Manufacturing method of graphene coil of axial magnetic flux motor

Abstract

The invention discloses a manufacturing method of a graphene coil of an axial flux motor. The method comprises the following steps: shearing a steel wire with a set length, pressing a copper wire lug at one end of the steel wire by using a hydraulic crimping clamp, clamping the end of the steel wire provided with the copper wire lug below by using a lower hydraulic clamp, sleeving the steel wire with an insulating pipe with a set length, clamping the end of the steel wire not provided with the copper wire lug above by using an upper hydraulic clamp, and tensioning the steel wire; and the electric vibrator is used for vibrating the upper hydraulic clamp. The graphene powder is injected into the insulating tube, and after the glass fiber tube or the basalt ceramic fiber tube is filled with the graphene powder, the copper wire lug is pressed at the upper end of the steel wire by a hydraulic wire pressing clamp. The graphene wire sleeved with the insulating tube is arranged in a wire slot of a stator core of the axial magnetic flux motor, then is put into a medium-frequency electromagnetic ceramic heating furnace, and is covered with a sealing cover. Nitrogen with the pressure of 2 Mpar is introduced into the medium-frequency electromagnetic ceramic heating furnace, alternating current is introduced, the stator iron of the axial flux motor and the graphene coil are heated to exceed 220 DEG C, and graphene is cured.

Description

Technical fields:

[0001] This invention relates to a method for manufacturing a graphene coil for an axial flux motor. Background technology:

[0002] Graphene has a resistivity one-tenth that of copper, but it can only exist in powder form, not in crystalline form. Adding organic polymers and heating them to melt can create thin films, but organic polymers are insulators, and the resistivity of wire films made by adding organic polymers and heating to melt is extremely high. Summary of the Invention:

[0003] Method for fabricating graphene coils for axial flux motors: Cut a steel wire to a predetermined length. Use hydraulic wire clamps to press copper wire lugs onto one end of the steel wire. Use lower hydraulic clamps to clamp the end of the steel wire with the copper wire lugs underneath. Cut a glass fiber tube or basalt ceramic fiber tube of suitable length to match the steel wire. Inject silicone rubber raw material solution into the glass fiber tube or basalt ceramic fiber tube using a syringe. Then immerse it in the silicone rubber raw material solution, remove it, dry it, and heat it to 150℃ to solidify the silicone rubber raw material solution into a glass fiber wax tube or basalt ceramic fiber wax tube. Wrap the glass fiber wax tube or basalt ceramic fiber wax tube over the steel wire. Use upper hydraulic clamps to clamp the end of the steel wire without copper wire lugs on top and tighten the steel wire. Use an electric vibrator to vibrate the upper hydraulic clamps. Inject graphene powder into a glass fiber wax tube or a basalt ceramic fiber wax tube. Once the tube is full, release the upper hydraulic clamp. Use hydraulic wire clamps to press the copper wire lugs onto the upper end of the steel wire, ensuring both lugs are in contact with the graphene powder. Release the lower hydraulic clamp. Install the graphene wire with the glass fiber wax tube or basalt ceramic fiber wax tube into the stator core slot of the axial flux motor. Place the axial flux motor stator core with the graphene coil into the medium-frequency electromagnetic ceramic heating furnace and cover it with the sealing cap. Introduce nitrogen gas at a pressure of 2 MPa into the medium-frequency electromagnetic ceramic heating furnace and apply alternating current to the furnace coil. Heat the axial flux motor stator core and graphene coil above 220°C to solidify the graphene. Then stop applying alternating current to the furnace coil and stop introducing nitrogen gas at a pressure of 2 MPa. After the medium-frequency electromagnetic ceramic heating furnace cools down, the stator core of the axial flux motor containing the graphene coil is removed from the medium-frequency electromagnetic ceramic heating furnace.

[0004] During use, when alternating current is applied to the graphene coil of the axial flux motor, due to the skin effect of the graphene coil, the current only flows through the surface of the graphene coil, and no current flows through the steel wire inside the graphene coil.

Claims

1. A method for fabricating a graphene coil for an axial flux motor, characterized in that: Cut a steel wire to the desired length. Use hydraulic wire clamps to press the copper wire lugs onto one end of the steel wire. Use the lower hydraulic clamps to clamp the end of the steel wire with the copper wire lugs underneath. Cut a glass fiber tube or basalt ceramic fiber tube of the same length as the steel wire. Inject the silicone rubber raw material solution into the glass fiber tube or basalt ceramic fiber tube using a syringe. Then immerse it in the silicone rubber raw material solution, remove it, dry it, and heat it to 150°C to solidify the silicone rubber raw material solution into a glass fiber wax tube or basalt ceramic fiber wax tube. Wrap the glass fiber wax tube or basalt ceramic fiber wax tube over the steel wire. Use the upper hydraulic clamps to clamp the end of the steel wire without the copper wire lugs on top and tighten the steel wire. Use an electric vibrator to vibrate the upper hydraulic clamps to inject graphene powder into the glass fiber wax tube or basalt ceramic fiber wax tube. Wait until the glass fiber wax tube or basalt ceramic fiber wax tube is full of graphene powder. After removing the graphene powder, release the upper hydraulic clamp and use the hydraulic wire clamp to press the copper wire lugs onto the upper end of the steel wire, ensuring both copper wire lugs are in contact with the graphene powder. Release the lower hydraulic clamp and install the graphene wire with the glass fiber wax tube or basalt ceramic fiber wax tube into the stator core slot of the axial flux motor. Place the axial flux motor stator core with the graphene coil into the medium-frequency electromagnetic ceramic heating furnace, cover it with the sealing cover, and introduce nitrogen gas at a pressure of 2 MPa into the medium-frequency electromagnetic ceramic heating furnace. Apply alternating current to the coil of the medium-frequency electromagnetic ceramic heating furnace to heat the axial flux motor stator core and graphene coil to over 220°C, solidifying the graphene. Then, stop applying alternating current to the coil of the medium-frequency electromagnetic ceramic heating furnace and stop introducing nitrogen gas at a pressure of 2 MPa into the medium-frequency electromagnetic ceramic heating furnace. After the medium-frequency electromagnetic ceramic heating furnace cools down, remove the axial flux motor stator core with the graphene coil from the medium-frequency electromagnetic ceramic heating furnace.