US 7,554,238 B2
Multi-winding motor with reduced impedance unbalance
Toshihito Miyashita, Tokyo (Japan); Shintarou Koichi, Tokyo (Japan); Kazuyoshi Murata, Tokyo (Japan); and Masanori Sakai, Tokyo (Japan)
Assigned to Sanyo Denki Co., Ltd., Tokyo (Japan)
Filed on Mar. 30, 2006, as Appl. No. 11/278,025.
Claims priority of application No. 2005-102702 (JP), filed on Mar. 31, 2005.
Prior Publication US 2006/0220486 A1, Oct. 05, 2006
Int. Cl. H02K 1/00 (2006.01)
U.S. Cl. 310—184  [310/179] 14 Claims
OG exemplary drawing
 
1. A multi-winding motor, comprising:
a stator core having F×M (F and M being an integer of 2 or more) magnetic pole sections; and
N (N being a measure of M) F-phase exciting windings wound on said F×M magnetic pole sections,
wherein said F×M magnetic pole sections are provided with N kinds of discrete winding wirings distinguished from each other depending on disposed positions at which the discrete winding wirings are disposed with respect to said magnetic pole sections;
wherein an exciting winding for one phase in one F-phase exciting winding of said N F-phase exciting windings is constructed from M of said N kinds of discrete winding wirings provided at each of the F×M magnetic pole sections, the M discrete winding wirings being selected one by one from those provided at each of M magnetic pole sections selected from said F×M magnetic pole sections; an exciting winding for one phase in another F-phase exciting winding of said N F-phase exciting windings is constructed from M of said N kinds of discrete winding wirings other than those already selected at each of the magnetic pole sections, the M discrete winding wirings being selected one by one from those not yet selected at each of M magnetic pole sections selected from said F×M magnetic pole sections; thus, N exciting windings are constructed for said M magnetic pole sections;
wherein said N F-phase exciting windings are constructed in such a manner that corresponding N of said exciting windings form an identical phase of said N F phase exciting windings; and
wherein said M discrete winding wirings constructing the exciting winding for one phase include M/N discrete winding wirings selected from each of said N kinds of discrete winding wirings.