Abstract: A rotating electric motor includes a rotary shaft capable of rotation, a stator core formed in a cylindrical configuration, a rotor core fixed to the rotary shaft, a magnet set at the rotor core such that a pair of magnetic poles of different magnetism are aligned in the radial direction of the rotor core, a field yoke provided at the perimeter of the stator core, and a winding that can control the magnetic flux density across the rotor core and the stator core by forming a magnetic circuit across the field yoke and the rotor core.

Abstract: A wheel support device (200) includes a spring (302, 304) fitted to an in-wheel motor (70) and damping the vibration of a motor-driven wheel (100) and the in-wheel motor (70) by extending and retracting, a knuckle (180) attached to the spring (302, 304) and rotatably supporting the motor-driven wheel (100), a center part (306) of a dynamic mass damper mechanism (300) vibrating together with the in-wheel motor (70) by a force given from a road surface when a vehicle runs, an upper part (310) thereof restricting the vibration of the in-wheel motor (70) by coming into contact with the center part (306) at a prescribed region, and a cushioning member (322, 324) fitted to a portion of the center part (306) or the upper part (310) corresponding to the prescribed region brought into contact with the other.

Abstract: In a stator core composed of a powder compacted magnetic body, a yoke part comprises a protrusion protruding from an axial end face of a tooth. The tooth has an axial length gradually decreases towards an outside along the radial direction of the stator core, and a circumferential length which gradually increases towards an outside along the radial direction of the stator core. In one of the cross sections of stator core perpendicular to a radial direction, the height difference between axial end faces of the yoke part and the tooth is substantially equal to an axial length of a coil end part. Further, a cross-sectional area of the tooth perpendicular to the radial direction is substantially maintained constant along the radial direction, and the cross-sectional area is secured at a junction between the tooth and the yoke part, while half of the cross-sectional area is secured in a circumferential cross section of the yoke part.

Abstract: An in-wheel motor includes a motor, a shaft, an oil pump and oil paths. The oil pump is provided on one end of the shaft. The motor includes a stator core, stator coils and a rotor. The oil pump pumps up an oil from an oil reservoir via an oil path to supply the pumped-up oil to another oil path. The another oil path supplies the oil from the oil pump to the outer periphery of the stator core of the motor from an opening end.

Abstract: A power magnetic core has a start section and a termination section. In the powder magnetic core, lines of magnetic force are formed from the start section to the termination section. The powder magnetic core comprises a first portion disposed on the shortest magnetic path of the lines of magnetic force that connects the start section and the termination section and having a permeability ?a and a second portion disposed apart from the shortest magnetic path of the lines of magnetic force and having a permeability ?b greater than ?a. With this constitution, a desired magnetic characteristic is achieved, and the iron loss is sufficiently reduced.

Abstract: There is provided a stator of a rotary electric machine in which the proportion of the cross sectional area of a coil in the cross sectional area of the slot is high, and an electric power loss due to leakage flux can be reduced. The stator is a stator of a rotary electric machine including a stator and a rotor. The stator includes a stator core having multiple slots in a direction parallel to a rotational axis of the rotary electric machine, and a laminated flat-body conductor which is formed, in a press process, by laminating a predetermined number of flat-body conductors each of which has a predetermined shape. According to the predetermined shape, the flat-plate conductor has an open end portion such that the flat-plate conductor can be fitted in the stator core. The laminated flat-body conductor is inserted in the slots of the stator core, and the open end portion of the laminated flat-plate conductor is closed, whereby a coil is formed.

Abstract: An in-wheel motor includes a motor, a shaft, an oil pump and oil paths. The oil pump is provided on one end of the shaft. The motor includes a stator core, stator coils and a rotor. The oil pump pumps up an oil from an oil reservoir via an oil path to supply the pumped-up oil to another oil path. The another oil path supplies the oil from the oil pump to the outer periphery of the stator core of the motor from an opening end.

Abstract: A wheel supporting apparatus includes dampers, ball joints, a knuckle, an upper arm and a lower arm. The dampers are attached to a case of an in-wheel motor in the top-bottom direction of the vehicle's body and are connected respectively to the ball joints. The upper arm and the lower arm have respective one-ends connected to respective dampers via the ball joints and respective other ends pivotably fixed to the vehicle's body. The knuckle is connected to the ball joints to rotatably support a wheel hub via hub bearings.

Abstract: An interior permanent magnet rotor which reduces rotor loss when used in combination with a concentrated winding stator is provided. A rotor 20 is an interior permanent magnet rotor formed with permanent magnets 23a and 23b embedded inside a rotor core 22. In the rotor 20, in the rotor core 22, a portion between the permanent magnets 23a and 23b and a rotor outer periphery is constructed by a material having far superior high frequency characteristics than the other portions.

Abstract: Disclosed are a soft magnetic material having an optimum electrical resistivity and a method for producing such a soft magnetic material. The soft magnetic material comprises a plurality of composite magnetic particles. Each of the composite magnetic particles comprises a metal magnetic particle and an insulating coating film which covers the surface of the metal magnetic particle and contains at least one substance selected from the group consisting of zirconium oxide, aluminum oxide and silicon oxide. The soft magnetic material has an electrical resistivity of not less than 3,000 ??cm and not more than 50,000 ??cm, and a magnetic permeability ? of not less than 2,000 and not more than 4,000. A method for producing such a soft magnetic material comprises a step for pressure forming a compaction by compressing a plurality of the composite magnetic particles and a step for subjecting the compaction to a first heat treatment at not less than 400° C. and not more than 900° C.

Abstract: A method for producing a soft magnetic material comprises a step wherein a plurality of composite magnetic particles, each of which is composed of a metal magnetic particle and an insulating coating film covering the surface of the metal magnetic particle, are formed into a compaction, and another step wherein the compaction is subjected to a heat treatment at not less than 400° C. and not more than 900° C. The insulating coating film contains at least one element selected from the group consisting of sulfur, selenium, titanium and aluminum. By having such a constitution, the resulting soft magnetic material can have desired magnetic characteristics.

Abstract: A bearing for supporting rotation of either of a rotor and a planetary gear is supported by a wall disposed between a motor housing and a gear case room. The wall is provided with an opening allowing lubricating oil splashed by a gear to be splashed onto an upper portion of a stator. Some of the lubricating oil passes through an oil passage placed at a central portion of a shaft and through an oil passage provided at a planetary carrier, and is then splashed through the opening onto an outer periphery of a stator coil. Furthermore, the lubricating oil is also splashed by a pinion gear, and is similarly splashed through the opening onto the stator coil and an inner peripheral wall of the motor housing. Accordingly, the stator coil and the stator core are cooled.

Abstract: An in-wheel motor includes a motor generating motive power, a planetary gear arranged toward a wheel disc relative to the motor to reduce an output of the motor, and a shaft arranged toward the wheel disc relative to the planetary gear and connected to a planetary carrier. Shaft is connected to a constant velocity joint transmitting the motive power to wheel disc.

Abstract: An electric rotating machine includes a case, a stator, a rotor and an oil. The stator is comprised of a stator core and a coil. The oil has a volume resistivity ranging from 102 to 109 ?cm and is reserved in a bottom part of the case. The coil is partially immersed in the oil.

Abstract: There is provided a stator of a rotary electric machine in which the proportion of the cross sectional area of a coil in the cross sectional area of the slot is high, and an electric power loss due to leakage flux can be reduced. The stator is a stator of a rotary electric machine including a stator and a rotor. The stator includes a stator core having multiple slots in a direction parallel to a rotational axis of the rotary electric machine, and a laminated flat-body conductor which is formed, in a press process, by laminating a predetermined number of flat-body conductors each of which has a predetermined shape. According to the predetermined shape, the flat-plate conductor has an open end portion such that the flat-plate conductor can be fitted in the stator core. The laminated flat-body conductor is inserted in the slots of the stator core, and the open end portion of the laminated flat-plate conductor is closed, whereby a coil is formed.

Abstract: An in-wheel motor includes a wheel disc, a wheel hub, a case, a motor, a planetary gear and a shaft. The wheel disc is connected to the wheel hub. The planetary gear is connected to the motor's rotor. The case includes subcases and a diaphragm. One subcase is arranged to have a side portion closer to the vehicle's body and accommodates the motor and the planetary gear. The motor and the planetary gear are adjacently arranged and fixed to one subcase. The other subcase is arranged closer to the wheel disc and fixed at a plane perpendicular to the shaft by a screw to one subcase.

Abstract: An in-wheel motor includes a motor, a shaft, an oil pump and oil paths. The oil pump is provided on one end of the shaft. The motor includes a stator core, stator coils and a rotor. The oil pump pumps up an oil from an oil reservoir via an oil path to supply the pumped-up oil to another oil path. The another oil path supplies the oil from the oil pump to the outer periphery of the stator core of the motor from an opening end.

Abstract: In an electrically operated power steering device wherein a rotational shaft of an electric motor is rotationally driven so as to apply a steering assist force to a steering shaft, a stator of the electric motor is provided with teeth portions composed of electromagnetic steel plates, coils wound around the teeth portions, and a yoke portion made of a magnetic substance that accommodates the coils and the teeth portions and can be utilized as a housing. Hence, the electrically operated power steering device can be made simple and compact, and it is possible to ensure running stability of the vehicle appropriately (i.e., to prevent swinging motions in response to a force inputted from the steering wheels).

Abstract: A stator of a dynamo-electric machine which is capable of raising the space factor in each slot and which can easily be assembled incorporates first coil pieces, each of which has a width at the lower portion of the slot being smaller than the width at the upper portion of two slots; and second coil pieces arranged to be fitted to teeth adjacent to the tooth to which the first coil piece is fitted so as to be inserted into the empty space for filling the space. The first and second coil pieces are alternately inserted into the slots of the stator core. The empty space in the slot formed after the first coil piece has been inserted has sides extending parallel with the adjacent tooth or is gradually widened toward the upper portion of the slot. Therefore, the second coil piece can easily be inserted into the slot without interference with another member. Thus, the slots can be filled with the second coil pieces so that the space factor can be raised.

Abstract: An electric motor has a rotor for rotation in a stator and a plurality of permanent magnets arranged on an outer peripheral surface of the rotor. A radially inner side surface of each permanent magnet is a curved to generally be convex in a radially inward direction. The outer peripheral surface of the rotor has curved recess surfaces, each of which contacts the radially inner side curved surface of a corresponding permanent magnet so that magnetic flux between adjacent permanent magnets is considerably prevented from locally concentrating within the rotor.