WO2024037184A1 - Bobine en épingle à cheveux, enroulement en épingle à cheveux et moteur électrique en épingle à cheveux - Google Patents

Bobine en épingle à cheveux, enroulement en épingle à cheveux et moteur électrique en épingle à cheveux Download PDF

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Publication number
WO2024037184A1
WO2024037184A1 PCT/CN2023/102033 CN2023102033W WO2024037184A1 WO 2024037184 A1 WO2024037184 A1 WO 2024037184A1 CN 2023102033 W CN2023102033 W CN 2023102033W WO 2024037184 A1 WO2024037184 A1 WO 2024037184A1
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WO
WIPO (PCT)
Prior art keywords
hairpin
coil
conductor
insulating layer
shaped conductor
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PCT/CN2023/102033
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English (en)
Chinese (zh)
Inventor
滕超
马永承
Original Assignee
合肥汉之和新材料科技有限公司
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Publication of WO2024037184A1 publication Critical patent/WO2024037184A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to the technical field of motor windings, and more specifically, to a hairpin coil, a hairpin winding and a hairpin motor.
  • the windings of high-power motors are usually composed of hairpin coils, so that the motor has the advantages of high power density, low cost, and good heat resistance.
  • the hairpin coil is formed by bending an insulated flat wire.
  • the bending point of the insulating layer of the insulated flat wire is prone to changes.
  • the insulating layer cracks, falls off, or changes in thickness, etc., resulting in a reduction in the heat resistance, voltage resistance, and scratch resistance of the hairpin coil. Reduced overall motor performance.
  • the entire hairpin-shaped conductor in the insulated flat wire is provided with an insulation layer.
  • the two ends of the hairpin coil need to be welded to the two ends of other hairpin coils to form a winding. Therefore, a laser needs to be used to remove the hairpin before making the winding.
  • the insulation layers at both ends of the coil must be welded, which results in a complicated process, high equipment costs, and low production efficiency.
  • the object of the present invention is to provide a hairpin coil to improve the performance of the hairpin coil and simplify the manufacturing process of the hairpin winding.
  • Another object of the present invention is to provide a hairpin winding with the above hairpin coil and a hairpin motor with the above hairpin winding.
  • a hairpin coil includes: a hairpin-shaped conductor and an insulating layer;
  • the hairpin-shaped conductor includes: a hairpin-shaped conductor main body and a conductor connecting portion electrically connected to the hairpin-shaped conductor main body; there are two conductor connecting portions and they are respectively located at both ends of the hairpin-shaped conductor;
  • the insulation layer is only electrophoresed on the surface of the hairpin-shaped conductor body, the conductor connection portion is exposed, and the insulation layer is a polyimide coating.
  • the conductor connection portion is located at an end of the hairpin-shaped conductor, and the insulation layer extends from one conductor connection portion to the other conductor connection portion.
  • the insulating layer includes a first insulating layer and a second insulating layer.
  • One second insulating layer, One of the conductor connecting parts, the first insulating layer, the other of the conductor connecting parts and the other of the second insulating layers are distributed in sequence.
  • the hairpin-shaped conductor is formed by placing the insulating layer in an electrophoresis device, or the hairpin coil is formed by bending a conductor electrophoresed with the insulating layer.
  • the length of the conductor connection part is 1 cm-100 cm, and/or the hairpin-shaped conductor body and the conductor connection part are an integrated structure.
  • the thickness of the polyimide coating is ⁇ , and the value range of ⁇ is 30 ⁇ m-200 ⁇ m; in the same hairpin coil, the maximum thickness of the polyimide coating and the thickness of the polyimide coating are The minimum thickness of the imine coating differs by no more than 20% delta.
  • the insulating layer is only one layer of the polyimide coating; and/or the hairpin conductor is a copper piece.
  • the present invention also provides a hairpin winding, which hairpin winding includes at least two electrically connected hairpin coils, wherein the hairpin coil is the hairpin coil described in any one of the above.
  • the hairpin winding is a stator winding of a hairpin motor.
  • the present invention also provides a hairpin motor, which hairpin motor includes a hairpin winding, wherein the hairpin winding is any of the hairpin windings described above.
  • the insulating layer is electrophoresed on the surface of the hairpin-shaped conductor body.
  • the insulating layer is provided by electrophoresis, which effectively improves the toughness of the insulating layer and reduces the changes in the insulating layer during the bending process, thereby improving the efficiency of the hairpin coil. It improves the heat resistance, voltage resistance and scratch resistance of the insulating layer, which improves the performance of the hairpin coil, thereby improving the overall performance of the hairpin motor; through electrophoresis, the insulating layer can also be directly formed on the surface of the hairpin-shaped conductor body.
  • the insulation layer is selected as polyimide coating, which further improves the heat resistance, voltage resistance and scratch resistance of the insulation layer, that is, the performance of the hairpin coil is improved, thereby improving the hairpin The overall performance of the motor.
  • the insulation layer is only electrophoresed on the hairpin-shaped conductor body, and the conductor connection part is exposed. Therefore, there is no need to remove the insulation layer of the conductor connection part before making the hairpin winding, which reduces the operating steps, thereby simplifying the hairpin hairpin coil.
  • the winding manufacturing process improves the production efficiency of hairpin windings.
  • the hairpin coil provided by the present invention not only improves the performance of the hairpin coil, but also simplifies the manufacturing process of the hairpin winding.
  • Figure 1 is a schematic structural diagram of a hairpin coil provided by an embodiment of the present invention.
  • Figure 2 is a partial enlarged view of Figure 1;
  • Figure 3 is a schematic diagram of the cross-section of the hairpin coil in Figure 1 at the first position 1;
  • Figure 4 is a partial schematic diagram of a longitudinal section of the area where the hairpin coil is at the sixth position 6 in Figure 1;
  • Figure 5 is another structural schematic diagram of a hairpin coil provided by an embodiment of the present invention.
  • the hairpin coil provided by the embodiment of the present invention includes a hairpin-shaped conductor 1 and an insulating layer 2 .
  • the hairpin-shaped conductor includes: a hairpin-shaped conductor main body 12 and a conductor connecting portion 11 electrically connected to the end of the hairpin-shaped conductor main body 12. There are two conductor connecting portions 11 and they are respectively located at both ends of the hairpin-shaped conductor 1. It can be understood that the conductor connection portion 11 of one hairpin coil is electrically connected to the conductor connection portion 11 of the other hairpin coil to realize the electrical connection of the two hairpin coils.
  • the above-mentioned insulating layer 2 is only electrophoresed on the surface of the hairpin-shaped conductor body 12, and the conductor connecting portion 11 is exposed. It can be understood that the insulating layer 2 is not electrophoresed on the conductor connecting portion 11 .
  • the above-mentioned insulating layer 2 is a polyimide coating.
  • the polyimide coating is electrophoretically deposited using a polyimide electrophoresis solution and then dried to form a film.
  • the above-mentioned polyimide coating uses an anodic electrophoresis process to form a dense, uniform thickness, high temperature resistance, corrosion resistance, and voltage resistance film layer on the surface of the hairpin-shaped conductor body 12, and the film layer has good toughness and can be used freely. There will be no wrinkles, cracks or any other defects when bent.
  • the voltage of the above-mentioned electrophoresis can be 20V-80V. In practical applications, the above-mentioned voltage value can be adjusted appropriately, which is not limited in this embodiment.
  • the above drying method is: first dry at a constant temperature at a drying temperature of 70°C-90°C for 10min-60min, then raise the temperature to 100°C-140°C, dry at a constant temperature at a drying temperature of 100°C-140°C for 10min-60min, and then increase the temperature. to 180°C-210°C, dry at a constant temperature at a drying temperature of 180°C-210°C for 10min-60min, and finally raise the temperature to 220°C-250°C, and dry at a constant temperature at a drying temperature of 220°C-250°C for 10min-60min.
  • the insulating layer 2 is electrophoresed on the surface of the hairpin-shaped conductor body 12 On the surface, the insulating layer 2 is provided by electrophoresis, which effectively improves the toughness of the insulating layer 2 and reduces the changes that occur during the bending process of the insulating layer 2, thereby improving the heat resistance, voltage resistance and scratch resistance of the insulating layer 2 and other properties, that is, the performance of the hairpin coil is improved, thereby improving the overall performance of the hairpin motor; through electrophoresis, the insulating layer 2 can also be directly formed on the surface of the hairpin-shaped conductor body 12, that is, there is no need to bend the insulating layer 2 after forming it.
  • the changes of the insulating layer 2 during the bending process are avoided, thereby improving the heat resistance, voltage resistance and scratch resistance of the insulating layer 2, that is, improving the performance of the hairpin coil, thereby improving the overall performance of the hairpin motor.
  • the insulation layer 2 is selected to be polyimide coating, which further improves the heat resistance, voltage resistance and scratch resistance of the insulation layer 2, that is, improves the performance of the hairpin coil, thereby improving the overall performance of the hairpin motor.
  • the insulating layer 2 is only electrophoresed on the hairpin-shaped conductor body 12, and the conductor connecting portion 11 is exposed. That is, during the process of setting the insulating layer 2, the insulating layer 2 is not provided on the conductor connecting portion 11. There is no need to remove the insulation layer 2 outside the conductor connection part 11 before making the hairpin winding, which reduces the operating steps, thereby simplifying the hairpin winding manufacturing process and improving the production efficiency of the hairpin winding.
  • the hairpin coil provided by the above embodiment not only improves the performance of the hairpin coil, but also simplifies the hairpin winding manufacturing process.
  • the conductor connecting portion 11 may be located at the end of one end of the hairpin-shaped conductor 1 or at the non-end of one end of the hairpin-shaped conductor 1 .
  • the conductor connection part 11 is located at the end of the hairpin-shaped conductor 1 , and the insulation layer 2 extends from one conductor connection part 11 to the other conductor connection part 11 . At this time, the entire insulating layer 2 is located between the two conductor connecting portions 11 .
  • the conductor connection portion 11 is located at the non-end portion of one end of the hairpin-shaped conductor 1 .
  • the insulating layer 2 includes a first insulating layer 21 and a second insulating layer 22. There are two second insulating layers 22 and they are respectively located at both ends of the hairpin-shaped conductor 1. One second insulating layer 22 and one conductor are connected. part 11, the first insulating layer 21, another conductor connection part 11 and another second insulating layer 22 are distributed in sequence.
  • first insulating layer 21 extends from one conductor connection portion 11 to another conductor connection portion 11 .
  • Body connection part 11, one conductor connection part 11 is located between one end of the first insulating layer 21 and a second insulating layer 22, and the other conductor connection part 11 is located between the other end of the first insulating layer 21 and another second insulating layer. between 22.
  • the hairpin-shaped conductor 1 can be placed in an electrophoresis device to form the insulating layer 2 . It can be understood that the straight wire is first bent into a hairpin shape, that is, the hairpin conductor 1 is formed, and then the insulating layer 2 is directly electrophoresed on the surface of the hairpin conductor body 12 of the hairpin conductor 1 .
  • the hairpin-shaped conductor 1 is first subjected to acid and alkali cleaning treatment to remove surface oil stains. After cleaning, the hairpin-shaped conductor body 12 of the hairpin-shaped conductor 1 is placed in the electrophoresis solution, and the hairpin-shaped conductor 1 is used as the positive electrode, and a voltage of 20V-80V is applied. , electrify for electrophoresis. By controlling the current and energization time, the polyimide coating can be slowly grown on the surface of the hairpin-shaped conductor body 12, and finally the polyimide coating is obtained. After the electrophoresis is completed, the polyimide coating will be The hairpin-shaped conductor 1 is hung in the oven and dried at different temperatures. After drying, the temperature is lowered to obtain a hairpin coil.
  • the hairpin coil may also be formed by bending a conductor with an insulating layer 2 through electrophoresis. It can be understood that the above-mentioned hairpin coil is formed by first electrophoresising the insulating layer 2 on the conductor, and then bending the conductor electrophoresed with the insulating layer 2 into a hairpin shape.
  • the conductor is first washed with acid and alkali to remove surface oil stains.
  • the electrophoresis scheme is as described above.
  • the surface of the conductor is coated with polyimide and then bent into a hairpin coil according to the specified angle and size.
  • the length of the conductor connecting portion 11 is selected according to actual needs, for example, set according to welding requirements. In order to facilitate subsequent winding production, the length of the conductor connecting portion 11 can be selected to be 1cm-100cm.
  • the length of the conductor connecting portion 11 can also be adjusted appropriately and is not limited to the above embodiment.
  • the hairpin-shaped conductor main body 12 and the conductor connection part 11 can be an integrated structure or a separate structure, which can be selected according to needs.
  • the hairpin-shaped conductor body 12 and the conductor connecting portion 11 can be selected to have an integrated structure.
  • the thickness of the above polyimide coating can be set according to actual needs.
  • the above poly The thickness of the imide coating is ⁇ , and the value range of ⁇ is 30 ⁇ m-200 ⁇ m.
  • the polyimide coating is electrophoresed on the hairpin-shaped conductor body 12, which can effectively reduce thickness changes.
  • the difference between the maximum thickness of the polyimide coating and the minimum thickness of the polyimide coating is not greater than 20% ⁇ .
  • the thickness of the above-mentioned polyimide coating is ⁇ , and the value range of ⁇ is 30 ⁇ m. -32 ⁇ m, the difference between the maximum thickness of the above-mentioned polyimide coating and the minimum thickness of the polyimide coating is 2 ⁇ m, and 2 ⁇ m is less than 20% ⁇ , that is, 2 ⁇ m is less than 6 ⁇ m, and 2 ⁇ m is less than 6.4 ⁇ m.
  • the thickness of the above-mentioned polyimide coating and the difference between the maximum thickness of the polyimide coating and the minimum thickness of the polyimide coating can also be appropriately adjusted according to the performance requirements of the hairpin coil. It is not limited to the above embodiment.
  • the above-mentioned hairpin coil includes eight coil segments connected in sequence, namely the first coil segment 01, the second coil segment 02, the third coil segment 03, the fourth coil segment 04, and the fifth coil connected in sequence.
  • the first coil segment 01, the second coil segment 02, the third coil segment 03, the sixth coil segment 06, the seventh coil segment 07 and the eighth coil segment 08 are all linear
  • the fourth coil segment 04 and the fifth coil segment 04 are linear.
  • the coil segments 05 are all linear or curved.
  • the above-mentioned first coil section 01 is located at one end of the hairpin coil, and the eighth coil section 08 is located at the other end of the hairpin coil; both the first coil section 01 and the eighth coil section 08 include the above-mentioned conductor connection portion 11 .
  • first coil segment 01 and the eighth coil segment 08 are arranged in parallel, the third coil segment 03 and the sixth coil segment 06 are arranged in parallel, and the second coil segment 02 and the seventh coil segment 07 are relatively inclined.
  • the connection between the fourth coil segment 04 and the fifth coil segment 05 protrudes in a direction away from the third coil segment 03 and the sixth coil segment 06. If both the fourth coil segment 04 and the fifth coil segment 05 are linear, Then there is an included angle between the fourth coil segment 04 and the fifth coil segment 05.
  • the angle between the third coil segment 03 and the fourth coil segment 04 and the angle between the fifth coil segment 05 and the sixth coil segment 06 can be increased.
  • the angle between the hairpin coils can reduce the height from both ends of the hairpin coil to the apex, thereby reducing the equivalent turning radius of the hairpin winding.
  • the outermost part of the hairpin winding can enter the horizontal state in advance to further improve the hairpin motor. s efficiency.
  • the vertex of the hairpin coil is the connection point between the fourth coil section 04 and the fifth coil section 05 .
  • the outermost part of the hairpin winding refers to the outermost part of the hairpin winding according to the concentric winding arrangement.
  • the polyimide coating may be one layer or at least two layers. Due to the better performance of the polyimide coating, you can choose that the above-mentioned insulation layer is only one layer of polyimide coating. In this way, the thickness of the polyimide coating is effectively reduced, thereby reducing the overall hairpin winding. The volume of the card issuing motor is correspondingly reduced.
  • the type of hairpin-shaped conductor 1 is selected according to actual needs.
  • the hairpin-shaped conductor 1 can be selected to be a copper piece.
  • both the hairpin-shaped conductor body 12 and the conductor connecting portion 11 are copper parts.
  • the hairpin coil provided in the first embodiment includes a hairpin-shaped conductor 1 and an insulating layer 2 .
  • the above-mentioned hairpin-shaped conductor 1 includes: a hairpin-shaped conductor main body 12, and a conductor connecting portion 11 connected to the end of the hairpin-shaped conductor main body 12; wherein, there are two conductor connecting portions 11, and they are respectively located at both ends of the hairpin-shaped conductor 1. It can be understood that the conductor connection portion 11 of one hairpin coil is electrically connected to the conductor connection portion 11 of the other hairpin coil to realize the electrical connection of the two hairpin coils.
  • the above-mentioned insulating layer 2 is only electrophoresed on the surface of the hairpin-shaped conductor body 12, the conductor connecting portion 11 is exposed, and the insulating layer 2 is a polyimide coating.
  • the above-mentioned hairpin-shaped conductor 1 is placed in an electrophoresis device to form an insulating layer 2 .
  • the conductor is first bent in a hairpin shape to form a hairpin conductor 1, the hairpin conductor 1 is subjected to acid and alkali cleaning treatment to remove surface oil stains, and after cleaning, the hairpin conductor body 12 of the hairpin conductor 1 is immersed in polyimide.
  • the hairpin-shaped conductor 1 is used as the positive electrode and is energized.
  • the DC voltage is 80V to start electrophoresis.
  • the electrophoresis time is controlled by the current size for 4 minutes, so that the polyimide coating slowly grows on the surface of the hairpin-shaped conductor body 12, making the hairpin-shaped conductor 12.
  • the surface of the conductor body 12 is covered with a polyimide coating.
  • the conditions are: first dry at a constant temperature of 80°C for 30 minutes, then raise the temperature to 110°C and dry at a constant temperature for 30 minutes, and then raise the temperature. Dry at a constant temperature of 190°C for 30 minutes, and finally raise the temperature to 230°C and dry at a constant temperature for 30 minutes.
  • the hairpin coil prepared in the above manner was tested for film thickness.
  • the hairpin coil prepared in the above method was tested for voltage resistance, insulation resistance and PDIV (Partial Discharge Initiation Voltage) performance.
  • the withstand voltage of the hairpin coil reached 5kV; DC 1kV, and the insulation resistance of the hairpin coil reached 20G ⁇ in 5s. ;
  • the PDIV of the card issuing coil can reach 900V.
  • the hairpin coil Take the above-mentioned hairpin coil and place it in a high-temperature oven at 350°C for 1 hour. Then take it out and cool it to room temperature. Observe that the polyimide coating on the surface of the hairpin coil has a good appearance and evaluate its performance: the withstand voltage can reach 5kV; DC 1kV, hairpin The insulation resistance of the coil reaches 20G ⁇ in 5 seconds; the PDIV of the hairpin coil can reach 900V.
  • the volume of the hairpin motor can be reduced by up to 0.8%.
  • the structure of the hairpin coil provided in the second embodiment is the same as that in the first embodiment, except for the manufacturing process. Specifically, the voltage during the electrophoresis process is different. In the second embodiment, the voltage during the electrophoresis process is 40V.
  • the hairpin coil prepared in the above manner was tested for film thickness.
  • the hairpin coil prepared in the above method was tested for voltage resistance, insulation resistance and PDIV performance.
  • the withstand voltage of the hairpin coil reached 2kV; DC 1kV, the insulation resistance of the hairpin coil reached 16G ⁇ in 5s; the PDIV of the hairpin coil reached 600V.
  • the hairpin coil Take the above-mentioned hairpin coil and place it in a high-temperature oven at 350°C for 1 hour, then take it out and cool it to room temperature.
  • the polyimide coating on the surface of the hairpin coil has a good appearance and evaluate its performance: the withstand voltage of polyimide reaches 2kV; DC 1kV, the insulation resistance of the hairpin coil reaches 16G ⁇ in 5s, the hairpin coil PDIV can reach 600V.
  • the size of the hairpin motor can be reduced by up to 1.0%.
  • the main difference between the hairpin coil provided in the third embodiment and the first embodiment is that the hairpin coil is formed by bending a conductor with an insulating layer 2 through electrophoresis.
  • the conductor is first washed with acid and alkali to remove surface oil stains. After cleaning, the part of the conductor used to form the hairpin-shaped conductor body 12 is immersed in the polyimide electrophoresis solution.
  • the conductor serves as the positive electrode and is energized with a DC voltage of 80V. Start electrophoresis, control the electrophoresis time for 4 minutes by the current size, and allow the polyimide coating to slowly grow on the surface of the conductor so that the surface of the conductor is covered with the polyimide coating.
  • the electrophoretic deposition After the electrophoretic deposition is completed, take it out, use airflow to blow off the remaining polyimide electrophoresis solution on the surface, and perform a programmed temperature-raising drying process on the electrophoresed material.
  • the conditions are 80°C constant temperature drying for 30 minutes, then the temperature is raised to 110°C constant temperature drying for 30 minutes, and then the temperature is raised. Dry at a constant temperature of 190°C for 30 minutes, and finally raise the temperature to 230°C and dry at a constant temperature for 30 minutes.
  • the polyimide-coated conductor prepared in the above manner is bent into a hairpin shape. After confirming the bending angle and size, a hairpin coil is formed. The film thickness of the hairpin coil is tested. The film thickness of the hairpin coil is tested through various parts, especially corners and other irregular shapes. The film thickness test at , shows a result of 55 ⁇ 2 ⁇ m, indicating that the thickness of the polyimide coating is uniform.
  • the hairpin coil produced by the above method was tested for voltage resistance, insulation resistance and PDIV performance.
  • the withstand voltage of the hairpin coil reached 5kV; DC 1kV, the insulation resistance of the hairpin coil reached 20G ⁇ in 5s; the PDIV of the hairpin coil could reach 900V.
  • the hairpin coil Take the above-mentioned hairpin coil and place it in a high-temperature oven at 350°C for 1 hour, then take it out and cool it to room temperature. Observe that the polyimide coating on the surface of the hairpin coil has a good appearance and evaluate its performance: the withstand voltage of the hairpin coil reaches 5kV; DC 1kV, the insulation resistance of the hairpin coil reaches 20G ⁇ in 5s; the PDIV of the hairpin coil can reach 900V.
  • the volume of the hairpin motor can be reduced by up to 0.8%.
  • the hairpin-shaped conductor 1 is washed with acid and alkali and then immersed in the water-based polyester insulating electrophoretic paint.
  • the DC voltage is 80V to start electrophoresis.
  • the electrophoresis time is controlled by the current size for 4 minutes, so that the polyester coating slowly grows on the surface of the hairpin-shaped conductor 1.
  • the surface of the hairpin-shaped conductor 1 is covered with a polyester coating.
  • the electrophoretic deposition After the electrophoretic deposition is completed, take it out, use airflow to blow off the remaining polyester paint on the surface, and perform a programmed temperature drying process on the electrophoresed material.
  • the conditions are 80°C constant temperature drying for 30 minutes, and then the temperature is raised to 150°C constant temperature drying for 30 minutes.
  • the hairpin coil prepared in the above manner was tested for film thickness.
  • the hairpin coil produced by the above method was tested for voltage resistance, insulation resistance and PDIV performance.
  • the withstand voltage of the hairpin coil reached 1.5kV; DC 1kV, the insulation resistance of the hairpin coil reached 3G ⁇ in 5s; the PDIV of the hairpin coil was 305V.
  • the above-mentioned hairpin coil was placed in a high-temperature oven at 350°C for 1 hour and then taken out. Bubbles appeared on the surface, making subsequent testing impossible.
  • the conductor is washed with acid and alkali to remove surface oil. After cleaning, the conductor is immersed in water-based polyester insulating electrophoretic paint.
  • the DC voltage is 80V to start electrophoresis.
  • the electrophoresis time is controlled by the current size for 4 minutes, so that the polyester coating slowly spreads on the surface of the conductor. Growth is performed so that the surface of the conductor is covered with a polyester coating.
  • the conditions are constant temperature drying at 80°C for 30 minutes, and constant temperature drying at 150°C for 30 minutes.
  • the conductor prepared in the above manner was bent into a hairpin shape, and wrinkles and cracks appeared at the bending area, making subsequent testing impossible.
  • the above-mentioned film thickness test is specifically measured using an eddy current film thickness meter.
  • the above-mentioned withstand voltage performance test is as follows: prepare 1cm wide tin foil, sandwich the hairpin coil to be tested between two tin foils, connect the circuit, gradually increase the voltage, the speed of voltage increase is 100V/s, read the damage voltage at , this voltage value is the withstand voltage value;
  • the above-mentioned insulation resistance test is specifically: sandwich the hairpin coil to be tested between the positive and negative electrodes, without contacting any other substances in the middle, turn on the power, the voltage rise rate should not exceed 100V per second, gradually increase the voltage to 1kV, and test its insulation resistance;
  • the above PDIV performance test is specifically to wipe the hairpin coil to be tested clean, then use a graphite brush to coat the middle part of the hairpin coil (the coating length is about 5cm), then blow dry with a hair dryer, and put the dried sample into the oven In medium heating, the relative dielectric loss value is tested through temperature changes, and the value is intuitively reflected on the computer display in the form of a curve.
  • the hairpin coil provided in Implementation 1, Implementation 2, Implementation 3 and Comparative Example 1 will be tested for thickness at seven positions on the hairpin coil. Specifically, as shown in Figure 1, at the first position 1, the The second position 2, the third position 3, the fourth position 4, the fifth position 5, the sixth position 6 and the seventh position 7 are tested for thickness.
  • the thickness unit is ⁇ m.
  • the test data is shown in the following table:
  • the dimensional tolerance is the value obtained by subtracting the minimum limit size from the maximum limit size.
  • the thickness of the insulating layer 2 is smaller, which effectively reduces the radial size of the hairpin winding, thereby effectively reducing the size of the hairpin motor.
  • the size of the card-issuing motor can be reduced by up to 1%.
  • this embodiment also provides a hairpin winding, which hairpin winding includes at least two electrically connected hairpin coils, wherein the hairpin coil is the hairpin coil described in the above embodiment.
  • two electrically connected hairpin coils means that the conductor connection part 11 of one hairpin coil is electrically connected to the conductor connection part 11 of the other hairpin coil.
  • the hairpin coil provided in the above embodiment has the above technical effects, and the above hairpin winding includes the above hairpin coil, the above hairpin winding also has corresponding technical effects, which will not be described again here.
  • the type of the hairpin winding is selected according to actual needs.
  • the hairpin winding is a stator winding, which is not limited in this embodiment.
  • this embodiment also provides a card hairpin motor, which includes a hairpin winding, and the hairpin winding is the hairpin winding provided in the above embodiment.
  • the card issuing winding provided in the above embodiment has the above technical effects
  • the above card issuing motor includes the above card issuing winding
  • the above described card issuing motor also has corresponding technical effects, which will not be described again here.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

La présente invention concerne une bobine en épingle à cheveux, un enroulement en épingle à cheveux et un moteur électrique en épingle à cheveux. La bobine en épingle à cheveux comprend un conducteur en forme d'épingle à cheveux et une couche isolante. Le conducteur en forme d'épingle à cheveux comprend un corps de conducteur en forme d'épingle à cheveux, et des parties de connexion de conducteur électriquement connectées au corps de conducteur en forme d'épingle à cheveux, et deux parties de connexion de conducteur sont disposées et situées respectivement à deux extrémités du conducteur en forme d'épingle à cheveux ; et la couche isolante est disposée uniquement sur une surface du corps de conducteur en forme d'épingle à cheveux de manière électrophorétique, les parties de connexion de conducteur sont exposées, et la couche isolante est un revêtement de polyimide. Dans la bobine en épingle à cheveux, la couche isolante est disposée de manière électrophorétique et est un revêtement de polyimide, ce qui permet d'améliorer efficacement les propriétés de ténacité, de résistance à la chaleur, de résistance à la tension, de résistance aux rayures, etc., de la couche isolante, et donc d'améliorer les propriétés de la bobine en épingle à cheveux. La couche isolante est disposée uniquement sur le corps de conducteur en forme d'épingle à cheveux de manière électrophorétique, et les parties de connexion de conducteur sont exposées, de telle sorte qu'il n'est pas nécessaire d'enlever la couche isolante sur les parties de connexion de conducteur avant la fabrication de l'enroulement en épingle à cheveux, ce qui permet de simplifier le processus de fabrication de l'enroulement en épingle à cheveux, et d'améliorer l'efficacité de production de celui-ci.
PCT/CN2023/102033 2022-08-18 2023-06-25 Bobine en épingle à cheveux, enroulement en épingle à cheveux et moteur électrique en épingle à cheveux WO2024037184A1 (fr)

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CN218276241U (zh) * 2022-08-18 2023-01-10 合肥汉之和新材料科技有限公司 发卡线圈、发卡绕组和发卡电机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111817467A (zh) * 2019-04-10 2020-10-23 三菱电机株式会社 旋转电机的定子绕组及其制造方法
CN212750993U (zh) * 2020-08-25 2021-03-19 合肥汉之和新材料科技有限公司 一种动力电池
CN113691033A (zh) * 2020-05-19 2021-11-23 通用电气航空系统有限责任公司 用于定子芯的热绝缘部分的方法和系统
WO2022004299A1 (fr) * 2020-07-01 2022-01-06 パナソニックＩｐマネジメント株式会社 Bobine, moteur et procédé de fabrication
CN218276241U (zh) * 2022-08-18 2023-01-10 合肥汉之和新材料科技有限公司 发卡线圈、发卡绕组和发卡电机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111817467A (zh) * 2019-04-10 2020-10-23 三菱电机株式会社 旋转电机的定子绕组及其制造方法
CN113691033A (zh) * 2020-05-19 2021-11-23 通用电气航空系统有限责任公司 用于定子芯的热绝缘部分的方法和系统
WO2022004299A1 (fr) * 2020-07-01 2022-01-06 パナソニックＩｐマネジメント株式会社 Bobine, moteur et procédé de fabrication
CN212750993U (zh) * 2020-08-25 2021-03-19 合肥汉之和新材料科技有限公司 一种动力电池
CN218276241U (zh) * 2022-08-18 2023-01-10 合肥汉之和新材料科技有限公司 发卡线圈、发卡绕组和发卡电机

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