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Use of transverse-flux machines in a free-piston generator
KTH, School of Electrical Engineering (EES).
KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
KTH, Superseded Departments, Electrical Systems.
2004 (English)In: IEEE transactions on industry applications, ISSN 0093-9994, E-ISSN 1939-9367, Vol. 40, no 4, 1092-1100 p.Article in journal (Refereed) Published
Abstract [en]

This paper investigates the use of transverse-flux machines (TFMs) in a free-piston generator, an integration of a combustion engine and a linear electrical machine. For hybrid vehicles (the intended application), this integrated device has benefits in efficiency, emissions, reliability, etc. Conventional TFMs are dimensioned and their shortcomings illustrated. Several surface-mounted TFM designs are suggested. These designs, initially believed to be promising, are later discovered to be. poor during the three-dimensional finite-element method (3-D FEM) analysis. These designs suffered from a large axial pole-to-pole armature-flux leakage in the stator. This problem is solved in the proposed buried-magnets TFM variants, for which patents have been filed as well. A 5-kW proof-of-concept prototype of one such design is dimensioned that allowed the near fulfilment of 3-D FEM verifiable system demands. One phase. of this dimensioned three-phase prototype is built. Measurements on this,prototype showed that the use of short pole lengths in the machine had led to manufacturing defects. Nevertheless, the electromagnetic viability of the design could still be approximately verified.

Place, publisher, year, edition, pages
2004. Vol. 40, no 4, 1092-1100 p.
Keyword [en]
free-piston generators, linear machines, low leakage, transverse-flux machines (TFMS)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-23582DOI: 10.1109/TIA.2004.830791ISI: 000222725500023Scopus ID: 2-s2.0-3242885596OAI: oai:DiVA.org:kth-23582DiVA: diva2:342281
Note
QC 20100525 QC 20111018. IEEE International Electric Machines and Drives Conference. Madison, WI. JUN 01-04, 2003 Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Arshad, Waqas M.Thelin, PeterSadarangani, Chandur
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