Back to results
US 2022/0352791 A1Published application
Brush motor
AssigneeMabuchi Motor Co., Ltd.
InventorTadayuki WAKITA
Life of this patent
Estimating the term…
Abstract
A brush motor includes: a rotor core provided in a rotor; s teeth provided in the rotor core; s concentrated-winding coils with electric wires being respectively wound around the teeth; a commutator provided on the rotor in a relatively non-rotatable manner; c commutator pieces provided in the commutator and connected to the coils; p pairs of magnet magnetic poles provided on a stator and arranged to face the teeth; and a brush that is brought into sliding contact with the commutator pieces to supply a current to the coils, in which 0.5<p/s<1 and s<c.
Claims12
A brush motor comprising:
- a rotor core provided in a rotor;
- s teeth provided in the rotor core;
- s concentrated-winding coils with electric wires being respectively wound around the teeth;
- a commutator provided on the rotor in a relatively non-rotatable manner;
- c commutator pieces provided in the commutator and connected to the coils;
- p pairs of magnet magnetic poles provided on a stator and arranged to face the teeth;
- and
- a brush that is brought into sliding contact with the commutator pieces to supply a current to the coils,
- wherein following Inequality A and Inequality B hold:
- 0.5<p/s<1 (Inequality A);
- and
- s<c (Inequality B)
9 more elements
Dependencies are inferred from the claim text.