Title:
DCブラシレスモーター
Document Type and Number:
Japanese Patent JP4507316
Kind Code:
B2
Abstract:
According to the invention, a nonoriented electromagnetic steel sheet being small in the magnetic anisotropy in a high frequency zone and thus excellent in the magnetic properties as a rotating machine and having an excellent press formability such as punching property or the like can be obtained stably by adjusting a chemical composition of the oriented electromagnetic steel sheet to a given range, and establishing the following equation (1) between L, C average iron loss W15/50(L+C)ÄW/kgÜ and L, C average magnetic flux density B50(L+C)ÄTÜ with respect to measured values of magnetic properties using Epstein test pieces: B50(L+C) ≥ 0.03 . W15/50(L+C)+1.63 ..... and satisfying a ratio of D iron loss W10/400(D)ÄW/kgÜ to L, C average iron loss W10/400(L+C)ÄW/kgÜ by the following equation (2): W10/400(D)W10/400(L+C) ≤ 1.2 ..... and defining a hardness of the steel sheet in accordance with a sheet thickness and W15/50(L+C).
Inventors:
Toshiro Fujiyama
Keiji Sakai
Keiji Sakai
Application Number:
JP33559799A
Publication Date:
July 21, 2010
Filing Date:
November 26, 1999
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
H01F1/16; H02K29/00; C21D8/12; C22C38/00; C22C38/02; C22C38/04; C22C38/06; C22C38/34; C22C38/42; C22C38/58; C22C38/60
Domestic Patent References:
| JP8041538A |
Attorney, Agent or Firm:
Kenji Sugimura
Kiyoshi Kuruma
Kosaku Sugimura
Kiyoshi Kuruma
Kosaku Sugimura