Excitation Winding Short-Circuits in Hybrid Excitation Permanent Magnet Motor

2014 ◽  
Vol 29 (3) ◽  
pp. 567-575 ◽  
Author(s):  
G. J. Li ◽  
S. Hloui ◽  
J. Ojeda ◽  
E. Hoang ◽  
M. Lecrivain ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motor ◽  
Hybrid Excitation ◽  
Short Circuits ◽  
Excitation Winding

scholarly journals Hybrid-Excited PM Motor for Electric Vehicle

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 916
Author(s):  
Luca Cinti ◽  
Nicola Bianchi
Keyword(s):  
Permanent Magnet ◽  
Power Efficiency ◽  
Permanent Magnets ◽  
Power Performance ◽  
Excitation Current ◽  
Hybrid Excitation ◽  
Interior Permanent Magnet ◽  
Flux Increase ◽  
Rotor Losses ◽  
Excitation Winding

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.

scholarly journals Electro-Magnetic and Structural Analysis of Six-Pole Hybrid-Excited Permanent Magnet Motors

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2051
Author(s):  
Luca Cinti ◽  
Mattia Carlucci ◽  
Nicola Bianchi ◽  
Manuele Bertoluzzo
Keyword(s):  
Permanent Magnet ◽  
Current Control ◽  
Permanent Magnet Motors ◽  
Hybrid Excitation ◽  
Rotor Flux ◽  
Numerical Formulation ◽  
Electro Magnetic ◽  
Electro Motive Force ◽  
Magnetic Network ◽  
Excitation Winding

Potentials and limits of the Hybrid-Excitation Permanent-Magnet (HEPM) synchronous machine are dealt with in this paper. A six-pole machine is taken into consideration, and both parallel and series configurations are analysed and compared. Taking advantage of the rotor excitation coils, the permanent magnet (PM) rotor flux can be adjusted according to the operating speed to improve its performance parameters. The electro-magnetic force is analysed in its first harmonic and in the complete shape. Moreover, a comparison between analytical and numerical formulation has been done for the rotor current control. In particular, the speed range is extended, and electro-mechanical torque and power are increased, as well as the efficiency. It will be shown that the rotor flux reduction by using the excitation winding yields an improvement of the motor performance. The main advantage will be obtained during the flux-weakening operations. In this paper, different rotor topologies will be analysed to highlight the advantages and drawbacks of each of them, and how it is possible to achieve higher speed with higher torque and without high saliency ratio. A magnetic network will be introduced to explain the different contribution of the excitation winding to the rotor flux. Furthermore, a comparison of the amount of the volume of PM, copper and iron in internal permanent magnet (IPM) motor and HEPM motor will be analysed. Actually, an analysis of the harmonic content in the electro-motive force even varying the excitation current and a mechanical stress analysis of each machine will be shown. Finally, it will be verified that the excitation losses represent a minimum component of the total losses.

The Analytical Model of a Slotless Switched Permanent Magnet Motor

2018 ◽  
pp. 48-56
Author(s):  
Aleksandr A. AFANAS’YEV ◽  
◽  
Dmitrii A. TOKMAKOV ◽  
Kong Tam NGUYEN ◽  
◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Analytical Model ◽  
Permanent Magnet Motor
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