Abstract: A compressor is configured to compress a fluid. The compressor includes a first casing and at least one first pipe. The first casing is electrically conductive. The at least one first pipe is electrically conductive. The at least one first pipe is fixed to the first casing with a first insulator interposed therebetween.

Abstract: A method for manufacturing a compressor includes fixing a stator core to an inside of a barrel via a resin member by shrink fit. An outer peripheral surface of the resin member is a first joining surface. A surface in contact with the first joining surface on an inner peripheral surface of the barrel is a second joining surface. The fixing the stator core to the inside of the barrel includes joining the first joining surface to the second joining surface. Upon joining, to the second joining surface, an intermediate portion of the first joining surface between a first end and a second end facing each other, spaces between the first joining surface and the second joining surface are formed between the first end and the intermediate portion and between the second end and the intermediate portion.

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 stator core of an electric motor includes a core body, a slot, and an insulating member. The insulating member is integrated with the core body and has a linear expansion coefficient different from the core body. The insulating member includes, at a peripheral wall portion, a plurality of contact portions extending throughout a cylinder axial direction of the stator core and being in contact with the peripheral wall portion, and a noncontact portion positioned between adjacent ones of the contact portions. The noncontact portion extends throughout the cylinder axial direction and is not in contact with the peripheral wall portion. The peripheral wall portion has an inner peripheral wall portion forming a peripheral wall of the slot, and an outer peripheral wall portion forming an outer peripheral wall of the core body. The insulating member is located at at least one of the inner and outer peripheral wall portions.

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 stator includes a stator core having a substantially cylindrical back yoke and a plurality of teeth extending radially inward from the back yoke. The stator core includes a plurality of stator core pieces each having one tooth and a yoke piece forming part of the back yoke. On an inside of the back yoke in a radial direction, adjacent ones of the stator core pieces directly contacting each other or indirectly contacting each other with a member, as an intervening part, interposed between the adjacent ones of the stator core pieces.

Abstract: A compressor is configured to compress a fluid. The compressor includes a first casing and at least one first pipe. The first casing is electrically conductive. The at least one first pipe is electrically conductive. The at least one first pipe is fixed to the first casing with a first insulator interposed therebetween.

Abstract: Techniques to reduce the d-axis inductance in a rotor are provided. According to one embodiment in the present disclosure, a rotor 20 includes permanent magnets 22 and 23 housed in magnet slots different from each other formed in an iron core 21, and arranged in series magnetically; and a flux barrier (cavity 24) provided to be close to an end in a direction orthogonal to a direction of a main magnetic flux, for each of the permanent magnets 22 and 23 arranged in series magnetically. Two instances of the flux barrier corresponding to the respective permanent magnets 22 and 23 arranged in series magnetically, communicate with each other. According to another embodiment in the present disclosure, a motor 1 includes the rotor 20 described above.

Abstract: A rotating electric machine includes a plurality of iron cores, arid a plurality of supporting members. At least one of the iron cores is supported by one of the supporting members via a resin member. At least one of the iron core and the supporting member supporting the iron core via the resin member has an elastic deformation portion configured to press the resin member against an other one of the iron core and the supporting member supporting the iron core. A method of manufacturing a rotating electric machine includes forming a resin member on an elastic deformation portion by injection molding, and fixing an iron core and a supporting member to each other while elastically deforming the elastic deformation portion.

Abstract: A stator includes a stator core in which an annular back yoke is integrated with a plurality of teeth circumferentially arranged on the back yoke at intervals, and an insulator that sandwiches the stator core from axial sides of the stator core. The insulator is molded integrally with the stator core using resin molding such that the insulator covers an inner surface of a slot portion of the stator core. A motor includes a rotor and the stator radially facing the rotor. A compressor includes a hermetic container, a compression mechanism disposed in the hermetic container, the motor disposed in the hermetic container to drive the compression mechanism.

Abstract: A compressor includes a motor, a compression mechanism driven by the motor to compress a refrigerant, a casing housing the motor and the compression mechanism, at least one fastening member configured to fasten a stator of the motor to a predetermined support member, and an insulating member having electrically insulating properties. The motor is exposed to the refrigerant in the casing. The stator has a fixing portion usable to fix the stator to the support member. The fixing portion is integral with the stator or separate from the stator. At least one through hole is formed in the fixing portion. The insulating member is provided between the fastening member and a wall surface of the through hole. The insulating member has a permittivity lower than a permittivity of the refrigerant.

Abstract: A stator includes a stator core in which an annular back yoke is integrated with a plurality of teeth circumferentially arranged on the back yoke at intervals, and an insulator that sandwiches the stator core from axial sides of the stator core. The insulator is molded integrally with the stator core using resin molding such that the insulator covers an inner surface of a slot portion of the stator core. A motor includes a rotor and the stator radially facing the rotor. A compressor includes a hermetic container, a compression mechanism disposed in the hermetic container, the motor disposed in the hermetic container to drive the compression mechanism.

Abstract: A stator core of an electric motor includes a core body, a slot, and an insulating member. The insulating member is integrated with the core body and has a linear expansion coefficient different from the core body. The insulating member includes, at a peripheral wall portion, a plurality of contact portions extending throughout a cylinder axial direction of the stator core and being in contact with the peripheral wall portion, and a noncontact portion positioned between adjacent ones of the contact portions. The noncontact portion extends throughout the cylinder axial direction and is not in contact with the peripheral wall portion. The peripheral wall portion has an inner peripheral wall portion forming a peripheral wall of the slot, and an outer peripheral wall portion forming an outer peripheral wall of the core body. The insulating member is located at at least one of the inner and outer peripheral wall portions.