Patent ID: 9419506
Filing Date: 2016-08-16
CPC Classification: H02K,Y10T

Claim Text:
1. A direct-current motor, comprising: a cylindrical yoke having six magnetic poles; an iron core rotationally provided inside the yoke, the iron core having nine teeth arranged in a rotation direction; a first coil wound about each tooth in a forward direction; a second coil wound about each tooth in a reverse direction with respect to the first coil; a commutator for being rotated integrally with the iron core, the commutator having eighteen commutator pieces arranged in the rotation direction; and three sets of brushes retained inside the yoke, each set having a pair of brushes, wherein each set of the brushes supplies electricity to the first and second coils by sliding against corresponding commutator pieces, wherein the first and second coils provided on a same tooth are connected to the commutator pieces of a same phase such that the first and second coils are electrically connected to an arbitrary one of the brushes having a positive pole and an arbitrary one of the brushes having a negative pole simultaneously, wherein,