Component for an electric machine with a polymer coating, and method for coating a component
A component for an electric machine includes a flat region in which an electric line runs when the component is integrated into the electric machine and which includes a sharp-edged structure. A polymer layer adheres to the flat region without further aid such as to mask the sharp-edged structure and thereby protect from damage the electric line on the flat region. The polymer layer is made of cured plastic adhesive and jetted onto the flat region in the form of threads, such that the threads are spin-coated on top of one another in the form of overlapping loops and form a network structure which spans the sharp-edged structure.
1. A component for an electric machine, comprising:
a flat region in which an electric line runs when the component is integrated into the electric machine and which includes a sharp-edged structure; and
a polymer layer adhering to the flat region without further aid such as to mask the sharp-edged structure and thereby protect from damage the electric line on the flat region, said polymer layer being made of cured plastic adhesive and jetted onto the flat region in the form of threads, such that the threads are spin-coated on top of one another in the form of overlapping loops and form a network structure which spans the sharp-edged structure.
2. The component of claim 1 , wherein the component is embodied as a stator including a winding overhang on a connection side, said flat region being arranged on an end winding of the winding overhang, with a section of the electric line lying on the flat region and fixed to the winding overhang by the polymer layer.
3. The component of claim 2 , wherein the polymer layer covers the section of the electric line.
4. The component of claim 2 , wherein the plastic adhesive is jetted in the form of threads onto the flat region containing the section of the electric line lying thereon, such that the threads are spin-coated on top of one another in the form of overlapping loops and form a network structure.
5. The component of claim 1 , wherein the component is embodied as a stator or a rotor or a housing.
6. The component of claim 1 , wherein the plastic adhesive is a thermoplastic hot melt adhesive.
7. The component of claim 6 , wherein the thermoplastic hot melt adhesive is a polyolefin or a polyamide.
8. An electric machine, comprising a component, said component comprising a flat region in which an electric line runs when the component is integrated into the electric machine and which includes a sharp-edged structure, and a polymer layer adhering to the flat region without further aid such as to mask the sharp-edged structure and thereby protect from damage the electric line on the at least one flat region, said polymer layer being made of cured plastic adhesive and jetted onto the flat region in the form of threads, such that the threads are spin-coated on top of one another in the form of overlapping loops and form a network structure which spans the sharp-edged structure.
9. The electric machine of claim 8 , wherein the component is embodied as a stator including a winding overhang on a connection side, said flat region being arranged on an end winding of the winding overhang, with a section of the electric line lying on the flat region and fixed to the winding overhang by the polymer layer.
10. The electric machine of claim 9 , wherein the polymer layer covers the section of the electric line.
11. The electric machine of claim 9 , wherein the plastic adhesive is jetted in the form of threads onto the flat region containing the section of the electric line lying thereon, such that the threads are spin-coated on top of one another in the form of overlapping loops and form a network structure.
12. The electric machine of claim 8 , wherein the component is embodied as a stator or a rotor or a housing.
13. The electric machine of claim 8 , wherein the plastic adhesive is a thermoplastic hot melt adhesive, in particular a polyolefin or a polyamide.
14. The electric machine of claim 8 , wherein the component is embodied as a housing and the flat region is embodied as a region of the housing with an aperture, and further comprising an electric line runs through the aperture, wherein the polymer layer including the cured plastic adhesive spans and seals the aperture and adheres both to the electric line and to the housing.
15. A method for creating a polymer layer adhering to a flat region of a component of an electric machine, with an electric line running on the flat region when the component is integrated into the electric machine and the flat region including a sharp-edged structure, said method comprising:
creating with a nozzle a thread of a thermoplastic hot melt adhesive; and
while the thread is created, moving the nozzle in such a way that the thread is applied onto the flat region in layers and covering the whole area so that the thread is spin-coated in the form of overlapping loops, in order to form a network structure, with the network structure spanning the sharp-edged structure in order to protect from damage the electric line on the flat region.
16. The method of claim 15 , wherein the thread is applied in the form of slings.
17. The method of claim 15 , wherein the thermoplastic hot melt adhesive is fed to the nozzle at an operating pressure of between 1 bar and 10 bar.
18. The method of claim 15 , wherein the thermoplastic hot melt adhesive is fed to the nozzle at an operating temperature of between 180° C. and 220° C.
19. The method of claim 15 , wherein the thermoplastic hot melt adhesive is applied fully automatically.
20. The method of claim 15 , wherein the thermoplastic hot melt adhesive is applied fully automatically using a robot.