A finite element post-processing for skew effects in brushless doubly-fed induction machines

Xuezhou Wang; Tim Strous; Domenico Lahaye; Henk Polinder; Bram Ferreira

doi:10.1109/ICELMACH.2016.7732502

A finite element post-processing for skew effects in brushless doubly-fed induction machines

Xuezhou Wang, Tim Strous, Domenico Lahaye, Henk Polinder, Bram Ferreira

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

1 Citation (Scopus)

Abstract

Brushless doubly-fed induction machines have great potential as variable-speed generators in wind turbines. Undesired space harmonics exist because the special rotor needs to couple both stator windings which with different
pole-pair numbers and different frequencies. These undesired space harmonics lead to a bigger torque ripple compared with conventional induction machines. Previously, a 2D multi-slice finite element (FE) method was applied to study the effects of rotor skew on torque responses in brushless DFIMs. It results in a significant computing time because several 2D FE slices are coupled and calculated simultaneously in one model. It is not efficient to use such a model to predict how much average torques and torque ripples would be reduced by
applying skewed slots at the beginning of design. This paper makes use of normal 2D FEM results and applies skew factors in post-processing to investigate the influence of rotor skew on the torque responses. The proposed method can give an approximate prediction of skew effects on torque responses with limited computing time.

Original language	English
Title of host publication	Proceedings - 2016 International Conference on Electrical Machines
Place of Publication	Lausanne, Switzerland
Publisher	IEEE
Pages	32-38
Number of pages	7
ISBN (Electronic)	978-1-5090-2538-1
ISBN (Print)	978-1-2090-2539-8
DOIs	https://doi.org/10.1109/ICELMACH.2016.7732502
Publication status	Published - 2016
Event	2016 XXII International Conference on Electrical Machines (ICEM) - Lausanne, Switzerland Duration: 4 Sept 2016 → 7 Sept 2016

Conference

Conference	2016 XXII International Conference on Electrical Machines (ICEM)
Country/Territory	Switzerland
City	Lausanne
Period	4/09/16 → 7/09/16

Keywords

Brushless
doubly-fed
finite element model
induction machine
multi-slice method
post-processing
skew effects
skew factor
torque ripple

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10.1109/ICELMACH.2016.7732502

Cite this

@inproceedings{6a781645b9fb437ba0cd2476ccf198ce,

title = "A finite element post-processing for skew effects in brushless doubly-fed induction machines",

abstract = "Brushless doubly-fed induction machines have great potential as variable-speed generators in wind turbines. Undesired space harmonics exist because the special rotor needs to couple both stator windings which with differentpole-pair numbers and different frequencies. These undesired space harmonics lead to a bigger torque ripple compared with conventional induction machines. Previously, a 2D multi-slice finite element (FE) method was applied to study the effects of rotor skew on torque responses in brushless DFIMs. It results in a significant computing time because several 2D FE slices are coupled and calculated simultaneously in one model. It is not efficient to use such a model to predict how much average torques and torque ripples would be reduced byapplying skewed slots at the beginning of design. This paper makes use of normal 2D FEM results and applies skew factors in post-processing to investigate the influence of rotor skew on the torque responses. The proposed method can give an approximate prediction of skew effects on torque responses with limited computing time.",

keywords = "Brushless, doubly-fed, finite element model, induction machine, multi-slice method, post-processing, skew effects, skew factor, torque ripple",

author = "Xuezhou Wang and Tim Strous and Domenico Lahaye and Henk Polinder and Bram Ferreira",

year = "2016",

doi = "10.1109/ICELMACH.2016.7732502",

language = "English",

isbn = "978-1-2090-2539-8",

pages = "32--38",

booktitle = "Proceedings - 2016 International Conference on Electrical Machines",

publisher = "IEEE",

address = "United States",

note = "2016 XXII International Conference on Electrical Machines (ICEM) ; Conference date: 04-09-2016 Through 07-09-2016",

}

Wang, X, Strous, T, Lahaye, D , Polinder, H & Ferreira, B 2016, A finite element post-processing for skew effects in brushless doubly-fed induction machines. in Proceedings - 2016 International Conference on Electrical Machines. IEEE, Lausanne, Switzerland, pp. 32-38, 2016 XXII International Conference on Electrical Machines (ICEM), Lausanne, Switzerland, 4/09/16. https://doi.org/10.1109/ICELMACH.2016.7732502

A finite element post-processing for skew effects in brushless doubly-fed induction machines. / Wang, Xuezhou; Strous, Tim; Lahaye, Domenico et al.
Proceedings - 2016 International Conference on Electrical Machines. Lausanne, Switzerland: IEEE, 2016. p. 32-38.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - A finite element post-processing for skew effects in brushless doubly-fed induction machines

AU - Wang, Xuezhou

AU - Strous, Tim

AU - Lahaye, Domenico

AU - Polinder, Henk

AU - Ferreira, Bram

PY - 2016

Y1 - 2016

N2 - Brushless doubly-fed induction machines have great potential as variable-speed generators in wind turbines. Undesired space harmonics exist because the special rotor needs to couple both stator windings which with differentpole-pair numbers and different frequencies. These undesired space harmonics lead to a bigger torque ripple compared with conventional induction machines. Previously, a 2D multi-slice finite element (FE) method was applied to study the effects of rotor skew on torque responses in brushless DFIMs. It results in a significant computing time because several 2D FE slices are coupled and calculated simultaneously in one model. It is not efficient to use such a model to predict how much average torques and torque ripples would be reduced byapplying skewed slots at the beginning of design. This paper makes use of normal 2D FEM results and applies skew factors in post-processing to investigate the influence of rotor skew on the torque responses. The proposed method can give an approximate prediction of skew effects on torque responses with limited computing time.

AB - Brushless doubly-fed induction machines have great potential as variable-speed generators in wind turbines. Undesired space harmonics exist because the special rotor needs to couple both stator windings which with differentpole-pair numbers and different frequencies. These undesired space harmonics lead to a bigger torque ripple compared with conventional induction machines. Previously, a 2D multi-slice finite element (FE) method was applied to study the effects of rotor skew on torque responses in brushless DFIMs. It results in a significant computing time because several 2D FE slices are coupled and calculated simultaneously in one model. It is not efficient to use such a model to predict how much average torques and torque ripples would be reduced byapplying skewed slots at the beginning of design. This paper makes use of normal 2D FEM results and applies skew factors in post-processing to investigate the influence of rotor skew on the torque responses. The proposed method can give an approximate prediction of skew effects on torque responses with limited computing time.

KW - Brushless

KW - doubly-fed

KW - finite element model

KW - induction machine

KW - multi-slice method

KW - post-processing

KW - skew effects

KW - skew factor

KW - torque ripple

U2 - 10.1109/ICELMACH.2016.7732502

DO - 10.1109/ICELMACH.2016.7732502

M3 - Conference contribution

SN - 978-1-2090-2539-8

SP - 32

EP - 38

BT - Proceedings - 2016 International Conference on Electrical Machines

PB - IEEE

CY - Lausanne, Switzerland

T2 - 2016 XXII International Conference on Electrical Machines (ICEM)

Y2 - 4 September 2016 through 7 September 2016

ER -

A finite element post-processing for skew effects in brushless doubly-fed induction machines

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