Abstract: A motor 1 according to one embodiment of the present disclosure includes a rotor 10 configured to freely rotate around a rotary shaft member 13; a stator 20, 320 including a stator unit 21 of a claw-pole type, the stator unit including a winding wire 212 that is annularly wound around the rotary shaft member 13 and a stator core 211 provided so as to surround the winding wire 212, the stator core 211 having a through hole piercing the stator core 211 around the rotary shaft member 13; and a first bearing holder 24B provided at one end side of the stator 20 in an axial direction of the rotary shaft member 13 and configured to hold a first bearing 25 rotatably supporting the rotary shaft member 13, wherein the first bearing 25 and the first bearing holder 24B are arranged on an outside in the axial direction with respect to the stator core 211, and an outer diameter of the first bearing 25 or the first bearing holder 24B is larger than an inner diameter of the through hole of the rotary shaft member 13.

Abstract: A motor 1 according to an embodiment of the present disclosure includes a rotor 10 configured to freely rotate around a rotation axis AX; and a stator 20 arranged inside the rotor 10 and including a stator unit 21 of a claw-pole type, the stator unit including a winding wire 212 that is annularly wound around the rotation axis AX and a stator core 211 provided so as to surround the winding wire, wherein the stator 20 includes an inner space 24A around the rotation axis AX and in communication with an outer side of the rotor 10, such that heat can be radiated to the inner space 24A.

Abstract: An image processing device includes: a communicator that executes external communication via a communication path; a hardware processor that detects a threat in the image processing device, and cuts off the communication by the communicator upon detecting the threat; a transmitter that executes communication, after the hardware processor detects the threat, to transmit a notification that the threat has been detected to a defined destination via another communication path; and a receiver that executes communication to receive communication restoration trigger information via another communication path. Once the receiver receives the communication restoration trigger information, the hardware processor executes a communication control to restore the communication by the communicator.

Abstract: An electric motor system includes a drive shaft, a first electric motor, a second electric motor, a first inverter, a second inverter and a control unit. The drive shaft is rotatable around an axis. The first electric motor and the second electric motor rotate the drive shaft. The first inverter supplies power in order to generate a torque to the first electric motor. The second inverter supplies power in order to generate a torque to the second electric motor. The control unit controls the first inverter and the second inverter. The controller is configured to be able to change a ratio between an output torque of the first electric motor and an output torque of the second electric motor.

Abstract: A magnetic refrigerator includes a magnetic working substance, and a magnetic field application unit that causes a relative movement with respect to the magnetic working substance in a first direction and applies a magnetic field to the magnetic working substance. The magnetic field application unit includes magnetic poles arranged on one side of the magnetic working substance in a second direction orthogonal to the first direction, and spaced from each other in a third direction orthogonal to the first and second directions of the magnetic working substance. A refrigeration apparatus includes the magnetic refrigerator and a heating medium circuit to exchange heat with the magnetic refrigerator.

Abstract: A magnetic refrigerator includes a plurality of magnetic working substances arranged at predetermined first intervals in a first direction, and a magnetic field application unit that causes a relative movement with respect to the magnetic working substances in the first direction, and applies a magnetic field to the magnetic working substances. The magnetic field application unit includes one magnetic field generator, a first core provided closer to one magnetic pole of the magnetic field generator, and a second core provided closer to an other magnetic pole of the magnetic field generator. Three or more magnetic gaps are provided between the first core and the second core, and arranged at second intervals that are twice or more the first intervals in the first direction. A refrigeration apparatus includes the magnetic refrigerator and a heating medium circuit to exchange heat with the magnetic refrigerator.

Abstract: A rotary machine unit includes a casing having a tubular barrel, a stator core fixed to an inner peripheral surface of the tubular barrel, and a first member provided between the inner peripheral surface of the tubular barrel and an outer peripheral surface of the stator core. A shape of the inner peripheral surface of the tubular barrel is a non-perfect circular shape as viewed in a cylinder axis direction of the tubular barrel. The first member is made of a material having a lower Young's modulus than a material forming the tubular barrel and a material forming the stator core.

Abstract: A compressor has: a motor that has a stator provided around an axis of a rotor; a rotating shaft that is fixed to the rotor; a bearing that supports the rotating shaft; an impeller that is connected to the rotating shaft and compresses fluid; and a casing that accommodates the motor. In this compressor, the stator has: a coil that encircles the axis of the rotor; and a stator core that has a magnetic pole facing, in a radial direction of the rotor, an outer circumferential surface of the rotor, via a gap.

Abstract: A core includes a laminated body. The laminated body includes a plurality of electrical steel sheets stacked one on another. The laminated body includes a contact area between a pair of adjacent electrical steel sheets of the plurality of electrical steel sheets. The contact area includes a first friction area and a second friction area with friction coefficients different from each other.

Abstract: A motor apparatus includes a casing, a stator disposed in the casing, a rotor disposed on an inner circumference of the stator, a shaft disposed on an inner circumference of the rotor, a functional part disposed on an outer circumference of a first member, and a heat-resistant part disposed between the functional part and a second member. The first member is the stator or the shaft. The second member is the casing or the rotor.

Abstract: A motor includes a rotor and stator. The stator includes a stator iron core having a substantially annular yoke, and a plurality of teeth extending from the yoke toward the rotor. Each tooth includes an extending portion with a winding wire wound in a concentrated manner to form a coil, and flange portions extending circumferentially from a tip end portion of the extending portion. The plurality of teeth include adjacent first second teeth with coils having identical phases, and adjacent third and fourth teeth with coils having different phases. A first magnetic resistance circumferentially from a tip end portion of the first flange portion to a center of the extending portion of the first tooth is higher than a second magnetic resistance circumferentially from a tip end portion of the second flange portion to a center of the extending portion of the third tooth.

Abstract: An electric motor includes: a rotor configured to be rotatable about a rotation axis and to which a fluid drive unit is fixed; a stator that is disposed inward of the rotor and includes claw pole stator units, the claw pole stator units each including a winding that is wound in an annular shape around the rotation axis and an iron core that surrounds the winding; a hole that is provided in one end portion of the rotor so as to penetrate from inside to outside of the rotor, the stator being provided in the inside and the fluid drive unit being fixed to the outside of the rotor; and an inflow path configured to cause a surrounding fluid to flow into inside of a stator unit, the stator unit being provided at one other end portion opposite to the one end portion in an axial direction.

Abstract: A technique by which the magnetic flux of the magnetic pole facing the stator of the magnet can be further increased in a rotor, is provided.

Abstract: A rotary electrical device includes a rotor configured to be rotatable; and a stator disposed in a radial direction of the rotor to surround a rotation axis of the rotor. The stator includes a plurality of stator units that are stacked in an axial direction of the rotor. Each of the stator units includes a winding, a stator core that surrounds the winding, and one or more claw magnetic poles that protrude radially toward the rotor from each of two end portions in an axial direction of the stator core. The rotor includes a magnet that radially faces at least a portion of any of claw magnetic poles of the stator at a predetermined rotation position. At least one of magnet end portions in an axial direction of the magnet protrudes further in the axial direction than all of the claw magnetic poles of the stator.

Abstract: A motor includes a stator having stacking coil units with a nonmagnetic body arranged between, and a rotatable rotor. Each of the coil units includes a coil, and a stator core. The coil includes an annular winding. The stator core is arranged to surround at least part of the winding. The stator core includes projections formed on axial ends of the stator core, alternately arranged in a circumferential direction, and projecting radially toward the rotor from the axial ends. The coil includes the winding and two leads extending from the winding. At least one of a first and a second of the two leads extends between stator cores of two of the coil units. A magnet pole is arranged in one of inner and outer circumferential portions of the stator core, and the first and second leads are arranged in an other one of inner and outer circumferential portions.

Abstract: A technique that improves cooling performance of a motor including an iron core formed of a powder magnetic core is provided. A motor 1 according to one embodiment of the present disclosure includes a stator iron core 211 formed of a powder magnetic core and an inserting member 24 disposed so as to face at least a portion of a wall surface of the stator iron core 211, the inserting member being configured to enable heat to be transferred in an axial direction. The motor 1 Includes a heat dissipation member 40 configured to enable the heat from the inserting member 24 to be transferred in the axial direction. The motor 1 includes a fixing member 30 that fixes the iron core 211 and the inserting member 24. Stress generated between the stator iron core 211 and the inserting member 24 is less than each of stress generated between the stator iron core 211 and the fixing member 30, and stress generated between the inserting member 24 and the fixing member 30.

Abstract: A stator includes stator iron cores stacked in a rotor axial direction, and an interphase insulating member arranged between the stator iron cores. Each of the stator iron cores includes a circular back yoke and a stator claw magnetic pole that protrudes from the back yoke in a rotor radial direction. The interphase insulating member includes an insulating portion, arranged between adjacent ones of the stator iron cores, and a support. The stator claw magnetic pole is in contact with the support in at least one of a rotor circumferential direction and the rotor radial direction.

Abstract: A motor includes a stator, a rotor rotatable relative to the stator, and a fixing member. The fixing member includes first and second end plates, and at least one rod shaped portion. At least one of the stator and rotor includes an iron core formed by a powder magnetic core. The iron core includes a through hole extending through the iron core in an axial direction of the rotor. The first and second end plates are arranged to directly or indirectly contact end surfaces of the iron core in the axial direction. The rod shaped portion is fixed to the first and second end plates in a state in which the rod shaped portion is inserted in the through hole of the iron core, and the iron core is sandwiched by the first and second end plates in the axial direction of the rotor.

Abstract: A machine learning device learns a control condition for a magnetic bearing device that includes a magnetic bearing having a plurality of electromagnets that apply an electromagnetic force to a shaft. The machine learning device includes a learning unit, a state variable acquisition unit, an evaluation data acquisition unit, and an updating unit. The state variable acquisition unit acquires a state variable including at least one parameter correlating with a position of the shaft. The evaluation data acquisition unit acquires evaluation data including at least one parameter selected from a measured value of the position of the shaft, a target value of the position of the shaft, and a parameter correlating with a deviation from the target value. The updating unit updates a learning state of the learning unit by using the evaluation data. The learning unit learns the control condition in accordance with an output of the updating unit.

Abstract: An electric motor system includes a drive shaft, a first electric motor, a second electric motor, a first inverter, a second inverter and a control unit. The drive shaft is rotatable around an axis. The first electric motor and the second electric motor rotate the drive shaft. The first inverter supplies power in order to generate a torque to the first electric motor. The second inverter supplies power in order to generate a torque to the second electric motor. The control unit controls the first inverter and the second inverter. The controller is configured to be able to change a ratio between an output torque of the first electric motor and an output torque of the second electric motor.