WO2017104013A1 - 固定子、固定子の製造方法、電動機および空気調和装置 - Google Patents
固定子、固定子の製造方法、電動機および空気調和装置 Download PDFInfo
- Publication number
- WO2017104013A1 WO2017104013A1 PCT/JP2015/085159 JP2015085159W WO2017104013A1 WO 2017104013 A1 WO2017104013 A1 WO 2017104013A1 JP 2015085159 W JP2015085159 W JP 2015085159W WO 2017104013 A1 WO2017104013 A1 WO 2017104013A1
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- WIPO (PCT)
- Prior art keywords
- resin
- stator
- mold
- winding portion
- coil
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/525—Annular coils, e.g. for cores of the claw-pole type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
- F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
- H02K15/105—Applying solid insulation to windings, stators or rotors to the windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
Definitions
- the present invention relates to a stator used for an electric motor, a manufacturing method thereof, an electric motor, and an air conditioner using the electric motor.
- the stator of the mold motor is manufactured by winding a coil around the stator core and integrally molding with a mold resin. In recent years, in order to reduce manufacturing costs, it has been required to reduce the amount of mold resin used.
- JP 2000-166195 A Japanese Patent Laid-Open No. 10-271720 (see paragraph 0028)
- the present invention has been made to solve the above-described problems, and aims to reduce the amount of mold resin used.
- the stator according to the present invention includes a stator core having first and second teeth adjacent to each other, a first winding portion wound around the first teeth, and a winding wound around the second teeth.
- the electric motor of the present invention includes a stator and a rotor disposed inside the stator.
- the stator includes a stator core having a first tooth and a second tooth adjacent to each other, a first winding portion wound around the first tooth, and a first winding wound around the second tooth.
- a coil having two winding portions, a resin piece disposed in a gap between the first winding portion and the second winding portion, and a mold resin that covers the stator core, the coil, and the resin piece.
- An air conditioner includes an outdoor unit including a first fan and a first electric motor that drives the first fan, a second fan, and a second electric motor that drives the second fan. And a refrigerant pipe that connects the outdoor unit and the indoor unit.
- At least one of the first electric motor and the second electric motor includes a stator and a rotor disposed inside the stator.
- the stator includes a stator core having a first tooth and a second tooth adjacent to each other, a first winding portion wound around the first tooth, and a first winding wound around the second tooth.
- a coil having two winding portions, a resin piece disposed in a gap between the first winding portion and the second winding portion, and a mold resin that covers the stator core, the coil, and the resin piece. .
- the method for manufacturing a stator according to the present invention includes a step of preparing a stator iron core having first and second teeth adjacent to each other, and a first winding of a coil on the first teeth and the second teeth. A step of winding the wire portion and the second winding portion, a step of supplying a resin piece into the gap between the first winding portion and the second winding portion, a stator core, a coil and a resin piece, A molding step of integrally molding with a molding resin.
- the resin piece is disposed in the gap between the first winding portion and the second winding portion of the coil, it is possible to further reduce the amount of mold resin used, thereby reducing the manufacturing cost. Can be further reduced.
- FIG. 3 is a plan view showing the configuration of the stator core according to the first embodiment.
- FIG. 3 is a perspective view illustrating a configuration of a lead wire wiring component according to the first embodiment. It is the perspective view which looked at the cyclic
- FIG. 3 is a perspective view illustrating a configuration of a lead portion of the lead wire wiring component according to the first embodiment.
- FIG. 3 is a perspective view showing a configuration of a power supply lead wire holding component according to Embodiment 1.
- FIG. 2 is a perspective view showing a configuration of a sensor lead wire holding component according to Embodiment 1.
- FIG. 3 is a perspective view showing a stator according to the first embodiment.
- FIG. 3 is a partial cross-sectional view showing a configuration of an electric motor including the stator according to the first embodiment. It is a figure which shows the structural example of the air conditioning apparatus provided with the electric motor of Embodiment 1.
- FIG. 5 is a flowchart for illustrating a manufacturing process of the stator according to the first embodiment.
- Embodiment 1 it is a perspective view for demonstrating the process of supplying the resin end material (resin piece) to a stator assembly.
- FIG. 3 is a schematic diagram illustrating a basic configuration of a mold according to the first embodiment.
- Embodiment 2 of this invention it is a perspective view for demonstrating the process of supplying the resin end material to a stator assembly.
- FIG. 1 is a perspective view showing a configuration of a stator assembly 10 according to Embodiment 1 of the present invention.
- the stator assembly 10 constitutes a stator 1 (FIG. 9) of an electric motor 100 (FIG. 10) described later.
- the stator assembly 10 is wound around the stator core 2 via the stator core 2, an insulating portion (insulator) 11 provided on the stator core 2, and the insulating portion 11. And a coil 12.
- FIG. 2 is a plan view showing the configuration of the stator core 2.
- the stator core 2 is configured in a ring shape as a whole.
- the stator core 2 includes a yoke 21 that forms an outer peripheral portion, and a plurality of teeth 22 that extend radially inward from the yoke 21.
- a slot is formed between adjacent teeth 22.
- nine teeth 22 are arranged at equal intervals in the circumferential direction of the stator core 2, but the number of teeth 22 is not particularly limited.
- arbitrary two teeth 22 adjacent in the circumferential direction among the plurality of teeth 22 of the stator core 2 are referred to as a first tooth 221 and a second tooth 222.
- the direction of the central axis of the annular stator core 2 is referred to as the axial direction of the stator core 2 (or the axial direction of the stator assembly 10).
- a direction along the outer periphery (circumference) of the stator core 2 is referred to as a circumferential direction of the stator core 2 (or a circumferential direction of the stator assembly 10).
- the teeth 22 have an inner peripheral end 22 a on the side opposite to the yoke 21.
- the teeth 22 have a coil holding surface 22b around which the coil 12 (FIG. 1) is wound.
- the stator core 2 is covered with an insulating portion 11 (FIG. 1) except for the inner peripheral end 22 a of the teeth 22 and the outer peripheral surface of the yoke 21.
- the insulating core 11 insulates the stator core 2 and the coil 12 from each other.
- the stator core 2 is formed by laminating a plurality of electromagnetic steel sheets punched into strips and fixing them together by caulking, welding or adhesion.
- the stator core 2 has a configuration divided into a plurality of blocks of the same number (here, nine) as the teeth 22.
- the stator core 2 constitutes a strip-shaped connecting body in which nine blocks are connected in a row before being assembled in a ring shape.
- the insulating part 11 is integrally formed or assembled on the band-shaped connecting body, the coil 12 (magnet wire) is wound around each tooth 22, and then the ends of the band-shaped connecting body are welded to each other in FIG.
- the annular stator core 2 shown is formed.
- the stator core 2 is not limited to the one having the configuration divided into a plurality of blocks.
- the insulating portion 11 is formed by integrally molding a thermoplastic resin such as PBT (polybutylene terephthalate) with the stator core 2 or assembling a preformed thermoplastic resin molded body to the stator core 2. Is formed.
- a thermoplastic resin such as PBT (polybutylene terephthalate)
- the insulating portion 11 includes a portion that covers the coil holding surface 22b (FIG. 2) of the tooth 22, an outer wall portion 11a that supports the coil 12 so as not to fall toward the outer peripheral side, and an inner wall that supports the coil 12 so as not to fall toward the inner peripheral side. Part 11b.
- the outer wall portion 11a and the inner wall portion 11b of the insulating portion 11 are formed so as to protrude from the coil 12 on both axial sides of the stator assembly 10 (upper and lower sides in FIG. 1).
- the coil 12 is formed by, for example, winding a magnet wire around the teeth 22.
- a winding portion 12a Each portion of the coil 12 wound around each tooth 22 is referred to as a winding portion 12a.
- the winding portion 12a wound around the first tooth 221 shown in FIG. 2 is referred to as a first winding portion 121
- the winding portion 12a wound around the second tooth 222 is referred to as a second winding portion 12a. This is referred to as a winding part 122.
- the coil 12 is a three-phase winding.
- Three power supply terminals 23 and two neutral point terminals 24 and 25 to which the coils 12 of each phase (U phase, V phase, and W phase) are connected are attached to the outer wall portion 11a of the insulating portion 11.
- the coils 12 of each phase are joined to the respective power supply terminals 23 and neutral point terminals 24 and 25 by fusing (heat caulking) or solder, respectively.
- fusing heat caulking
- solder solder
- connection side the side (upper side in FIG. 1) on which the power supply terminal 23 and the neutral point terminal 24 are provided is referred to as a connection side, and the opposite side (lower side in FIG. 1) is anti-connection. Called the side.
- a plurality (four in this case) of pins 26 for fixing the lead wire wiring component 3 are formed on the outer wall portion 11a of the insulating portion 11 so as to protrude.
- a plurality of protrusions 11c for positioning the stator assembly 10 with respect to a mold die to be described later are provided at the end of the inner wall portion 11b on the anti-connection side.
- FIG. 3 is a perspective view of the lead wire wiring component 3 as viewed from the side opposite to the stator assembly 10.
- a power supply lead wire 14 and a sensor lead wire 15 are attached to the lead wire wiring component 3.
- three power supply lead wires 14 and five sensor lead wires 15 are bundled together to form a lead wire group 16.
- a board-in connector 17 is attached to the tip of the sensor lead wire 15 (end on the lead wire wiring component 3 side).
- the lead wire wiring component 3 is formed of a thermoplastic resin such as PBT and has an annular plate portion 30 attached to the stator assembly 10.
- the annular plate portion 30 has a plurality (four in this case) of leg portions 31 that come into contact with the upper surface of the outer wall portion 11 a (FIG. 1) when the lead wire wiring component 3 is attached to the stator assembly 10.
- the leg portion 31 is formed so as to protrude further outward in the radial direction from the outer peripheral portion of the annular plate portion 30. Holes 32 that engage with the pins 26 (FIG. 1) of the stator assembly 10 are formed in the leg portions 31.
- the position of the lead wire wiring component 3 in the axial direction with respect to the stator assembly 10 is determined by the leg portion 31 coming into contact with the upper surface of the outer wall portion 11a. Further, when the pin 26 of the stator assembly 10 is engaged with the hole 32 of the leg portion 31, the circumferential position of the lead wire wiring component 3 is determined.
- FIG. 4 is a perspective view of the annular plate portion 30 viewed from the side opposite to the stator assembly 10.
- FIG. 5 is a perspective view of the annular plate portion 30 as viewed from the stator assembly 10 side.
- the annular plate portion 30 is a plate-like member formed in an annular shape, and has a plurality of openings 30a over the entire area in the circumferential direction.
- a resin end member 8 (resin piece) to be described later can be supplied to the stator assembly 10 through the opening 30a.
- An opening portion 40 is provided at one place in the circumferential direction of the annular plate portion 30 so as to protrude outward in the radial direction of the annular plate portion 30.
- An inner peripheral wall 33 for routing the power supply lead wire 14 is provided along the inner peripheral edge of the annular plate portion 30.
- Misalignment prevention pins 33a (FIG. 5) for preventing misalignment of the power supply lead wire 14 are formed at a plurality of locations on the inner peripheral wall 33.
- a covering terminal holding portion 34 for holding the terminal portion of the power supply lead wire 14 is provided at a plurality of locations (here, three locations) corresponding to the number of the power supply lead wires 14. Moreover, the core wire holding part 35 is arrange
- the terminal portion of the power supply lead wire 14 (FIG. 3) is held by the covered terminal holding portion 34, and the core wire from which the coating is peeled is held by the core wire holding portion 35.
- the power supply terminal 23 (FIG. 1) of the stator assembly 10 is positioned between the covered terminal holding portion 34 and the core wire holding portion 35.
- the core wire of the power supply lead wire 14 held between the covering terminal holding portion 34 and the core wire holding portion 35 is joined to the power supply terminal 23 by spot welding or soldering. Therefore, a recessed portion 36 is provided between the covered terminal holding portion 34 and the core wire holding portion 35 of the annular plate portion 30 to secure a space for electrodes for spot welding the power supply terminal 23 and the core wire.
- a sensor substrate holding portion 37 for holding the sensor substrate 4 (FIG. 3) is formed on the radially inner side of the lead portion 40 of the lead wire wiring component 3.
- the sensor substrate holding portion 37 is a portion projecting radially inward from the annular plate portion 30, and the sensor substrate 4 is held on the upper surface (surface on the stator assembly 10 side) in FIG.
- the sensor substrate holding portion 37 has a pair of substrate pressing portions 38 (FIG. 5) extending in parallel with the plate surface of the annular plate portion 30.
- the pair of substrate pressing portions 38 are arranged at intervals in the circumferential direction of the annular plate portion 30.
- Each board pressing portion 38 is provided with an assembly foot 39a and an assembly foot 39b. In the radial direction of the annular plate portion 30, the assembly foot 39a is disposed on the radially outer side, and the assembly foot 39b is disposed on the radially inner side.
- the sensor substrate 4 shown in FIG. 3 is a substrate on which electronic components such as a Hall IC (Integrated Circuit) are mounted and a sensor circuit for detecting the position of the rotor 7 is formed.
- the sensor substrate 4 is formed with a joint portion to be joined to the board-in connector 17 of the sensor lead wire 15.
- the sensor substrate 4 has a notch that engages with the assembly foot 39 a at the radially inner end of the annular plate 30.
- the sensor substrate 4 also has a groove portion (not shown) that engages with the assembly foot 39b at the radially outer end of the annular plate portion 30.
- the sensor substrate 4 is held by the sensor substrate holding portion 37 by contacting the substrate pressing portion 38 and engaging the assembly legs 39a and 39b. Further, due to the contact between the sensor substrate 4 and the substrate pressing portion 38, deformation of the sensor substrate 4 due to pressure (resin pressure) applied during molding described later is suppressed.
- the lead portion 40 is a portion that protrudes radially outward from the annular plate portion 30.
- Three power supply lead wire holding grooves 41 (FIG. 5) for holding the power supply lead wire 14 are formed on the surface of the lead-out portion 40 on the side of the stator assembly 10.
- sensor lead wire holding grooves 42 (FIG. 4) for holding the sensor lead wires 15 are formed on the surface of the lead-out portion 40 opposite to the stator assembly 10.
- Four holding protrusions 47 are formed between adjacent sensor lead wire holding grooves 42.
- FIG. 6 is a perspective view of the lead-out portion 40 of the lead wire wiring component 3 as viewed from the side opposite to the stator assembly 10.
- a pair of first locking portions 43 are formed to protrude on both sides in the width direction of the lead portion 40 (that is, both sides in the circumferential direction of the annular plate portion 30).
- the first locking part 43 extends toward the radially outer side of the annular plate part 30.
- An attachment foot 63 (FIG. 8) of a sensor lead wire holding component 6 described later is engaged with the first locking portion 43.
- a pair of second locking portions 44 are formed so as to protrude inside the pair of first locking portions 43 on both sides in the width direction of the lead portion 40.
- the second locking portion 44 extends toward the inside in the radial direction of the annular plate portion 30.
- the power supply lead wire holding component 5 (FIG. 7) for holding the power supply lead wire 14 is attached to the lead assembly 40 on the stator assembly 10 side.
- a sensor lead wire holding component 6 (FIG. 8) for holding the sensor lead wire 15 is attached to the side of the lead-out portion 40 opposite to the stator assembly 10.
- FIG. 7 is a perspective view showing the shape of the power supply lead wire holding component 5.
- the power supply lead holding component 5 includes a plate-like base 51 in which three grooves 52 for holding the power supply lead 14 are formed, and both ends in the width direction of the base 51 (that is, both ends in the circumferential direction of the annular plate 30).
- a pair of mounting legs 53 projecting toward the lead wire wiring component 3 are provided.
- the pair of mounting legs 53 are respectively formed with protrusions 53a that protrude in opposite directions.
- Each mounting foot 53 is arranged at the radially inner end of the annular plate 30 in the base 51.
- a pair of ribs 54 extending further radially inward and an arm 55 connecting the tips of the pair of ribs 54 are formed at the radially inner end edge of the annular plate portion 30 in the base 51. ing.
- the mounting leg 53 of the power supply lead wire holding component 5 engages with the second locking portion 44 (FIG. 6) of the lead-out portion 40 from the radially inner side of the annular plate portion 30. Thereby, the power supply lead wire holding component 5 is attached to the lead portion 40.
- the power supply lead wire 14 (FIG. 3) is held between the power supply lead wire holding groove 41 of the lead-out portion 40 and the groove 52 of the power supply lead wire holding component 5.
- the arm 55 (FIG. 7) of the power supply lead holding part 5 is for preventing the power supply lead 14 from falling off.
- the annular plate portion 30 is provided with three folding pins 45 for folding the three power supply lead wires 14 routed along the inner peripheral wall 33 from the lead-out portion 40.
- the three folding pins 45 are arranged side by side in the circumferential direction of the annular plate portion 30. At the tip of each folding pin 45, a protrusion for preventing the positional deviation of the power supply lead 14 is formed.
- the power supply lead 14 held in the central power supply lead holding groove 41 is folded back by the central folding pin 45 and routed along the inner peripheral wall 33. Then, it is attached to the covered terminal holding part 34 arranged at a position of 180 degrees with respect to the lead part 40.
- the remaining two power lead wires 14 are respectively folded back by corresponding folding pins 45, routed along the inner peripheral wall 33, and arranged on both sides of the lead-out portion 40 in the circumferential direction of the annular plate portion 30. It is attached to one covering terminal holding part 34.
- FIG. 8 is a perspective view showing the shape of the sensor lead wire holding component 6.
- the sensor lead wire holding component 6 includes a plate-like base portion 61 in which five grooves 62 for holding the sensor lead wire 15 are formed, and both ends in the width direction of the base portion 61 (that is, the circumferential direction of the annular plate portion 30). It has a pair of attachment legs 63 protruding toward the lead wire wiring component 3. Each attachment foot 63 has a tip portion extending toward the radially inner side of the annular plate portion 30.
- the mounting leg 63 of the sensor lead wire holding component 6 engages with the first locking portion 43 (FIG. 6) of the lead-out portion 40 from the outside in the radial direction of the annular plate portion 30. Thereby, the sensor lead wire holding component 6 is attached to the lead portion 40.
- the sensor lead wire 15 (FIG. 3) is held between the sensor lead wire holding groove 42 of the lead portion 40 and the groove 62 of the sensor lead wire holding component 6.
- the sensor lead wire 15 is held between each of the four holding projections 47 and between each holding projection 47 and the mounting foot 53 (FIG. 7), and the power lead 14 of the annular plate portion 30 is wired. It is routed to the surface opposite to the surface.
- the board-in connector 17 (FIG. 3) at the tip of the sensor lead wire 15 is joined to the joint portion of the sensor substrate 4 held by the sensor substrate holding portion 37 by, for example, solder. Thereby, the sensor circuit mounted on the sensor substrate 4 is connected to the external device via the sensor lead wire 15.
- FIG. 9 is a perspective view showing a stator 1 (also referred to as a mold stator) obtained by molding the stator assembly 10 and the lead wire wiring component 3 with a mold resin 13.
- FIG. 10 is a partial cross-sectional view showing an electric motor 100 (also referred to as a molded electric motor) including the stator 1.
- the mold resin 13 is a thermosetting resin such as a bulk molding compound (BMC).
- BMC bulk molding compound
- the mold resin 13 is injected into a mold mold cavity where the stator 1 is installed and cured by heating. Further, in order to reduce the amount of mold resin to be used, a resin end piece 8 (resin piece) obtained by crushing the resin cured in the runner of the mold during the previous molding is used.
- the resin end material 8 will be described later.
- the end 18 on the side where the lead wire wiring component 3 is attached is covered with the mold resin 13 in the axial direction of the stator assembly 10. However, each of the lead portion 40, the power supply lead wire holding component 5, and the sensor lead wire holding component 6 is exposed. In the axial direction of the stator assembly 10, an opening 19 is formed at the end opposite to the lead wire wiring component 3.
- the electric motor 100 of this embodiment will be described.
- the electric motor 100 according to the present embodiment is inserted into the stator 1 in which the stator assembly 10 and the lead wire wiring component 3 are integrally molded with a mold resin 13, and the stator 1 is rotatably inserted inside the stator 1.
- the rotor 7 is inserted from the opening 19 of the stator 1 and faces the inner peripheral end 22 a (FIG. 2) of the teeth 22 of the stator 1.
- the rotor 7 has a cylindrical rotor iron core 71 formed of a laminate of electromagnetic steel plates and a plurality of permanent magnets 72 embedded in the rotor iron core 71.
- the permanent magnets 72 are arranged at equal intervals in the circumferential direction of the rotor core 71.
- a shaft 73 serving as a rotating shaft is integrally attached to the center of the rotor core 71.
- the shaft 73 is supported by a pair of bearings 74.
- One bearing 74 is held by the mold resin 13 at the end 18 of the stator assembly 10.
- the other bearing 74 is held by a bracket 75 provided in the opening 19 of the stator assembly 10.
- FIG. 11 is a diagram illustrating a configuration example of an air-conditioning apparatus 200 including the electric motor 100 according to the present embodiment.
- the air conditioner 200 includes an outdoor unit 201, an indoor unit 202, and a refrigerant pipe 203 that connects them.
- the outdoor unit 201 includes a first fan (blower) 205 and a first electric motor 206 that drives the first fan 205.
- the indoor unit 202 includes a second fan 207 and a second electric motor 208 that drives the second fan 207. At least one of the first electric motor 206 and the second electric motor 208 is configured by the electric motor 100 of the present embodiment.
- FIG. 11 also shows a compressor 209 that compresses the refrigerant in the outdoor unit 201.
- FIG. 12 is a flowchart for explaining a method of manufacturing stator 1 according to the first embodiment.
- the insulating part 11 is formed by integrally molding a thermoplastic resin or assembling a preformed thermoplastic resin to the stator core 2 formed by laminating electromagnetic steel sheets. Further, the coil 12 is wound around the teeth 22 of the stator core 2 via the insulating portion 11 to manufacture the stator assembly 10 shown in FIG. 1 (step S1). For example, the first winding portion 121 and the second winding portion 122 (FIG. 1) of the coil 12 are wound around the first tooth 221 and the second tooth 222 shown in FIG.
- step S1 wiring of the power supply lead wire 14 to the lead wire wiring component 3 (step S2) and attachment of the sensor substrate 4 (step S3) are performed.
- the three power supply lead wires 14 are arranged in the lead-out portion 40 of the lead wire wiring component 3, and each power supply lead wire 14 is routed along the inner peripheral wall 33 of the lead wire wiring component 3. Install. Further, the terminal portion from which the coating of each power supply lead wire 14 is peeled off is attached to each core wire holding portion 35. Thereafter, the power supply lead wire holding component 5 is attached to the lead portion 40 (step S2).
- the sensor substrate 4 is attached to the lead wire wiring component 3, the sensor lead wire 15 is disposed in the lead-out portion 40, and the board-in connector 17 of the sensor lead wire 15 is joined to the joint portion of the sensor substrate 4 by soldering. Thereafter, the sensor lead wire holding component 6 is attached to the lead portion 40 (step S3).
- steps S2 to S3 may be performed before step S1 described above, may be performed after step S1, or may be performed simultaneously.
- FIG. 13 is a perspective view showing a state in which the lead wire wiring component 3 is attached to the stator assembly 10.
- the leg portion 31 of the lead wire wiring component 3 contacts the upper surface of the outer wall portion 11 a of the stator assembly 10, and the pin 26 of the stator assembly 10 engages with the hole 32 of the leg portion 31. Further, the pin 26 is thermally welded to the leg portion 31.
- the core wire of the power supply lead wire 14 wired to the lead wire wiring component 3 is spot welded to the power supply terminal 23 of the stator assembly 10.
- stator assembly 10 is installed in the cavity 305 of the mold 300 (FIG. 14). Then, as schematically shown in FIG. 13, the resin end material 8 is supplied to the stator assembly 10 (particularly, the gap between adjacent winding portions 12a of the coil 12) (step S5).
- the configuration of the mold 300 will be described later.
- the resin end material 8 is obtained by crushing the resin cured by the runner of the mold die in the previous molding step, and the resin end material 8 is formed by the crushed mold resin 13. It should be noted that a material other than the mold resin 13 may be added during the process of crushing the resin cured by the runner of the mold die and forming the resin end material 8, and there are materials that are not added intentionally during the process. May be included. Therefore, more specifically, the material constituting the resin end material 8 includes a material constituting the mold resin 13 (for example, a thermosetting resin such as BMC).
- the winding portion 12 a of the coil 12 is wound around each tooth 22 of the stator core 2.
- the resin end material 8 is supplied to the whole from the upper side of the stator assembly 10, and in particular, supplied to a gap between adjacent winding portions 12 a of the coil 12.
- the resin end material 8 is supplied to the gap between the first winding portion 121 and the second winding portion 122 shown in FIG.
- the resin end material 8 is smaller in size than the gap between the adjacent winding portions 12a of the coil 12.
- the resin solid whose size is smaller than the gap between the winding portions 12a is referred to as “resin piece”. Since it is comprised in this way, the resin end material 8 can penetrate into the clearance gap between the coil parts 12a.
- the resin end material 8 is represented by a triangle for convenience of illustration, but the shape of the resin end material 8 is not particularly limited as long as it is a shape that can enter the gap of the winding portion 12 a. Moreover, the resin end material 8 may be in a powder form, for example. If the resin end material 8 is in a powder form, even if the structure of the gap of the winding part 12a is complicated, it can surely enter the gap of the winding part 12a. Therefore, the amount of mold resin used can be reduced as compared with the case of using a larger lump of resin.
- the resin end material is provided through the openings 30a. 8 can be supplied to the stator assembly 10.
- the size of the opening 30 a is a size that allows the resin end material 8 to pass therethrough.
- the resin end material 8 may be supplied to the stator assembly 10 before the lead wire wiring component 3 is attached to the stator assembly 10. In this case, the opening 30a may not be provided in the lead wire wiring component 3.
- the end material receiving portion 9 (receiving portion) is provided below the stator assembly 10. This is for preventing the positional deviation of the resin end material 8 spilling through the gap of the winding portion 12a.
- the end material receiving portion 9 is formed in an annular shape so as to close the lower end portion of the stator assembly 10.
- the end material receiving part 9 is installed in the cavity of the mold before the stator assembly 10.
- the end material receiving portion 9 is not limited to an annular shape.
- the end material receiving portion 9 only needs to prevent the resin end material 8 from spilling out (position shift) from the gap of the winding portion 12a, and has an area larger than the area of the lower end portion of the gap of the winding portion 12a. Just do it.
- the end material receiving part 9 may be provided by the number of the clearance gaps of the coil
- the end material receiving portion 9 can be made of, for example, resin. If it does in this way, the end material receiving part 9 will comprise a part of resin part of the stator 1 by the molding process mentioned later.
- the resin constituting the end material receiving portion 9 may be the same as or different from the material constituting the mold resin 13.
- the resin end material 8 is supplied to the stator assembly 10 after the stator assembly 10 is installed in the mold 300, but before the stator assembly 10 is installed in the mold 300.
- the resin end material 8 may be supplied. In this case, it is necessary to carry both the stator assembly 10 and the end material receiving portion 9 to the mold 300 after supplying the resin end material 8. Therefore, it is desirable that the end material receiving portion 9 has a locking portion that is locked to the stator assembly 10.
- the outer peripheral end 91 and the inner peripheral end 92 of the end material receiving portion 9 may be fitted to the outer wall portion 11a and the inner wall portion 11b of the insulating portion 11.
- the outer peripheral end 91 and the inner peripheral end 92 of the end material receiving portion 9 serve as a retaining portion.
- the end material receiving portion 9 may be provided with a locking portion shaped like a hook and engaged with the stator core 2.
- step S6 in FIG. 12 After supplying the resin end material 8 in this way, a molding process for integrally molding the stator assembly 10 with a mold resin is performed (step S6 in FIG. 12).
- FIG. 14 is a schematic diagram for explaining the configuration of a mold 300 used for molding.
- the mold 300 includes an upper mold 301 and a lower mold 302 that can be opened and closed, and a cavity 305 is formed therebetween.
- a runner 306 is formed between the upper mold 301 and the lower mold 302 as a flow path for injecting resin into the cavity 305.
- the runner 306 is connected to the upper end portion of the cavity 305.
- the resin end material 8 supplied to the stator assembly 10 is omitted.
- the lower mold 302 has a cylindrical core 303 protruding into the cavity 305.
- the core 303 is a portion that engages with the inside of the stator assembly 10.
- a stepped portion 308 is formed on the intermediate core 303 so as to protrude outward in the radial direction from the outer peripheral surface of the intermediate core 303.
- a large-diameter portion 307 that protrudes further outward in the radial direction than the step portion 308 is formed at the lower end portion of the core 303.
- the large diameter portion 307 is a portion corresponding to the opening 19 (FIG. 10) of the stator 1.
- the step portion 308 contacts the protrusion 11c formed on the lower end portion of the inner wall portion 11b (FIG. 1) of the stator assembly 10 and supports the stator assembly 10. Since the stator assembly 10 is thus supported from the radially inner side, it is not necessary to support the stator assembly 10 from the radially outer side. Therefore, the stator assembly 10 can be completely covered with the mold resin 13 from the outside in the radial direction. In other words, the interface between the stator core 2 (or the insulating portion 11) and the mold resin 13 can be prevented from being exposed to the outer surface of the stator 1. Therefore, the penetration
- the protrusion 11c of the stator assembly 10 is configured to be supported by the stepped portion 308.
- a plurality of protrusions 11c protrude radially outward from the outer peripheral surface of the core 303.
- a nail may be provided.
- a plurality of protrusions that are not connected to the core 303 may be provided on the upper surface of the large diameter portion 307.
- the mold resin wraps around the inner peripheral side of the insulating portion 11 and the outer periphery of the core 303 Since it reaches the surface, for example, the interface between the insulating portion 11 and the mold resin is prevented from being exposed to the inner surface of the stator 1. Therefore, the effect of suppressing the entry of moisture or the like into the stator 1 is further improved.
- the stator assembly 10 is installed in the cavity 305 as described above, and the resin end material 8 is placed next to the stator assembly 10 (especially adjacent to the coil 12). Supplied to the gap between the winding portions 12a. Note that a part of the lead portion 40 of the lead wire wiring component 3, the power supply lead wire holding component 5, and the sensor lead wire holding component 6 protrudes outside the cavity 305.
- the upper mold 301 is moved downward to close the cavity 305, and molten mold resin is injected from the runner 306 into the cavity 305.
- the mold resin injected into the cavity 305 covers the stator assembly 10 and the lead wire wiring component 3. Further, the mold resin also enters between the winding portions 12 a of the coil 12 and the resin end material 8 supplied to the stator assembly 10.
- the amount of mold resin injected from the runner 306 can be small.
- the mold 300 After injecting mold resin into the cavity 305, the mold 300 is heated. Thereby, the mold resin in the cavity 305 is cured. That is, the stator assembly 10 and the lead wire wiring component 3 are integrally formed of mold resin, and the stator 1 is formed. Moreover, the resin end material 8 is integrated with the mold resin.
- the stator 1 is taken out from the mold 300. Thereby, manufacture of the stator 1 of this Embodiment is completed. At this time, the resin hardened in the runner 306 of the mold 300 is taken out, crushed, and used as the resin end material 8 in the next molding process of the stator 1.
- the electric motor 100 is assembled (step S7). That is, as shown in FIG. 10, the shaft 73 with the rotor 7 and the bearing 74 attached thereto is inserted from the opening 19 of the stator 1.
- the bracket 75 is attached to the opening 19 of the stator 1.
- a waterproof cap 76 that suppresses intrusion of water or the like into the bearing 74 is attached to the outside of the bracket 75. Thereby, manufacture of the electric motor 100 is completed.
- the resin end material 8 is most preferably formed of a material that constitutes the mold resin 13, but may include a material that constitutes the mold resin 13 (that is, a material to which another material is added). Further, the resin end material 8 can be formed of a material different from the material constituting the mold resin 13. In addition, it is desirable that the resin end material 8 is obtained by crushing the resin taken out from the runner 306 of the mold 300 in the previous molding step, but is not limited thereto.
- the winding portion 12a (the first tooth) wound around the adjacent teeth 22 (the first tooth 221 and the second tooth 222) of the stator core 2 is used.
- the resin end material 8 (resin piece) is disposed in the gap between the winding part 121 and the second winding part 122). Therefore, the amount of mold resin used can be reduced, and the manufacturing cost of the stator 1 can be reduced.
- the resin end material 8 contains the material which comprises the mold resin 13
- the resin end material 8 is integrated with the mold resin 13, and the homogeneous mold resin 13 can be obtained. Thereby, quality improvement of a stator can be aimed at.
- the resin material 8 manufacturing by reusing the resin by using a material obtained by crushing the resin cured by the runner 306 of the mold 300 in the previous molding process (in other words, an already performed molding process). Costs can be further reduced.
- the resin end material 8 can be supplied after the lead wire wiring component 3 is attached to the stator assembly 10. It becomes easy.
- the process of preparing the stator core 2 which has the adjacent teeth 22 (the 1st teeth 221 and the 2nd teeth 222), and the winding part of the coil 12 in each teeth 22 A step of winding 12a (first winding portion 121 and second winding portion 122), a step of supplying resin end material 8 to the gap of winding portion 12a, stator core 2, coil 12 and resin
- the stator 1 is manufactured through a step of integrally molding the end material 8 with a mold resin.
- the amount of the mold resin used can be reduced, and the manufacturing cost of the stator 1 can be reduced. Can be achieved.
- the supply amount of the resin end material 8 can be adjusted according to the width of the gap between the winding portions 12a, it is possible to deal with various types of stators 1.
- the end material receiving portion 9 on the lower side of the stator core 2, it is possible to suppress the displacement of the resin end material 8. Thereby, the strength reduction due to the uneven distribution of the resin in the stator 1 can be prevented, and the quality of the stator 1 can be improved.
- the stator assembly 10 supplied with the resin end material 8 is moved. In doing so, it is possible to prevent the positional deviation of the resin end material 8. Thereby, the quality improvement of the stator 1 can be aimed at.
- the resin end material 8 is supplied after the lead wire wiring component 3 is attached to the stator assembly 10, for example, the resin end material 8 is supplied in a state where the stator assembly 10 is installed in the mold 300. This makes it possible to simplify the manufacturing process.
- the manufacturing cost of the stator 1 can be reduced.
- the manufacturing cost of the air conditioner 200 using the electric motor 100 having the stator 1 can be reduced by reducing the manufacturing cost of the stator 1 as described above.
- Embodiment 2 FIG. Next, a second embodiment of the present invention will be described.
- Embodiment 2 in addition to reducing the amount of mold resin used, the manufacturing process is further simplified and the quality of the stator 1 is improved.
- FIG. 15 is a perspective view for explaining a process of supplying the resin end material 8 to the stator assembly 10 in the second embodiment.
- the resin is applied to the stator assembly 10 (particularly between adjacent winding portions 12a of the coil 12).
- End material 8 is supplied.
- the resin end material 8 may be supplied to the stator assembly 10 and then installed in the mold 300.
- An end material receiving portion 9 is disposed below the stator assembly 10.
- a temporary molded body 81 in which a plurality of resin end materials 8 (resin pieces) are further solidified with resin is used.
- a repair material for the mold resin 13 or a binder resin can be used as the resin that hardens the resin end material 8.
- the temporary molded body 81 is preferably a lump such as clay.
- the position of the resin end material 8 can be fixed with respect to the stator assembly 10 by hardening the resin end material 8 with resin to form the temporary molded body 81. Therefore, it is possible to prevent a decrease in strength due to uneven distribution of resin in the stator 1 and to improve the quality of the stator 1.
- 15 shows an example in which three resin end pieces 8 are hardened with resin to form one temporary molded body 81.
- the number of resin end pieces 8 included in one temporary molded body 81 is particularly It is not limited.
- the temporary molded body 81 is desirably deformable by an external force. Further, the size and shape of the temporary molded body 81 may be any size and shape that can enter between the adjacent winding portions 12 a of the coil 12. The size of the opening 30 a of the lead wire wiring component 3 attached to the stator assembly 10 is larger than that of the temporary molded body 81.
- the resin end material 8 is preferably formed of a material constituting the mold resin 13, but includes a material constituting the mold resin 13 (ie, another material added). ). Further, the resin end material 8 can be formed of a material different from the material constituting the mold resin 13. Moreover, although it is desirable for the resin end material 8 to be what crushed resin hardened
- the mold assembly 300 and the lead wire wiring component 3 are integrally formed by molding resin by injecting mold resin into the mold 300 and heating.
- the stator shown in FIG. 9 is obtained. This molding process is as described in the first embodiment.
- the resin end material 8 included in the temporary molded body 81 is integrated with the mold resin 13. Further, the resin (the mold resin repair material or the binder resin) that hardens the resin end material 8 in the temporary molded body 81 is a resin that can coexist with the mold resin, and hardly changes its physical properties. In addition, the temporary molded body 81 may be formed by compressing a plurality of resin end materials 8 without using a resin.
- the configuration of the stator 1 of the second embodiment is the same as that of the stator 1 described in the first embodiment except that a temporary molded body 81 in which the resin end material 8 is solidified with resin is used.
- the configuration of the electric motor and the air conditioner using the stator 1 of the second embodiment is also the same as that of the electric motor 100 and the air conditioner 200 described in the first embodiment.
- the provisional molded body 81 in which the resin end material 8 (resin piece) is hardened with resin is supplied to the gap between the winding portions 12 a of the coil 12.
- the position of the resin end material 8 can be fixed with respect to 10. Therefore, in addition to the effects described in the first embodiment, it is possible to prevent the strength from being lowered due to the uneven distribution of the resin in the stator 1 and to improve the quality of the stator 1.
- the resin that hardens the resin end material 8 is a mold resin repair material or a binder resin, even if it coexists with the mold resin, it is difficult to cause changes in physical properties. Therefore, it can contribute to quality improvement of the stator 1.
- the end material receiving part 9 does not necessarily need to be used.
- the temporary molded body 81 in which the resin end material 8 is hardened with resin or the like it is possible to suppress spilling from the gap of the winding portion 12a.
- the uniformity of the resin distribution is higher than that in the second embodiment.
- the effect of reducing the amount of mold resin used can be sufficiently achieved.
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Abstract
Description
図1は、本発明の実施の形態1における固定子組立10の構成を示す斜視図である。固定子組立10は、後述する電動機100(図10)の固定子1(図9)を構成するものである。図1に示すように、固定子組立10は、固定子鉄心2と、固定子鉄心2に設けられた絶縁部(インシュレータ)11と、絶縁部11を介して固定子鉄心2に巻回されたコイル12とを有している。
次に、本発明の実施の形態2について説明する。実施の形態2は、モールド樹脂の使用量の低減に加えて、製造工程のさらなる簡略化と、固定子1の品質の向上を図るものである。
Claims (16)
- 隣り合う第1のティースと第2のティースとを有する固定子鉄心と、
前記第1のティースに巻回された第1の巻線部と、前記第2のティースに巻回された第2の巻線部とを有するコイルと、
前記第1の巻線部と前記第2の巻線部との隙間に配置された樹脂小片と、
前記固定子鉄心、前記コイルおよび前記樹脂小片を覆うモールド樹脂と
を備えたことを特徴とする固定子。 - 前記樹脂小片は、前記モールド樹脂を構成する材料を含んでいることを特徴とする請求項1に記載の固定子。
- 前記樹脂小片は、前に行われた前記固定子のモールド工程において金型のランナで硬化した樹脂を破砕して得られたものであることを特徴とする請求項1または2に記載の固定子。
- 前記樹脂小片は、樹脂で固められた複数の樹脂小片であることを特徴とする請求項1から3までの何れか1項に記載の固定子。
- 前記複数の樹脂小片を固める樹脂は、前記モールド樹脂の補修材またはバインダ樹脂であることを特徴とする請求項4に記載の固定子。
- 前記固定子鉄心に、リード線が配線された配線部品が取り付けられていることを特徴とする請求項1から5までの何れか1項に記載の固定子。
- 前記配線部品は、前記樹脂小片が通過可能な開口部を備えていることを特徴とする請求項6に記載の固定子。
- 固定子と、前記固定子の内側に配置された回転子とを備え、
前記固定子は、
隣り合う第1のティースと第2のティースとを有する固定子鉄心と、
前記第1のティースに巻回された第1の巻線部と、前記第2のティースに巻回された第2の巻線部とを有するコイルと、
前記第1の巻線部と前記第2の巻線部との隙間に配置された樹脂小片と、
前記固定子鉄心、前記コイルおよび前記樹脂小片を覆うモールド樹脂と
を備えたことを特徴とする電動機。 - 前記樹脂小片は、前記モールド樹脂を構成する材料を含んでいることを特徴とする請求項8に記載の電動機。
- 第1のファンと、前記第1のファンを駆動する第1の電動機とを備えた室外機と、
第2のファンと、前記第2のファンを駆動する第2の電動機とを備えた室内機と、
前記室外機と前記室内機とを連結する冷媒配管と
を備え、
前記第1の電動機および前記第2の電動機の少なくとも一方は、
固定子と、前記固定子の内側に配置された回転子とを備え、
前記固定子は、
隣り合う第1のティースと第2のティースとを有する固定子鉄心と、
前記第1のティースに巻回された第1の巻線部と、前記第2のティースに巻回された第2の巻線部とを有するコイルと、
前記第1の巻線部と前記第2の巻線部との隙間に配置された樹脂小片と、
前記固定子鉄心、前記コイルおよび前記樹脂小片を覆うモールド樹脂と
を備えたことを特徴とする空気調和装置。 - 前記樹脂小片は、前記モールド樹脂を構成する材料を含んでいることを特徴とする請求項10に記載の空気調和装置。
- 隣り合う第1のティースと第2のティースとを有する固定子鉄心を用意する工程と、
前記第1のティースおよび前記第2のティースに、コイルの第1の巻線部および第2の巻線部を巻回す工程と、
前記第1の巻線部と前記第2の巻線部との隙間に樹脂小片を供給する工程と、
前記固定子鉄心、前記コイルおよび前記樹脂小片を、モールド樹脂で一体成形するモールド工程と
を有することを特徴とする固定子の製造方法。 - 前記樹脂小片は、前記モールド樹脂を構成する材料を含んでいることを特徴とする請求項12に記載の固定子の製造方法。
- 前記樹脂小片は、前に行われた前記モールド工程においてモールド金型のランナで硬化した樹脂を破砕したものであることを特徴とする請求項12または13に記載の固定子の製造方法。
- 前記固定子鉄心の下側に、前記樹脂小片を受ける受け部を設置することを特徴とする請求項12から14までの何れか1項に記載の固定子の製造方法。
- 前記受け部は、前記固定子鉄心に係り止めされる係り止め部を有することを特徴とする請求項15に記載の固定子の製造方法。
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CN201580085153.3A CN108370177B (zh) | 2015-12-16 | 2015-12-16 | 定子、定子的制造方法、电动机及空调装置 |
JP2017555919A JP6415753B2 (ja) | 2015-12-16 | 2015-12-16 | 固定子、固定子の製造方法、電動機および空気調和装置 |
US15/760,011 US10594184B2 (en) | 2015-12-16 | 2015-12-16 | Stator, method of manufacturing stator, motor, and air conditioning apparatus |
PCT/JP2015/085159 WO2017104013A1 (ja) | 2015-12-16 | 2015-12-16 | 固定子、固定子の製造方法、電動機および空気調和装置 |
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CN111342618A (zh) * | 2018-12-19 | 2020-06-26 | 日本电产高科电机株式会社 | 定子单元、马达以及定子单元的制造方法 |
US11831212B2 (en) | 2018-06-01 | 2023-11-28 | Mitsubishi Electric Corporation | Stator, electric motor, compressor, and air conditioner |
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WO2020147897A1 (de) * | 2019-01-17 | 2020-07-23 | Hanon Systems Efp Deutschland Gmbh | Verfahren zur herstellung eines stators sowie stator |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US11831212B2 (en) | 2018-06-01 | 2023-11-28 | Mitsubishi Electric Corporation | Stator, electric motor, compressor, and air conditioner |
CN111342618A (zh) * | 2018-12-19 | 2020-06-26 | 日本电产高科电机株式会社 | 定子单元、马达以及定子单元的制造方法 |
CN111342618B (zh) * | 2018-12-19 | 2024-01-12 | 日本电产高科电机株式会社 | 定子单元、马达以及定子单元的制造方法 |
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JP6415753B2 (ja) | 2018-10-31 |
JPWO2017104013A1 (ja) | 2018-03-01 |
CN108370177B (zh) | 2020-07-31 |
CN108370177A (zh) | 2018-08-03 |
US20180254682A1 (en) | 2018-09-06 |
US10594184B2 (en) | 2020-03-17 |
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