| 摘要 |
A plurality of coils C1 to Cm that constitutes a whole winding L of each phase is divided into g coil groups G1 to Gg for each phase. Each coil group is, for example, constituted by coils C1 to C4 wound around four polar teeth continuously disposed. The number of turns of respective end coils C1 to C4 of the coil group is less than the number of turns of central coils C2 and C3. Further, the whole winding L includes n partial windings N1 to Nn, in which a coil Cj (j is an integer in the range from 1 to m) is constituted by n sub coils S(1,j) to S(n,j) that are formed by the n partial windings. It is feasible to set a non-integer value as an effective number of turns of a coil when the number of turns of each sub coil is appropriately selected. |
| 主权项 |
1. A three-phase AC motor comprising:
a stator that includes T polar teeth arrayed in a circumferential direction and a whole winding formed from a plurality of coils wound in a concentrated manner around the polar teeth, and a rotor disposed in a confronting relationship with the polar teeth, wherein the plurality of coils forming the whole winding of each of said phases is divided into g coil groups for said each of said phases, wherein each divided coil group comprises coils wound around h of said polar teeth continuously disposed, and d coils of a coil group continuously disposed from an end thereof share at least one polar tooth with coils of a neighboring coil group, wherein the following relationship is satisfied, wherein T represents said number of polar teeth, g represents said number of coil groups, h represents said number of consecutive coils, and d represent said number of coil sharing,
T=3×g×(h−d) wherein the whole winding is comprised of n partial windings that are parallel to each other, in which one coil of the whole winding is comprised of n sub coils having a predetermined number of turns, which are formed by the n partial windings, wherein a total number of turns of sub coils that belong to one partial winding is common between respective partial windings, and wherein a polar tooth sharing coil turn number, which is an effective number of turns of a coil that shares at least one of said polar teeth with the neighboring coil group, is less than a polar tooth monopolizing coil turn number, which is an effective number of turns of a coil that does not share any of said polar teeth with the neighboring coil group. |
