US 12,451,787 B2
Electric motor
Walter Wesley Pennington, III, Menlo Park, CA (US); Matthew J. Rubin, Indianapolis, IN (US); Adam Daniel Ambrecht, Kennesaw, GA (US); and Gregory Gordon Stevenson, San Carlos, CA (US)
Assigned to Tau Motors, Inc., Redwood City, CA (US)
Filed by Tau Motors, Inc., Redwood City, CA (US)
Filed on Jun. 21, 2023, as Appl. No. 18/338,705.
Application 18/338,705 is a continuation of application No. 17/882,135, filed on Aug. 5, 2022, granted, now 11,870,319.
Application 17/882,135 is a continuation of application No. 16/963,950, granted, now 11,451,124, previously published as PCT/US2019/033811, filed on May 23, 2019.
Claims priority of provisional application 62/675,207, filed on May 23, 2018.
Prior Publication US 2023/0336065 A1, Oct. 19, 2023
Int. Cl. H02K 41/06 (2006.01); H02K 7/116 (2006.01); H02K 9/193 (2006.01)
CPC H02K 41/065 (2013.01) [H02K 7/116 (2013.01); H02K 9/193 (2013.01)] 31 Claims
OG exemplary drawing
 
1. An electric motor comprising:
an output shaft defining an axis of rotation;
a first nutating rotor rotationally coupled to the output shaft at a first tiltable connection;
a first stator mechanically coupled to the first nutating rotor by a first nutating traction interface, such that during nutation of the first nutating rotor with respect to the first stator a tilt axis of the first nutating rotor progresses about the axis of rotation of the output shaft,
wherein the first nutating rotor and a surface of the first stator are bound a radial dynamic air gap across which a first magnetic field is produced by electrical activation of the electric motor to generate a first force between the first nutating rotor and the first stator, and
wherein the first nutating traction interface and the radial dynamic air gap are arranged such that, in a plane containing the axis of rotation of the output shaft, the first nutating traction interface is angled with respect to the surface of the first stator bounding the radial dynamic air gap,
a second nutating rotor rotationally coupled to the output shaft; and
a second stator mechanically coupled to the second nutating rotor by a second tiltable connection,
wherein coils of the second stator are configured to be sequentially activated to cause the second nutating rotor to nutate about the axis of rotation of the output shaft, the first nutating rotor and the second nutating rotor transferring a cumulative torque.