WO2016051568A1 - 回転電機の回転子及び回転電機の回転子の製造方法 - Google Patents
回転電機の回転子及び回転電機の回転子の製造方法 Download PDFInfo
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- WO2016051568A1 WO2016051568A1 PCT/JP2014/076388 JP2014076388W WO2016051568A1 WO 2016051568 A1 WO2016051568 A1 WO 2016051568A1 JP 2014076388 W JP2014076388 W JP 2014076388W WO 2016051568 A1 WO2016051568 A1 WO 2016051568A1
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- rotor
- permanent magnet
- core
- rotating electrical
- electrical machine
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
- H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
-
- 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
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
Definitions
- the present invention relates to a rotor for a rotating electrical machine in which a permanent magnet is disposed on the outer peripheral surface of a core of the rotor and a method for manufacturing the rotor for the rotating electrical machine.
- Rotating electrical machines have two types of driving methods, “synchronous” and “inductive”, and the rotating electrical machines for industrial use often use robust and strong inductive rotating electrical machines.
- synchronous Induction rotating electrical machine
- inductive since a current also flows in the rotor in principle, heat generation of the rotor due to the current becomes a problem in increasing efficiency and output. Therefore, application of the synchronous rotating electrical machine to the rotating electrical machine for industrial use is progressing.
- the synchronous rotating electric machine uses a permanent magnet for the rotor field, the rotor does not generate heat theoretically, which is advantageous in terms of higher efficiency and higher output.
- the problem of heat generation due to harmonic loss due to the separation of permanent magnets due to centrifugal force during rotation and the carrier of inverter PWM (Pulse Width Modulation) control It is necessary to deal with it.
- the harmonic loss is specifically a loss due to the harmonic eddy current.
- Patent Document 1 permanent magnets are attached to the outer periphery of the rotor shaft at regular intervals, and a sprayed film ring is formed on the outer surface of the permanent magnet and the rotor shaft, so that the rotor can be rotated.
- a structure that suppresses separation of the permanent magnet due to centrifugal force has been proposed.
- Patent Document 2 proposes a structure that suppresses heat generation due to harmonic loss caused by the carrier of the inverter PWM control during rotation by spraying a conductive metal on the rotor surface.
- JP-A-4-101640 Japanese Patent No. 2977846
- the sprayed film ring is formed on the outer surface of the permanent magnet and the rotor shaft, it is possible to suppress the heat generation of the permanent magnet itself, but by metal spraying.
- the formed sprayed film ring generates heat due to harmonic loss. Therefore, the temperature of the permanent magnet rises due to heat generated by the sprayed film ring, and the permanent magnet may be thermally demagnetized.
- metal spraying is a method of forming a sprayed film ring by melting and spraying a conductive metal, and the sprayed film ring formed by metal spraying is not a little thermally deteriorated. For this reason, the conductivity of the sprayed film ring decreases due to the thermal deterioration, and thus the loss due to the harmonic eddy current generated in the permanent magnet increases, and the heat generation suppression effect may be reduced. In addition, since the sprayed film ring contains an oxide, it lacks reliability in terms of securing strength.
- the conductive coating formed by the metal spraying is not a little thermally deteriorated. For this reason, the electrical conductivity of the conductive film decreases due to the thermal degradation, so that the loss due to the harmonic eddy current generated in the rotor increases and the heat generation suppressing effect may be reduced. Moreover, since the said conductive film contains an oxide, it lacks reliability also in terms of ensuring strength.
- the present invention has been made in view of the above, and an object of the present invention is to provide a rotor of a rotating electrical machine capable of suppressing the separation of a permanent magnet due to centrifugal force during rotation and the temperature rise of the permanent magnet due to harmonic loss.
- the rotor of the rotating electrical machine includes a cylindrical core, a permanent magnet attached to the outer peripheral surface of the core, and a solid-state conductor. And an annular film formed by spraying particles onto the core and the permanent magnet, and integrating the core and the permanent magnet.
- Cross-sectional view of rotor of rotary electric machine according to Embodiment 1 1 is a longitudinal sectional view showing a configuration of a rotor before forming a film in the first embodiment.
- Cross-sectional view showing the configuration of the rotor before forming a film in the first embodiment Schematic diagram illustrating the manufacturing process of the rotor of the rotating electrical machine according to the first embodiment.
- Another schematic diagram showing the manufacturing process of the rotor of the rotating electrical machine according to the first embodiment The schematic diagram which shows the mode of the heat_generation
- FIG. 1 is a longitudinal sectional view of a rotor 1 of a rotating electrical machine according to the present embodiment
- FIG. 2 is a transverse sectional view of the rotor 1 of the rotating electrical machine according to the present embodiment.
- the longitudinal sectional view shown in FIG. 1 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- 2 is a cross-sectional view taken along a cross section orthogonal to the rotation center axis 2, and specifically, a cross-sectional view taken along the line II shown in FIG.
- the rotor 1 includes a cylindrical core 3, a plurality of permanent magnets 4 affixed to the outer peripheral surface of the core 3, and solid-state conductor particles are the core 3 and A plurality of permanent magnets 4 are sprayed to form a core 3 and an annular coating 5 that integrates the plurality of permanent magnets 4.
- the rotor 1 is a rotor of a surface permanent magnet (SPM: Surface Permanent Magnet) type synchronous rotating electric machine.
- SPM Surface Permanent Magnet
- the core 3 is formed of a laminated body or a cylindrical steel pipe in which a plurality of annular thin plates punched from electromagnetic steel sheets are laminated in the direction of the rotation center axis 2.
- a core through hole 6 is formed in the core 3 so as to penetrate the core 3 in the direction of the rotation center axis 2.
- the shaft 7 passes through the core through hole 6 and is fixed to the core 3.
- the direction of the rotation center axis 2 is referred to as “axial direction”.
- the plurality of permanent magnets 4 are arranged in the rotation direction of the rotor 1 on the outer peripheral surface of the core 3, and are respectively attached to the outer peripheral surface of the core 3 with an adhesive.
- four permanent magnets 4 are arranged at equal intervals in the rotation direction.
- the cross-sectional shape of the permanent magnet 4 is a crescent moon shape. That is, the permanent magnet 4 has an arc shape on both the inner peripheral surface and the outer peripheral surface.
- the longitudinal cross-sectional shape of the permanent magnet 4 is a rectangular shape.
- the axial length of the permanent magnet 4 is shorter than the axial length of the core 3.
- the permanent magnet 4 is a rare earth magnet or a ferrite magnet.
- the coating 5 is an annular coating that covers the core 3 and the plurality of permanent magnets 4. Specifically, the coating 5 covers all the outer surfaces of the plurality of permanent magnets 4 and covers the outer peripheral surface of the core 3 between the permanent magnets 4, thereby integrating the plurality of permanent magnets 4 and the core 3. .
- the outer surface of the permanent magnet 4 is an outer peripheral surface of the permanent magnet 4 and an end surface in the axial direction.
- the film 5 is formed by a cold spray method described later.
- FIG. 3 is a longitudinal sectional view showing a configuration of the rotor 1a which is the rotor 1 before forming the film 5 in the present embodiment
- FIG. 4 is a rotor before forming the film 5 in the present embodiment
- 1 is a transverse cross-sectional view illustrating a configuration of a rotor 1a that is 1.
- the longitudinal sectional view shown in FIG. 3 is a sectional view of a section including the rotation center axis 2.
- 4 is a cross-sectional view taken along a cross section orthogonal to the rotation center axis 2, and specifically, a cross-sectional view taken along the line II-II shown in FIG.
- FIG. 5 is a schematic diagram showing a manufacturing process of the rotor of the rotating electrical machine according to the present embodiment.
- FIG. 5 about the rotor 1, the longitudinal cross-sectional view similar to FIG. 1 is shown, and the same code
- the rotor 1a is manufactured. That is, a plurality of permanent magnets 4 are attached to the outer peripheral surface of the core 3. Further, the shaft 7 is passed through the core through hole 6, and the shaft 7 is fixed to the core 3. The shaft 7 may be fixed to the core 3 before the permanent magnet 4 is pasted or after the permanent magnet 4 is pasted. The shaft 7 is fitted and fixed to the core 3 by any one of press fitting, shrink fitting, and cold fitting.
- the cold spray device 10 accelerates the gas into which the gas particles 11 are supplied, the conductor particle supply unit 12 that supplies the conductor particles 15, and the gas into which the conductor particles 15 are charged to supersonic speed.
- a Laval nozzle 13 is provided.
- the Laval nozzle 13 is formed with a channel that expands toward the outlet at the tip.
- the Laval nozzle 13 accelerates the gas to supersonic speed.
- the gas flow rate is set to 500 m / s to 1000 m / s.
- the flow rate of gas is not this limitation.
- the gas is set at a temperature lower than the melting point of the conductor particles 15.
- the gas can be nitrogen gas, helium gas, air, or a mixed gas thereof.
- the gas is used at normal temperature or heated, and when the conductive particles 15 are formed from aluminum, the temperature of the gas is set in the range from normal temperature to 500 ° C.
- the temperature of gas is not this limitation.
- the particle diameter of the conductor particles 15 is 5 ⁇ m to 50 ⁇ m when the conductor particles 15 are made of aluminum.
- the particle size of the conductor particle 15 is not this limitation.
- the conductive particles 15 can be formed from a material having higher conductivity and thermal conductivity than the permanent magnet 4.
- the conductor particles 15 can be formed from aluminum, an aluminum alloy, copper, or a copper alloy.
- copper is pure copper, and the copper alloy can be chromium copper, Corson alloy, beryllium copper, or alumina dispersion strengthened copper.
- the tip of the Laval nozzle 13 of the cold spray device 10 configured as described above is opposed to the outer peripheral surface of the core 3, and supersonic conductor particles 15 extend from the tip of the Laval nozzle 13 to the surface of the core 3 and the plurality of permanent magnets 4. Is sprayed.
- the temperature of the gas is set to a temperature lower than the melting point of the conductor particles 15, the conductor particles 15 collide with and adhere to the surfaces of the core 3 and the plurality of permanent magnets 4 in the solid state.
- the Laval nozzle 13 is arranged so that the tip thereof is directed toward the rotation center axis 2 and sprays the conductor particles 15 toward the outer peripheral surface of the core 3.
- the Laval nozzle 13 can spray the conductor particles 15 while changing the posture from a state orthogonal to the rotation center axis 2 to a state parallel to the rotation center axis 2.
- the spray angle which is an angle between the straight line parallel to the rotation center axis 2 and the axis of the Laval nozzle 13 is represented by ⁇ .
- the spray angle ⁇ is 90 °.
- the Laval nozzle 13 can be rotated around the rotation center axis 2.
- the spray angle ⁇ is adjusted, and the Laval nozzle 13 is rotated around the rotation center axis 2 so that the surface of the core 3 and the plurality of permanent magnets 4 has a constant film thickness.
- a film 5 can be formed.
- the rotor 1 a may be rotated around the rotation center axis 2.
- the film thickness of the coating 5 is not particularly limited, but can be set between 0.3 mm and 50 mm in order to maintain the strength of the coating 5 and the joining between members.
- the joining between members is joining of the film 5 and the core 3 or the permanent magnet 4.
- the film 5 is bonded to the core 3 and the plurality of permanent magnets 4.
- the rotor 1 constitutes a synchronous rotating electric machine together with a stator (not shown), and the synchronous rotating electric machine includes an inverter that performs PWM control of a current flowing through the stator winding.
- the rotor 1 receives a torque by a rotating magnetic field generated from the stator winding and rotates around the rotation center axis 2.
- the plurality of permanent magnets 4 attached to the outer peripheral surface of the core 3 receive a centrifugal force as the rotor 1 rotates, but are separated from the core 3 by being integrated with the core 3 by the coating 5. Is suppressed. That is, the film 5 has a reinforcing effect that suppresses the peeling of the permanent magnet 4 from the core 3 due to the centrifugal force when the rotor 1 rotates.
- a dense film 5 in which the enlargement of crystal grains is suppressed is formed.
- the strength of the coating 5 is improved, and the core 3 and the plurality of permanent magnets 4 are reliably joined by the coating 5.
- the conductor particles 15 are sprayed in a solid state, so that oxidation and thermal transformation of the coating 5 are suppressed. Thereby, embrittlement of the film 5 is suppressed and the strength of the film 5 is improved.
- the coating 5 has no thermal contraction that occurs when the conductor is melted, and the gap formed between the different members can be suppressed. Thereby, the core 3 and the plurality of permanent magnets 4 are reliably joined by the coating 5.
- the cold spray method since the thermal deterioration of the film 5 is suppressed, a decrease in the conductivity of the film 5 is suppressed. Thereby, at the time of inverter PWM control of the rotating electrical machine, the loss due to the harmonic eddy current generated in the coating 5 becomes larger than the loss due to the harmonic eddy current generated in the coating formed by conventional metal spraying, Since the loss due to the harmonic eddy current generated in the permanent magnet 4 is suppressed, heat generation in the permanent magnet 4 is suppressed, and the temperature rise of the permanent magnet 4 is suppressed.
- a decrease in the thermal conductivity of the coating 5 is also suppressed, and the heat generated in the coating 5 can be efficiently released to the core 3, and the temperature of the permanent magnet 4 due to the heat generated in the coating 5. The rise is suppressed.
- thermal demagnetization of the permanent magnet 4 is suppressed, and a decrease in efficiency of the rotating electrical machine is suppressed.
- thermal strain and brittleness of the composition generated in the coating 5 by spraying, welding, or brazing can be suppressed, and further, it occurs by spraying, welding, or brazing. It is not necessary to provide a cooling time, and man-hours can be reduced.
- the coating 5 is formed in a state where the shaft 7 is mounted on the core 3 in advance. Thereby, it can suppress that the conductor particle 15 fixes to the internal peripheral surface of the core 3, a process of removing the conductor particle 15 can be abbreviate
- FIG. 6 is another schematic diagram illustrating a manufacturing process of the rotor of the rotating electrical machine according to the present embodiment.
- the process of forming the film 5 using the cold spray device 10 is schematically shown in the same manner as FIG. 5, and the same components as those shown in FIG. Yes.
- the shaft 7 is not fitted into the core through hole 6 and the core through hole 6 is in a hollow state, but in this case as well, using the cold spray device 10 as in the case of FIG. 5.
- a film 5 can be formed.
- the shaft 7 is fitted into the core through hole 6 after the coating 5 is formed.
- the conductor particles 15 can be formed from a material having a higher conductivity than the permanent magnet 4. Thereby, the heat_generation
- FIG. 7 is a schematic diagram showing a state of heat generation and heat dissipation in the rotor 1 due to harmonic eddy currents in the present embodiment.
- Harmonic eddy currents 18 and harmonic eddy currents 19 are generated in the film 5 and the permanent magnet 4 by the harmonics resulting from the inverter PWM control carrier, respectively.
- the loss due to the harmonic eddy current 18 and the loss due to the harmonic eddy current 19 change depending on the conductivity of the film 5 and the conductivity of the permanent magnet 4, and the loss is higher for materials with higher conductivity. Loss.
- the loss due to the harmonic eddy current 18 generated in the film 5 is caused by the harmonic eddy current 19 generated in the permanent magnet 4. Bigger than. In other words, loss due to the harmonic eddy current 19 in the permanent magnet 4 can be further reduced, and heat generation in the permanent magnet 4 can be suppressed.
- the conductor particles 15 can be formed of a material having a higher thermal conductivity than the core 3 and the permanent magnet 4.
- the conductor particles 15 can be formed from aluminum, an aluminum alloy, copper, or a copper alloy.
- the heat generated in the film 5 can be efficiently released to the core 3. Thereby, the temperature rise of the permanent magnet 4 due to the heat generated in the film 5 can be suppressed.
- a material with high conductivity has high thermal conductivity.
- the conductive particles 15 can be formed from a so-called highly rigid material.
- the conductor particles 15 can be formed from titanium, stainless steel, or a copper alloy.
- the stainless steel is an austenitic stainless steel.
- the conductive particles 15 can be formed from a nonmagnetic material.
- the conductor particles 15 can be formed from a nonmagnetic material.
- leakage magnetic flux can be suppressed and output reduction of the rotating electrical machine can be suppressed.
- the above-described aluminum, aluminum alloy, copper, copper alloy, titanium, and stainless steel are all non-magnetic materials.
- the shape of the permanent magnet 4 shown in FIGS. 1 and 2 is an example, and is not limited to the illustrated example.
- the cross-sectional shape of the permanent magnet 4 may be an arc with a constant radial thickness.
- Each permanent magnet 4 may be composed of a plurality of magnets divided in the axial direction.
- the present embodiment it is possible to suppress the separation of the permanent magnet 4 due to the centrifugal force during the rotation of the rotor 1 and the temperature rise of the permanent magnet 4 due to harmonic loss. Moreover, according to this Embodiment, the rotary electric machine provided with the rotor 1 and the electric equipment provided with the said rotary electric machine can be provided.
- FIG. 8 is a longitudinal sectional view of a rotor 1 of a rotating electrical machine according to a modification of the present embodiment
- FIG. 9 is a transverse sectional view of the rotor 1 of the rotating electrical machine according to a modification of the present embodiment
- the longitudinal sectional view shown in FIG. 8 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- the transverse sectional view shown in FIG. 9 is a sectional view taken along a section orthogonal to the rotation center axis 2 and specifically, a sectional view taken along the line III-III shown in FIG.
- FIG. 8 and FIG. 9 the same components as those shown in FIG. 1 and FIG.
- the rotor 1 As shown in FIGS. 8 and 9, the rotor 1 according to this modification includes a cylindrical core 3, a cylindrical permanent magnet 4 a attached to the outer peripheral surface of the core 3, and a solid state conductor. Particles are formed by spraying the core 3 and the permanent magnet 4a, and an annular coating 5 that integrates the core 3 and the permanent magnet 4a is provided.
- the permanent magnet 4a is composed of one cylindrical magnet. Further, the permanent magnet 4a is attached to the outer peripheral surface of the core 3 with an adhesive. Further, the axial length of the permanent magnet 4 a is shorter than the axial length of the core 3.
- the coating 5 can be formed using the cold spray device 10 in the same manner as in FIG.
- the coating 5 covers the entire outer surface of the permanent magnet 4a and covers the outer peripheral surface of the core 3 on both sides in the axial direction of the permanent magnet 4a.
- the outer surface of the permanent magnet 4a is the outer peripheral surface of the permanent magnet 4a and the end surface in the axial direction.
- the permanent magnet 4a formed in a cylindrical shape may be broken by receiving a centrifugal force when the rotor 1 rotates.
- the permanent magnet 4a is integrated with the core 3 by the film 5
- the permanent magnet 4a is temporarily broken and the permanent magnet 4a is divided in the rotation direction of the rotor 1. Even when it becomes, it is suppressed that the magnet piece divided
- the rotation of the rotor 1 When the permanent magnet 4a that has been subjected to centrifugal force sometimes breaks and the permanent magnet 4a is divided in the rotational direction of the rotor 1, the magnet pieces that are divided in the rotational direction due to cracking are subjected to centrifugal force. There is a possibility of peeling from the core 3.
- the rotor 1 according to the present modification can be manufactured by the same manufacturing method as in the above-described embodiment.
- the permanent magnet 4a may be composed of a plurality of magnets divided in the axial direction, and in this case as well, the same effects as in the present modification can be obtained.
- FIG. FIG. 10 is a longitudinal sectional view of the rotor 1 of the rotating electrical machine according to the present embodiment
- FIG. 11 is a transverse sectional view of the rotor 1 of the rotating electrical machine according to the present embodiment.
- the longitudinal sectional view shown in FIG. 10 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- the transverse sectional view shown in FIG. 11 is a sectional view taken along a section orthogonal to the rotation center axis 2 and specifically, a sectional view taken along the line IV-IV shown in FIG. 10 and 11, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.
- the rotor 1 includes a cylindrical core 3, a plurality of permanent magnets 4 affixed to the outer peripheral surface of the core 3, and solid-state conductor particles are the core 3 and An annular coating 5 that is formed by spraying the plurality of permanent magnets 4 and integrates the core 3 and the plurality of permanent magnets 4 and an annular reinforcing member 21 that covers the outer peripheral surface of the coating 5 are provided.
- the permanent magnets 4 are arranged in the rotation direction of the rotor 1 on the outer peripheral surface of the core 3.
- the film 5 is formed using the cold spray method as described in the first embodiment.
- the inner peripheral surface of the reinforcing member 21 is in contact with the outer peripheral surface of the coating 5 over the entire periphery.
- the reinforcing member 21 has an annular cross section, and the outer peripheral shape of the coating 5 is circular, and the radius of the inner peripheral circle of the reinforcing member 21 is equal to the radius of the outer peripheral circle of the coating 5.
- the rotor 1 is manufactured by attaching a plurality of permanent magnets 4 to the outer peripheral surface of the core 3 to form the coating 5 and then arranging a reinforcing member 21 covering the coating 5 on the outer peripheral surface of the coating 5.
- the reinforcing member 21 can be disposed on the outer peripheral surface of the film 5 by any one of press fitting, shrink fitting, and cold fitting to the core 3 on which the film 5 is formed. After arranging the reinforcing member 21 on the outer peripheral surface of the film 5, the shaft 7 is attached to the core 3 by any one of press fitting, shrink fitting, and cold fitting, and the core 3 is attached from the inner peripheral surface side of the core 3.
- the reinforcing member 21 can be disposed on the outer peripheral surface of the coating 5 by being directly wound around the core 3 on which the coating 5 is formed.
- the reinforcing member 21 can be formed of a so-called highly rigid material.
- the reinforcing member 21 can be formed of carbon fiber reinforced plastic (CFRP: Carbon Fiber Reinforced Plastics), glass fiber reinforced plastic (GFRP: Glass Fiber Reinforced Plastics), titanium, or stainless steel.
- CFRP Carbon Fiber Reinforced Plastics
- GFRP Glass Fiber Reinforced Plastics
- titanium or stainless steel.
- the stainless steel is an austenitic stainless steel.
- the reinforcing member 21 is formed of CFRP or GFRP
- the reinforcing member 21 can be formed by directly winding a CFRP or GFRP fiber bundle or a tape-like fiber around the core 3 on which the film 5 is formed.
- the reinforcing member 21 can be formed of a nonmagnetic material. Thereby, the output fall of the rotary electric machine by leakage magnetic flux can be suppressed.
- CFRP CFRP
- GFRP GFRP
- titanium titanium
- stainless steel are all non-magnetic materials.
- the reinforcing effect of suppressing the separation of the permanent magnet 4 due to the centrifugal force during rotation can be further enhanced.
- the reinforcing member 21 has an annular cross section, the outer peripheral shape of the coating 5 is circular, and the radius of the inner peripheral circle of the reinforcing member 21 is equal to the radius of the outer peripheral circle of the coating 5.
- the inner peripheral surface of the member 21 is in contact with the outer peripheral surface of the coating 5 over the entire periphery.
- the reinforcing member 21 comes into contact with the coating 5 on the surface, and the centrifugal force during the rotation of the rotor 1 is uniformly applied to the reinforcing member 21. For this reason, stress concentration in the reinforcing member 21 is suppressed and the required strength is reduced, so that the cost of the reinforcing member 21 can be reduced.
- the shape of the reinforcing member 21 is an example, and is not limited to the illustrated example.
- the outer peripheral shape of the film 5 may be a shape other than a circular shape, and the inner peripheral shape of the reinforcing member 21 may be the same shape as the outer peripheral shape of the film 5. Further, the inner peripheral surface of the reinforcing member 21 and the outer peripheral surface of the coating 5 may not be in contact with each other, and a part of the inner peripheral surface of the reinforcing member 21 and a part of the outer peripheral surface of the coating 5 may be in contact with each other. .
- the reinforcing member 21 by forming the reinforcing member 21 from CFRP, GFRP, titanium, or stainless steel, it is possible to further enhance the reinforcing effect of suppressing the separation of the permanent magnet 4 due to centrifugal force during rotation, and to suppress leakage magnetic flux. Thus, it is possible to suppress a decrease in output of the rotating electrical machine.
- this Embodiment can also be applied to the single cylindrical permanent magnet 4a shown in FIG.8 and FIG.9.
- FIG. 12 is a longitudinal sectional view of the rotor 1 of the rotating electrical machine according to the present embodiment.
- the longitudinal sectional view shown in FIG. 12 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- the cross-sectional view taken along line VV shown in FIG. 12 is the same as FIG. In FIG. 12, the same components as those shown in FIG. 1 are denoted by the same reference numerals.
- the rotor 1 As shown in FIG. 12, the rotor 1 according to the present embodiment is affixed to a cylindrical core 3 and an outer peripheral surface of the core 3, and is divided in the axial direction and the rotational direction.
- a plurality of permanent magnets 4 chamfered at both ends in the direction and solid-state conductive particles are sprayed onto the core 3 and the plurality of permanent magnets 4 so that the core 3 and the plurality of permanent magnets 4 are integrated.
- an annular film 5 to be converted the permanent magnet 4 is divided into two axially divided into a permanent magnet 4b having chamfered 30 at both ends in the axial direction and a permanent magnet 4c having chamfered 30 at both ends in the axial direction. Yes.
- the permanent magnet 4 b is divided into four in the rotation direction of the rotor 1.
- the permanent magnet 4c is also divided into four in the rotational direction of the rotor 1 like the permanent magnet 4b.
- FIG. 13 is a longitudinal sectional view showing the adhesion of the conductor particles 15 to the rotor 1 according to the present embodiment.
- the longitudinal sectional view shown in FIG. 13 is a sectional view of a section including the rotation center axis 2 of the rotor 1, and shows a part of the configuration of the rotor 1 shown in FIG.
- the same components as those shown in FIG. 12 are denoted by the same reference numerals.
- permanent magnets 4 b and 4 c are attached to the outer peripheral surface of the core 3.
- the permanent magnets 4b and 4c are arranged in the axial direction and are arranged at a distance from each other. Further, a chamfer 30 is applied to each end of the permanent magnet 4b in the axial direction. Similarly, a chamfer 30 is applied to each end of the permanent magnet 4c in the axial direction.
- the coating 5 is formed by attaching the conductive particles 15 sprayed from the Laval nozzle 13 of the cold spray device 10 to the surfaces of the core 3 and the permanent magnets 4b and 4c.
- FIG. 14 is a longitudinal sectional view showing the adhesion of the conductor particles 15 to the rotor 1 having a square magnet end in the comparative example of the present embodiment.
- the longitudinal sectional view shown in FIG. 14 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- the same components as those shown in FIG. 12 are denoted by the same reference numerals.
- permanent magnets 4 d and 4 e are attached to the outer peripheral surface of the core 3.
- the permanent magnets 4d and 4e are arranged in the axial direction and are arranged at a distance from each other.
- the permanent magnet 4d is not chamfered, and a right-angled corner is formed at each axial end of the permanent magnet 4d.
- the permanent magnet 4e is not chamfered, and a right-angled corner is formed at each axial end of the permanent magnet 4e.
- the coating 5 is formed by the conductive particles 15 sprayed from the Laval nozzle 13 of the cold spray device 10 being attached to the surfaces of the core 3 and the permanent magnets 4d and 4e.
- the conductor particles 15 are less likely to adhere to the end surfaces of the end portions in the axial direction of the permanent magnet 4d.
- the conductor particles 15 are less likely to adhere to the end surfaces of the end portions in the axial direction of the permanent magnet 4e. Therefore, the film 5 is divided between the permanent magnets 4d and 4e, and an adhesion defect in which the film 5 does not continue is likely to occur.
- the end surfaces of the end portions are inclined with respect to the direction orthogonal to the axial direction, and the coating 5 is formed by a cold spray method.
- the adhesion of the conductor particles at each end is improved, and the production efficiency of the coating 5 can be improved.
- the permanent magnet 4 is divided into two parts in the axial direction, but may be divided into three or more parts. Even in this case, the same effect as in the present embodiment can be obtained by chamfering 30 at the corners of each end of the divided magnet.
- the permanent magnet 4 is divided in the axial direction, but may be integrated in the axial direction. Even in this case, the same effects as in the present embodiment can be obtained by chamfering 30 at the corners of each end of the permanent magnet 4 in the axial direction.
- the permanent magnet 4 is divided into four in the rotation direction of the rotor 1.
- the present embodiment The same effect as the form can be obtained.
- the permanent magnet 4 was divided
- the cross-sectional shape of the permanent magnet 4 is a crescent shape as shown in FIG.
- the adhesion of the conductor particles at each end of the permanent magnet 4 in the rotation direction of the rotor 1 is improved.
- chamfering 30 is applied to the corners of each end portion in the rotation direction of the permanent magnet 4 to rotate the permanent magnet 4. The adhesion of the conductor particles at each end in the direction is also improved.
- FIG. 15 is a longitudinal sectional view of the rotor 1 of the rotating electrical machine according to the present embodiment.
- the longitudinal sectional view shown in FIG. 15 is a sectional view of a section including the rotation center axis 2 of the rotor 1.
- the cross-sectional view taken along the line VI-VI shown in FIG. 15 is the same as FIG. In FIG. 15, the same components as those shown in FIG.
- the rotor 1 includes a cylindrical core 3 having a metal coating 35a on the outer peripheral surface, a metal coating 35a applied to the outer peripheral surface of the core 3, and a metal coating 35b on the surface.
- a metal coating 35a on the outer peripheral surface
- a metal coating 35a applied to the outer peripheral surface of the core 3
- a metal coating 35b on the surface.
- the metal coatings 35a and 35b are each formed of a metal material having higher adhesion of conductor particles than the core 3 and the plurality of permanent magnets 4.
- the metal coatings 35a and 35b can be formed from nickel, copper, or aluminum.
- the core 3 is made of an electromagnetic steel plate, and the permanent magnet 4 is a rare earth magnet or a ferrite magnet.
- a metal coating 35 a having better adhesion of conductor particles than the core 3 is applied to the outer peripheral surface of the core 3, and a metal coating 35 b having better adhesion of conductor particles than the permanent magnet 4 is applied to the surface of the permanent magnet 4.
- the production efficiency of the film 5 can be improved.
- the production efficiency of the film 5 is improved, the speed of the conductor particles at the time of spraying can be reduced.
- the gas used for spraying the conductor particles can have a higher molecular weight, it is possible to change from expensive helium to cheaper nitrogen or air. Therefore, the manufacturing cost of the film 5 can be reduced.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
図1は、本実施の形態に係る回転電機の回転子1の縦断面図、図2は、本実施の形態に係る回転電機の回転子1の横断面図である。ここで、図1に示す縦断面図は、回転子1の回転中心軸線2を含む断面による断面図である。また、図2に示す横断面図は、回転中心軸線2と直交する断面による断面図であり、具体的には図1に示すI-I線による断面図である。
図10は、本実施の形態に係る回転電機の回転子1の縦断面図、図11は、本実施の形態に係る回転電機の回転子1の横断面図である。ここで、図10に示す縦断面図は、回転子1の回転中心軸線2を含む断面による断面図である。また、図11に示す横断面図は、回転中心軸線2と直交する断面による断面図であり、具体的には図10に示すIV-IV線による断面図である。なお、図10及び図11では、図1及び図2に示す構成要素と同一の構成要素には同一の符号を付している。
図12は、本実施の形態に係る回転電機の回転子1の縦断面図である。ここで、図12に示す縦断面図は、回転子1の回転中心軸線2を含む断面による断面図である。なお、図12に示すV-V線による横断面図は図2と同じである。また、図12では、図1に示す構成要素と同一の構成要素には同一の符号を付している。
図15は、本実施の形態に係る回転電機の回転子1の縦断面図である。ここで、図15に示す縦断面図は、回転子1の回転中心軸線2を含む断面による断面図である。なお、図15に示すVI-VI線による横断面図は図2と同じである。また、図15では、図1に示す構成要素と同一の構成要素には同一の符号を付している。
Claims (14)
- 円筒形状のコアと、
前記コアの外周面に貼り付けられた永久磁石と、
固相状態の導体粒子が前記コア及び前記永久磁石に吹き付けられて形成され、前記コア及び前記永久磁石を一体化する環状の皮膜と、
を備えることを特徴とする回転電機の回転子。 - 前記皮膜の外周面は、環状の補強部材で覆われていることを特徴とする請求項1に記載の回転電機の回転子。
- 前記導体粒子は、前記永久磁石よりも導電率の高い材料から形成されることを特徴とする請求項1又は2に記載の回転電機の回転子。
- 前記導体粒子は、前記コア及び前記永久磁石よりも熱伝導率の高い材料から形成されることを特徴とする請求項3に記載の回転電機の回転子。
- 前記導体粒子は、アルミニウム、アルミニウム合金、銅、又は銅合金から形成されることを特徴とする請求項4に記載の回転電機の回転子。
- 前記導体粒子は、非磁性の材料から形成されることを特徴とする請求項1又は2に記載の回転電機の回転子。
- 前記導体粒子は、チタン、ステンレス、又は銅合金から形成されることを特徴とする請求項6に記載の回転電機の回転子。
- 前記補強部材は、非磁性の材料から形成されることを特徴とする請求項2に記載の回転電機の回転子。
- 前記補強部材は、炭素繊維強化プラスチック、ガラス繊維強化プラスチック、チタン、又はステンレスから形成されることを特徴とする請求項8に記載の回転電機の回転子。
- 前記永久磁石の端部が、面取りされていることを特徴とする請求項1から9のいずれか1項に記載の回転電機の回転子。
- 前記永久磁石及び前記コアには、それぞれ、前記コア及び前記永久磁石よりも前記導体粒子の付着性が高い金属コーティングが施されていることを特徴とする請求項1から10のいずれか1項に記載の回転電機の回転子。
- 前記金属コーティングは、ニッケル、銅、又はアルミニウムから形成されることを特徴とする請求項11に記載の回転電機の回転子。
- 円筒形状のコアの外周面に永久磁石を貼り付ける工程と、
固相状態の導体粒子を前記コア及び前記永久磁石に吹き付け、前記コア及び前記永久磁石を一体化する環状の皮膜を形成する工程と、
を含むことを特徴とする回転電機の回転子の製造方法。 - 前記皮膜を形成した後、前記皮膜の外周面に前記皮膜を覆う環状の補強部材を配置する工程を含むことを特徴とする請求項13に記載の回転電機の回転子の製造方法。
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JP2015516357A JP6087427B2 (ja) | 2014-10-02 | 2014-10-02 | 回転電機の回転子及び回転電機の回転子の製造方法 |
PCT/JP2014/076388 WO2016051568A1 (ja) | 2014-10-02 | 2014-10-02 | 回転電機の回転子及び回転電機の回転子の製造方法 |
DE112014007020.3T DE112014007020T5 (de) | 2014-10-02 | 2014-10-02 | Rotor für eine elektrische rotationsmaschine und herstellungsverfahren für einen rotor einer elektrischen rotationsmaschine |
KR1020177011406A KR101919267B1 (ko) | 2014-10-02 | 2014-10-02 | 회전 전기의 회전자 및 회전 전기의 회전자의 제조 방법 |
CN201480082354.3A CN107078572B (zh) | 2014-10-02 | 2014-10-02 | 旋转电机的转子及旋转电机的转子的制造方法 |
TW104101771A TWI587605B (zh) | 2014-10-02 | 2015-01-20 | 旋轉電機之轉子,以及旋轉電機之轉子之製造方法 |
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EP3373417A1 (de) * | 2017-03-06 | 2018-09-12 | Siemens Aktiengesellschaft | Flussführungselement mit schichtaufbau |
CN108574362A (zh) * | 2017-03-09 | 2018-09-25 | 西门子公司 | 用于电机的壳体单元 |
EP3629454A1 (de) * | 2018-09-28 | 2020-04-01 | Siemens Aktiengesellschaft | Verfahren zur herstellung eines rotors für eine elektrische rotierende maschine |
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TWI613878B (zh) * | 2016-10-28 | 2018-02-01 | 財團法人工業技術研究院 | 永磁式轉子與永磁式轉動構件 |
CN108336839B (zh) * | 2018-01-26 | 2019-08-02 | 北京金风科创风电设备有限公司 | 转子、电机、加强环工装及其安装方法 |
KR102631738B1 (ko) * | 2018-12-17 | 2024-02-01 | 닛폰세이테츠 가부시키가이샤 | 적층 코어, 적층 코어의 제조 방법 및 회전 전기 기기 |
CN114072989A (zh) * | 2019-07-11 | 2022-02-18 | 三菱电机株式会社 | 转子、电动机及转子的制造方法 |
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CN107078572A (zh) | 2017-08-18 |
KR101919267B1 (ko) | 2018-11-15 |
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KR20170066481A (ko) | 2017-06-14 |
DE112014007020T5 (de) | 2017-07-13 |
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