US 11,837,926 B2
Brushless DC motor with stator teeth having multiple parallel sets of windings
Barak N. Gohn, Shrewsbury, PA (US); Colin M. Crosby, Baltimore, MD (US); Nicholas J. Lowe, Lutherville-Timonium, MD (US); James R. Clarke, York, PA (US); Daniel F. Heck, Toms River, NJ (US); Michael P. Sikora, Baltimore, MD (US); Christian B. Rogerson, Towson, MD (US); Ryan F. Schroeder, Hampstead, MD (US); Connor T. Mohan, Fallston, MD (US); and Michael D. Grove, Windsor, PA (US)
Assigned to BLACK & DECKER, INC., New Britain, CT (US)
Filed by Black & Decker Inc., New Britain, CT (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,289.
Claims priority of provisional application 63/129,797, filed on Dec. 23, 2020.
Prior Publication US 2022/0200426 A1, Jun. 23, 2022
Int. Cl. H02K 21/12 (2006.01); H02K 1/27 (2022.01); H02K 1/28 (2006.01); H02K 3/46 (2006.01); H02K 5/16 (2006.01); H02K 7/14 (2006.01); H02K 1/16 (2006.01); H02K 1/276 (2022.01); H02K 9/06 (2006.01); H02K 3/52 (2006.01); H02K 21/16 (2006.01); H02K 11/33 (2016.01); H02K 3/28 (2006.01); H02K 11/215 (2016.01); B25F 5/00 (2006.01)
CPC H02K 21/12 (2013.01) [H02K 1/16 (2013.01); H02K 1/165 (2013.01); H02K 1/27 (2013.01); H02K 1/276 (2013.01); H02K 1/28 (2013.01); H02K 3/28 (2013.01); H02K 3/46 (2013.01); H02K 3/522 (2013.01); H02K 5/16 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01); H02K 11/33 (2016.01); H02K 21/16 (2013.01); B25F 5/001 (2013.01); H02K 11/215 (2016.01); H02K 2203/03 (2013.01); H02K 2213/03 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A power tool comprising:
a housing; and
a motor disposed within the housing, the motor including a stator assembly and a rotor assembly including a rotor supporting a plurality of magnets rotatable relative to the stator assembly, wherein the stator assembly includes a stator comprising a stator core and a plurality of stator teeth radially extending from the stator core and defining a plurality of slots therebetween, a first plurality of stator windings wound on the plurality of stator teeth, and a second plurality of stator windings wound on the plurality of stator teeth such that, on each stator tooth, one of the first plurality of windings is provided electrically in parallel to one of the second plurality of stator windings,
wherein the stator assembly further comprises a plurality of stator terminals provided between respective plurality of stator teeth in the circumferential direction of the stator, wherein a first stator winding of the first plurality of stator windings and a second winding of the second plurality of stator windings that are wound on the same stator tooth are commonly electrically coupled to two of the plurality of stator terminals immediately adjacent said stator tooth to create a parallel connection between the first stator winding and the second stator winding.