access icon free Rotor design to improve dynamic performance of axial flux hysteresis motors

In high-speed axial flux hysteresis motors (AFHMs), the hysteresis ring and the hysteresis ring holder have the main roles of producing hysteresis torque in steady state and eddy current torque at sub-synchronous speed, respectively. In conventional AFHM, and especially in the high-speed AFHM types, the hysteresis ring holder is placed between the hysteresis ring and stator to produce more eddy current torque at the time of starting. Since the minimum magnetic air gap can cause better motor performance, the previous research exchanges the hysteresis ring place and its holder. However, it has worst motor dynamic response as a result. To cope with these issues, a new model is proposed in this study. A thin copper piece is attached at the bottom of the hysteresis ring to improve the eddy current torque and consequently motor dynamic response. Then finite element analysis is done in order to acquire the accurate copper thickness and investigate the new proposed AFHM. Furthermore, experimental setups are provided and AFHM results in all cases are measured. The obtained test and simulation results show that the new proposed model make a better dynamic performance for the AFHM.

Inspec keywords: hysteresis motors; finite element analysis; eddy currents; rotors

Other keywords: rotor design; thin copper piece; eddy current torque; hysteresis ring holder; hysteresis ring; hysteresis torque; minimum magnetic air gap; finite element analysis; high-speed axial flux hysteresis motors

Subjects: Synchronous machines; Electromagnetic induction; Finite element analysis

References

    1. 1)
    2. 2)
    3. 3)
    4. 4)
      • 3. Modarres, M., Vahedi, A., Ghazanchaei, M.R.: ‘Investigation on dynamic and steady state performance of axial flux hysteresis motors considering rotor configuration’, Int. Rev. Electr. Eng., 2010, 5, (1), pp. 155159.
    5. 5)
      • 4. Modarres, M., Vahedi, A., Ghazanchaei, M.R.: ‘Study on axial flux hysteresis motors considering airgap variation’, J. Electromagn. Anal. Appl., 2010, 4, (2), pp. 252257.
    6. 6)
      • 6. Darabi, A., Lesani, H., Ghanbari, T., Akhavanhejazi, A.: ‘Modeling and optimum design of disk-type hysteresis motors’. Proc. Int. Conf. Electrical Machines and Systems, Seoul, Korea, October 2007, pp. 9981002.
    7. 7)
    8. 8)
      • 7. Cathy, J.J.: ‘Electric machines’ (McGraw-Hill publisher, New York, 2001).
    9. 9)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-epa.2014.0046
Loading

Related content

content/journals/10.1049/iet-epa.2014.0046
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading