公开(公告)号：SE457030B

公开(公告)日：1988-11-21

申请号：SE8701213

申请日：1987-03-24

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  JOHANSSON L ,  KARLSSON T ,  HOLMSTROEM G

IPC: H01B7/02 ,  C08K3/22 ,  H01B3/10 ,  H01B3/30 ,  H01B7/17 ,  H01B17/60 ,  H02K3/40

公开(公告)号：SE457031B

公开(公告)日：1988-11-21

申请号：SE8701214

申请日：1987-03-24

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  JOHANSSON L ,  KARLSSON T ,  HOLMSTROEM G

IPC: C08K3/22 ,  H01B3/30 ,  H01B7/17 ,  H01B7/02 ,  H02K3/40

Abstract: An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 per cent by volume of a powdered filler material in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10 - 10 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.

公开(公告)号：SE8701214L

公开(公告)日：1988-09-25

申请号：SE8701214

申请日：1987-03-24

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  JOHANSSON L ,  KATLSSON T ,  HOLMSTROEM G

IPC: C08K3/22 ,  H01B3/30 ,  H01B7/02 ,  H01B7/17 ,  H02K3/40

Abstract: An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 per cent by volume of a powdered filler material in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10 - 10 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.

公开(公告)号：SE8701213L

公开(公告)日：1988-09-25

申请号：SE8701213

申请日：1987-03-24

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  JOHANSSON L ,  KARLSSON T ,  HOLMSTROEM G

IPC: H01B7/02 ,  C08K3/22 ,  H01B3/10 ,  H01B3/30 ,  H01B7/17 ,  H01B17/60 ,  H02K3/40

公开(公告)号：SE455246B

公开(公告)日：1988-06-27

申请号：SE8604509

申请日：1986-10-22

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  HOLMSTROM G ,  KARLSSON T

IPC: H01B3/04 ,  H02K3/30 ,  H02K3/32 ,  H02K15/12 ,  H01F5/06

Abstract: Coil for arrangement in slots in a stator or rotor of an electrical machine, in particular a high voltage coil, and method for manufacturing the coil. The coil comprising a bundle (17) of conductors (18) arranged adjacent to each other.Each conductor is provided with a conductor insulation (19) and a main insulation (14) surrounds the bundle for insulation of the bundle against the walls of the machine slot. The main insulation comprises a wrapping of a tape- or sheet-formed insulating material, wound in several layers around the conductor bundle and comprising a layer with small mica flakes which, as well as the space between layers of mica flakes in the wrapping, contains a cured impregnating resin. According to the invention at least that part of the impregnating resin located in the spaces between the mica layers contains particles of a filler material with an intrinsic thermal conductivity of at least 5 W/mK and with a grain size of the particles of 0.1-15 mu m in at least 90 per cent by weight of the filler material.

公开(公告)号：SE8604509L

公开(公告)日：1988-04-23

申请号：SE8604509

申请日：1986-10-22

Applicant: ASEA AB

Inventor： HJORTSBERG A ,  HOLMSTROM G ,  KARLSSON T

IPC: H01B3/04 ,  H02K3/30 ,  H02K3/32 ,  H01F5/06 ,  H02K15/12

Abstract: Coil for arrangement in slots in a stator or rotor of an electrical machine, in particular a high voltage coil, and method for manufacturing the coil. The coil comprising a bundle (17) of conductors (18) arranged adjacent to each other.Each conductor is provided with a conductor insulation (19) and a main insulation (14) surrounds the bundle for insulation of the bundle against the walls of the machine slot. The main insulation comprises a wrapping of a tape- or sheet-formed insulating material, wound in several layers around the conductor bundle and comprising a layer with small mica flakes which, as well as the space between layers of mica flakes in the wrapping, contains a cured impregnating resin. According to the invention at least that part of the impregnating resin located in the spaces between the mica layers contains particles of a filler material with an intrinsic thermal conductivity of at least 5 W/mK and with a grain size of the particles of 0.1-15 mu m in at least 90 per cent by weight of the filler material.