Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop

Fei Zhao; Liyi Li; Chunhua Liu; Byung-il Kwon

doi:10.1109/ECCE.2017.8095928

Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop

Fei Zhao, Liyi Li, Chunhua Liu, Byung-il Kwon

School of Energy and Environment

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

7 Citations (Scopus)

Abstract

This paper presents a study on design parameters of a permanent magnet vernier motor (PMVM), to discuss their influences independently for motor performance improvement, where the electromagnetic torque and torque ripple are mainly taken into consideration. Basic model of the PMVM is designed with dual-stator, axial-flux topology, spoke-type magnets array, which has the feature of high torque density and relative high power factor at low speed for the direct-drive systems. Compared to a radial-flux motor, the axial-flux motor has non-equal radii in inner side and outer side, which results in extra design considerations in terms of stator slot shape, rotor core shape, and asymmetric overhang lengths. Therefore, the design parameters of slot shape, winding method, rotor core, and rotor overhang length are discussed based on the basic model of axial-flux PMVM under the constraint of motor volume. Motor characteristics are illustrated and analyzed using three dimensional finite element method (3D FEM). Finally, one prototype of optimal designed model is manufactured and tested to verify the improved motor characteristics.

Original language	English
Title of host publication	2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017)
Publisher	IEEE
Pages	1220-1226
ISBN (Electronic)	9781509029976, 9781509029983
ISBN (Print)	9781509029990
DOIs	https://doi.org/10.1109/ECCE.2017.8095928
Publication status	Published - Oct 2017
Event	2017 IEEE Energy Conversion Congress and Exposition (ECCE) - Duke Energy Convention Center, Cincinnati, United States Duration: 1 Oct 2017 → 5 Oct 2017 Conference number: 9th https://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=35415 http://www.ieee-ecce.org

Conference

Conference	2017 IEEE Energy Conversion Congress and Exposition (ECCE)
Place	United States
City	Cincinnati
Period	1/10/17 → 5/10/17
Internet address	https://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=35415 http://www.ieee-ecce.org

Research Keywords

Axial-flux
Dual-stator
FEM
Optimal design
PM vernier motor
Torque density

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10.1109/ECCE.2017.8095928

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@inproceedings{1ab16ed7956d4269a3aa6ed3e9d4d606,

title = "Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop",

abstract = "This paper presents a study on design parameters of a permanent magnet vernier motor (PMVM), to discuss their influences independently for motor performance improvement, where the electromagnetic torque and torque ripple are mainly taken into consideration. Basic model of the PMVM is designed with dual-stator, axial-flux topology, spoke-type magnets array, which has the feature of high torque density and relative high power factor at low speed for the direct-drive systems. Compared to a radial-flux motor, the axial-flux motor has non-equal radii in inner side and outer side, which results in extra design considerations in terms of stator slot shape, rotor core shape, and asymmetric overhang lengths. Therefore, the design parameters of slot shape, winding method, rotor core, and rotor overhang length are discussed based on the basic model of axial-flux PMVM under the constraint of motor volume. Motor characteristics are illustrated and analyzed using three dimensional finite element method (3D FEM). Finally, one prototype of optimal designed model is manufactured and tested to verify the improved motor characteristics.",

keywords = "Axial-flux, Dual-stator, FEM, Optimal design, PM vernier motor, Torque density",

author = "Fei Zhao and Liyi Li and Chunhua Liu and Byung-il Kwon",

year = "2017",

month = oct,

doi = "10.1109/ECCE.2017.8095928",

language = "English",

isbn = "9781509029990",

pages = "1220--1226",

booktitle = "2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017)",

publisher = "IEEE",

address = "United States",

note = "2017 IEEE Energy Conversion Congress and Exposition (ECCE) ; Conference date: 01-10-2017 Through 05-10-2017",

url = "https://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=35415, http://www.ieee-ecce.org",

}

Zhao, F, Li, L, Liu, C & Kwon, B 2017, Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop. in 2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017)., 8095928, IEEE, pp. 1220-1226, 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, Ohio, United States, 1/10/17. https://doi.org/10.1109/ECCE.2017.8095928

Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop. / Zhao, Fei; Li, Liyi; Liu, Chunhua et al.
2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017). IEEE, 2017. p. 1220-1226 8095928.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop

AU - Zhao, Fei

AU - Li, Liyi

AU - Liu, Chunhua

AU - Kwon, Byung-il

N1 - Conference code: 9th

PY - 2017/10

Y1 - 2017/10

N2 - This paper presents a study on design parameters of a permanent magnet vernier motor (PMVM), to discuss their influences independently for motor performance improvement, where the electromagnetic torque and torque ripple are mainly taken into consideration. Basic model of the PMVM is designed with dual-stator, axial-flux topology, spoke-type magnets array, which has the feature of high torque density and relative high power factor at low speed for the direct-drive systems. Compared to a radial-flux motor, the axial-flux motor has non-equal radii in inner side and outer side, which results in extra design considerations in terms of stator slot shape, rotor core shape, and asymmetric overhang lengths. Therefore, the design parameters of slot shape, winding method, rotor core, and rotor overhang length are discussed based on the basic model of axial-flux PMVM under the constraint of motor volume. Motor characteristics are illustrated and analyzed using three dimensional finite element method (3D FEM). Finally, one prototype of optimal designed model is manufactured and tested to verify the improved motor characteristics.

AB - This paper presents a study on design parameters of a permanent magnet vernier motor (PMVM), to discuss their influences independently for motor performance improvement, where the electromagnetic torque and torque ripple are mainly taken into consideration. Basic model of the PMVM is designed with dual-stator, axial-flux topology, spoke-type magnets array, which has the feature of high torque density and relative high power factor at low speed for the direct-drive systems. Compared to a radial-flux motor, the axial-flux motor has non-equal radii in inner side and outer side, which results in extra design considerations in terms of stator slot shape, rotor core shape, and asymmetric overhang lengths. Therefore, the design parameters of slot shape, winding method, rotor core, and rotor overhang length are discussed based on the basic model of axial-flux PMVM under the constraint of motor volume. Motor characteristics are illustrated and analyzed using three dimensional finite element method (3D FEM). Finally, one prototype of optimal designed model is manufactured and tested to verify the improved motor characteristics.

KW - Axial-flux

KW - Dual-stator

KW - FEM

KW - Optimal design

KW - PM vernier motor

KW - Torque density

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DO - 10.1109/ECCE.2017.8095928

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9781509029990

SP - 1220

EP - 1226

BT - 2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017)

PB - IEEE

T2 - 2017 IEEE Energy Conversion Congress and Exposition (ECCE)

Y2 - 1 October 2017 through 5 October 2017

ER -

Design Considerations and Performance Improvement of a Dual-Stator PM Vernier Motor with Axial-Flux Loop

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