Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines

Wenping Chai; Byung Il Kwon

doi:10.30941/CESTEMS.2021.00037

Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines

Wenping Chai^*
, Byung Il Kwon

^*Corresponding author for this work

School of New Energy, Harbin Institute of Technology Weihai
Hanyang University

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

—This study proposes a novel asymmetric rotor pole design for wound field synchronous machines (WFSMs), which can achieve high saliency ratio and also low torque ripple. The key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped (ICS) plus reverse 3^rd harmonic shaping. The asymmetric rotor pole can help to improve the average output torque by enhancing the saliency ratio. The reverse 3^rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque ripple. To certify the effectivity of the proposed design, three-phase 54-slot / 6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3^rd harmonic are utilized as the basic model and referenced model for comparison. For the referenced model, the optimum amplitude of reverse 3^rd harmonic is preferred as 1/6. Finally, all electromagnetic characteristics of the investigated machines are predicted by the finite-element method (FEM). The highest saliency ratio and comparatively low torque ripple have been verified.

Original language	English
Pages (from-to)	321-327
Number of pages	7
Journal	CES Transactions on Electrical Machines and Systems
Volume	5
Issue number	4
DOIs	https://doi.org/10.30941/CESTEMS.2021.00037
State	Published - 1 Dec 2021
Externally published	Yes

Keywords

Asymmetric rotor pole
high saliency ratio
low torque ripple
wound field synchronous machine

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10.30941/CESTEMS.2021.00037

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@article{65dd8ec79d1840c486632391bf11d8ec,

title = "Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines",

abstract = "—This study proposes a novel asymmetric rotor pole design for wound field synchronous machines (WFSMs), which can achieve high saliency ratio and also low torque ripple. The key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped (ICS) plus reverse 3rd harmonic shaping. The asymmetric rotor pole can help to improve the average output torque by enhancing the saliency ratio. The reverse 3rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque ripple. To certify the effectivity of the proposed design, three-phase 54-slot / 6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3rd harmonic are utilized as the basic model and referenced model for comparison. For the referenced model, the optimum amplitude of reverse 3rd harmonic is preferred as 1/6. Finally, all electromagnetic characteristics of the investigated machines are predicted by the finite-element method (FEM). The highest saliency ratio and comparatively low torque ripple have been verified.",

keywords = "Asymmetric rotor pole, high saliency ratio, low torque ripple, wound field synchronous machine",

author = "Wenping Chai and Kwon, \{Byung Il\}",

note = "Publisher Copyright: {\textcopyright} 2021 CES.",

year = "2021",

month = dec,

day = "1",

doi = "10.30941/CESTEMS.2021.00037",

language = "英语",

volume = "5",

pages = "321--327",

journal = "CES Transactions on Electrical Machines and Systems",

issn = "2096-3564",

publisher = "China Electrotechnical Society",

number = "4",

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TY - JOUR

T1 - Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines

AU - Chai, Wenping

AU - Kwon, Byung Il

PY - 2021/12/1

Y1 - 2021/12/1

N2 - —This study proposes a novel asymmetric rotor pole design for wound field synchronous machines (WFSMs), which can achieve high saliency ratio and also low torque ripple. The key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped (ICS) plus reverse 3rd harmonic shaping. The asymmetric rotor pole can help to improve the average output torque by enhancing the saliency ratio. The reverse 3rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque ripple. To certify the effectivity of the proposed design, three-phase 54-slot / 6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3rd harmonic are utilized as the basic model and referenced model for comparison. For the referenced model, the optimum amplitude of reverse 3rd harmonic is preferred as 1/6. Finally, all electromagnetic characteristics of the investigated machines are predicted by the finite-element method (FEM). The highest saliency ratio and comparatively low torque ripple have been verified.

AB - —This study proposes a novel asymmetric rotor pole design for wound field synchronous machines (WFSMs), which can achieve high saliency ratio and also low torque ripple. The key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped (ICS) plus reverse 3rd harmonic shaping. The asymmetric rotor pole can help to improve the average output torque by enhancing the saliency ratio. The reverse 3rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque ripple. To certify the effectivity of the proposed design, three-phase 54-slot / 6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3rd harmonic are utilized as the basic model and referenced model for comparison. For the referenced model, the optimum amplitude of reverse 3rd harmonic is preferred as 1/6. Finally, all electromagnetic characteristics of the investigated machines are predicted by the finite-element method (FEM). The highest saliency ratio and comparatively low torque ripple have been verified.

KW - Asymmetric rotor pole

KW - high saliency ratio

KW - low torque ripple

KW - wound field synchronous machine

UR - https://www.scopus.com/pages/publications/85146337849

U2 - 10.30941/CESTEMS.2021.00037

DO - 10.30941/CESTEMS.2021.00037

M3 - 文章

AN - SCOPUS:85146337849

SN - 2096-3564

VL - 5

SP - 321

EP - 327

JO - CES Transactions on Electrical Machines and Systems

JF - CES Transactions on Electrical Machines and Systems

IS - 4

ER -

Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines

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Keywords

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