United States Patent [19] [li] Patent Number: 4,918,347
Takaba [45] Date of Patent: Apr. 17, 1990
US. Patent Apr. 17,1990 sheet 1 of 5 4,918,347
[54] COIL WINDING CONSTRUCTION FOR AN ELECTRIC MOTOR
[75] Inventor: Yosuke Takaba, Iida, Japan
[73] Assignee: Tamagawa Seiki Kabushiki Kaisha, Tokyo, Japan
[21] Appl. No.: 248,424
[22] Filed: Sep. 23, 1988
[30] Foreign Application Priority Data
Jul. 21, 1988 [JP] Japan 63-95675[U]
[51] Int. CI.4 H02K 3/00; H02K 1/00
[52] U.S. CI 310/179; 310/180;
310/184
[58] Field of Search 310/179, 180, 184, 185,
310/198, 203, 208, 254
[56] References Cited
U.S. PATENT DOCUMENTS
3,324,322 6/1964 Johns 310/198
3,439,205 3/1966 Houtman 310/180
3,633,056 1/1972 Hoffmeyer 310/185
4,780,634 10/1988 Masterman 310/179
4,806,812 2/1989 Masterman 310/184
FOREIGN PATENT DOCUMENTS
55-63560 5/1980 Japan 310/179
7945 1/1988 Japan .
Primary Examiner—Patrick R. Salce
Attorney, Agent, or Firm—Brooks Haidt Haffner.&
Delahunty
[57] ABSTRACT
This invention relates to a coil construction for an electric motor comprising a stator having a plurality of slots and teeth, a plurality of windings Uc, Vc and Wc of the respective phases are arranged as a plurality of coil series Ci and C2, said coil series C\ and C2 are wound independently each other, whereby it is able to procure a high redundancy of said coil series Ci and C2.
3 Claims, 5 Drawing Sheets
