Patent ID: 6737779
Filing Date: 2004-05-18
Classification: H02K

Abstract:
A commutator motor, comprising:an iron core having a center and a plurality of open-ended teeth extending radially from the center to form a plurality of slots between the open-ended teeth, each slot configured for coil winding; a rotation shaft inserted in a center of said iron core; a pair of first and second commutators mounted on said rotation shaft at opposite ends of said iron core; a first coil wire connected to the first commutator, and wound on bottoms of the slots of said iron core to provide an inner coil to form a first winding, said first winding comprising a first subwinding around a first set of opposing open-ended teeth and a second subwinding around a second set of opposing open-ended teeth, the second set of opposing commutator teeth being adjacent to the first set of opposing open-ended teeth; a second coil wire connected to the second commutator, and wound on said inner coil in the slots of said iron core to provide an outer coil at a side of the opened outer radial end of the slot; a first terminal that can be connected to a first power source to supply electric power of said first power source to said first coil wire through said first commutator; and a second terminal that can be connected to a second power source to supply electric power of said second power source to said second coil wire through said second commutator; wherein a diameter of said second coil wire is smaller than that of said first coil wire.