Abstract: Provided is an abrasion test apparatus for measuring an abrasion state of a workpiece, including: a workpiece holding mechanism holding the workpiece; a contact tool repeatedly making contact and non-contact with the workpiece; a rotating mechanism holding the contact tool to be freely rotatable; and a heating mechanism intermittently heating an end portion of the contact tool.

Abstract: Provided is an abrasion test apparatus for measuring an abrasion state of a workpiece, including: a workpiece holding mechanism holding the workpiece; a contact tool repeatedly making contact and non-contact with the workpiece; a rotating mechanism holding the contact tool to be freely rotatable; and a heating mechanism intermittently heating an end portion of the contact tool.

Abstract: In the present spinning method using elements including: a tube material; a pair of chucks which hold both ends of the tube material; and a roller having a predetermined curved shape in order to shape the tube material, in a state that circumferential portions at the both ends of the tube material are fitted in and held by circumferential grooves provided on side surfaces of the chucks, the method includes a step of transferring a curved shape on a side surface of the roller to a side surface of the tube material by rotating the chucks which hold the tube material around a first axis, rotating the roller around a second axis, moving the rotating roller in an X direction, and pressing the side surface of the roller against the side surface of the tube material between the rotating chucks.

Abstract: A claw-pole type dynamo-electric machine, from which an improvement in productivity of stator winding can be expected, has such as a structure that the whole stator wiring is covered with a magnetic body, and thereby the inductance increases to pose the problem of decreasing a power factor. Disclosed is a stator core of a dynamo-electric machine in which a plurality of stator cores of respective phases are arranged independently in the direction of the rotating shaft of a rotor, the magnetic poles of the stator cores are arranged in the shape of a wave in the circumferential direction of the rotating shaft of a rotor, slots extending in the direction of the rotating shaft are formed between respective magnetic poles, and the stator winding can be arranged in a slot formed on the side of the inner end face of the magnetic pole arranged in the shape of a wave and in the axial direction of the rotating shaft.

Abstract: A claw-pole type dynamo-electric machine, from which an improvement in productivity of stator winding can be expected, has such as a structure that the whole stator wiring is covered with a magnetic body, and thereby the inductance increases to pose the problem of decreasing a power factor. Disclosed is a stator core of a dynamo-electric machine in which a plurality of stator cores of respective phases are arranged independently in the direction of the rotating shaft of a rotor, the magnetic poles of the stator cores are arranged in the shape of a wave in the circumferential direction of the rotating shaft of a rotor, slots extending in the direction of the rotating shaft are formed between respective magnetic poles, and the stator winding can be arranged in a slot formed on the side of the inner end face of the magnetic pole arranged in the shape of a wave and in the axial direction of the rotating shaft.

Abstract: A rotating electrical machine including a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein: coil groups are received in a slot between two teeth of the stator core; each of the teeth has a tooth main body and two tooth tip edge portions, and the tooth main body and the tooth tip edge portions are connected by connecting portions, with slits being formed in the coil sides of the connecting portions; and the slits extend from opening portions towards the centers of the tooth tip edge portions in circumferential direction, and are formed so that their tooth main body sides and their tip edge portion sides, that together define the opening portions of the slits, contact one another; with the gaps between adjacent ones of the tooth tip edge portions in circumferential direction being smaller than a width of the slot.

Abstract: A rotating electrical machine includes: a claw pole stator constituted with a stator core that includes a plurality of claw poles and a stator coil wound inside the stator core; and a rotor rotatably disposed at a position facing opposite the claw poles. The stator core is constituted of split blocks each corresponding to at least one of magnetic pole pairs each made up with two claw poles assuming different magnetic polarities when an electric current is supplied to the stator coil.