Abstract: A rotating electrical machine includes a stator having a stator core, coil groups, and a rotor. The coil groups include a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The first and second coil groups are formed into an annular shape by inserting unit coils into stator core slots so that the coils adjacent in a circumferential direction overlap alternately in a radial direction and so that an inside and an outside of the overlap alternate with each other. The first coil group is disposed to surround an outside of the second coil group. The first and second coil groups are disposed in a concentric manner. The unit coils constituting the second coil group have shorter circumferential lengths than the unit coils constituting the first coil group.

Abstract: A rotating electrical machine includes a stator having a stator core and a plurality of groups of coils formed by inserting a plurality of unit coils into slots of the stator core in a lap winding manner and a rotor rotatably mounted on the stator. The plurality of coil groups includes a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The unit coils constituting the second coil group has shorter circumferences than the unit coils constituting the first coil group.

Abstract: A motor including a stator provided with a claw pole; and a rotor having a magnet confronting the stator; wherein the claw pole is magnetically asymmetrical.

Abstract: A small power generating system includes a turbine driven by a fluid, a small high-speed rotation power generator including a permanent magnet rotor having a permanent magnet and rotated together with the turbine and a plurality of stator coils each of which is comprised of a coreless coil, the rotor being rotated such that voltage is induced on the stator coils, whereby power is generated by the power generator, and a back yoke disposed at one of two opposed sides of the stator coils which is opposed to the other side thereof further confronting the permanent magnet of the rotor, the back yoke being made of a magnetic material with a predetermined electrical resistance.

Abstract: A small power generating system includes a turbine driven by a fluid, a power generator including a permanent magnet rotor having a permanent magnet and rotated together with the turbine and a plurality of stator coils each of which is comprised of a coreless coil, the rotor being rotated such that voltage is induced on the stator coils, whereby power is generated by the power generator, and a back yoke disposed at one of two opposed sides of the stator coils which is opposed to the other side thereof further confronting the permanent magnet of the rotor, the back yoke being made of a magnetic material with a predetermined electrical resistance.

Abstract: A pump according to the present invention includes a casing including a pump chamber through which a fluid flows, an impeller rotatably mounted inside the pump chamber, a suction port mounted on the casing for suctioning the fluid into the pump chamber by the rotation of the impeller; and a discharge port mounted on the casing for discharging the fluid out of the pump chamber by the rotation of the impeller, and the suction port and the discharge port are oriented so as to extend in different directions.

Abstract: A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed.

Abstract: A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed.