H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/106, 26/119,
H02K 3/30 (2006.01) H01B 3/04 (2006.01) H02K 3/32 (2006.01) H02K 15/12 (2006.01)
Patent
CA 1289610
ABSTRACT A coil for arrangement in slots in a stator or rotor of an electrical machine, in particular a high voltage coil, comprising a bundle (17) of a plurality of conductors (18) located adjacent to each other and provided with a conductor insulation (19) for insulation of the conductors from each other as well as a main insulation (14) surrounding the bundle for insulation of the bundle against the machine slot. The main insulation con- sists of a wrapping of a tape- or sheet-formed insulating material wound in several layers around the bundle and comprising a layer with small mica flakes which, as well as the spaces between layers of mica flakes in the wrapping, contains a cured impregnating resin. At least that part of the impregnating resin located in the spaces between mica layers contains particles of a filler with an intrinsic thermal conductivity of at least 5 W/mK, such as aluminium oxide or boron nitride, and with a grain size of the particles of 0.1-15 µm in at least 90 per cent of the filler (Figure 2).
549875
Hjortsberg Arne
Holmstrom Goran
Karlsson Thommy
Asea Aktiebolag
Robic
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