Improvements in electrical machines

Details Improvements in electrical machines Improvements in electrical machines

H - Electricity

02

K

H02K 3/40 (2006.01) H02K 3/30 (2006.01) H02K 3/487 (2006.01) H02K 15/12 (2006.01)

Patent

CA 2368557

A composite conductor (30) comprises strands (31) of conductor material forming a conductor bundle (32) of generally rectangular shape, the strands being insulated from each other within the bundle. An insulating sleeve (36) of homogeneous polymeric material surrounds the conductor bundle (32); the insulating sleeve also having a rectangular shape. The polymeric material of the sleeve is filled with at least one insulating filler material which conducts heat more efficiently than the polymer alone, and a coating of conductive material (38) forms a corona shield on the inner and outer surfaces of the insulating sleeve. By virtue of its construction and the materials it uses, the composite conductor (30) provides a high efficiency winding (46) for the stator (40) of an electrical machine. The invention also includes a stator having a winding comprising the composite conductor and manufacturing methods for the composite conductor and the stator.

L'invention concerne un conducteur composite (30) constitué de fils (31) de matériau conducteur formant un faisceau (32) de conducteurs généralement rectangulaire, à l'intérieur duquel lesdits fils sont isolés les uns des autres. Un manchon d'isolation (36) en matériau polymère homogène, également de forme rectangulaire, entoure le faisceau (32) de conducteurs. Le matériau polymère du manchon est rempli avec au moins un matériau de remplissage isolant qui conduit la chaleur plus efficacement que le polymère seul, et un revêtement en matériau conducteur (38) forme un dispositif anti-effluves sur les surfaces internes et externes du manchon d'isolation. De par sa construction et les matériaux utilisés, le conducteur composite (30) présente au stator (40) d'une machine électrique un bobinage (46) à haut rendement. L'invention concerne en outre un stator pourvu d'un bobinage constitué du conducteur composite, ainsi que des procédés de fabrication du conducteur composite et du stator.

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