A Novel Rotor Eddy Current Loss Estimation Method for Permanent Magnet Synchronous Machines with Small Inductance and a Conductive Rotor Sleeve

Le Pei, Liyi Li, Qingbo Guo, Rui Yang and Pengcheng Du
Additional contact information
Le Pei: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Liyi Li: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Qingbo Guo: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Rui Yang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Pengcheng Du: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China

Energies, 2019, vol. 12, issue 19, 1-20

Abstract: Typically, permanent magnet synchronous machines (PMSMs) with small inductance can achieve a higher power density and higher power factor. Thus, in many industrial applications, more and more PMSMs are being designed with small inductance. Compared with traditional PMSMs, current harmonics in small inductance PMSMs are much more abundant, and the amplitudes are usually high. These current harmonics will cause large eddy current losses (ECLs) on the rotor, making the estimation of ECLs necessary in the design stage. Currently, ECL estimation methods are usually based on frequency order information, which cannot tell the travelling direction of the harmonic magneto-wave, resulting in the inaccuracy of the estimation. This article proposes a novel estimation method based on the mechanism of the formation of space-vector pulse width modulation (PWM), which considers both the frequency order and travelling direction of the harmonic wave, resulting in the improvement of the accuracy. Besides this, by using double Fourier analysis (DFA) instead of traditional fast Fourier analysis (FFA), the predicted frequencies of the current harmonics are more accurate and free of the troubles caused by traditional FFA-based methods. Simulation study and experiments are conducted to show the effectiveness of the proposed method.

Keywords: double Fourier analysis; current spectrum decomposition; eddy current loss; permanent magnet machine design (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: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/19/3760/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/19/3760/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:19:p:3760-:d:272521

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().