Hybrid-Excited PM Motor for Electric Vehicle

Luca Cinti and Nicola Bianchi
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Luca Cinti: Department of Industrial Engineering, University of Padova, 35122 Padova, Italy
Nicola Bianchi: Department of Industrial Engineering, University of Padova, 35122 Padova, Italy

Energies, 2021, vol. 14, issue 4, 1-12

Abstract: This paper deals with the potentials of a Hybrid-Excitation Permanent-Magnet (HEPM) machine. The HEPM machine is characterized by a rotor including both permanent magnets (PMs) and excitation coils. The PMs produce a constant flux at the air gap of the machine, while an excitation current is supplied so as to regulate such a flux. A flux increase could be necessary during transient overload operations, while a flux decrease is useful during Flux-Weakening (FW) actions to operate at speeds higher than the nominal speed. Torque, power, efficiency, flux density and losses of an interior permanent magnet (IPM) motor and an HEPM motor are analyzed in detail. It is shown that this excitation winding produces a great advantage in terms of torque and power performance during the operations at speeds higher than the nominal speed. Despite the additional rotor losses, it is shown that there is a higher efficiency.

Keywords: permanent magnet machines; permanent magnet machine control; interior permanent magnet motor; hybrid excitation; per-unit system; flux-weakening operation; magnetic analysis; finite-element analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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