US 12,224,635 B2
Printed circuit board stator axial field rotary energy device with ferromagnetic yoke
Bahareh Anvari, Round Rock, TX (US); Paulo Guedes-Pinto, Round Rock, TX (US); and Randal A. Lee, Austin, TX (US)
Assigned to Infinitum Electric Inc., Round Rock, TX (US)
Filed by Infinitum Electric, Inc., Round Rock, TX (US)
Filed on May 2, 2022, as Appl. No. 17/734,790.
Prior Publication US 2023/0352999 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 21/24 (2006.01); H02K 3/26 (2006.01); H02K 9/19 (2006.01)
CPC H02K 3/26 (2013.01) [H02K 9/19 (2013.01); H02K 21/24 (2013.01); H02K 2203/03 (2013.01); H02K 2211/03 (2013.01)] 33 Claims
OG exemplary drawing
 
1. An axial field rotary energy device, comprising:
a housing;
a rotor coupled to the housing, the rotor comprising an axis of rotation and a rotor disk having magnets, and all of the magnets are co-planar with or parallel to each other;
a stator coaxial with the rotor, the stator comprising a printed circuit board (PCB) having conductive layers laminated together with layers of an insulating material, each conductive layer comprises coils that are configured to carry electrical current when connected to an external voltage source;
a ferromagnetic yoke coaxial with the rotor and stator, the ferromagnetic yoke is mechanically and thermally coupled to an exterior of the stator and to an interior of the housing to provide a path for magnetic flux produced by the magnet, and a path to conduct heat generated by the stator from the stator to the housing; and
the exterior of the stator is directly mechanically coupled to an interior of the housing on both inner and outer diameter sides of the ferromagnetic yoke.