Variable Torque Low Inertia Brushless Motor
OwnerWilliam R. Benner, JR.inventor
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Abstract
Embodiments of a small brushless motor include a two-pole rotor and a stator having four slots into which electrical coils are placed. Additional embodiments of a small brushless motor include a two-pole rotor and stator having eight slots into which four, six, or eight electrical coils are placed. The stator may include a means for limiting cogging. The small brushless motor having a high torque constant, low coil resistance, low coil inductance, and high thermal conductivity is provided.
Claims40
A brushless motor comprising:
- a stator defining an aperture extending axially therein and eight slots, wherein the eight slots consist of four wide slots and four narrow slots, and wherein the four wide slots are arranged as first and second pairs of opposing wide slots, the first pair generally aligned orthogonally to the second pair, and wherein each of the four narrow slots are positioned between two wide slots.
A stator defining an aperture and a series of slots formed therein for use in a brushless motor, the stator comprising:
- a first pair of opposing wide slots configured for receiving a first electrical coil;
- a second pair of opposing wide slots configured for receiving a second electrical coil, the second pair of wide slots generally aligned orthogonally to the first pair of wide slots;
- and
- four narrow slots, wherein each narrow slot is positioned between two wide slots.
A slot guard for use with a brushless motor, the slot guard comprising:
- an electrically-insulating material defining an aperture extending axially therein and at least one slot extending therefrom.
Dependencies are inferred from the claim text.