Abstract: Provided is a spur gear component including a plurality of teeth protruding in a radial direction, extending in an axial direction, and arranged at equal pitches in a circumferential direction, the spur gear component including a fiber material having a shape corresponding to an arrangement pattern of the plurality of teeth and wound in a spiral shape around a center axis.

Abstract: Provided is a bevel gear component including a plurality of teeth protruding in an axial direction, extending toward an outer peripheral side, and arranged at equal pitches in a circumferential direction, the bevel gear component including a fiber material having a shape corresponding to an arrangement pattern of the plurality of teeth and wound around a center axis.

Abstract: A speed reducer includes a gear, a pinion gear, a movable portion holding the gear so as to be rotatable around a first axis, and a movable portion holding the pinion gear so as to be rotatable around a second axis non-parallel to the first axis. The gear has an annular power transmission portion surrounding the first axis on one side in a direction along the first axis. The pinion gear has a power transmission portion facing the power transmission portion and transmitting rotational torque on an outer periphery. The movable portion has a bearing portion holding the pinion gear inside the power transmission portion and a bearing portion holding the pinion gear outside the power transmission portion.

Abstract: This disclosure discloses a rotating electric machine including a rotor and a stator. The rotating electric machine includes a stator core including a teeth part, and an air core coil. The air core coil is fitted to the teeth part. The air core coil includes curved end surfaces configured to approximately define a part of cylindrical shape at inner radial side and outer radial side. The air core coil includes approximately flat end surfaces at both circumferential sides and both axial sides.

Abstract: This disclosure discloses a rotary electrical machine of a variable field type configured to change a field magnetic flux. The rotary electrical machine includes a stator including stator windings and a stator core, and a rotor including a shaft rotatably supported, a rotor core relatively rotatably mounted on the shaft, and a plurality of first permanent magnets disposed on the rotor core. The rotor core is configured to be held at a predetermined angular position with respect to the shaft with a magnetic suction force of the first permanent magnet, and to increase a relative angle with the shaft in response to an increase of a load torque against the magnetic suction force. The rotor core has an approximately same axial length as the stator core.

Abstract: A speed reducer includes a gear, a pinion gear, a movable portion holding the gear so as to be rotatable around a first axis, and a movable portion holding the pinion gear so as to be rotatable around a second axis non-parallel to the first axis. The gear has an annular power transmission portion surrounding the first axis on one side in a direction along the first axis. The pinion gear has a power transmission portion facing the power transmission portion and transmitting rotational torque on an outer periphery. The movable portion has a bearing portion holding the pinion gear inside the power transmission portion and a bearing portion holding the pinion gear outside the power transmission portion.

Abstract: This disclosure discloses a coil. An outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts. The coil includes at least one parallel part extended parallelly along the circumferential direction, and at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts.

Abstract: A rotating electrical machine includes a rotor and a stator positioned circumferentially around the rotor. The stator includes multiple core elements arrayed in a circumferential direction of the rotor such that the core elements form multiple slots arrayed in the circumferential direction, and a unitary cylindrical coil resin structure including molded resin and lap wound air-core coils resin-molded in the molded resin, each of the air-core coils having an air-core, a first side portion and a second side portion extending on the opposite sides of the air-core such that the first side portion extends through a first one of the slots and the second side portion extends through a second one of the slots.

Abstract: This disclosure discloses a rotating electric machine including a rotor and a stator. The rotating electric machine includes a stator core including a teeth part, and an air core coil. The air core coil is fitted to the teeth part. The air core coil includes curved end surfaces configured to approximately define a part of cylindrical shape at inner radial side and outer radial side. The air core coil includes approximately flat end surfaces at both circumferential sides and both axial sides.

Abstract: This disclosure discloses a rotary electrical machine of a variable field type configured to change a field magnetic flux. The rotary electrical machine includes a stator including stator windings and a stator core, and a rotor including a shaft rotatably supported, a rotor core relatively rotatably mounted on the shaft, and a plurality of first permanent magnets disposed on the rotor core. The rotor core is configured to be held at a predetermined angular position with respect to the shaft with a magnetic suction force of the first permanent magnet, and to increase a relative angle with the shaft in response to an increase of a load torque against the magnetic suction force. The rotor core has an approximately same axial length as the stator core.

Abstract: A permanent magnet rotating electrical machine includes a stator and a rotatable, approximately cylindrical rotor. The rotor includes a shaft, rotor cores, radial permanent magnets, and side plates. The shaft includes projected and depressed engagement portions. The rotor cores are separated from each other on a magnetic pole basis. The rotor cores constitute circumferentially arranged pole shoes. The radial permanent magnets are each on a circumferential side of a pole shoe among the pole shoes. Each of the radial permanent magnets is engaged with an engagement portion among the engagement portions of the shaft. The side plates are on axial ends of the rotor. The side plates support the rotor cores and the permanent magnets in a radial direction of the rotor.

Abstract: A motor system includes a motor and a circuit. The motor includes a mover and a stator. The mover includes mover side protrusions. The stator includes first and second stator side protrusions, and first and second coils respectively wound around the first and second stator side protrusions. When a center of one first stator side protrusion among the first stator side protrusions in a circumferential direction is aligned with a center of one mover side protrusion in the circumferential direction, a center of one second stator side protrusion among the second stator side protrusions in the circumferential direction is out of alignment with a center of another mover side protrusion in the circumferential direction. The circuit drives the motor, and includes first and second circuits to provide a current respectively through the first and second coils.

Abstract: This disclosure discloses a coil. An outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts. The coil includes at least one parallel part extended parallelly along the circumferential direction, and at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts.

Abstract: This disclosure discloses a rotating electric machine includes a rotor disposed rotatably, a stator including a plurality of stator windings, and a connector unit connecting ends of the plurality of stator windings. The connector unit includes a plurality of conductors, and a plurality of resin films each formed sterically to insulate the plurality of conductors from one another.

Abstract: A rotary electric machine according to an embodiment includes a substantially cylindrical rotator that is freely rotatably supported, a stator, and a bracket that supports the rotator and the stator. The stator includes stator coils in which a plurality of air-cored coils are arranged in a ring shape and are integrated by resin, each of the air-cored coils being formed by winding a round copper wire and having an outer shape subjected to pressure molding, and stator cores divided for each of teeth.

Abstract: A rotary electric machine includes: a stator having a stator winding and a stator core; a rotor having a first magnetic pole section and a second magnetic pole section, where the second magnetic pole section rotates respective to the first magnetic pole section; a shaft provided for the rotor; and a rotary mechanism configured to rotate the second magnetic pole section about the shaft. The rotary mechanism includes: a moving member configured to be movable along the shaft; a lead screw mechanism configured to move the moving member along the shaft; and a rotary member configured to rotate respective to the shaft along with the second magnetic pole section, where the rotary member engages the moving member and the second magnetic pole section.

Abstract: A rotary electric machine includes: a stator having a stator winding and a stator core; a rotor having a first magnetic pole section and a second magnetic pole section, where the second magnetic pole section rotates respective to the first magnetic pole section; a shaft provided for the rotor; and a rotary mechanism configured to rotate the second magnetic pole section about the shaft. The rotary mechanism includes: a moving member configured to be movable along the shaft; a lead screw mechanism configured to move the moving member along the shaft; and a rotary member configured to rotate respective to the shaft along with the second magnetic pole section, where the rotary member engages the moving member and the second magnetic pole section.

Abstract: A permanent magnet rotating electrical machine includes a stator and a rotatable, approximately cylindrical rotor. The rotor includes a shaft, rotor cores, radial permanent magnets, and side plates. The shaft includes projected and depressed engagement portions. The rotor cores are separated from each other on a magnetic pole basis. The rotor cores constitute circumferentially arranged pole shoes. The radial permanent magnets are each on a circumferential side of a pole shoe among the pole shoes. Each of the radial permanent magnets is engaged with an engagement portion among the engagement portions of the shaft. The side plates are on axial ends of the rotor. The side plates support the rotor cores and the permanent magnets in a radial direction of the rotor.

Abstract: A variable field magnet rotating electrical machine includes a stator, a rotor, and a rotary position detector. The stator includes a stator winding coil and a stator iron core. The rotor includes a field magnet, a first field magnetic pole portion, and a second field magnetic pole portion. The first field magnetic pole portion is configured to turn relative to the second field magnetic pole portion. The first and second field magnetic pole portions include signal generators each configured to generate a signal to detect a rotary position of a corresponding one of the first and second field magnetic pole portions. The rotary position detector is configured to detect a rotary position of the rotor.

Abstract: A rotary electric machine according to an embodiment includes a substantially cylindrical rotator that is freely rotatably supported, a stator, and a bracket that supports the rotator and the stator. The stator includes stator coils in which a plurality of air-cored coils are arranged in a ring shape and are integrated by resin, each of the air-cored coils being formed by winding a round copper wire and having an outer shape subjected to pressure molding, and stator cores divided for each of teeth.