. Qingsong Wang & Yu Wu & Shuangxia Niu & Xing Zhao, 2022. "Advances in Thermal Management Technologies of Electrical Machines," Energies, MDPI, vol. 15(9), pages 1-17, April.

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