WO2024114004A1 - Axial flux motor and eddy current loss suppression method - Google Patents

Axial flux motor and eddy current loss suppression method Download PDF

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Publication number
WO2024114004A1
WO2024114004A1 PCT/CN2023/116167 CN2023116167W WO2024114004A1 WO 2024114004 A1 WO2024114004 A1 WO 2024114004A1 CN 2023116167 W CN2023116167 W CN 2023116167W WO 2024114004 A1 WO2024114004 A1 WO 2024114004A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
stator
rotor
magnetic field
iron core
Prior art date
Application number
PCT/CN2023/116167
Other languages
French (fr)
Chinese (zh)
Inventor
刘洋
何俊明
陈文杰
章小林
王一奇
朱敏
杨晨
Original Assignee
浙江盘毂动力科技有限公司
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Publication of WO2024114004A1 publication Critical patent/WO2024114004A1/en

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Classifications

    • 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
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2798—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to the field of axial magnetic field motors, and in particular to an axial magnetic field motor and a method for suppressing eddy current losses.
  • Axial magnetic field motors also known as disc motors, have the advantages of small size, high torque density, high power density and high efficiency, and are widely used in electric vehicles, general industry and other fields.
  • the motor includes a housing, a stator and a rotor, and the stator and the rotor are arranged inside the housing.
  • the iron core, magnetic steel and other metal parts in the motor will form eddy currents when they are in a changing axial magnetic field.
  • the eddy currents can produce thermal effects and mechanical effects, which have an adverse effect on the motor. For example, eddy current losses reduce the operating efficiency of the motor and even cause high-temperature demagnetization of permanent magnets.
  • the existing measures to suppress eddy current losses most are achieved by changing the material, that is, replacing the parts that fix metal parts with non-metallic materials.
  • the application number is CN2022103256832
  • the patent name is the invention patent of disc motor, which limits the fixing frame of the stator to a non-metallic frame to avoid excessive eddy current losses in the motor.
  • it is limited to the specific environment where metal materials are used, and the above method cannot be implemented, and non-metallic materials cannot meet the better mechanical performance requirements compared to metal materials.
  • the present invention provides a method for suppressing eddy current losses and an axial magnetic field motor without changing the application of metal materials.
  • the present invention provides an axial magnetic field motor, comprising a stator and two rotors, wherein the stator comprises:
  • stator housing comprising at least one metal plate, the metal plate being provided with a plurality of core mounting holes arranged circumferentially at intervals, the metal plate being provided with a plurality of stator current interrupting slots, the stator current interrupting slots being radially connected to the core mounting holes and the edge of the metal plate;
  • a closed ring connects the edge of the metal plate to the stator interrupter gap
  • a plurality of iron cores wherein the iron cores are installed in the iron core installation holes so that both ends of the iron cores are exposed on both sides of the metal plate and the coils are sleeved on both ends;
  • a plurality of coils wherein the coils are sleeved on the iron core, and the coils are sleeved on both ends of the iron core exposed on both sides of the metal plate;
  • the two rotors are arranged on both axial sides of the metal plate, and the two ends of the iron core exposed on both sides of the metal plate are respectively maintained with the rotor air gap.
  • stator interrupter gap is connected to the outer edge of the metal plate
  • stator interrupter gap is connected to the inner edge of the metal plate
  • the closed ring connects the inner edge of the metal plate and the bearing
  • the closed ring is made of metal material
  • an insulating member is provided between the inner edge of the metal plate and the closed ring.
  • the stator housing further includes a middle partition, the number of the metal plates is two, the middle partition is spliced between the two metal plates, and the core mounting hole and the stator interrupter slot penetrate the middle partition and the two metal plates.
  • a coil accommodating cavity is provided on the side of the metal plate away from the middle partition, and the coil is held in the coil accommodating cavity.
  • it also includes a plurality of insulating layers, the outer periphery of the iron core is wrapped with at least one insulating layer, and the coil and the metal plate are arranged outside the insulating layer.
  • the axial magnetic field motor further includes a rotating shaft and at least one bearing, the rotating shaft passes through the center of the metal plate, the bearing is arranged between the rotating shaft and the metal plate, and the rotor is fixed on the rotating shaft.
  • the rotor includes a rotor disk and a plurality of magnets, wherein the plurality of magnets are arranged on the rotor disk at circumferential intervals, and the magnets are maintained with an air gap with the iron core.
  • a plurality of rotor flow-breaking slits are provided on the rotor disk, and each of the rotor flow-breaking slits is arranged along the circumferential direction;
  • the magnetic steel is formed by stacking a plurality of silicon steel sheets in radial direction, and a cut-off surface is formed between two adjacent silicon steel sheets.
  • the present invention also provides a method for suppressing eddy current losses of an axial magnetic field motor, wherein the axial magnetic field motor comprises at least one stator and at least one rotor, and the method comprises the following steps:
  • Stator interrupter slots arranged in radial direction are provided on the metal plate of the stator;
  • the rotor disk of the rotor is provided with rotor interrupting slots arranged along the circumferential direction.
  • the magnetic steel of the rotor includes a plurality of silicon steel sheets, and the method further includes:
  • a plurality of the silicon steel sheets are arranged radially to form a flow cut-off surface between two adjacent silicon steel sheets.
  • the metal plate is provided with a plurality of core mounting holes arranged circumferentially at intervals, the stator current interrupter gap is connected to the core mounting holes and the edge of the metal plate, and the method further comprises:
  • a closed ring is provided and connected to the edge of the metal plate connected to the stator interrupter gap.
  • the closed ring is added at the edge of the metal plate connected to the stator interrupting slot to avoid the problem of strength reduction of the metal plate caused by the opening of the stator interrupting slot, thereby ensuring the support capacity and strength of the metal plate.
  • the closed ring can be connected to the inner edge of the metal plate to support the bearing.
  • the closed ring is made of metal.
  • An insulating layer may also be wrapped around the outer ring of the iron core to prevent the iron core from directly contacting the metal plate, thereby isolating eddy currents.
  • the rotor interrupter gap is opened on the rotor disk to block the eddy current path of the rotor disk, and a plurality of silicon steel sheets are stacked to form a magnetic steel to form a interrupter surface between two adjacent silicon steel sheets to block the eddy current path of the magnetic steel. This not only achieves manufacturability but is also beneficial in suppressing eddy current losses.
  • FIG1 is a schematic structural diagram of the stator of the axial magnetic field motor according to the present invention.
  • FIG2 is a schematic structural diagram of a first embodiment of a metal plate according to the present invention.
  • FIG3 is a schematic structural diagram of a second embodiment of the metal plate of the present invention.
  • FIG4 is a schematic diagram of the assembly of the iron core and the insulating layer of the present invention.
  • FIG5 is a schematic diagram of the structure of the axial magnetic field motor according to the present invention.
  • FIG6 is a schematic structural diagram of the rotor disk according to the present invention.
  • FIG7 is a schematic diagram of the structure of the magnetic steel of the present invention.
  • FIG8 is a schematic diagram of an eddy current path in a stator according to the present invention.
  • FIG9 is a schematic diagram of an eddy current path in a rotor according to the present invention.
  • FIG. 10 is an exploded view of the axial magnetic field motor according to the present invention.
  • stator 1001 stator eddy current path, 110 metal plate, 1100 iron core mounting hole, 1200 stator interrupting gap, 120 closed ring, 121 pressure plate, 122 metal bearing seat, 1221 bearing end, 1222 bearing bottom, 130 iron core, 131 iron core slot, 1300 coil accommodating cavity, 140 coil, 150 insulating member, 160 insulating layer, 170 slot wedge, 200 rotor, 2001 magnetic steel eddy current path, 2002 rotor disk eddy current path, 2100 rotor interrupting gap, 210 rotor disk, 2101 magnetic steel accommodating groove, 220 magnetic steel, 221 silicon steel sheet, 2200 interrupting surface, 300 rotating shaft, 400 bearing.
  • the axial magnetic field motor stator 100 comprises:
  • stator housing 110 comprising at least one metal plate 111, the metal plate 111 being provided with a plurality of core mounting holes 1100 arranged circumferentially at intervals, the metal plate 111 being provided with a plurality of stator interrupting slots 1200, the stator interrupting slots 1200 being radially connected to the core mounting holes 1100 and the edge of the metal plate 111;
  • a closed ring 120 is provided, wherein the closed ring 120 is connected to the metal plate 111 and communicates with the edge of the stator interrupter gap 1200 .
  • a plurality of iron cores 130 wherein one iron core 130 is disposed on each of the iron core mounting holes 1100;
  • a plurality of coils 140 wherein at least one coil 140 is disposed on the outer ring of each of the iron cores 130 .
  • the stator interrupting slit 1200 on the metal plate 111 By opening the stator interrupting slit 1200 on the metal plate 111 to block the eddy current path, the eddy current loss is reduced and suppressed, thereby ensuring the reliability of the motor operation.
  • the closed ring 120 is added to avoid the problem of strength reduction of the metal plate 111 caused by the opening of the stator interrupting slit 1200, thereby ensuring the support capacity and strength of the metal plate 111. It can be seen that this embodiment achieves the purpose of suppressing eddy current loss by opening the stator interrupting slit 1200 on the metal plate 111 and sealing the edge with the closed ring 120 without changing the application of the metal material.
  • an induced electromotive force When a metal is placed in a changing magnetic field or moves in a non-uniform magnetic field, an induced electromotive force will be generated in the metal. Since the resistance of the metal is very small, even if the induced electromotive force is not very large, it can cause a strong current. This current flows along a closed loop in the metal, and the vortex in the water is therefore called an eddy current, or eddy current for short. The eddy current can produce both thermal effects and mechanical effects.
  • the existing iron core 130 is directly in contact with and connected to the metal plate 111, causing the stator eddy current path 1001 to form an elliptical loop as shown in Figure 8, wherein each of the iron cores 130 generates a stator eddy current path 1001 of a corresponding loop.
  • the stator interrupter seam 1200 arranged radially on the metal plate 111, the stator eddy current path 1001 can be blocked. Referring to Figures 2 and 8, the effect of reducing eddy current losses is achieved.
  • At least one insulating layer 160 may be wrapped around the outer ring of the iron core 130, as shown in FIG4, to prevent the iron core 130 from directly contacting the metal plate 111 to block eddy currents.
  • the insulating layer 160 may be insulating paper, and the metal plate 111 and the coil 140 are both disposed outside the insulating layer 160.
  • the metal plate 111 is annular in structure, and the stator interrupter slit 1200 can extend to communicate with the stator.
  • the inner edge of the metal plate 111 that is, the closed ring 120 is connected to the inner edge of the metal plate 111.
  • the core mounting hole 1100 is adapted to the shape of the core 130, both of which are trapezoidal, refer to Figures 2 and 4, and the trapezoidal upper bottom of the core mounting hole 1100 is set inward, and the trapezoidal lower bottom of the core mounting hole 1100 is set outward, that is, the stator interrupter slit 1200 extends and communicates with the trapezoidal upper bottom of the core mounting hole 1100 and the inner edge of the metal plate 111.
  • stator interrupting slit 1200 penetrates the metal plate 111 in the axial direction, and each of the core mounting holes 1100 is connected to a corresponding stator interrupting slit 1200, and the stator interrupting slit 1200 extends radially to block the stator eddy current path 1001 where it is located, referring to Fig. 8.
  • each of the cores 130 generates a stator eddy current path 1001, and the stator eddy current path 1001 is composed of a plurality of elliptical loop paths arranged from the inside to the outside, and the stator interrupting slit 1200 refers to a gap arranged radially and axially penetrating the metal plate 111, and the gap blocks each elliptical loop path, thereby achieving the effect of reducing eddy current loss.
  • the core 130 is provided with the core mounting hole 1100 , and air gap surfaces are formed at both axial ends of the core 130 .
  • the stator 100 is correspondingly mounted on an axial magnetic field motor with a single stator and dual rotors.
  • a cooling water channel may be provided inside the stator housing 110 to cool the iron core 130 and the coil 140.
  • the stator housing 110 may be a split structure to facilitate its processing and molding.
  • the stator housing 110 includes two metal plates 111 and a middle partition 112 , wherein the middle partition 112 is spliced between the two metal plates 111 and can be fixed by bolts.
  • the core mounting hole 1100 and the stator current interrupting gap 1200 penetrate the middle partition 112 and the two metal plates 111 .
  • the core mounting hole 1100 penetrates the two metal plates 111 and the middle plate 112 respectively, the outer side of the metal plate 111 away from the middle partition 112 forms the coil accommodating chamber 1300, the inner side of the metal plate 111 is provided with a water channel 1111, and the middle partition 112 is provided with a middle hole 1121 to connect the water channels 1111 of the two metal plates 111, so that when the middle partition 112 is spliced and fixed to the two metal plates 111, the two water channels 1111 and the middle hole 1121 are connected to form the cooling water channel, so that after the cooling medium (including cooling oil) is introduced into the cooling water channel, the core 130 installed on the core mounting 1110 and the coil 140 arranged in the coil accommodating chamber 1300 can be cooled, which is not only convenient to manufacture, but also improves the cooling effect and can increase the design space accordingly.
  • the two side plates 111 can each be provided with a water inlet 1112, which is used to introduce or discharge the cooling medium.
  • the middle partition 112 and the metal plate 111 can be fixed by glue or screws.
  • the metal plate 111 is made of metal material to ensure its support capacity, and the middle partition 112 can be made of flexible material to seal the two water channels 1111, and the two water channels 1111 are connected only through the middle hole 1121, so as to ensure that the cooling medium passes through the two water channels 1111 evenly, increase the heat exchange area, and improve the cooling performance.
  • a coil accommodating cavity 1300 is provided on one side of the metal plate 111 away from the middle partition 112, and the core mounting hole 1100 is connected to the coil accommodating cavities 1300 of the two metal plates 111, that is, the core mounting hole 1100 is Hole, so that after the iron core 130 is passed through the iron core mounting hole 1100, a coil 140 is respectively sleeved on both ends of the iron core 130, and a coil 140 is held in each coil accommodating cavity 1300, and then sealant can be injected into the coil accommodating cavity 1300 to fix the iron core 130 and the coil 140 on the metal plate 111.
  • the stator 100 further includes a plurality of slot wedges 170, and the slot wedges 170 are respectively sleeved on both axial sides of the iron core 130.
  • the coil 140 is located in the coil accommodating cavity 1300 and abuts between the slot wedges 114 and the metal plate 111 to pre-fix the coil 130. Afterwards, potting glue can be injected into the coil accommodating cavity 1300 to fix the slot wedges 170, the coil 140, the iron core 130 and the metal plate 111.
  • core slots 131 are respectively provided on both circumferential sides of the core 130 , so that each slot wedge 170 is respectively inserted into the core slots 131 of two adjacent cores 130 along the radial direction, thereby realizing the insertion of the slot wedge 170 and the core 130 .
  • the center of the metal plate 111 is connected to the rotating shaft 300 through the bearing 400, and the closed ring 120 is located at the inner edge of the metal plate 111, that is, the closed ring 120 is connected between the inner edge of the metal plate 111 and the bearing 400.
  • the closed ring 120 is used to support the bearing 400.
  • the closed ring 120 is a closed ring made of metal material to achieve better supporting capacity.
  • an insulating member 150 can be added between the closed ring 120 and the inner edge of the metal plate 111 to prevent the stator flow interrupter 1200 from contacting the closed ring 120 made of metal material, thereby destroying the flow isolation function.
  • the closed ring 120 includes a pressure plate 121 and a metal bearing seat 122.
  • the pressure plate 121 and the metal bearing seat 122 are engaged and wrapped around the inner edge of the metal plate 111, and an insulating member 150 is respectively arranged between the pressure plate 121 and the metal bearing seat 122 and the inner edge of the metal plate 111.
  • the metal bearing seat 122 includes a bearing end 1221 and a bearing bottom 1222 connected to each other, the bearing end 1221 and the pressure plate 121 are respectively connected to the two axial end surfaces of the inner edge of the metal plate 111, the bearing bottom 1222 is connected to the inner end surface of the inner edge of the metal plate 111, and the pressure plate 121 is snap-connected to the bearing bottom 1222.
  • the bearing bottom 1222 is located between the inner end surface of the inner edge of the metal plate 111 and the bearing 400, that is, the bearing 400 is connected to the inner ring of the bearing bottom 1222, refer to Figure 5.
  • the bearing end 1221 and the pressure plate 121 are used to form a coil accommodating cavity 1300.
  • the closed ring 120 is divided into the pressure plate 121 and the metal bearing seat 122, which not only facilitates the assembly and molding of the closed ring 120, but also facilitates the arrangement of the insulating member 150, that is, the insulating member 150 is arranged between the bearing end 1221, the bearing bottom 1222 and the pressure plate 121 and the inner edge of the metal plate 111, and each insulating member 150 can be annular, that is, the insulating member 150 can be a rubber ring.
  • the bearing end 1221 and the bearing bottom 1222 are both made of metal materials, and the pressure plate 121 does not directly contact the bearing 400. In addition to the metal material, it can also use high-strength non-metallic materials, such as carbon fiber or glass fiber.
  • the metal plate 111, the pressure plate 121 and the metal bearing seat 122 can be connected by rubber Water bonded fixation.
  • the closed ring 120 is added to avoid the problem of strength reduction of the metal plate 111 caused by the opening of the stator interrupting slit 1200, thereby ensuring the support capacity and strength of the metal plate 111.
  • the closed ring 120 can be connected to the inner edge of the metal plate 111 to support the bearing 400. At this time, the closed ring 120 is a closed ring 120 made of metal material.
  • an insulating member 150 between the closed ring 120 and the inner edge of the metal plate 111, the stator interrupting slit 1200 is prevented from contacting with the closed ring 120 made of metal material, thereby destroying the flow isolation function.
  • an insulating layer 160 may be wrapped around the outer ring of the iron core 130 to prevent the iron core 130 from directly contacting the metal plate 111, thereby isolating eddy currents.
  • stator current interrupting gap 1200 on the metal plate 111, sealing the edge through the closed ring 120, and providing an insulating member 150 between the metal plate 111 and the closed ring 120 made of metal, and providing an insulating layer 160 on the outer ring of the iron core 130, the stator 100 achieves the purpose of suppressing eddy current losses without changing the application of metal materials.
  • the stator 100 of the second embodiment is different from the first embodiment in that the stator interrupter gap 1200 is radially connected to the core mounting hole 1100 and the outer edge of the metal plate 111 .
  • the closed ring 120 When the stator interrupter gap 1200 extends to the outer edge of the metal plate 111, the closed ring 120 is connected to the outer edge of the metal plate 111. Since the metal plate 111 has no installation requirements, the closed ring 120 can be made of high-strength non-metallic material, and the insulating member 150 can be omitted. The closed ring 120 can be fixed to the outer edge of the metal plate 111 by glue, clamping, etc.
  • the axial magnetic field motor includes the axial magnetic field motor stator 100 of any of the above-mentioned embodiments, and the axial magnetic field motor also includes at least one rotor 200, a rotating shaft 300 and at least one bearing 400.
  • the rotating shaft 300 is passed through the center of the metal plate 111, and the bearing 400 is arranged between the rotating shaft 300 and the metal plate 111.
  • the rotor 200 is fixed on the rotating shaft 300, and the rotor 200 and the stator 100 are maintained with an air gap.
  • the beneficial effects of the axial magnetic field motor can refer to the stator 100 of the above embodiment.
  • the rotor 200 includes a rotor disk 210 and a plurality of magnetic steels 220.
  • the magnetic steel 220 is arranged on the rotor disk 210 at circumferential intervals, and the magnetic steel 220 is maintained with an air gap with the iron core 130.
  • the magnetic steel 220 slightly protrudes from the surface of the rotor disk 210 to cooperate with the iron core 130 in the air gap.
  • a circular rotor disk eddy current path 2002 and an elliptical magnetic steel eddy current path 2001 are generated on the rotor 200.
  • a rotor flow cut-off slit 2100 is provided on the rotor disk 210 to block the rotor disk eddy current path 2002, and a flow cut-off surface 2200 is formed on the magnetic steel 220 to block the magnetic steel eddy current path 2001, referring to FIG6 and FIG7 .
  • each magnetic steel 220 generates a corresponding magnetic steel eddy current path 2001, which is composed of a plurality of elliptical loop paths arranged from the inside to the outside.
  • the flow cut-off surface 2200 refers to a gap tangent to the circumference, and the gap blocks each elliptical loop path, thereby achieving the effect of reducing eddy current loss.
  • the rotor flow cut-off slit 2100 refers to a plurality of annular gaps arranged from the inside to the outside, and the gap can block the circular rotor disk eddy current path 2002.
  • the rotor disk 210 is provided with a plurality of rotor flow interrupting slits 2100 to block the eddy current path and achieve the effect of reducing eddy current loss.
  • the rotor disk eddy current path 2002 is a circular path as shown in FIG. 9 , and an eddy current path is generated on the rotor disk 210 , and the rotor flow interrupting slits 2100 arranged circumferentially can block the rotor disk eddy current path 2002 .
  • a magnetic steel receiving groove 2101 is provided on the end surface of the rotor disk 210 facing the iron core 130, and the magnetic steel 220 is positioned in the magnetic steel receiving groove 2101 and maintained with an air gap with the iron core 130.
  • the rotor flow cut-off seam 2100 can be arranged at the bottom of the magnetic steel receiving groove 2101, and a plurality of the rotor flow cut-off seams 2100 are arranged radially from the inside to the outside.
  • the depth of the rotor flow cut-off seam 2100 is less than the thickness of the rotor disk 210, for example, the depth of the rotor flow cut-off seam 2100 is 1/5 of the thickness of the rotor disk 210, and the radial width of the rotor flow cut-off seam 2100 is 1 mm, but is not limited thereto.
  • insulating glue can be injected into the rotor flow cut-off seam 2100 to suppress eddy current loss while ensuring structural strength.
  • the rotor 200 also includes a plurality of pressure plates 230.
  • a pressure plate 230 is arranged between two adjacent magnets 220.
  • the pressure plate 230 is fixed to the magnet receiving groove 2101 by fasteners, and uses an inclined surface to adapt to the circumferential side surface of the magnet 220 to perform axial and circumferential positioning of the magnet 220.
  • the magnetic steel 220 is formed by stacking a plurality of silicon steel sheets 221 radially, and a cut-off surface 2200 is formed between two adjacent silicon steel sheets 221 .
  • the cut-off surface 2200 can block the eddy current path 2001 of the magnetic steel, thereby achieving the effect of suppressing eddy current loss.
  • the magnetic steel 220 is trapezoidal, and the number thereof is consistent with the number of the iron cores 130.
  • the upper bottom of the trapezoid of the magnetic steel 220 is arranged inward, and the lower bottom of the trapezoid of the magnetic steel 220 is arranged outward. That is, the width of the plurality of silicon steel sheets 221 constituting the magnetic steel 220 increases from the inside to the outside in the radial direction.
  • the number of the stator 100 is one
  • the number of the rotor 200 is two
  • the two rotors 200 air gaps are maintained on both axial sides of the stator 100 to form an axial magnetic field motor with a single stator and two rotors.
  • an axial magnetic field motor with a single stator and a single rotor, or a double stator and a single rotor can be obtained.
  • the rotor interrupter gap 2100 is opened on the rotor disk 210 to block the rotor disk eddy current path 2002, and a plurality of silicon steel sheets 221 are stacked to form the magnetic steel 220 to form a interrupter surface 2200 between two adjacent silicon steel sheets 221 to block the magnetic steel eddy current path 2001, which not only achieves manufacturability but also helps to suppress eddy current losses.
  • the eddy current loss suppression method of the axial magnetic field motor includes at least one stator 100 and at least one rotor 200, and the method includes the following steps:
  • Stator interrupter slots 1200 arranged in radial direction are provided on the metal plate 111 of the stator 100;
  • the rotor disk 210 of the rotor 200 is provided with rotor interrupter slots 2100 arranged along the circumferential direction.
  • the stator interrupting slit 1200 axially penetrates the metal plate 111, and the depth of the rotor interrupting slit 2100 is less than the thickness of the rotor disk 210.
  • the stator interrupting slit 1200 can block the stator eddy current path 1001, refer to FIG8, and the rotor interrupting slit 2100 can block the rotor disk eddy current path 2002, refer to FIG9, so as to effectively suppress the eddy current loss of the motor, and the stator interrupting slit 1200 and the rotor interrupting slit 2100 can be processed by a tool to achieve the effect of manufacturability.
  • the magnetic steel 220 of the rotor 200 includes a plurality of silicon steel sheets 221 , and the method further includes:
  • silicon steel sheets 221 are arranged radially to form a cut-off surface 2200 between two adjacent silicon steel sheets 221.
  • the cut-off surface 2200 can block the magnetic steel eddy current path 2001. Referring to FIG. 9, the integrity of the silicon steel sheet 221 is ensured while achieving manufacturability.
  • the metal plate 111 is provided with a plurality of circumferentially spaced core mounting holes 1100
  • the stator current interrupter 1200 is connected to the core mounting holes 1100 and the edge of the metal plate 111 , and the method further includes:
  • a closed ring 120 is provided, and the closed ring 120 is connected to the edge of the metal plate 111 connected to the stator interrupter gap 1200 .
  • the stator interrupter gap 1200 can extend and connect to the inner and outer edges of the metal plate 111, and the closed ring 120 is correspondingly installed on the inner and outer edges of the metal plate 111 to avoid the stator interrupter gap 1200 affecting the strength of the metal plate 111. It can be seen that the above structure can ensure the structural strength of the metal plate 111 while suppressing eddy current losses.
  • stator interrupter gap 1200 on the metal plate 111 opening the stator interrupter gap 1200 on the metal plate 111, opening the rotor interrupter gap 2100 on the rotor disk 210, and forming the interrupter surface 2200 on the magnetic steel 220, not only the molding is convenient, but also the eddy current loss is effectively suppressed, thereby ensuring the reliability and stability of the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The present invention provides an axial flux motor and an eddy current loss suppression method. The axial flux motor comprises: a stator and two rotors, wherein the stator comprises a stator housing, the stator housing comprises at least one metal plate, a plurality of iron core mounting holes circumferentially arranged at intervals are formed in the metal plate, a plurality of stator cut-off seams are formed in the metal plate, and the stator cut-off seams are communicated with the iron core mounting holes and the edge of the metal plate along the radial direction; a closed ring connected to the edge of the metal plate communicated with the stator cut-off seams; a plurality of iron cores, the iron cores being mounted in the iron core mounting holes, and coils being sleeved on two ends of each iron core exposed on two sides of the metal plate; and a plurality of coils, the coils being sleeved on the iron cores, and the coils being sleeved on two ends of each iron core exposed on two sides of the metal plate, wherein the two rotors are arranged on two axial sides of the metal plate, and the two ends of each iron core exposed on two sides of the metal plate are respectively kept in air gaps with the rotors. The purpose of suppressing eddy current loss is achieved on the premise that a use of a metal material of a stator is not changed.

Description

一种向磁场电机及涡流损耗抑制方法A magnetic field motor and eddy current loss suppression method 技术领域Technical Field
本发明涉及轴向磁场电机领域，尤其涉及一种轴向磁场电机及涡流损耗抑制方法。The present invention relates to the field of axial magnetic field motors, and in particular to an axial magnetic field motor and a method for suppressing eddy current losses.
背景技术Background technique
轴向磁场电机又称盘式电机，具有体积小、高转矩密度、高功率密度和高效率等优点，被广泛应用于电动汽车、通用工业等领域。电机包括机壳、定子和转子，定子和转子布置于机壳内部。电机中的铁芯、磁钢等金属零部件，其在处于变化轴向磁场中会形成涡流，涡流即可产生热效应，也可引起机械效应，对电机产生不利影响，例如涡流损耗降低电机的运行效率，甚至造成永磁体等高温退磁。Axial magnetic field motors, also known as disc motors, have the advantages of small size, high torque density, high power density and high efficiency, and are widely used in electric vehicles, general industry and other fields. The motor includes a housing, a stator and a rotor, and the stator and the rotor are arranged inside the housing. The iron core, magnetic steel and other metal parts in the motor will form eddy currents when they are in a changing axial magnetic field. The eddy currents can produce thermal effects and mechanical effects, which have an adverse effect on the motor. For example, eddy current losses reduce the operating efficiency of the motor and even cause high-temperature demagnetization of permanent magnets.
现有抑制涡流损耗的措施中，多数采用改变材质实现，即将固定金属零部件的部件，由金属材质替代为非金属材料。例如申请号为CN2022103256832，专利名称为盘式电机的发明专利，其将定子中固定铁芯的固定架限定为非金属架，以避免电机产生过大的涡流损耗。但是仅限金属材料应用的特定环境，上述方式无法实施，并且非金属材料相对金属材料来说，达不到较好的机械性能要求。Among the existing measures to suppress eddy current losses, most are achieved by changing the material, that is, replacing the parts that fix metal parts with non-metallic materials. For example, the application number is CN2022103256832, and the patent name is the invention patent of disc motor, which limits the fixing frame of the stator to a non-metallic frame to avoid excessive eddy current losses in the motor. However, it is limited to the specific environment where metal materials are used, and the above method cannot be implemented, and non-metallic materials cannot meet the better mechanical performance requirements compared to metal materials.
发明内容Summary of the invention
为了解决上述问题，本发明提供了一种在不改变金属材料的应用的前提下，提供一种涡流损耗抑制方法及轴向磁场电机。In order to solve the above problems, the present invention provides a method for suppressing eddy current losses and an axial magnetic field motor without changing the application of metal materials.
依据本发明的一个目的，本发明提供了一种轴向磁场电机，包括一定子和两转子，所述定子包括：According to one object of the present invention, the present invention provides an axial magnetic field motor, comprising a stator and two rotors, wherein the stator comprises:
一定子机壳，所述定子机壳包括至少一金属板，所述金属板上设置有若干个圆周间隔排列的铁芯安装孔，所述金属板上开设有若干个定子断流缝，所述定子断流缝沿径向连通于所述铁芯安装孔和所述金属板的边缘；A stator housing, the stator housing comprising at least one metal plate, the metal plate being provided with a plurality of core mounting holes arranged circumferentially at intervals, the metal plate being provided with a plurality of stator current interrupting slots, the stator current interrupting slots being radially connected to the core mounting holes and the edge of the metal plate;
一封闭环，所述封闭环连接所述金属板连通所述定子断流缝的边缘；A closed ring, the closed ring connects the edge of the metal plate to the stator interrupter gap;
若干铁芯，所述铁芯安装在所述铁芯安装孔内并使所述铁芯的两端暴露在所述金属板两侧的两端上均套设有所述线圈；A plurality of iron cores, wherein the iron cores are installed in the iron core installation holes so that both ends of the iron cores are exposed on both sides of the metal plate and the coils are sleeved on both ends;
若干线圈，所述线圈套设在所述铁芯上，所述铁芯暴露在所述金属板两侧的两端上均套设有所述线圈； A plurality of coils, wherein the coils are sleeved on the iron core, and the coils are sleeved on both ends of the iron core exposed on both sides of the metal plate;
两所述转子设置于所述金属板的轴向两侧，所述铁芯暴露在所述金属板两侧的两端分别与所述转子气隙保持。The two rotors are arranged on both axial sides of the metal plate, and the two ends of the iron core exposed on both sides of the metal plate are respectively maintained with the rotor air gap.
作为优选的实施例，所述定子断流缝连通至所述金属板的外边缘；As a preferred embodiment, the stator interrupter gap is connected to the outer edge of the metal plate;
或者，所述定子断流缝连通至所述金属板的内边缘，所述封闭环连接所述金属板的内边缘和轴承，所述封闭环为金属材质制成的封闭环，并且所述金属板的内边缘和所述封闭环之间设置有绝缘件。Alternatively, the stator interrupter gap is connected to the inner edge of the metal plate, the closed ring connects the inner edge of the metal plate and the bearing, the closed ring is made of metal material, and an insulating member is provided between the inner edge of the metal plate and the closed ring.
作为优选的实施例，所述定子机壳还包括一中间隔板，所述金属板的数量为两个，所述中间隔板拼接于两所述金属板之间，并且所述铁芯安装孔和所述定子断流缝贯穿所述中间隔板和两所述金属板。As a preferred embodiment, the stator housing further includes a middle partition, the number of the metal plates is two, the middle partition is spliced between the two metal plates, and the core mounting hole and the stator interrupter slot penetrate the middle partition and the two metal plates.
作为优选的实施例，所述金属板背离所述中间隔板的一侧设置线圈容置腔，所述线圈保持于所述线圈容置腔内。作为优选的实施例，还包括若干绝缘层，所述铁芯的外周包裹至少一绝缘层，所述线圈和所述金属板设置于所述绝缘层外部。As a preferred embodiment, a coil accommodating cavity is provided on the side of the metal plate away from the middle partition, and the coil is held in the coil accommodating cavity. As a preferred embodiment, it also includes a plurality of insulating layers, the outer periphery of the iron core is wrapped with at least one insulating layer, and the coil and the metal plate are arranged outside the insulating layer.
作为优选的实施例，，所述轴向磁场电机还包括一转轴和至少一轴承，所述转轴穿设于所述金属板的中心，所述转轴和所述金属板之间设置有所述轴承，所述转子固定于所述转轴上。As a preferred embodiment, the axial magnetic field motor further includes a rotating shaft and at least one bearing, the rotating shaft passes through the center of the metal plate, the bearing is arranged between the rotating shaft and the metal plate, and the rotor is fixed on the rotating shaft.
作为优选的实施例，所述转子包括一转子盘和若干个磁钢，若干个所述磁钢呈圆周间隔设置于所述转子盘上，所述磁钢与所述铁芯气隙地保持。As a preferred embodiment, the rotor includes a rotor disk and a plurality of magnets, wherein the plurality of magnets are arranged on the rotor disk at circumferential intervals, and the magnets are maintained with an air gap with the iron core.
作为优选的实施例，所述转子盘上开设有若干个转子断流缝，每一所述转子断流缝沿周向设置；As a preferred embodiment, a plurality of rotor flow-breaking slits are provided on the rotor disk, and each of the rotor flow-breaking slits is arranged along the circumferential direction;
和/或，所述磁钢由若干个硅钢片沿径向堆叠而成，相邻的两个所述硅钢片之间形成断流面。And/or, the magnetic steel is formed by stacking a plurality of silicon steel sheets in radial direction, and a cut-off surface is formed between two adjacent silicon steel sheets.
依据本发明的另一个目的，本发明还提供了一种轴向磁场电机的涡流损耗抑制方法，所述轴向磁场电机包括至少一定子和至少一转子，所述方法包括以下步骤：According to another object of the present invention, the present invention also provides a method for suppressing eddy current losses of an axial magnetic field motor, wherein the axial magnetic field motor comprises at least one stator and at least one rotor, and the method comprises the following steps:
在所述定子的金属板上开设沿径向排列的定子断流缝；Stator interrupter slots arranged in radial direction are provided on the metal plate of the stator;
在所述转子的转子盘上开设沿周向排列的转子断流缝。The rotor disk of the rotor is provided with rotor interrupting slots arranged along the circumferential direction.
作为优选的实施例，所述转子的磁钢包括若干个硅钢片，所述方法还包括：As a preferred embodiment, the magnetic steel of the rotor includes a plurality of silicon steel sheets, and the method further includes:
将若干个所述硅钢片沿径向排列，以在相邻的两所述硅钢片之间形成断流面。A plurality of the silicon steel sheets are arranged radially to form a flow cut-off surface between two adjacent silicon steel sheets.
作为优选的实施例，所述金属板上设置有若干个圆周间隔排列的铁芯安装孔，所述定子断流缝连通于所述铁芯安装孔和所述金属板的边缘，所述方法还包括：As a preferred embodiment, the metal plate is provided with a plurality of core mounting holes arranged circumferentially at intervals, the stator current interrupter gap is connected to the core mounting holes and the edge of the metal plate, and the method further comprises:
提供一封闭环，将所述封闭环连接于所述金属板连通所述定子断流缝的边缘。A closed ring is provided and connected to the edge of the metal plate connected to the stator interrupter gap.
与现有技术相比，本技术方案具有以下优点： Compared with the prior art, this technical solution has the following advantages:
通过在所述金属板上开设所述定子断流缝，以阻断涡流路径，降低且抑制涡流损耗，从而保证电机运行的可靠性。另外在所述金属板连通所述定子断流缝的边缘处，增设所述封闭环，以避免所述金属板因开设所述定子断流缝而引发的强度下降的问题，从而保证所述金属板的支撑能力和强度。By opening the stator interrupting slot on the metal plate, the eddy current path is blocked, the eddy current loss is reduced and suppressed, and thus the reliability of the motor operation is ensured. In addition, the closed ring is added at the edge of the metal plate connected to the stator interrupting slot to avoid the problem of strength reduction of the metal plate caused by the opening of the stator interrupting slot, thereby ensuring the support capacity and strength of the metal plate.
所述封闭环可连接于所述金属板的内边缘，以用于支撑轴承，此时所述封闭环为金属材质制成的封闭环，通过在所述封闭环和所述金属板的内边缘之间增设绝缘件，避免所述定子断流缝1200与金属材质的所述封闭环接触，而破坏隔流作用。The closed ring can be connected to the inner edge of the metal plate to support the bearing. In this case, the closed ring is made of metal. By adding an insulating part between the closed ring and the inner edge of the metal plate, the stator flow-breaking gap 1200 is prevented from contacting the closed ring made of metal and destroying the flow-isolating effect.
还可在所述铁芯外圈包裹绝缘层，以避免所述铁芯与所述金属板直接接触，可隔断涡流。An insulating layer may also be wrapped around the outer ring of the iron core to prevent the iron core from directly contacting the metal plate, thereby isolating eddy currents.
利用在所述转子盘上开设所述转子断流缝，以阻断转子盘涡流路径，以及利用若干个硅钢片堆叠形成磁钢，以在相邻的两个所述硅钢片之间形成断流面，以阻断磁钢涡流路径，不仅实现可制造性，并且有益于抑制涡流损耗。The rotor interrupter gap is opened on the rotor disk to block the eddy current path of the rotor disk, and a plurality of silicon steel sheets are stacked to form a magnetic steel to form a interrupter surface between two adjacent silicon steel sheets to block the eddy current path of the magnetic steel. This not only achieves manufacturability but is also beneficial in suppressing eddy current losses.
以下结合附图及实施例进一步说明本发明。The present invention is further described below with reference to the accompanying drawings and embodiments.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明所述轴向磁场电机定子的结构示意图；FIG1 is a schematic structural diagram of the stator of the axial magnetic field motor according to the present invention;
图2为本发明所述金属板第一实施例的结构示意图；FIG2 is a schematic structural diagram of a first embodiment of a metal plate according to the present invention;
图3为本发明所述金属板第二实施例的结构示意图；FIG3 is a schematic structural diagram of a second embodiment of the metal plate of the present invention;
图4为本发明所述铁芯与绝缘层的组装示意图；FIG4 is a schematic diagram of the assembly of the iron core and the insulating layer of the present invention;
图5为本发明所述轴向磁场电机的结构示意图；FIG5 is a schematic diagram of the structure of the axial magnetic field motor according to the present invention;
图6为本发明所述转子盘的结构示意图；FIG6 is a schematic structural diagram of the rotor disk according to the present invention;
图7为本发明所述磁钢的结构示意图；FIG7 is a schematic diagram of the structure of the magnetic steel of the present invention;
图8为本发明所述定子中涡流路径的示意图；FIG8 is a schematic diagram of an eddy current path in a stator according to the present invention;
图9为本发明所述转子中涡流路径的示意图；FIG9 is a schematic diagram of an eddy current path in a rotor according to the present invention;
图10为本发明所述轴向磁场电机的分解图。FIG. 10 is an exploded view of the axial magnetic field motor according to the present invention.
图中：100定子、1001定子涡流路径、110金属板、1100铁芯安装孔、1200定子断流缝、120封闭环、121压板、122金属轴承座、1221轴承端部、1222轴承底部、130铁芯、131铁芯插槽、1300线圈容置腔、140线圈、150绝缘件、160绝缘层、170槽楔、200转子、2001磁钢涡流路径、2002转子盘涡流路径、2100转子断流缝、210转子盘、2101磁钢容置槽、220磁钢、221硅钢片、2200断流面、300转轴、400轴承。 In the figure: 100 stator, 1001 stator eddy current path, 110 metal plate, 1100 iron core mounting hole, 1200 stator interrupting gap, 120 closed ring, 121 pressure plate, 122 metal bearing seat, 1221 bearing end, 1222 bearing bottom, 130 iron core, 131 iron core slot, 1300 coil accommodating cavity, 140 coil, 150 insulating member, 160 insulating layer, 170 slot wedge, 200 rotor, 2001 magnetic steel eddy current path, 2002 rotor disk eddy current path, 2100 rotor interrupting gap, 210 rotor disk, 2101 magnetic steel accommodating groove, 220 magnetic steel, 221 silicon steel sheet, 2200 interrupting surface, 300 rotating shaft, 400 bearing.
具体实施方式Detailed ways
以下描述用于揭露本发明以使本领域技术人员能够实现本发明。以下描述中的优选实施例只作为举例，本领域技术人员可以想到其他显而易见的变型。在以下描述中界定的本发明的基本原理可以应用于其他实施方案、变形方案、改进方案、等同方案以及没有背离本发明的精神和范围的其他技术方案。The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.
第一实施例First embodiment
如图1和图2所示，所述轴向磁场电机定子100，包括：As shown in FIG. 1 and FIG. 2 , the axial magnetic field motor stator 100 comprises:
一定子机壳110，所述定子机壳110包括至少一金属板111，所述金属板111上设置有若干个圆周间隔排列的铁芯安装孔1100，所述金属板111上开设有若干个定子断流缝1200，所述定子断流缝1200沿径向连通于所述铁芯安装孔1100和所述金属板111的边缘；A stator housing 110, the stator housing 110 comprising at least one metal plate 111, the metal plate 111 being provided with a plurality of core mounting holes 1100 arranged circumferentially at intervals, the metal plate 111 being provided with a plurality of stator interrupting slots 1200, the stator interrupting slots 1200 being radially connected to the core mounting holes 1100 and the edge of the metal plate 111;
一封闭环120，所述封闭环120连接所述金属板111连通所述定子断流缝1200的边缘。A closed ring 120 is provided, wherein the closed ring 120 is connected to the metal plate 111 and communicates with the edge of the stator interrupter gap 1200 .
若干铁芯130，每一所述铁芯安装孔1100上分别设置一所述铁芯130；A plurality of iron cores 130, wherein one iron core 130 is disposed on each of the iron core mounting holes 1100;
若干线圈140，每一所述铁芯130外圈设置有至少一所述线圈140。A plurality of coils 140 , wherein at least one coil 140 is disposed on the outer ring of each of the iron cores 130 .
通过在所述金属板111上开设所述定子断流缝1200，以阻断涡流路径，以降低且抑制涡流损耗，从而保证电机运行的可靠性。另外在所述金属板111连通所述定子断流缝1200的边缘处，增设所述封闭环120，以避免所述金属板111因开设所述定子断流缝1200而引发的强度下降的问题，从而保证所述金属板111的支撑能力和强度。可见本实施例通过在所述金属板111上开设所述定子断流缝1200，以及通过所述封闭环120封边，达到所述定子机壳110在不改变金属材料的应用的前提下，实现抑制涡流损耗的目的。By opening the stator interrupting slit 1200 on the metal plate 111 to block the eddy current path, the eddy current loss is reduced and suppressed, thereby ensuring the reliability of the motor operation. In addition, at the edge of the metal plate 111 connected to the stator interrupting slit 1200, the closed ring 120 is added to avoid the problem of strength reduction of the metal plate 111 caused by the opening of the stator interrupting slit 1200, thereby ensuring the support capacity and strength of the metal plate 111. It can be seen that this embodiment achieves the purpose of suppressing eddy current loss by opening the stator interrupting slit 1200 on the metal plate 111 and sealing the edge with the closed ring 120 without changing the application of the metal material.
金属被放入变化的磁场中，或在非均匀的磁场中运动，则在该金属内要产生感应电动势，由于金属的电阻很小，因而即使感应电动势不很大，也能引起强大的电流，这种电流在金属内沿着一个一个闭合回路流动，很水中的旋涡因此被称为涡旋电流，简称涡流，涡流即可产生热效应，也可引起机械效应。现有的所述铁芯130是直接接触并连接于所述金属板111上，造成定子涡流路径1001形成如图8所示的椭圆形回路，其中每个所述铁芯130分别产生相应回路的定子涡流路径1001。而通过在所述金属板111上开设沿径向布置的所述定子断流缝1200，能够阻断定子涡流路径1001，参考图2和图8，达到降低涡流损耗的效果。When a metal is placed in a changing magnetic field or moves in a non-uniform magnetic field, an induced electromotive force will be generated in the metal. Since the resistance of the metal is very small, even if the induced electromotive force is not very large, it can cause a strong current. This current flows along a closed loop in the metal, and the vortex in the water is therefore called an eddy current, or eddy current for short. The eddy current can produce both thermal effects and mechanical effects. The existing iron core 130 is directly in contact with and connected to the metal plate 111, causing the stator eddy current path 1001 to form an elliptical loop as shown in Figure 8, wherein each of the iron cores 130 generates a stator eddy current path 1001 of a corresponding loop. By providing the stator interrupter seam 1200 arranged radially on the metal plate 111, the stator eddy current path 1001 can be blocked. Referring to Figures 2 and 8, the effect of reducing eddy current losses is achieved.
此外还可在所述铁芯130外圈包裹至少一绝缘层160，参考图4，以避免所述铁芯130直接与所述金属板111接触，以隔断涡流。所述绝缘层160可以为绝缘纸，所述金属板111和所述线圈140均设置在所述绝缘层160的外部。In addition, at least one insulating layer 160 may be wrapped around the outer ring of the iron core 130, as shown in FIG4, to prevent the iron core 130 from directly contacting the metal plate 111 to block eddy currents. The insulating layer 160 may be insulating paper, and the metal plate 111 and the coil 140 are both disposed outside the insulating layer 160.
如图1和图2所示，所述金属板111呈环形结构，所述定子断流缝1200可延伸连通至所 述金属板111的内边缘，即所述封闭环120连接于所述金属板111的内边缘。其中所述铁芯安装孔1100与所述铁芯130的形状相适配，两者均呈梯形，参考图2和图4，并且所述铁芯安装孔1100的梯形上底朝内设置，所述铁芯安装孔1100的梯形下底朝外设置，即所述定子断流缝1200延伸连通于所述铁芯安装孔1100的梯形上底，及所述金属板111的内边缘。As shown in FIG. 1 and FIG. 2 , the metal plate 111 is annular in structure, and the stator interrupter slit 1200 can extend to communicate with the stator. The inner edge of the metal plate 111, that is, the closed ring 120 is connected to the inner edge of the metal plate 111. The core mounting hole 1100 is adapted to the shape of the core 130, both of which are trapezoidal, refer to Figures 2 and 4, and the trapezoidal upper bottom of the core mounting hole 1100 is set inward, and the trapezoidal lower bottom of the core mounting hole 1100 is set outward, that is, the stator interrupter slit 1200 extends and communicates with the trapezoidal upper bottom of the core mounting hole 1100 and the inner edge of the metal plate 111.
参考图2，所述定子断流缝1200是沿轴向贯穿所述金属板111的，并且每个所述铁芯安装孔1100分别对应连通一所述定子断流缝1200，所述定子断流缝1200沿径向延伸，以阻断其所在的定子涡流路径1001，参考图8。进一步说明，每个所述铁芯130分别产生定子涡流路径1001，所述定子涡流路径1001由内至外排列的多个椭圆形回路路径组成，所述定子断流缝1200指的是沿径向设置，且沿轴向贯穿所述金属板111的缝隙，而该缝隙阻断各椭圆形回路路径，进而达到降低涡流损耗的效果。Referring to Fig. 2, the stator interrupting slit 1200 penetrates the metal plate 111 in the axial direction, and each of the core mounting holes 1100 is connected to a corresponding stator interrupting slit 1200, and the stator interrupting slit 1200 extends radially to block the stator eddy current path 1001 where it is located, referring to Fig. 8. Further explanation, each of the cores 130 generates a stator eddy current path 1001, and the stator eddy current path 1001 is composed of a plurality of elliptical loop paths arranged from the inside to the outside, and the stator interrupting slit 1200 refers to a gap arranged radially and axially penetrating the metal plate 111, and the gap blocks each elliptical loop path, thereby achieving the effect of reducing eddy current loss.
如图1和图2所示，所述铁芯130穿设所述铁芯安装孔1100，且所述铁芯130的轴向两端分别形成气隙面，此时所述定子100对应安装于单定子双转子的轴向磁场电机。As shown in FIG. 1 and FIG. 2 , the core 130 is provided with the core mounting hole 1100 , and air gap surfaces are formed at both axial ends of the core 130 . At this time, the stator 100 is correspondingly mounted on an axial magnetic field motor with a single stator and dual rotors.
如图10所示，所述定子机壳110内部可设置冷却水道，以对所述铁芯130和所述线圈140进行冷却。其中所述定子机壳110可为分体结构，以便其加工成型制造。As shown in Fig. 10, a cooling water channel may be provided inside the stator housing 110 to cool the iron core 130 and the coil 140. The stator housing 110 may be a split structure to facilitate its processing and molding.
例如所述定子机壳110包括两金属板111和一中间隔板112，所述中间隔板112拼接于两所述金属板111之间，并可通过螺栓固定。并且所述铁芯安装孔1100和所述定子断流缝1200贯穿所述中间隔板112和两所述金属板111。其中所述铁芯安装孔1100分别贯穿两所述金属板111和所述中间板112，所述金属板111背离所述中间隔板112的外侧面形成所述线圈容置腔1300，所述金属板111的内侧面设置有水道1111，所述中间隔板112上开设有中间孔1121，以连通两所述金属板111的水道1111，这样当所述中间隔板112拼接固定于两所述金属板111后，两所述水道1111和所述中间孔1121连通形成所述冷却水道，以在冷却介质(包括冷却油)引入冷却水道后，能够对安装在所述铁芯安装1110上的铁芯130，以及布置在所述线圈容置腔1300内的线圈140进行冷却，不仅制造方便，而且提升冷却效果，还可相应增加设计空间。另外两所述侧板111可各设置进水口1112，分别用于引入或排出冷却介质。For example, the stator housing 110 includes two metal plates 111 and a middle partition 112 , wherein the middle partition 112 is spliced between the two metal plates 111 and can be fixed by bolts. The core mounting hole 1100 and the stator current interrupting gap 1200 penetrate the middle partition 112 and the two metal plates 111 . The core mounting hole 1100 penetrates the two metal plates 111 and the middle plate 112 respectively, the outer side of the metal plate 111 away from the middle partition 112 forms the coil accommodating chamber 1300, the inner side of the metal plate 111 is provided with a water channel 1111, and the middle partition 112 is provided with a middle hole 1121 to connect the water channels 1111 of the two metal plates 111, so that when the middle partition 112 is spliced and fixed to the two metal plates 111, the two water channels 1111 and the middle hole 1121 are connected to form the cooling water channel, so that after the cooling medium (including cooling oil) is introduced into the cooling water channel, the core 130 installed on the core mounting 1110 and the coil 140 arranged in the coil accommodating chamber 1300 can be cooled, which is not only convenient to manufacture, but also improves the cooling effect and can increase the design space accordingly. In addition, the two side plates 111 can each be provided with a water inlet 1112, which is used to introduce or discharge the cooling medium.
所述中间隔板112和所述金属板111之间可采用胶水粘结固定，当然也可利用螺钉固定。所述金属板111通过采用金属材质，保证其支撑能力，而所述中间隔板112可采用柔性材料，对两所述水道1111密封，并且使两所述水道1111仅通过所述中间孔1121连通，保证冷却介质均匀的通过两所述水道1111，增加换热面积，提升冷却性能。The middle partition 112 and the metal plate 111 can be fixed by glue or screws. The metal plate 111 is made of metal material to ensure its support capacity, and the middle partition 112 can be made of flexible material to seal the two water channels 1111, and the two water channels 1111 are connected only through the middle hole 1121, so as to ensure that the cooling medium passes through the two water channels 1111 evenly, increase the heat exchange area, and improve the cooling performance.
具体地，所述金属板111背离所述中间隔板112的一侧设置有一线圈容置腔1300，所述铁芯安装孔1100连通两所述金属板111的所述线圈容置腔1300，即所述铁芯安装孔1100为 孔，以在所述铁芯130穿设于所述铁芯安装孔1100后，所述铁芯130的两端分别套设一所述线圈140，并且每一所述线圈容置腔1300内保持一所述线圈140，之后可向所述线圈容置腔1300内注入密封胶，以使所述铁芯130、所述线圈140固定于所述金属板111上。Specifically, a coil accommodating cavity 1300 is provided on one side of the metal plate 111 away from the middle partition 112, and the core mounting hole 1100 is connected to the coil accommodating cavities 1300 of the two metal plates 111, that is, the core mounting hole 1100 is Hole, so that after the iron core 130 is passed through the iron core mounting hole 1100, a coil 140 is respectively sleeved on both ends of the iron core 130, and a coil 140 is held in each coil accommodating cavity 1300, and then sealant can be injected into the coil accommodating cavity 1300 to fix the iron core 130 and the coil 140 on the metal plate 111.
参考图10，所述定子100还包括若干个槽楔170，所述铁芯130的轴向两侧分别套设有所述槽楔170，所述线圈140位于所述线圈容置腔1300内，且抵接于所述槽楔114和所述金属板111之间，以对所述线圈130进行预固定。之后可向所述线圈容置腔1300内注入灌封胶，使所述槽楔170、所述线圈140、所述铁芯130和所述金属板111固定。Referring to FIG. 10 , the stator 100 further includes a plurality of slot wedges 170, and the slot wedges 170 are respectively sleeved on both axial sides of the iron core 130. The coil 140 is located in the coil accommodating cavity 1300 and abuts between the slot wedges 114 and the metal plate 111 to pre-fix the coil 130. Afterwards, potting glue can be injected into the coil accommodating cavity 1300 to fix the slot wedges 170, the coil 140, the iron core 130 and the metal plate 111.
继续参考图10，所述铁芯130的周向两侧分别设置有铁芯插槽131，以使每一所述槽楔170分别沿径向，且插接于相邻两个所述铁芯130的所述铁芯插槽131内，实现所述槽楔170与所述铁芯130的插接。Continuing to refer to FIG. 10 , core slots 131 are respectively provided on both circumferential sides of the core 130 , so that each slot wedge 170 is respectively inserted into the core slots 131 of two adjacent cores 130 along the radial direction, thereby realizing the insertion of the slot wedge 170 and the core 130 .
参考图5，所述金属板111的中心通过轴承400连接转轴300，而所述封闭环120位于所述金属板111内边缘，即所述封闭环120连接于所述金属板111内边缘和所述轴承400之间，所述封闭环120用于支撑所述轴承400，此时所述封闭环120为金属材质制成的封闭环，以达到较优的支撑能力，此时可在所述封闭环120和所述金属板111内边缘之间增设绝缘件150，避免所述定子断流缝1200与金属材质的所述封闭环120接触，而破坏隔流作用。Referring to Figure 5, the center of the metal plate 111 is connected to the rotating shaft 300 through the bearing 400, and the closed ring 120 is located at the inner edge of the metal plate 111, that is, the closed ring 120 is connected between the inner edge of the metal plate 111 and the bearing 400. The closed ring 120 is used to support the bearing 400. At this time, the closed ring 120 is a closed ring made of metal material to achieve better supporting capacity. At this time, an insulating member 150 can be added between the closed ring 120 and the inner edge of the metal plate 111 to prevent the stator flow interrupter 1200 from contacting the closed ring 120 made of metal material, thereby destroying the flow isolation function.
如图1所示，所述封闭环120包括一压板121和一金属轴承座122，所述压板121和所述金属轴承座122卡合，并包裹于所述金属板111的内边缘，并且所述压板121和所述金属轴承座122分别与所述金属板111的内边缘之间设置有绝缘件150。As shown in Figure 1, the closed ring 120 includes a pressure plate 121 and a metal bearing seat 122. The pressure plate 121 and the metal bearing seat 122 are engaged and wrapped around the inner edge of the metal plate 111, and an insulating member 150 is respectively arranged between the pressure plate 121 and the metal bearing seat 122 and the inner edge of the metal plate 111.
具体地，所述金属轴承座122包括相接的一轴承端部1221和一轴承底部1222，所述轴承端部1221和所述压板121分别连接于所述金属板111内边缘的轴向两端面，所述轴承底部1222连接于所述金属板111内边缘的内端面，并且所述压板121卡合连接于所述轴承底部1222。此时所述轴承底部1222位于所述金属板111内边缘的内端面，及所述轴承400之间，即所述轴承400连接于所述轴承底部1222的内圈，参考图5。Specifically, the metal bearing seat 122 includes a bearing end 1221 and a bearing bottom 1222 connected to each other, the bearing end 1221 and the pressure plate 121 are respectively connected to the two axial end surfaces of the inner edge of the metal plate 111, the bearing bottom 1222 is connected to the inner end surface of the inner edge of the metal plate 111, and the pressure plate 121 is snap-connected to the bearing bottom 1222. At this time, the bearing bottom 1222 is located between the inner end surface of the inner edge of the metal plate 111 and the bearing 400, that is, the bearing 400 is connected to the inner ring of the bearing bottom 1222, refer to Figure 5.
所述轴承端部1221和所述压板121的作用用于形成线圈容置腔1300，所述封闭环120分为所述压板121和所述金属轴承座122，不仅便于所述封闭环120的组装成型，以及便于所述绝缘件150的布置，即所述轴承端部1221、轴承底部1222和所述压板121分别与所述金属板111的内边缘之间，均设置有所述绝缘件150，各所述绝缘件150可呈环形，即所述绝缘件150可以为橡胶环。所述轴承端部1221和轴承底部1222均为金属材质制成，而所述压板121没有直接接触所述轴承400，其除了采用所述金属材质外，还可采用高强度非金属材质，例如碳纤维或玻璃纤维等。另外所述金属板111、所述压板121和所述金属轴承座122之间可通过胶 水粘结固定。The bearing end 1221 and the pressure plate 121 are used to form a coil accommodating cavity 1300. The closed ring 120 is divided into the pressure plate 121 and the metal bearing seat 122, which not only facilitates the assembly and molding of the closed ring 120, but also facilitates the arrangement of the insulating member 150, that is, the insulating member 150 is arranged between the bearing end 1221, the bearing bottom 1222 and the pressure plate 121 and the inner edge of the metal plate 111, and each insulating member 150 can be annular, that is, the insulating member 150 can be a rubber ring. The bearing end 1221 and the bearing bottom 1222 are both made of metal materials, and the pressure plate 121 does not directly contact the bearing 400. In addition to the metal material, it can also use high-strength non-metallic materials, such as carbon fiber or glass fiber. In addition, the metal plate 111, the pressure plate 121 and the metal bearing seat 122 can be connected by rubber Water bonded fixation.
综上所述，通过在所述金属板111上开设所述定子断流缝1200，以阻断涡流路径，降低且抑制涡流损耗，从而保证电机运行的可靠性。另外在所述金属板111连通所述定子断流缝1200的边缘处，增设所述封闭环120，以避免所述金属板111因开设所述定子断流缝1200而引发的强度下降的问题，从而保证所述金属板111的支撑能力和强度。所述封闭环120可连接于所述金属板111的内边缘，以用于支撑轴承400，此时所述封闭环120为金属材质制成的封闭环120，通过在所述封闭环120和所述金属板111的内边缘之间增设绝缘件150，避免所述定子断流缝1200与金属材质的所述封闭环120接触，而破坏隔流作用。此外还可在所述铁芯130外圈包裹绝缘层160，以避免所述铁芯130与所述金属板111直接接触，可隔断涡流。可见本实施例通过在所述金属板111上开设所述定子断流缝1200，以及通过所述封闭环120封边，并且在所述金属板111和金属材质的封闭环120之间设置绝缘件150，在所述铁芯130外圈设置绝缘层160，达到所述定子100在不改变金属材料的应用的前提下，实现抑制涡流损耗的目的。In summary, by opening the stator interrupting slit 1200 on the metal plate 111, the eddy current path is blocked, the eddy current loss is reduced and suppressed, and thus the reliability of the motor operation is ensured. In addition, at the edge of the metal plate 111 connected to the stator interrupting slit 1200, the closed ring 120 is added to avoid the problem of strength reduction of the metal plate 111 caused by the opening of the stator interrupting slit 1200, thereby ensuring the support capacity and strength of the metal plate 111. The closed ring 120 can be connected to the inner edge of the metal plate 111 to support the bearing 400. At this time, the closed ring 120 is a closed ring 120 made of metal material. By adding an insulating member 150 between the closed ring 120 and the inner edge of the metal plate 111, the stator interrupting slit 1200 is prevented from contacting with the closed ring 120 made of metal material, thereby destroying the flow isolation function. In addition, an insulating layer 160 may be wrapped around the outer ring of the iron core 130 to prevent the iron core 130 from directly contacting the metal plate 111, thereby isolating eddy currents. It can be seen that in this embodiment, by providing the stator current interrupting gap 1200 on the metal plate 111, sealing the edge through the closed ring 120, and providing an insulating member 150 between the metal plate 111 and the closed ring 120 made of metal, and providing an insulating layer 160 on the outer ring of the iron core 130, the stator 100 achieves the purpose of suppressing eddy current losses without changing the application of metal materials.
第二实施例Second embodiment
如图3所示，第二实施例的定子100与第一实施例不同在于，所述定子断流缝1200径向连通于所述铁芯安装孔1100和所述金属板111的外边缘。As shown in FIG. 3 , the stator 100 of the second embodiment is different from the first embodiment in that the stator interrupter gap 1200 is radially connected to the core mounting hole 1100 and the outer edge of the metal plate 111 .
当所述定子断流缝1200延伸连通至所述金属板111的外边缘时，所述封闭环120连接于所述金属板111的外边缘。由于所述金属板111无安装要求，因此所述封闭环120可采用高强度非金属材质，并且能够省略绝缘件150的设置，所述封闭环120可通过胶水、卡合等方式固定于所述金属板111的外边缘。When the stator interrupter gap 1200 extends to the outer edge of the metal plate 111, the closed ring 120 is connected to the outer edge of the metal plate 111. Since the metal plate 111 has no installation requirements, the closed ring 120 can be made of high-strength non-metallic material, and the insulating member 150 can be omitted. The closed ring 120 can be fixed to the outer edge of the metal plate 111 by glue, clamping, etc.
第三实施例Third embodiment
如图5和图10所示，所述轴向磁场电机，包括上述任一实施例的轴向磁场电机定子100，所述轴向磁场电机还包括至少一转子200、一转轴300和至少一轴承400，所述转轴300穿设于所述金属板111的中心，所述转轴300和所述金属板111之间设置有所述轴承400，所述转子200固定于所述转轴300上，且所述转子200与所述定子100气隙地保持。As shown in Figures 5 and 10, the axial magnetic field motor includes the axial magnetic field motor stator 100 of any of the above-mentioned embodiments, and the axial magnetic field motor also includes at least one rotor 200, a rotating shaft 300 and at least one bearing 400. The rotating shaft 300 is passed through the center of the metal plate 111, and the bearing 400 is arranged between the rotating shaft 300 and the metal plate 111. The rotor 200 is fixed on the rotating shaft 300, and the rotor 200 and the stator 100 are maintained with an air gap.
由于所述轴向磁场电机采用上述实施例的所述定子100，因此所述轴向磁场电机的有益效果可参考上述实施例的所述定子100。Since the axial magnetic field motor adopts the stator 100 of the above embodiment, the beneficial effects of the axial magnetic field motor can refer to the stator 100 of the above embodiment.
如图5至图7所示，所述转子200包括一转子盘210和若干个磁钢220，若干个所述磁钢 220呈圆周间隔设置于所述转子盘210上，所述磁钢220与所述铁芯130气隙地保持。当所述磁钢220设置于所述转子盘210上后，所述磁钢220略微突出于所述转子盘210表面，以与所述铁芯130气隙配合。As shown in FIG. 5 to FIG. 7 , the rotor 200 includes a rotor disk 210 and a plurality of magnetic steels 220. The magnetic steel 220 is arranged on the rotor disk 210 at circumferential intervals, and the magnetic steel 220 is maintained with an air gap with the iron core 130. When the magnetic steel 220 is arranged on the rotor disk 210, the magnetic steel 220 slightly protrudes from the surface of the rotor disk 210 to cooperate with the iron core 130 in the air gap.
参考图9，所述转子200上产生圆形的转子盘涡流路径2002，以及椭圆形的磁钢涡流路径2001，通过在所述转子盘210上开设转子断流缝2100，以阻断转子盘涡流路径2002，以及在所述磁钢220上形成断流面2200，以阻断磁钢涡流路径2001，参考图6和图7。进一步说明，每个所述磁钢220均对应产生所述磁钢涡流路径2001，其由内至外排列的多个椭圆形回路路径组成，所述断流面2200指的是与周向相切的缝隙，而该缝隙阻断各椭圆形回路路径，进而达到降低涡流损耗的效果。同理所述转子断流缝2100指的是多个由内至外排列的环形缝隙，而该缝隙能够阻断圆形的转子盘涡流路径2002。Referring to FIG9 , a circular rotor disk eddy current path 2002 and an elliptical magnetic steel eddy current path 2001 are generated on the rotor 200. A rotor flow cut-off slit 2100 is provided on the rotor disk 210 to block the rotor disk eddy current path 2002, and a flow cut-off surface 2200 is formed on the magnetic steel 220 to block the magnetic steel eddy current path 2001, referring to FIG6 and FIG7 . Further explanation: each magnetic steel 220 generates a corresponding magnetic steel eddy current path 2001, which is composed of a plurality of elliptical loop paths arranged from the inside to the outside. The flow cut-off surface 2200 refers to a gap tangent to the circumference, and the gap blocks each elliptical loop path, thereby achieving the effect of reducing eddy current loss. Similarly, the rotor flow cut-off slit 2100 refers to a plurality of annular gaps arranged from the inside to the outside, and the gap can block the circular rotor disk eddy current path 2002.
具体地，所述转子盘210上开设有若干个转子断流缝2100，以阻断涡流路径，达到降低涡流损耗的效果。其中转子盘涡流路径2002为图9示出的圆形路径，在所述转子盘210产生涡流路径，周向设置的所述转子断流缝2100能够阻断所述转子盘涡流路径2002。Specifically, the rotor disk 210 is provided with a plurality of rotor flow interrupting slits 2100 to block the eddy current path and achieve the effect of reducing eddy current loss. The rotor disk eddy current path 2002 is a circular path as shown in FIG. 9 , and an eddy current path is generated on the rotor disk 210 , and the rotor flow interrupting slits 2100 arranged circumferentially can block the rotor disk eddy current path 2002 .
参考5和图6，所述转子盘210朝向所述铁芯130的端面上开设有一磁钢容置槽2101，所述磁钢220定位于所述磁钢容置槽2101，且与所述铁芯130气隙地保持。所述转子断流缝2100可设置在所述磁钢容置槽2101底部，并且多个所述转子断流缝2100沿径向从内至外布置。此外所述转子断流缝2100的深度小于所述转子盘210的厚度，例如所述转子断流缝2100的深度为所述转子盘210厚度的1/5，并且所述转子断流缝2100的径向宽度为1mm，但不限于此。另外还可在所述转子断流缝2100内注入绝缘胶，实现抑制涡流损耗的同时，还能保证结构强度。Referring to Figures 5 and 6, a magnetic steel receiving groove 2101 is provided on the end surface of the rotor disk 210 facing the iron core 130, and the magnetic steel 220 is positioned in the magnetic steel receiving groove 2101 and maintained with an air gap with the iron core 130. The rotor flow cut-off seam 2100 can be arranged at the bottom of the magnetic steel receiving groove 2101, and a plurality of the rotor flow cut-off seams 2100 are arranged radially from the inside to the outside. In addition, the depth of the rotor flow cut-off seam 2100 is less than the thickness of the rotor disk 210, for example, the depth of the rotor flow cut-off seam 2100 is 1/5 of the thickness of the rotor disk 210, and the radial width of the rotor flow cut-off seam 2100 is 1 mm, but is not limited thereto. In addition, insulating glue can be injected into the rotor flow cut-off seam 2100 to suppress eddy current loss while ensuring structural strength.
参考图10，所述转子200还包括若干个压板230，相邻的两个所述磁钢220之间设置有一压板230，所述压板230通过紧固件固定在所述磁钢容置槽2101，并利用斜面与所述磁钢220的周向侧面适配，以对所述磁钢220进行轴向和周向定位。Referring to Figure 10, the rotor 200 also includes a plurality of pressure plates 230. A pressure plate 230 is arranged between two adjacent magnets 220. The pressure plate 230 is fixed to the magnet receiving groove 2101 by fasteners, and uses an inclined surface to adapt to the circumferential side surface of the magnet 220 to perform axial and circumferential positioning of the magnet 220.
更具体地，参考图7，所述磁钢220由若干个硅钢片221沿径向堆叠而成，相邻的两个所述硅钢片221之间形成断流面2200，所述断流面2200能够阻断所述磁钢涡流路径2001，达到抑制涡流损耗的效果。More specifically, referring to FIG. 7 , the magnetic steel 220 is formed by stacking a plurality of silicon steel sheets 221 radially, and a cut-off surface 2200 is formed between two adjacent silicon steel sheets 221 . The cut-off surface 2200 can block the eddy current path 2001 of the magnetic steel, thereby achieving the effect of suppressing eddy current loss.
所述磁钢220呈梯形，其数量与铁芯130的数量相一致，并且所述磁钢220的梯形上底朝内设置，所述磁钢220的梯形下底朝外设置。即组成所述磁钢220的若干个所述硅钢片221，其宽度沿径向从内至外增大。The magnetic steel 220 is trapezoidal, and the number thereof is consistent with the number of the iron cores 130. The upper bottom of the trapezoid of the magnetic steel 220 is arranged inward, and the lower bottom of the trapezoid of the magnetic steel 220 is arranged outward. That is, the width of the plurality of silicon steel sheets 221 constituting the magnetic steel 220 increases from the inside to the outside in the radial direction.
如图5所示，所述定子100的数量为一个，所述转子200的数量为两个，两个所述转子 200气隙地保持于所述定子100的轴向两侧，以形成单定子双转子的轴向磁场电机。当然可根据数量不同，得到单定子单转子，或者双定子单转子等轴向磁场电机。As shown in FIG5 , the number of the stator 100 is one, the number of the rotor 200 is two, and the two rotors 200 air gaps are maintained on both axial sides of the stator 100 to form an axial magnetic field motor with a single stator and two rotors. Of course, according to different quantities, an axial magnetic field motor with a single stator and a single rotor, or a double stator and a single rotor can be obtained.
综上所述，利用在所述转子盘210上开设所述转子断流缝2100，以阻断转子盘涡流路径2002，以及利用若干个硅钢片221堆叠形成磁钢220，以在相邻的两个所述硅钢片221之间形成断流面2200，以阻断磁钢涡流路径2001，不仅实现可制造性，并且有益于抑制涡流损耗。In summary, the rotor interrupter gap 2100 is opened on the rotor disk 210 to block the rotor disk eddy current path 2002, and a plurality of silicon steel sheets 221 are stacked to form the magnetic steel 220 to form a interrupter surface 2200 between two adjacent silicon steel sheets 221 to block the magnetic steel eddy current path 2001, which not only achieves manufacturability but also helps to suppress eddy current losses.
第四实施例Fourth embodiment
如图1至图6所示，所述轴向磁场电机的涡流损耗抑制方法，所述轴向磁场电机包括至少一定子100和至少一转子200，所述方法包括以下步骤：As shown in FIGS. 1 to 6 , the eddy current loss suppression method of the axial magnetic field motor, the axial magnetic field motor includes at least one stator 100 and at least one rotor 200, and the method includes the following steps:
在所述定子100的金属板111上开设沿径向排列的定子断流缝1200；Stator interrupter slots 1200 arranged in radial direction are provided on the metal plate 111 of the stator 100;
在所述转子200的转子盘210上开设沿周向排列的转子断流缝2100。The rotor disk 210 of the rotor 200 is provided with rotor interrupter slots 2100 arranged along the circumferential direction.
所述定子断流缝1200沿轴向贯穿所述金属板111，所述转子断流缝2100的深度小于所述转子盘210的厚度。所述定子断流缝1200能够阻断定子涡流路径1001，参考图8，所述转子断流缝2100能够阻断转子盘涡流路径2002，参考图9，以达到有效抑制电机涡流损耗的效果，并且所述定子断流缝1200和所述转子断流缝2100可利用刀具加工而成，实现可制造性的效果。The stator interrupting slit 1200 axially penetrates the metal plate 111, and the depth of the rotor interrupting slit 2100 is less than the thickness of the rotor disk 210. The stator interrupting slit 1200 can block the stator eddy current path 1001, refer to FIG8, and the rotor interrupting slit 2100 can block the rotor disk eddy current path 2002, refer to FIG9, so as to effectively suppress the eddy current loss of the motor, and the stator interrupting slit 1200 and the rotor interrupting slit 2100 can be processed by a tool to achieve the effect of manufacturability.
参考图7，所述转子200的磁钢220包括若干个硅钢片221，所述方法还包括：7 , the magnetic steel 220 of the rotor 200 includes a plurality of silicon steel sheets 221 , and the method further includes:
将若干个所述硅钢片221沿径向排列，以在相邻的两所述硅钢片221之间形成断流面2200。以使所述断流面2200能够阻断磁钢涡流路径2001，参考图9，保证所述硅钢片221整体性的同事，还能实现可制造性。Several silicon steel sheets 221 are arranged radially to form a cut-off surface 2200 between two adjacent silicon steel sheets 221. The cut-off surface 2200 can block the magnetic steel eddy current path 2001. Referring to FIG. 9, the integrity of the silicon steel sheet 221 is ensured while achieving manufacturability.
参考图1和图2，所述金属板111上设置有若干个圆周间隔排列的铁芯安装孔1100，所述定子断流缝1200连通于所述铁芯安装孔1100和所述金属板111的边缘，所述方法还包括：1 and 2 , the metal plate 111 is provided with a plurality of circumferentially spaced core mounting holes 1100 , the stator current interrupter 1200 is connected to the core mounting holes 1100 and the edge of the metal plate 111 , and the method further includes:
提供一封闭环120，将所述封闭环120连接于所述金属板111连通所述定子断流缝1200的边缘。A closed ring 120 is provided, and the closed ring 120 is connected to the edge of the metal plate 111 connected to the stator interrupter gap 1200 .
所述定子断流缝1200可延伸连通于所述金属板111的内外边缘，而所述封闭环120对应安装在所述金属板111的内外边缘，避免所述定子断流缝1200设置而影响所述金属板111的强度，可见利用上述结构，能够保证所述金属板111结构强度的同时，抑制涡流损耗。The stator interrupter gap 1200 can extend and connect to the inner and outer edges of the metal plate 111, and the closed ring 120 is correspondingly installed on the inner and outer edges of the metal plate 111 to avoid the stator interrupter gap 1200 affecting the strength of the metal plate 111. It can be seen that the above structure can ensure the structural strength of the metal plate 111 while suppressing eddy current losses.
综上所述，利用在所述金属板111上开设所述定子断流缝1200，在所述转子盘210上开设转子断流缝2100，以及在所述磁钢220上形成断流面2200，不仅成型方便，而且有效抑制涡流损耗，从而保证电机的可靠和稳定性。 In summary, by opening the stator interrupter gap 1200 on the metal plate 111, opening the rotor interrupter gap 2100 on the rotor disk 210, and forming the interrupter surface 2200 on the magnetic steel 220, not only the molding is convenient, but also the eddy current loss is effectively suppressed, thereby ensuring the reliability and stability of the motor.
以上所述的实施例仅用于说明本发明的技术思想及特点，其目的在于使本领域内的技术人员能够了解本发明的内容并据以实施，不能仅以本实施例来限定本发明的专利采用范围，即凡依本发明所揭示的精神所作的同等变化或修饰，仍落在本发明的专利范围内。 The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable technicians in this field to understand the content of the present invention and implement it accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims (11)

  1. 一种轴向磁场电机，其特征在于，包括一定子(100)和两转子(200)，所述定子(100)包括：An axial magnetic field motor, characterized in that it comprises a stator (100) and two rotors (200), wherein the stator (100) comprises:
    一定子机壳(110)，所述定子机壳(110)包括至少一金属板(111)，所述金属板(111)上设置有若干个圆周间隔排列的铁芯安装孔(1100)，所述金属板(111)上开设有若干个定子断流缝(1200)，所述定子断流缝(1200)沿径向连通于所述铁芯安装孔(1100)和所述金属板(111)的边缘；A stator housing (110), the stator housing (110) comprising at least one metal plate (111), the metal plate (111) being provided with a plurality of circumferentially spaced iron core mounting holes (1100), the metal plate (111) being provided with a plurality of stator current interrupting slots (1200), the stator current interrupting slots (1200) being radially connected to the iron core mounting holes (1100) and the edge of the metal plate (111);
    一封闭环(120)，所述封闭环(120)连接所述金属板(111)连通所述定子断流缝(1200)的边缘；a closed ring (120), the closed ring (120) connecting the metal plate (111) to an edge of the stator interrupter gap (1200);
    若干铁芯(130)，所述铁芯(130)安装在所述铁芯安装孔(1100)内并使所述铁芯(130)的两端暴露在所述金属板(111)两侧的两端上均套设有所述线圈(140)；A plurality of iron cores (130), wherein the iron cores (130) are installed in the iron core installation holes (1100) so that both ends of the iron cores (130) are exposed on both sides of the metal plate (111), and the coils (140) are sleeved on both ends;
    若干线圈(140)，所述线圈(140)套设在所述铁芯(130)上，所述铁芯(130)暴露在所述金属板(111)两侧的两端上均套设有所述线圈(140)；a plurality of coils (140), wherein the coils (140) are sleeved on the iron core (130), and the coils (140) are sleeved on both ends of the iron core (130) exposed on both sides of the metal plate (111);
    两所述转子(200)设置于所述金属板(111)的轴向两侧，所述铁芯(130)暴露在所述金属板(111)两侧的两端分别与所述转子(200)气隙保持。The two rotors (200) are arranged on both axial sides of the metal plate (111), and the two ends of the iron core (130) exposed on both sides of the metal plate (111) are respectively maintained with air gaps between the rotors (200).
  2. 如权利要求1所述的轴向磁场电机，其特征在于，所述定子断流缝(1200)连通至所述金属板(111)的外边缘；The axial magnetic field motor according to claim 1, characterized in that the stator interrupter gap (1200) is connected to the outer edge of the metal plate (111);
    或者，所述定子断流缝(1200)连通至所述金属板(111)的内边缘，所述封闭环(120)连接所述金属板(111)的内边缘和轴承(400)，所述封闭环(120)为金属材质制成的封闭环，并且所述金属板(111)的内边缘和所述封闭环(120)之间设置有绝缘件(150)。Alternatively, the stator interrupter gap (1200) is connected to the inner edge of the metal plate (111), the closed ring (120) connects the inner edge of the metal plate (111) and the bearing (400), the closed ring (120) is a closed ring made of a metal material, and an insulating member (150) is provided between the inner edge of the metal plate (111) and the closed ring (120).
  3. 如权利要求1所述的轴向磁场电机，其特征在于，所述定子机壳(110)还包括一中间隔板(112)，所述金属板(111)的数量为两个，所述中间隔板(112)拼接于两所述金属板(111)之间，并且所述铁芯安装孔(1100)和所述定子断流缝(1200)贯穿所述中间隔板(112)和两所述金属板(111)。The axial magnetic field motor according to claim 1 is characterized in that the stator housing (110) further includes an intermediate partition (112), the number of the metal plates (111) is two, the intermediate partition (112) is spliced between the two metal plates (111), and the core mounting hole (1100) and the stator interrupter seam (1200) pass through the intermediate partition (112) and the two metal plates (111).
  4. 如权利要求3所述的轴向磁场电机，其特征在于，所述金属板(111)背离所述中间隔板(112)的一侧设置线圈容置腔(1300)，所述线圈(140)保持于所述线圈容置腔(1300)内。The axial magnetic field motor according to claim 3 is characterized in that a coil accommodating cavity (1300) is provided on a side of the metal plate (111) facing away from the middle partition (112), and the coil (140) is retained in the coil accommodating cavity (1300).
  5. 如权利要求1所述的轴向磁场电机，其特征在于，还包括若干绝缘层(160)，所述铁芯(130)的外周包裹至少一绝缘层(160)，所述线圈(140)和所述金属板(111)之间设置于所述绝缘层(160)外部。 The axial magnetic field motor according to claim 1 is characterized in that it also includes a plurality of insulating layers (160), the outer periphery of the iron core (130) is wrapped with at least one insulating layer (160), and the coil (140) and the metal plate (111) are arranged outside the insulating layer (160).
  6. 如权利要求1至5任一项所述的种轴向磁场电机，其特征在于，所述轴向磁场电机还包括一转轴(300)和至少一轴承(400)，所述转轴(300)穿设于所述金属板(111)的中心，所述转轴(300)和所述金属板(111)之间设置有所述轴承(400)，所述转子(200)固定于所述转轴(300)上。The axial magnetic field motor according to any one of claims 1 to 5 is characterized in that the axial magnetic field motor also includes a rotating shaft (300) and at least one bearing (400), the rotating shaft (300) is passed through the center of the metal plate (111), the bearing (400) is arranged between the rotating shaft (300) and the metal plate (111), and the rotor (200) is fixed on the rotating shaft (300).
  7. 如权利要求6所述的轴向磁场电机，其特征在于，所述转子(200)包括一转子盘(210)和若干个磁钢(220)，若干个所述磁钢(220)呈圆周间隔设置于所述转子盘(210)上，所述磁钢(220)与所述铁芯(130)气隙地保持。The axial magnetic field motor according to claim 6 is characterized in that the rotor (200) comprises a rotor disk (210) and a plurality of magnets (220), wherein the plurality of magnets (220) are arranged on the rotor disk (210) at circumferential intervals, and the magnets (220) are maintained with an air gap with the iron core (130).
  8. 如权利要求7所述的轴向磁场电机，其特征在于，所述转子盘(210)上开设有若干个转子断流缝(2100)，每一所述转子断流缝(2100)沿周向设置；The axial magnetic field motor according to claim 7, characterized in that a plurality of rotor flow cut-off slits (2100) are provided on the rotor disk (210), and each of the rotor flow cut-off slits (2100) is arranged along the circumferential direction;
    和/或，所述磁钢(220)由若干个硅钢片(221)沿径向堆叠而成，相邻的两个所述硅钢片(221)之间形成断流面(2200)。And/or, the magnetic steel (220) is formed by stacking a plurality of silicon steel sheets (221) in a radial direction, and a cut-off surface (2200) is formed between two adjacent silicon steel sheets (221).
  9. 一种轴向磁场电机的涡流损耗抑制方法，其特征在于，所述轴向磁场电机包括至少一定子(100)和至少一转子(200)，所述方法包括以下步骤：A method for suppressing eddy current loss of an axial magnetic field motor, characterized in that the axial magnetic field motor comprises at least one stator (100) and at least one rotor (200), and the method comprises the following steps:
    在所述定子(100)的金属板(111)上开设沿径向排列的定子断流缝(1200)；Stator interrupter slits (1200) arranged in a radial direction are provided on the metal plate (111) of the stator (100);
    在所述转子(200)的转子盘(210)上开设沿周向排列的转子断流缝(2100)。Rotor flow interrupting slits (2100) arranged along the circumferential direction are provided on the rotor disk (210) of the rotor (200).
  10. 如权利要求9所述的轴向磁场电机的涡流损耗抑制方法，其特征在于，所述转子(200)的磁钢(220)包括若干个硅钢片(221)，所述方法还包括：The method for suppressing eddy current losses of an axial magnetic field motor according to claim 9, characterized in that the magnetic steel (220) of the rotor (200) comprises a plurality of silicon steel sheets (221), and the method further comprises:
    将若干个所述硅钢片(221)沿径向排列，以在相邻的两所述硅钢片(221)之间形成断流面(2200)。A plurality of silicon steel sheets (221) are arranged radially to form a flow cut-off surface (2200) between two adjacent silicon steel sheets (221).
  11. 如权利要求9所述的轴向磁场电机的涡流损耗抑制方法，其特征在于，所述金属板(111)上设置有若干个圆周间隔排列的铁芯安装孔(1100)，所述定子断流缝(1200)连通于所述铁芯安装孔(1100)和所述金属板(111)的边缘，所述方法还包括：The method for suppressing eddy current losses of an axial magnetic field motor according to claim 9, characterized in that a plurality of circumferentially spaced core mounting holes (1100) are provided on the metal plate (111), the stator current interrupting gap (1200) is connected to the core mounting hole (1100) and the edge of the metal plate (111), and the method further comprises:
    提供一封闭环(120)，将所述封闭环(120)连接于所述金属板(111)连通所述定子断流缝(1200)的边缘。 A closed ring (120) is provided, and the closed ring (120) is connected to the edge of the metal plate (111) connected to the stator interrupter gap (1200).
PCT/CN2023/116167 2022-11-30 2023-08-31 Axial flux motor and eddy current loss suppression method WO2024114004A1 (en)

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Publication number Priority date Publication date Assignee Title
CN115912835A (en) * 2022-11-30 2023-04-04 浙江盘毂动力科技有限公司 Directional magnetic field motor and eddy current loss suppression method

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JP2001054270A (en) * 1999-08-05 2001-02-23 Sankyo Seiki Mfg Co Ltd Counterposed type motor
CN1596495A (en) * 2001-11-29 2005-03-16 雅马哈发动机株式会社 Axial gap type rotating electric machine
CN111884384A (en) * 2020-08-20 2020-11-03 浙江西子富沃德电机有限公司 Double-sided output stator assembly and machining method and application thereof
CN216489958U (en) * 2022-01-05 2022-05-10 上海盘毂动力科技股份有限公司 Axial magnetic field motor rotor capable of reducing eddy current loss
CN115346791A (en) * 2022-09-02 2022-11-15 浙江盘毂动力科技有限公司 Method for manufacturing magnetic element
CN115912835A (en) * 2022-11-30 2023-04-04 浙江盘毂动力科技有限公司 Directional magnetic field motor and eddy current loss suppression method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001054270A (en) * 1999-08-05 2001-02-23 Sankyo Seiki Mfg Co Ltd Counterposed type motor
CN1596495A (en) * 2001-11-29 2005-03-16 雅马哈发动机株式会社 Axial gap type rotating electric machine
CN111884384A (en) * 2020-08-20 2020-11-03 浙江西子富沃德电机有限公司 Double-sided output stator assembly and machining method and application thereof
CN216489958U (en) * 2022-01-05 2022-05-10 上海盘毂动力科技股份有限公司 Axial magnetic field motor rotor capable of reducing eddy current loss
CN115346791A (en) * 2022-09-02 2022-11-15 浙江盘毂动力科技有限公司 Method for manufacturing magnetic element
CN115912835A (en) * 2022-11-30 2023-04-04 浙江盘毂动力科技有限公司 Directional magnetic field motor and eddy current loss suppression method

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