Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM

Greg Heins; Mark Thiele

doi:10.1109/IECON.2011.6119622

Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM

Greg Heins, Mark Thiele

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper published in Proceedings › peer-review

4 Citations (Scopus)

Abstract

Theoretically, the layout of fractional pitch permanent magnet motors should ensure the cancellation of most cogging torque harmonics. In reality, manufacturing errors lead to incomplete cancellation and higher than expected cogging torque. Two potential manufacturing errors are the variation in angle between successive magnets and the strength of the magnets. To determine the sensitivity of cogging torque to magnet strength and placement, a superposition technique is used. This technique is validated by first demonstrating that the total cogging torque can be reconstructed by summing offset versions of the torque from experimentally determined single-magnet/singleslot interactions. Following this validation, Monte Carlo simulations are conducted to statistically determine the sensitivity of cogging torque to magnet placement and strength errors. It is demonstrated that the mean RMS cogging torque increases by 4 % for every degree increase in magnet placement standard deviation and by 0.06% for every 1% increase in magnet strength standard deviation.

Original language	English
Title of host publication	IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Place of Publication	New York, USA
Publisher	IEEE, Institute of Electrical and Electronics Engineers
Pages	2042-2047
Number of pages	6
ISBN (Print)	978-1-61284-972-0
DOIs	https://doi.org/10.1109/IECON.2011.6119622
Publication status	Published - 2011
Event	Annual Conference of the IEEE Industrial Electronics Society (IECON 2011 37th) - Melbourne, Australia, Melbourne, VIC, Australia Duration: 7 Nov 2011 → 10 Nov 2011 Conference number: 2011 (37th)

Conference

Conference	Annual Conference of the IEEE Industrial Electronics Society (IECON 2011 37th)
Abbreviated title	IECON
Country/Territory	Australia
City	Melbourne, VIC
Period	7/11/11 → 10/11/11

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Access to Document

10.1109/IECON.2011.6119622

Cite this

@inproceedings{bac4b8dafb524f70a8b77c0b68bd9a9a,

title = "Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM",

abstract = "Theoretically, the layout of fractional pitch permanent magnet motors should ensure the cancellation of most cogging torque harmonics. In reality, manufacturing errors lead to incomplete cancellation and higher than expected cogging torque. Two potential manufacturing errors are the variation in angle between successive magnets and the strength of the magnets. To determine the sensitivity of cogging torque to magnet strength and placement, a superposition technique is used. This technique is validated by first demonstrating that the total cogging torque can be reconstructed by summing offset versions of the torque from experimentally determined single-magnet/singleslot interactions. Following this validation, Monte Carlo simulations are conducted to statistically determine the sensitivity of cogging torque to magnet placement and strength errors. It is demonstrated that the mean RMS cogging torque increases by 4 \% for every degree increase in magnet placement standard deviation and by 0.06\% for every 1\% increase in magnet strength standard deviation. ",

keywords = "Cogging torque, Manufacturing errors, Monte Carlo Simulation, Permanent magnet motor, Standard deviation, Superposition technique, AC motors, Computer simulation, Errors, Industrial electronics, Manufacture, Monte Carlo methods, Permanent magnets, Statistics, Torque",

author = "Greg Heins and Mark Thiele",

year = "2011",

doi = "10.1109/IECON.2011.6119622",

language = "English",

isbn = "978-1-61284-972-0",

pages = "2042--2047",

booktitle = "IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society",

publisher = "IEEE, Institute of Electrical and Electronics Engineers",

address = "United States",

note = "Annual Conference of the IEEE Industrial Electronics Society (IECON 2011 37th), IECON ; Conference date: 07-11-2011 Through 10-11-2011",

}

Heins, G & Thiele, M 2011, Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM. in IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society. IEEE, Institute of Electrical and Electronics Engineers, New York, USA, pp. 2042-2047, Annual Conference of the IEEE Industrial Electronics Society (IECON 2011 37th), Melbourne, VIC, Australia, 7/11/11. https://doi.org/10.1109/IECON.2011.6119622

Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM. / Heins, Greg; Thiele, Mark.
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society. New York, USA: IEEE, Institute of Electrical and Electronics Engineers, 2011. p. 2042-2047.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper published in Proceedings › peer-review

TY - GEN

T1 - Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM

AU - Heins, Greg

AU - Thiele, Mark

N1 - Conference code: 2011 (37th)

PY - 2011

Y1 - 2011

N2 - Theoretically, the layout of fractional pitch permanent magnet motors should ensure the cancellation of most cogging torque harmonics. In reality, manufacturing errors lead to incomplete cancellation and higher than expected cogging torque. Two potential manufacturing errors are the variation in angle between successive magnets and the strength of the magnets. To determine the sensitivity of cogging torque to magnet strength and placement, a superposition technique is used. This technique is validated by first demonstrating that the total cogging torque can be reconstructed by summing offset versions of the torque from experimentally determined single-magnet/singleslot interactions. Following this validation, Monte Carlo simulations are conducted to statistically determine the sensitivity of cogging torque to magnet placement and strength errors. It is demonstrated that the mean RMS cogging torque increases by 4 % for every degree increase in magnet placement standard deviation and by 0.06% for every 1% increase in magnet strength standard deviation.

AB - Theoretically, the layout of fractional pitch permanent magnet motors should ensure the cancellation of most cogging torque harmonics. In reality, manufacturing errors lead to incomplete cancellation and higher than expected cogging torque. Two potential manufacturing errors are the variation in angle between successive magnets and the strength of the magnets. To determine the sensitivity of cogging torque to magnet strength and placement, a superposition technique is used. This technique is validated by first demonstrating that the total cogging torque can be reconstructed by summing offset versions of the torque from experimentally determined single-magnet/singleslot interactions. Following this validation, Monte Carlo simulations are conducted to statistically determine the sensitivity of cogging torque to magnet placement and strength errors. It is demonstrated that the mean RMS cogging torque increases by 4 % for every degree increase in magnet placement standard deviation and by 0.06% for every 1% increase in magnet strength standard deviation.

KW - Cogging torque

KW - Manufacturing errors

KW - Monte Carlo Simulation

KW - Permanent magnet motor

KW - Standard deviation

KW - Superposition technique

KW - AC motors

KW - Computer simulation

KW - Errors

KW - Industrial electronics

KW - Manufacture

KW - Monte Carlo methods

KW - Permanent magnets

KW - Statistics

KW - Torque

U2 - 10.1109/IECON.2011.6119622

DO - 10.1109/IECON.2011.6119622

M3 - Conference Paper published in Proceedings

SN - 978-1-61284-972-0

SP - 2042

EP - 2047

BT - IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society

PB - IEEE, Institute of Electrical and Electronics Engineers

CY - New York, USA

T2 - Annual Conference of the IEEE Industrial Electronics Society (IECON 2011 37th)

Y2 - 7 November 2011 through 10 November 2011

ER -

Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM

Abstract

Conference

UN SDGs

Access to Document

Fingerprint

Cite this