Clearance seal compressors with linear motor drives part I: background and system analysis

Liang, Kun, Dadd, Mike and Bailey, Paul (2013) Clearance seal compressors with linear motor drives part I: background and system analysis. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 227 (3). pp. 242-251. ISSN 0957-6509

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Abstract

Linear compressors with clearance seals and flexure bearings have been used for many years for space applications, and this article describes the development of linear compressors at Oxford. A new design of moving magnet motor is introduced and the use of flexure springs, linear motors, valves and their integration are all discussed. A ring down test indicates that the ‘viscous’ damping in the linear compressor is acceptable (in terms of the decay ratio against the number of periods). The measured motor characteristics compared well with the vector fields electromagnetic finite element model. With a revised structural design it is predicted that the motor efficiency would be 86% for the rated power (200W shaft power at 50 Hz) enabling the linear compressor to have a high overall efficiency. The companion paper covers the experimental evaluation of the linear compressor.

Item Type: Article
Keywords: Linear compressor, clearance seal, moving magnet motor, flexure springs, valves, magnetic forces, ring down test, motor characteristics, efficiency
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Kun Liang
Date Deposited: 17 Oct 2016 10:25
Last Modified: 08 Mar 2017 07:41
URI: http://sro.sussex.ac.uk/id/eprint/64730

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