| US 7,579,739 B2 | ||
| Rotary electro-dynamic machine and armature winding thereof | ||
| Masafumi Fujita, Yokohama (Japan); Tadashi Tokumasu, Tokyo (Japan); Yasuo Kabata, Yokohama (Japan); Masanori Arata, Yokohama (Japan); Mikio Kakiuchi, Yokohama (Japan); and Susumu Nagano, Kawasaki (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/979,274. | ||
| Application 11/979274 is a division of application No. 11/240567, filed on Oct. 03, 2005, granted, now 7,312,552. | ||
| Claims priority of application No. 2004-293051 (JP), filed on Oct. 05, 2004. | ||
| Prior Publication US 2008/0252169 A1, Oct. 16, 2008 | ||
| Int. Cl. H02K 1/00 (2006.01) | ||
| U.S. Cl. 310—216 [310/209; 310/213] | 9 Claims |
| 1. A rotary electro-dynamic machine comprising,
a rotor having a rotating shaft rotatably supported;
a stator core in which plural winding slots extending along the axis of the rotating shaft of the rotor are arranged and plural
ventilating ducts are arranged in a radial direction, and an armature winding constituted by many strand conductors stored
and piled in each of the winding slots,
the strand conductors being formed so as to be twisted and transposed continuously toward the extending direction of the winding
slots at portions stored in the winding slots, and the strand conductors being short-circuited at the ends of the armature
winding which protrude outward from the sides of the stator core, wherein
the length of the stator core corresponding to transposition pitch 180 degrees of the strand conductors is set as one core
unit area, sub core sections including portions where space factors are different from that of the stator core such that the
total sum of inter-strand voltages induced in the strand conductors in an odd-numbered core unit area from one end portion
of the stator core offsets the total sum of inter-strand voltages induced in the strand conductors in an even-numbered core
unit area from the end portion of the stator core.
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