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US 5,191,257 AGranted
Armature of DC motor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTakeshi Sugiyama
Life of this patent
Estimating the term…
Abstract
The present invention relates to an armature of a wave winding type for a D.C. motor wherein the number of commutator bars is reduced to half the number of slots in the armature coil. Each armature winding is formed by interconnecting two coils at a common front head portion and includes four straight portions accommodated in separate slots with connecting end portions being secured, respectively, to two commutator bars.
Claims4
An armature for a direct current motor, said armature comprising:
- an armature core including a predetermined number of slots formed therein;
- half as many commutator bars as said predetermined number of slots;
- at least one wave winding type armature coil, said at least one wave winding type armature coil comprising a pair of separate, interconnected coils inserted in said slots, said coils being interconnected at a common front head portion, separated by a distance of two magnetic poles over said armature core, and equal in polarity;
- and
- said at least one wave winding type armature coil further comprising upper and lower connecting leg portions at opposite ends thereof, respectively, for connecting said at least one, wave winding type armature coil to said commutator bars.
2 more elements
Dependencies are inferred from the claim text.