Abstract: [Object] To provide a permanent magnet electric motor that can be downsized in a rotation axis direction and can also suppress a leakage flux. [Solving Means] The permanent magnet electric motor includes: a columnar rotor including a permanent magnet portion annularly disposed; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a main body including a shell integrally formed with the stator core; a bracket attached to one end side of the main body; and a bearing that rotatably supports the shaft. The bracket includes a bearing house portion that stores the bearing, and a non-magnetic portion that is connected to the bearing house portion. The bearing house portion is disposed on an inner diameter side relative to the permanent magnet portion as viewed from an axis direction of the rotation axis, and an edge portion of the bearing house portion on an outer diameter side is covered with the non-magnetic portion.

Abstract: [Object] To provide an electric motor that can be downsized in a rotation axis direction and can also suppress the deformation of a bearing and a bearing house portion along with the deformation of a resin shell. [Solving Means] An electric motor according to an aspect of the present invention includes: a columnar rotor; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a resin shell that covers the stator core; a bearing that rotatably supports the shaft; and a bearing house portion that stores the bearing. The resin shell includes an annular portion integral with the stator core, and an end surface portion connected to an end portion of the annular portion and expanding from the annular portion to an inner circumferential side. The end surface portion includes a connection portion to be connected to the bearing house portion.

Abstract: A cooling device is capable of protecting an electronically controlled expansion valve in a main refrigerant circuit from the liquid hammer phenomenon due to high-pressure liquid refrigerant when cooling operation starts. The cooling device includes a main refrigerant circuit, a defrosting refrigerant circuit, and a controller. In the main refrigerant circuit, a compressor, a condenser, a main opening-closing valve, an expansion valve in which the flow rate of refrigerant is variable, and an evaporator are connected via refrigerant pipes. The defrosting refrigerant circuit connects the refrigerant outlet side of the compressor in the main refrigerant circuit and the refrigerant inlet side of the evaporator in the main refrigerant circuit to each other and includes a valve mechanism.

Abstract: A cooling device is capable of protecting an electronically controlled expansion valve in a main refrigerant circuit from the liquid hammer phenomenon due to high-pressure liquid refrigerant when cooling operation starts. The cooling device includes a main refrigerant circuit, a defrosting refrigerant circuit, and a controller. In the main refrigerant circuit, a compressor, a condenser, a main opening-closing valve, an expansion valve in which the flow rate of refrigerant is variable, and an evaporator are connected via refrigerant pipes. The defrosting refrigerant circuit connects the refrigerant outlet side of the compressor in the main refrigerant circuit and the refrigerant inlet side of the evaporator in the main refrigerant circuit to each other and includes a valve mechanism.

Abstract: Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface (231) is provided on the lateral surface in one circumferential direction of a yoke strip (23), and a second contact surface (232) is provided on the lateral surface in the other circumferential direction of the yoke strip (23), wherein the first contact surface (231) and the second contact surface (232) are aligned with each other. Defining As1 and As2 as the surface areas (As) of the first and second contact surfaces (231, 232), and Ap1 and Ap2 as the projected surface areas (Ap) of the lateral surfaces of the aforementioned yoke strip seen from the circumferential direction, it holds that As>Ap.

Abstract: Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface (231) is provided on the lateral surface in one circumferential direction of a yoke strip (23), and a second contact surface (232) is provided on the lateral surface in the other circumferential direction of the yoke strip (23), wherein the first contact surface (231) and the second contact surface (232) are aligned with each other. Defining As1 and As2 as the surface areas (As) of the first and second contact surfaces (231, 232), and Ap1 and Ap2 as the projected surface areas (Ap) of the lateral surfaces of the aforementioned yoke strip seen from the circumferential direction, it holds that As>Ap.

Abstract: In a method for manufacturing an axial air-gap electronic motor, a plurality of core member and a plurality of dummy members are prepared, wherein each of the dummy members has a shape same as that of the core members. Then, the plurality of core members is arranged such that teeth surfaces of the core members face each other, and the dummy member is arranged between predetermined core members. Thereafter, a coil is wound from one end side toward the other end side of the core members through the dummy member continuously without cutting. A part of the coil corresponding to a transition wire set between the core members is wound on the dummy member.

Abstract: There is provided a method for manufacturing a stator core for an axial air-gap electronic motor, in which core sheets are laminatedly fixed while being shifted with predetermined intervals. The method includes a step in which first side surfaces in the circumferential direction (first slot surfaces 25) of the first to nth (n is a positive integer) core sheets are blanked out of a mother sheet 60 by moving first blanking punches 360 with predetermined intervals via a first control means 700; and a second blanking step in which second side surfaces in the circumferential direction (second slot surfaces 26) of the first to nth (n is a positive integer) core sheets are blanked in succession by moving a second blanking punch 460 with predetermined intervals via a second control means 700.

Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.

Abstract: In an axial air-gap electronic motor in which a stator is formed by a plurality of core members, the manpower for assembling the core member is reduced, and the motor is assembled in a shorter period of time. A hook portion 320, which is a first connecting means, is projectingly provided at one end in the circumferential direction of a flange portion 310 of each of the core members 21a to 21i, and a columnar locking shaft 330 to which the hook portion 320 is locked is provided at the other end in the circumferential direction of the flange portion 310, by which the core members 21a to 21i are connected to each other.

Abstract: An axial air-gap electronic motor is arranged such that a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly with a predetermined gap therebetween along an axis line direction of an output shaft of the rotor. The rotor has a rotor back yoke arranged coaxially with the stator, and a rotor magnet installed to the rotor back yoke so as to face the teeth surface of the stator. The rotor magnet is provided with an anchor magnet which is integral with the rotor magnet and is arranged on a back surface side of the rotor back yoke.

Abstract: A gap surface (225) on which a circuit board (5) for driving control is mounted is provided between a first inner surface (222) and a second inner surface (223), a tip end of a terminal pin (6) is projected in a part of the gap surface (225), and further a first concave portion (228) formed by recessing surroundings of the terminal pin (6) in an axis line direction of the terminal pin is provided in the gap surface (225). Thus, an electric motor can be assembled in a short period of time.

Abstract: In an axial air-gap electronic motor having a stator that is formed by annularly connecting a plurality of core members around an axis of a rotor output axis, an insulator that insulates a winding portion of a stator core of each core member is formed in the winding portion in the shape of a bobbin having a pair of flanges, a winding draw-out portion is formed between abutted end portions of the flange, and a crossover wire of a winding is pulled out from the winding draw-out portion to outside the core member, whereby it is possible to positively perform routing treatment from the winding portion of the winding to the crossover wire and it is ensured that the crossover wire can be positively fixed without bringing a crossover wire of a different phase into contact.

Abstract: An axial air-gap electronic motor has a teeth surface of a stator and a magnet surface of a rotor arranged opposedly along an axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween. The stator has a plurality of core members connected in a ring form. In manufacturing the electronic motor, after the teeth surfaces of the core members are arranged so as to face to each other and a dummy member is arranged between predetermined core members, a coil is wound from one end side toward the other end side of the core members continuously without being cut, and a coil of a length corresponding to a transition wire set between the core members is wound on the dummy member.

Abstract: A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnets 8b, 9b arranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap L1 of a stator 2 and a permanent magnet 8b1, and an air gap L2 of the stator 2 and a permanent magnet 9b1. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnet 8b1 and a permanent magnet 9b2 arranged in the respective rotors.

Abstract: In an axial air-gap electronic motor in which a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly along the axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween, the stator has a plurality of core members connected in a ring form with the axis line being a center, and each of the core members is provided with a connecting device for connecting the teeth surfaces to each other in an opposed state. In order to shorten the wire winding time and reduce the assembling manpower for the core members, a stator is formed by connecting a plurality of core members in a ring form with the axis line being a center, and locking ribs are provided as connecting devices for connecting the core members to each other in a rod form along the axis line direction.

Abstract: An axial air gap type electric motor is constructed such that even if a relatively large force is added in the vertical direction to the rotor output, the bearings are protected against damage. The axial air gap type electric motor includes a stator and two rotors each of which is configured almost with a discoid shape and which are arranged as facing one another on a common rotation axle with a fixed gap being present therebetween. The stator has a stator core comprising multiple pole members connected annularly. One of the bearings for fixing the rotor output axle is installed inside the stator configured annularly and another bearing is installed on the rotor output axle between the outside of said rotor and the load connected.

Abstract: An axial air gap type electric motor realizes a torque up without an increase of the size of the electric motor. In the axial air gap type electric motor including a stator and two rotors each of which is molded almost with a discoid shape and which are arranged as facing one another on a common rotation axle with a fixed gap therebetween, the stator has a stator core including 3n (n indicates an integer of 2 or higher) pole members, and the pole members with three-phase configuration are connected in parallel. The rotors are formed with multiple magnets molded like a ring at an equal interval at positions facing the annular stator core when facing the stator, and the ratio of the number of the pole members and the number of the magnets becomes 3n:4n (wherein n indicates an integer of 2 or higher).

Abstract: In an axial air-gap electronic motor having a stator that is formed by annularly connecting a plurality of core members around an axis of a rotor output axis, an insulator that insulates a winding portion of a stator core of each core member is formed in the winding portion in the shape of a bobbin having a pair of flanges, a winding draw-out portion is formed between abutted end portions of the flange, and a crossover wire of a winding is pulled out from the winding draw-out portion to outside the core member, whereby it is possible to positively perform routing treatment from the winding portion of the winding to the crossover wire and it is ensured that the crossover wire can be positively fixed without bringing a crossover wire of a different phase into contact.

Abstract: There is provided an axial air-gap electronic motor in which work for assembling a stator can be performed efficiently. A locking protrusion 26 is provided on a flange portion 24 of core members 21a to 21i which are divided for each teeth 21 and are arranged in a ring form with the rotating shaft axis line being the center, and a connecting member 8 is fitted on the locking protrusion 26, by which the core members 21a to 21i are connected to each other in a ring form.