Title:
ELECTRIC MACHINE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/086966
Kind Code:
A3
Abstract:
The invention relates to an electric machine (10), comprising a stator (20) with a stator core (22) and a rotor (30) with a rotor core (32), wherein the stator core and/or rotor core (22, 32) comprises a plurality of magnetic pockets (34) in each of which at least one permanent magnet (36) is arranged and is connected to the stator core and/or rotor core (22, 32) via a connecting material (38). According to the invention, the connecting material (38) is a foamed polymer. The electric machine (10) can be produced by a method wherein: a1) a permanent magnet (36) is coated at least in certain areas with a foamable polymer material (38'); b1) the permanent magnet (36) coated with the polymer material (38') is introduced into a magnetic pocket (34) of the stator core and/or rotor core (22, 32); c) a gaseous propellant under pressure is applied to the polymer material (38') over a predetermined time, and therefore the propellant dissolves in the polymer material (38'), wherein this step c) is carried out before or after step a1) or after step b1); and d) a phase separation of the propellant and the polymer material is triggered by reducing the pressure and increasing the temperature, and therefore a foamed polymer (38) forms.
Inventors:
BEHRENDT REINER NICO (DE)
Application Number:
PCT/EP2013/075779
Publication Date:
January 15, 2015
Filing Date:
December 06, 2013
Export Citation:
Assignee:
VOLKSWAGEN AG (DE)
International Classes:
H02K15/03; H02K1/17; H02K1/27
Foreign References:
| DE102007063307A1 | 2009-07-02 | |||
| DE102008023999A1 | 2009-11-19 |
Other References:
BEHRENDT N ET AL: "Morphology and electret behaviour of microcellular high glass temperature films", APPLIED PHYSICS A; MATERIALS SCIENCE & PROCESSING, SPRINGER, BERLIN, DE, vol. 85, no. 1, 1 August 2006 (2006-08-01), pages 87 - 93, XP019424444, ISSN: 1432-0630, DOI: 10.1007/S00339-006-3660-7
SUN H ET AL: "Microcellular foams from polyethersulfone and polyphenylsulfone - Preparation and mechanical properties", EUROPEAN POLYMER JOURNAL, PERGAMON PRESS LTD. OXFORD, GB, vol. 38, no. 12, 1 December 2002 (2002-12-01), pages 2373 - 2381, XP004389372, ISSN: 0014-3057, DOI: 10.1016/S0014-3057(02)00149-0
SUN H ET AL: "Microcellular foams from polyethersulfone and polyphenylsulfone - Preparation and mechanical properties", EUROPEAN POLYMER JOURNAL, PERGAMON PRESS LTD. OXFORD, GB, vol. 38, no. 12, 1 December 2002 (2002-12-01), pages 2373 - 2381, XP004389372, ISSN: 0014-3057, DOI: 10.1016/S0014-3057(02)00149-0
Attorney, Agent or Firm:
GULDE HENGELHAUPT ZIEBIG & SCHNEIDER (Berlin, DE)
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