Global Patent Index - EP 1000458 A1

EP 1000458 A1 2000-05-17 - ELECTRICAL MACHINE WITH SOFT-MAGNETIC TEETH AND A METHOD FOR PRODUCING SAME

Title (en)

ELECTRICAL MACHINE WITH SOFT-MAGNETIC TEETH AND A METHOD FOR PRODUCING SAME

Title (de)

ELEKTRISCHE MASCHINE MIT WEICHMAGNETISCHEN ZÄHNEN UND VERFAHREN ZU IHRER HERSTELLUNG

Title (fr)

MACHINE ELECTRIQUE A DENTS MAGNETIQUES DOUCES ET SON PROCEDE DE FABRICATION

Publication

EP 1000458 A1 (DE)

Application

EP 98942484 A

Priority

  • DE 9801826 W
  • DE 19728172 A
  • US 47760800 A

Abstract (en)

[origin: DE19728172A1] Electrical machines operating according to the reluctance principle have toothed air gap surfaces between their moving and fixed parts. The magnetizability of these teeth directly affects the performance of the machine. According to the invention, the teeth projecting into the air gap consist of a material which in relation to the remaining soft-magnetic body presents better magnetizability and/or greater magnetic saturation flux density. This material is preferably a grain-oriented electric steel sheet or a cobalt-iron alloy. Alternatively or in addition thereto the soft-magnetic body in which the conductor coils are positioned can be made entirely of a grain-oriented material by appropriate segmentation. In this case, every second pole is unspooled and consists of two halves separated by a non-magnetic holding element. The use of steel sheets rolled at angle also contributes to the improved use of space and material in rotating machines, especially in transverse flux machines. The characteristics of the construction provided for in the invention result in the production of little cutting waste and thus raise the performance of electrical machines with soft-magnetic teeth at the air gap surface and reduce losses.

IPC 1-7 (main, further and additional classification)

H02K 19/10; H02K 1/06; H02K 1/14

IPC 8 full level (invention and additional information)

H02K 1/18 (2006.01); H02K 1/00 (2006.01); H02K 1/06 (2006.01); H02K 1/14 (2006.01); H02K 3/00 (2006.01); H02K 3/18 (2006.01); H02K 19/10 (2006.01); H02K 37/00 (2006.01); H02K 37/06 (2006.01); H02K 15/02 (2006.01)

CPC (invention and additional information)

H02K 19/103 (2013.01); H02K 1/06 (2013.01); H02K 1/145 (2013.01); H02K 1/148 (2013.01); H02K 15/02 (2013.01)

Citation (search report)

See references of WO 9901924A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19728172 A1 19990128; DE 19728172 C2 20010329; CN 1261992 A 20000802; EP 1000458 A1 20000517; JP 2002507380 A 20020305; US 2002175586 A1 20021128; US 6960862 B2 20051101; WO 9901924 A1 19990114

INPADOC legal status


2007-08-01 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20070201

2000-05-17 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000126

2000-05-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT