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US 4,532,449 AGranted
DC motor
AssigneeCanon Kabushiki Kaisha
InventorKanemasa Aoki
Life of this patent
Estimating the term…
Abstract
A DC cored motor in which the rotor core has an odd number of slots to accept a corresponding number of coils which are connected to a commutator with a doubled number of segments, characterized by a combination of 2n+1 slots with 2n magnetic poles in the field magnet, wherein n is an integer equal to or larger than 2.
Claims3
A DC cored motor comprising a motor case, a rotary shaft supported by the motor case
- an iron core armature fixed on the rotary shaft and having 2n+1 equally spaced protruding iron poles, where n is a whole number equal to or greater than 2;
- said protruding iron poles respectively supporting armature coils, each armature coil being wound around a respective protruding pole with no overlapping of said coils;
- a field magnet arranged around the outside of said armature coils and having 2n equally spaced poles;
- a commutator mounted on said rotary shaft and divided into 2(2n+1) commutator segments for supplying said armature coils with electric power through a commutator brush;
- each alternate commutator segment being connected to one end of each of two coils which are separated from each other by an intermediate coil;
- and
- each commutator segment being electrically connected to another commutator segment displaced therefrom by 180.degree. around said commutator.
4 more elements
Dependencies are inferred from the claim text.