Abstract: An electro-hydraulic power steering apparatus in which a control device, a motor and a pump are integrated. The apparatus includes a first housing, a second housing, a control device surrounded by the first and second housings, a motor disposed on a side of the first housing and a pump disposed on a side of the second housing. The motor includes a rotor, a stator and a frame. The rotor has a first bearing supported by the first housing. The frame includes an inner circumferential face into which a stator core is press fitted and receives a second bearing of the rotor. The frame is secured to the first housing by a first clamp screw. The first housing and the second housing are secured by a second clamp screw. The first and second clamp screws are tightened from the hand of the frame.

Abstract: A method for manufacturing a rotation angle detector is provided. An insulator is mounted on a sensor core. A plurality of winding slackening pins are disposed at predetermined positions between a plurality of teeth and a plurality of terminal pins so as to project out of the a first surface side of the insulator. A first and second conductor wire are wound so as to dispose a first and second lead wire portion of each conductor wire wound on the teeth under tension between the teeth and the terminal pin by hooking each wire lead portion onto a winding hooking pin and a winding slackening pin. The winding slackening pins are removed so that the first and second lead wire portions have a predetermined amount of slack.

Abstract: A rotation angle detector includes a stator core (2) comprised of a plurality of core sheets (4) each having plural core members (4a) each including a tooth and a yoke portion (5a, . . . , 5h, 4b) disposed in a strip-like array with adjacent core members being coupled to one another by coupling means (4d) at yoke end portion. The core member is laminated. The stator core is shaped into an annular form by bending the core members at coupled portions so that the tooth portions extend centrally while capable of extending substantially linearly upon expansion thereof. An exciting winding (8) and output windings (9, 10) of n phases are wound on the tooth portions. A rotor core (3) is disposed rotatably relative to the stator core such that gap permeance between the rotor core and the tooth portions changes sinusoidally as a function of the rotation angle.

Abstract: Upper and lower insulators are mounted so as to electrically insulate a sensor core and a sensor coil, a connector is formed integrally with the upper insulator so as to be positioned on an outer circumferential side of a yoke of the sensor core, and lead wire portions of conductor wires constituting an excitation winding and an output winding of the sensor coil are joined to terminal pins on an upper surface of the upper insulator so as to have a predetermined amount of slack.

Abstract: A permanent magnet motor having a rotor with permanent magnets disposed on the outer circumferential face at a predetermined interval in a peripheral direction, and a stator with magnetic pole pieces arranged at a predetermined spacing in the peripheral direction, the magnetic pole pieces being opposed to the permanent magnets, the stator surrounding the rotor, wherein auxiliary grooves are provided on a face of each magnetic pole piece of the stator opposed to the permanent magnets of the rotor, and a skew having an electric angle in a range of 61° to 84° is provided relatively between the rotor and the stator.

Abstract: A permanent magnet motor having a rotor with permanent magnets disposed on the outer circumferential face at a predetermined interval in a peripheral direction, and a stator with magnetic pole pieces arranged at a predetermined spacing in the peripheral direction, the magnetic pole pieces being opposed to the permanent magnets, the stator surrounding the rotor, wherein the auxiliary grooves are provided on a face of each magnetic pole piece of the stator opposed to the permanent magnets of the rotor, and a skew having an electric angle of 72° is provided relatively between the rotor and the stator.

Abstract: A permanent magnet motor having a rotor with permanent magnets disposed on the outer circumferential face at a predetermined interval in a peripheral direction, and a stator with magnetic pole pieces arranged at a predetermined spacing in the peripheral direction, the magnetic pole pieces being opposed to the permanent magnets, the stator surrounding the rotor, wherein auxiliary grooves are provided on a face of each magnetic pole piece of the stator opposed to the permanent magnets of the rotor, and a skew having an electric angle in a range of 61° to 84° is provided relatively between the rotor and the stator.

Abstract: An electro-hydraulic power steering apparatus in which a control device, a motor and a pump are integrated. The apparatus includes a first housing, a second housing, a control device surrounded by the first and second housings, a motor disposed on a side of the first housing and a pump disposed on a side of the second housing. The motor includes a rotor, a stator and a frame. The rotor has a first bearing supported by the first housing. The frame includes an inner circumferential face into which a stator core is press fitted and receives a second bearing of the rotor. The frame is secured to the first housing by a first clamp screw. The first housing and the second housing are secured by a second clamp screw. The first and second clamp screws are tightened from the hand of the frame.

Abstract: A motor for use with a motorized power steering apparatus is provided in which the number of component members can be reduced, and workability in assembling the component members can be improved, while enabling miniaturization of the entire motor. The motor includes a bottomed cylindrical frame 31, a bracket 32 fixedly secured to the frame 31, a rotating element 8 having a shaft 7 rotatably supported by a frame side bearing 110 fixedly mounted on the frame 31 and a bracket side bearing 100 fixedly mounted on the bracket 32, a stationary element 6 fixedly attached to the frame 31 around an outer periphery of the rotating element 8 and having a stator winding 18 wound therearound, a rotation sensor 15 provided on the bracket 32 at a housing side of the bracket side bearing 100, and a plurality of sensor signal wires 38 for supplying and receiving signals to and from the rotation sensor 15.

Abstract: An electric power steering apparatus in which a housing (3) is formed with a housing opening (38) through which bus bars (20) pass for electrically connecting the motor (1) and the control circuit unit (2) with each other. A casing is formed with a heat sink opening (46) through which the bus bars (20) pass, so that the motor (1) and the control circuit unit (2) are integrated with each other with the housing opening (38) and the heat sink opening (46) disposed to correspond to each other.

Abstract: The invention provides a electric motor which is capable of easily holding and fixing a winding terminal connector for holding and connecting each winding terminal of a stator winding and is superior in workability and resistance to vibration.

Abstract: A rotation angle detector includes a stator core (2) comprised of a plurality of core sheets (4) each having plural core members (4a) each including a tooth and a yoke portion (5a, . . . , 5h, 4b) disposed in a strip-like array with adjacent core members being coupled to one another by coupling means (4d) at yoke end portion. The core member is laminated. The stator core is shaped into an annular form by bending the core members at coupled portions so that the tooth portions extend centrally while capable of extending substantially linearly upon expansion thereof. An exciting winding (8) and output windings (9, 10) of n phases are wound on the tooth portions. A rotor core (3) is disposed rotatably relative to the stator core such that gap permeance between the rotor core and the tooth portions changes sinusoidally as a function of the rotation angle.

Abstract: A small-sized and inexpensive electric motor in which connection of a stator coil is easy, the connecting portion occupies a small space, and stable torque characteristics are obtained by making electric resistance uniform. A coil bobbin is mounted on a magnetic pole of a stator core, and a stator coil is fitted. A lead wire is led to an external diameter side of one end of the stator core. A connecting conductor holder with a common coil-connecting conductor, connecting conductors for each phase and a through hole is mounted on an end of a coil bobbin. The common coil-connecting conductor has connecting terminals projecting in radial directions, and the connecting conductors for each phase have such a cross-sectional area as to equalize electric resistance of each phase after connecting the stator coil. The through hole is formed to allow a bearing-housing portion to be inserted.

Abstract: Upper and lower insulators are mounted so as to electrically insulate a sensor core and a sensor coil, a connector is formed integrally with the upper insulator so as to be positioned on an outer circumferential side of a yoke of the sensor core, and lead wire portions of conductor wires constituting an excitation winding and an output winding of the sensor coil are joined to terminal pins on an upper surface of the upper insulator so as to have a predetermined amount of slack.

Abstract: An electric power steering apparatus in which a housing (3) is formed with a housing opening (38) through which bus bars (20) pass for electrically connecting the motor (1) and the control circuit unit (2) with each other. A casing is formed with a heat sink opening (46) through which the bus bars (20) pass, so that the motor (1) and the control circuit unit (2) are integrated with each other with the housing opening (38) and the heat sink opening (46) disposed to correspond to each other.

Abstract: A permanent magnet motor having a rotor with permanent magnets disposed on the outer circumferential face at a predetermined interval in a peripheral direction, and a stator with magnetic pole pieces arranged at a predetermined spacing in the peripheral direction, the magnetic pole pieces being opposed to the permanent magnets, the stator surrounding the rotor, wherein the auxiliary grooves are provided on a face of each magnetic pole piece of the stator opposed to the permanent magnets of the rotor, and a skew having an electric angle of 72° is provided relatively between the rotor and the stator.

Abstract: A motor for use with a motorized power steering apparatus is provided in which the number of component members can be reduced, and workability in assembling the component members can be improved, while enabling miniaturization of the entire motor. The motor includes a bottomed cylindrical frame 31, a bracket 32 fixedly secured to the frame 31, a rotating element 8 having a shaft 7 rotatably supported by a frame side bearing 110 fixedly mounted on the frame 31 and a bracket side bearing 100 fixedly mounted on the bracket 32, a stationary element 6 fixedly attached to the frame 31 around an outer periphery of the rotating element 8 and having a stator winding 18 wound therearound, a rotation sensor 15 provided on the bracket 32 at a housing side of the bracket side bearing 100, and a plurality of sensor signal wires 38 for supplying and receiving signals to and from the rotation sensor 15.

Abstract: A permanent magnet motor having a rotor with permanent magnets disposed on the outer circumferential face at a predetermined interval in a peripheral direction, and a stator with magnetic pole pieces arranged at a predetermined spacing in the peripheral direction, the magnetic pole pieces being opposed to the permanent magnets, the stator surrounding the rotor, wherein auxiliary grooves are provided on a face of each magnetic pole piece of the stator opposed to the permanent magnets of the rotor, and a skew having an electric angle of 72° is provided relatively between the rotor and the stator.

Abstract: The invention provides a small-sized and inexpensive electric motor in which connection of a stator coil is easily and connecting portion occupies a small space. Stable torque characteristic is obtained by making electric resistance values uniform.

Abstract: The invention provides a electric motor which is capable of easily holding and fixing a winding terminal connector for holding and connecting each winding terminal of a stator winding and is superior in workability and resistance to vibration.