The effect of PWM on rotor eddy-current losses in high-speed permanent magnet machines

Author

Jumayev, S. ; Merdzan, M. ; Boynov, K.O. ; Paulides, J.J. ; Pyrhonen, J. ; Lomonova, E.

Author_Institution

Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

In last decades, interest on high-speed permanent magnet (PM) machines has grown significantly due to their high efficiency, high power factor and high power density. However, a weak point of these machines is a risk of magnet demagnetization since rare-earth permanent magnets are sensitive to temperature [1]. The main reason of temperature increase in the rotor are eddy current losses, which are induced by time harmonics in stator currents and spatial harmonics due to windings distribution. Additionally, rotor eddy current losses can considerably decrease the machine efficiency.

Keywords

demagnetisation; eddy current losses; permanent magnet machines; power factor; pulse width modulation; rotors; stators; PWM effect; demagnetization; high-speed permanent magnet machines; power density; power factor; pulse width modulation; rare-earth permanent magnets; rotor eddy-current losses; spatial harmonics; stator currents; winding distribution; Analytical models; Eddy currents; Finite element analysis; Harmonic analysis; Permanent magnets; Pulse width modulation; Rotors;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7157112

Filename

7157112