| US 7,550,894 B2 | ||
| Rotary electrical machine | ||
| Haruyoshi Hino, Shizuoka (Japan); and Keiko Murota, Shizuoka (Japan) | ||
| Assigned to Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-ken (Japan) | ||
| Filed on Dec. 09, 2005, as Appl. No. 11/298,979. | ||
| Claims priority of application No. 2004-357339 (JP), filed on Dec. 09, 2004; and application No. 2005-133559 (JP), filed on Apr. 28, 2005. | ||
| Prior Publication US 2006/0152104 A1, Jul. 13, 2006 | ||
| Int. Cl. H02K 1/22 (2006.01) | ||
| U.S. Cl. 310—268 [310/191] | 19 Claims |
| 1. A rotary electrical machine comprising:
a rotor rotational about an axis of a rotating shaft in a first rotational direction; and
a stator disposed so as to oppose to the rotor,
wherein one of the rotor and the stator is divided into at least two portions in the axial direction, a first portion of the
at least two portions being movable at least in a rotational direction or a reverse rotational direction of the first rotational
direction relative to a second of the at least two portions in such a manner that a gap between the first portion and the
second portion forms a magnetic resistance that is variable,
the first portion being a first stator core having a first set of teeth, each tooth of the first set of teeth having an end
surface opposite the rotor and a second end surface facing away from the end surface, each tooth of the first set of teeth
having a winding wound around a circumferential side surface thereof, and
the second portion being a second stator core having a second set of teeth, the second set of teeth having end portions facing
the second end surfaces of the first set of teeth.
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