Rapid analytical optimization of eddy-current shield thickness for associated loss minimization in electrical machines

Manoj R. Shah; Sang Bin Lee

doi:10.1109/TIA.2006.873671

Rapid analytical optimization of eddy-current shield thickness for associated loss minimization in electrical machines

Manoj R. Shah, Sang Bin Lee

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

70 Citations (Scopus)

Abstract

A copper or another high-conductivity shield is often used for coating the solid rotor for reducing the armature-reaction space and time-harmonic-induced surface eddy-current losses in a solid-rotor synchronous machine. Since finite-element-simulation-based surface-loss evaluation for shield design can be very time consuming and complicated; a simple analytical model for calculating the surface losses is derived in this paper. A set of equations is derived based on Maxwell's equations for a general case and applied to a solid-rotor synchronous machine. Simulation results are provided to show that the proposed analytical model can serve as an effective screening tool for determining the optimal shield thickness for minimizing the rotor surface losses. The model is useful for assisting the shield-design process for synchronous machines with solid rotors, especially for high-speed machines operating in conjunction with power electronic converters.

Original language	English
Pages (from-to)	642-649
Number of pages	8
Journal	IEEE Transactions on Industry Applications
Volume	42
Issue number	3
DOIs	https://doi.org/10.1109/TIA.2006.873671
Publication status	Published - 2006 May

Bibliographical note

Funding Information:
Paper IPCSD 05-113, presented at the 2005 IEEE International Electric Machines and Drives Conference, San Antonio, TX, May 15–18, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. Manuscript submitted for review September 1, 2005 and released for publication February 21, 2006. The work of S. B. Lee was supported by a Korea University Grant.

Keywords

AC machines
Eddy currents
Harmonic analysis
Magnetic losses
Magnetic shielding

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1109/TIA.2006.873671

Cite this

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title = "Rapid analytical optimization of eddy-current shield thickness for associated loss minimization in electrical machines",

abstract = "A copper or another high-conductivity shield is often used for coating the solid rotor for reducing the armature-reaction space and time-harmonic-induced surface eddy-current losses in a solid-rotor synchronous machine. Since finite-element-simulation-based surface-loss evaluation for shield design can be very time consuming and complicated; a simple analytical model for calculating the surface losses is derived in this paper. A set of equations is derived based on Maxwell's equations for a general case and applied to a solid-rotor synchronous machine. Simulation results are provided to show that the proposed analytical model can serve as an effective screening tool for determining the optimal shield thickness for minimizing the rotor surface losses. The model is useful for assisting the shield-design process for synchronous machines with solid rotors, especially for high-speed machines operating in conjunction with power electronic converters.",

keywords = "AC machines, Eddy currents, Harmonic analysis, Magnetic losses, Magnetic shielding",

author = "Shah, {Manoj R.} and Lee, {Sang Bin}",

note = "Funding Information: Paper IPCSD 05-113, presented at the 2005 IEEE International Electric Machines and Drives Conference, San Antonio, TX, May 15–18, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. Manuscript submitted for review September 1, 2005 and released for publication February 21, 2006. The work of S. B. Lee was supported by a Korea University Grant.",

year = "2006",

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doi = "10.1109/TIA.2006.873671",

language = "English",

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pages = "642--649",

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AU - Shah, Manoj R.

AU - Lee, Sang Bin

N1 - Funding Information: Paper IPCSD 05-113, presented at the 2005 IEEE International Electric Machines and Drives Conference, San Antonio, TX, May 15–18, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. Manuscript submitted for review September 1, 2005 and released for publication February 21, 2006. The work of S. B. Lee was supported by a Korea University Grant.

PY - 2006/5

Y1 - 2006/5

N2 - A copper or another high-conductivity shield is often used for coating the solid rotor for reducing the armature-reaction space and time-harmonic-induced surface eddy-current losses in a solid-rotor synchronous machine. Since finite-element-simulation-based surface-loss evaluation for shield design can be very time consuming and complicated; a simple analytical model for calculating the surface losses is derived in this paper. A set of equations is derived based on Maxwell's equations for a general case and applied to a solid-rotor synchronous machine. Simulation results are provided to show that the proposed analytical model can serve as an effective screening tool for determining the optimal shield thickness for minimizing the rotor surface losses. The model is useful for assisting the shield-design process for synchronous machines with solid rotors, especially for high-speed machines operating in conjunction with power electronic converters.

AB - A copper or another high-conductivity shield is often used for coating the solid rotor for reducing the armature-reaction space and time-harmonic-induced surface eddy-current losses in a solid-rotor synchronous machine. Since finite-element-simulation-based surface-loss evaluation for shield design can be very time consuming and complicated; a simple analytical model for calculating the surface losses is derived in this paper. A set of equations is derived based on Maxwell's equations for a general case and applied to a solid-rotor synchronous machine. Simulation results are provided to show that the proposed analytical model can serve as an effective screening tool for determining the optimal shield thickness for minimizing the rotor surface losses. The model is useful for assisting the shield-design process for synchronous machines with solid rotors, especially for high-speed machines operating in conjunction with power electronic converters.

KW - AC machines

KW - Eddy currents

KW - Harmonic analysis

KW - Magnetic losses

KW - Magnetic shielding

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DO - 10.1109/TIA.2006.873671

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JF - IEEE Transactions on Industry Applications

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ER -

Rapid analytical optimization of eddy-current shield thickness for associated loss minimization in electrical machines

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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