Analytical model including rotor eccentricity for bearingless synchronous reluctance motors

Seppo E. Saarakkala; Victor Mukherjee; Maksim Sokolov; Marko Hinkkanen; Anouar Belahcen

doi:10.1109/ICELMACH.2018.8506892

Analytical model including rotor eccentricity for bearingless synchronous reluctance motors

Seppo E. Saarakkala, Victor Mukherjee, Maksim Sokolov, Marko Hinkkanen, Anouar Belahcen

Tallinn University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

3 Citations (Scopus)

198 Downloads (Pure)

Abstract

This paper deals with modelling of rotor eccentricity in a dual three-phase winding bearingless synchronous reluctance motors (BSyRMs). The motor includes two separate sets of three-phase windings: one for torque production and the other one for radial force production. For this motor, an improved analytical model with linear magnetic material is presented. The accuracy of the model depends on the accuracy of the inverse-airgap function. Typically, a series expansion is used for approximating the inverse-airgap function. In order to make the main-winding inductances depend on the radial position, at least the first two terms have to be included in the expansion, enabling calculation of the radial forces caused by unbalanced magnetic pull. The improved model is applicable, e.g., for stability analysis, time-domain simulations, or developing real-time control methods.

Original language	English
Title of host publication	Proceedings of the 23rd International Conference on Electrical Machines, ICEM 2018
Publisher	IEEE
Pages	1388-1394
Number of pages	7
ISBN (Electronic)	978-1-5386-2477-7
DOIs	https://doi.org/10.1109/ICELMACH.2018.8506892
Publication status	Published - 3 Sept 2018
MoE publication type	A4 Conference publication
Event	International Conference on Electrical Machines - Ramada Plaza Thraki, Alexandroupoli, Greece Duration: 3 Sept 2018 → 6 Sept 2018 Conference number: 23 https://www.icem.cc/2018/

Conference

Conference	International Conference on Electrical Machines
Abbreviated title	ICEM
Country/Territory	Greece
City	Alexandroupoli
Period	03/09/2018 → 06/09/2018
Internet address	https://www.icem.cc/2018/

Keywords

dual-winding motor
eccentricity
inductance
inverse-airgap function
open-loop stability
radial force
unbalanced magnetic pull

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10.1109/ICELMACH.2018.8506892

c82_postAccepted author manuscript, 1.03 MB

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@inproceedings{53d08334033e4f91b4cb1a96c80976cb,

title = "Analytical model including rotor eccentricity for bearingless synchronous reluctance motors",

abstract = "This paper deals with modelling of rotor eccentricity in a dual three-phase winding bearingless synchronous reluctance motors (BSyRMs). The motor includes two separate sets of three-phase windings: one for torque production and the other one for radial force production. For this motor, an improved analytical model with linear magnetic material is presented. The accuracy of the model depends on the accuracy of the inverse-airgap function. Typically, a series expansion is used for approximating the inverse-airgap function. In order to make the main-winding inductances depend on the radial position, at least the first two terms have to be included in the expansion, enabling calculation of the radial forces caused by unbalanced magnetic pull. The improved model is applicable, e.g., for stability analysis, time-domain simulations, or developing real-time control methods.",

keywords = "dual-winding motor, eccentricity, inductance, inverse-airgap function, open-loop stability, radial force, unbalanced magnetic pull",

author = "Saarakkala, {Seppo E.} and Victor Mukherjee and Maksim Sokolov and Marko Hinkkanen and Anouar Belahcen",

year = "2018",

month = sep,

day = "3",

doi = "10.1109/ICELMACH.2018.8506892",

language = "English",

pages = "1388--1394",

booktitle = "Proceedings of the 23rd International Conference on Electrical Machines, ICEM 2018",

publisher = "IEEE",

address = "United States",

note = "International Conference on Electrical Machines, ICEM ; Conference date: 03-09-2018 Through 06-09-2018",

url = "https://www.icem.cc/2018/",

}

Saarakkala, SE, Mukherjee, V, Sokolov, M, Hinkkanen, M & Belahcen, A 2018, Analytical model including rotor eccentricity for bearingless synchronous reluctance motors. in Proceedings of the 23rd International Conference on Electrical Machines, ICEM 2018. IEEE, pp. 1388-1394, International Conference on Electrical Machines, Alexandroupoli, Greece, 03/09/2018. https://doi.org/10.1109/ICELMACH.2018.8506892

Analytical model including rotor eccentricity for bearingless synchronous reluctance motors. / Saarakkala, Seppo E.; Mukherjee, Victor; Sokolov, Maksim et al.
Proceedings of the 23rd International Conference on Electrical Machines, ICEM 2018. IEEE, 2018. p. 1388-1394.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Analytical model including rotor eccentricity for bearingless synchronous reluctance motors

AU - Saarakkala, Seppo E.

AU - Mukherjee, Victor

AU - Sokolov, Maksim

AU - Hinkkanen, Marko

AU - Belahcen, Anouar

N1 - Conference code: 23

PY - 2018/9/3

Y1 - 2018/9/3

N2 - This paper deals with modelling of rotor eccentricity in a dual three-phase winding bearingless synchronous reluctance motors (BSyRMs). The motor includes two separate sets of three-phase windings: one for torque production and the other one for radial force production. For this motor, an improved analytical model with linear magnetic material is presented. The accuracy of the model depends on the accuracy of the inverse-airgap function. Typically, a series expansion is used for approximating the inverse-airgap function. In order to make the main-winding inductances depend on the radial position, at least the first two terms have to be included in the expansion, enabling calculation of the radial forces caused by unbalanced magnetic pull. The improved model is applicable, e.g., for stability analysis, time-domain simulations, or developing real-time control methods.

AB - This paper deals with modelling of rotor eccentricity in a dual three-phase winding bearingless synchronous reluctance motors (BSyRMs). The motor includes two separate sets of three-phase windings: one for torque production and the other one for radial force production. For this motor, an improved analytical model with linear magnetic material is presented. The accuracy of the model depends on the accuracy of the inverse-airgap function. Typically, a series expansion is used for approximating the inverse-airgap function. In order to make the main-winding inductances depend on the radial position, at least the first two terms have to be included in the expansion, enabling calculation of the radial forces caused by unbalanced magnetic pull. The improved model is applicable, e.g., for stability analysis, time-domain simulations, or developing real-time control methods.

KW - dual-winding motor

KW - eccentricity

KW - inductance

KW - inverse-airgap function

KW - open-loop stability

KW - radial force

KW - unbalanced magnetic pull

U2 - 10.1109/ICELMACH.2018.8506892

DO - 10.1109/ICELMACH.2018.8506892

M3 - Conference article in proceedings

SP - 1388

EP - 1394

BT - Proceedings of the 23rd International Conference on Electrical Machines, ICEM 2018

PB - IEEE

T2 - International Conference on Electrical Machines

Y2 - 3 September 2018 through 6 September 2018

ER -

Analytical model including rotor eccentricity for bearingless synchronous reluctance motors

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