US 11,735,969 B2
High torque low inertia brushless motor
William R. Benner, Jr., Sorrento, FL (US)
Appl. No. 16/635,655
Filed by William R. Benner, Jr., Sorrento, FL (US)
PCT Filed Jul. 31, 2018, PCT No. PCT/US2018/044614
§ 371(c)(1), (2) Date Jan. 31, 2020,
PCT Pub. No. WO2019/028031, PCT Pub. Date Feb. 7, 2019.
Claims priority of provisional application 62/539,247, filed on Jul. 31, 2017.
Prior Publication US 2021/0126500 A1, Apr. 29, 2021
Int. Cl. H02K 3/16 (2006.01); H02K 1/16 (2006.01); H02K 21/14 (2006.01); H02K 1/2706 (2022.01); H02K 29/03 (2006.01)
CPC H02K 3/16 (2013.01) [H02K 1/165 (2013.01); H02K 21/14 (2013.01); H02K 1/2706 (2013.01); H02K 29/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A brushless motor comprising:
a stator defining an aperture extending axially therein, the stator further defining a series of slots, the series of slots consisting of first and second pairs of opposing slots, wherein the second pair of opposing slots are aligned orthogonally to the first pair of opposing slots;
a rotor having a two-pole diametral-magnetized magnet bidirectionally operable within the aperture, wherein a separation is formed between the magnet and the stator;
a cosine coil within the first pair of slots, wherein the cosine coil is excitable for providing bidirectional torque to the rotor over a first limited range of angles; and
a sine coil within the second pair of slots, wherein the sine coil is excitable for providing bidirectional torque to the rotor over a second limited range of angles that are orthogonal to the first limited range of angles provided by the cosine coil,
wherein a sequential excitation of the sine coil and the cosine coil results in continuous rotation of the rotor.