Method for manufacturing a magnetic sheet and a stack of magnetic sheets and electric machine and electric vehicle
Various embodiments include a method for manufacturing a magnetic sheet comprising: positioning a nonmagnetic sheet with recessed regions; filling the recessed regions with a soft-magnetic material using additive manufacturing; and fixing the soft-magnetic material to the sheet in a material-bonded manner.
1. A method for manufacturing a stack of magnetic sheets, the method comprising:
fabricating individual non-magnetic sheets by punching and/or cutting, including creating recessed regions along a flat extension of the non-magnetic sheets;
filling the recessed regions of the fabricated individual sheets with soft-magnetic material by additive manufacturing to create material bonds at connection points;
tempering the filled individual sheets; and
stacking the tempered individual sheets.
2. The method according to claim 1 , wherein the additive manufacturing includes powder deposition welding, wire-based electric arc, cold metal transfer, or printing of particle-filled pastes.
3. The method according to claim 1 , wherein fabricating the individual non-magnetic sheets includes laser cutting, screen printing, or stencil printing.
4. The method according to claim 1 , further comprising arranging an electrically insulating material on at least one of the tempered individual sheets before stacking.
5. The method according to claim 1 , further comprising rolling the tempered individual sheets before stacking.
6. The method according to claim 1 , wherein stacking the tempered individual sheets includes positioning the respective filled recessed regions of the individual sheets without complete overlap.