US 12,249,869 B1
Permanent magnet electric motor
Michael G. Tkadlec, Oakdale, MN (US)
Assigned to Variant Motion Inc, Oakdale, MN (US)
Filed by Variant Motion Inc., Oakdale, MN (US)
Filed on Apr. 13, 2022, as Appl. No. 17/720,283.
Claims priority of provisional application 63/174,660, filed on Apr. 14, 2021.
Int. Cl. H02K 1/27 (2022.01); H02K 1/17 (2006.01); H02K 53/00 (2006.01)
CPC H02K 1/17 (2013.01) [H02K 1/27 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An electric motor comprising:
a central shaft;
a rotor configured to rotate about the central shaft, wherein the rotor includes a plurality of rotor permanent magnets arranged with a first polar orientation relative to the central shaft; and
a stator arranged proximate to the rotor, wherein the stator includes:
a plurality of stator permanent magnets arranged in a second polar orientation relative to the central shaft, wherein the plurality of stator permanent magnets are oriented to repel the rotor permanent magnets, and
a plurality of magnetic interruption devices (MIDs) corresponding to the plurality of stator permanent magnets,
wherein each MID includes an electromagnetic wire coil positioned adjacent the corresponding stator, and radially adjacent to the plurality of rotor permanent magnets
wherein the electromagnetic wire coil of each MID is configured to, in response to an electric current, generate an MID electric field to counteract an electric field of the corresponding stator permanent magnet, and
wherein the electromagnetic wire coil of each MID is without a core of iron or ferrite.