Brushless motor system for power tools
AssigneeBlack & Decker Inc.
InventorsCraig A. OKTAVEC, David J. SMITH, Jarrett A. DUNSTON, Andrew M. PALICH, Michael R. MARJOMAA, Kevin L. PULLEY
Life of this patent
Estimating the term…
Abstract
A stator for a brushless DC (BLDC) motor includes a stator core having stator teeth extending radially inwardly towards a center bore, stator windings respectively wound around the stator teeth, and insulating inserts having substantially the same longitudinal length as the stator core. The insulating inserts are longitudinally received between adjacent stator windings at or near inner tips of the adjacent stator teeth to substantially seal the center bore of the stator assembly from the stator windings.
Claims20
A power tool including a tool housing and a brushless DC (BLDC) motor disposed within the tool housing, the motor having a stator assembly and a rotor assembly, the stator assembly comprising:
- a stator core having a plurality of stator teeth extending radially inwardly towards a center bore, wherein the center bore is arranged to rotatably receive the rotor assembly therein;
- a plurality of stator windings respectively wound around the plurality of stator teeth;
- and
- a plurality of insulating inserts having substantially the same longitudinal length as the stator core, the insulating inserts longitudinally received between adjacent stator windings at or near inner tips of the adjacent stator teeth to substantially seal the center bore of the stator assembly from the stator windings.
A brushless DC (BLDC) motor having a stator assembly and a rotor assembly, the stator assembly comprising, comprising:
- a stator core having a plurality of stator teeth extending radially inwardly towards a center bore, wherein the center bore is arranged to rotatably receive the rotor assembly therein;
- a plurality of stator windings respectively wound around the plurality of stator teeth;
- and
- a plurality of insulating inserts having substantially the same longitudinal length as the stator core, the insulating inserts longitudinally received between adjacent stator windings at or near inner tips of the adjacent stator teeth to substantially seal the center bore of the stator assembly from the stator windings.
Dependencies are inferred from the claim text.