Direct current motor having E-shaped interpoles
AssigneeFujitsu Fanuc Limited
InventorsYoshinori Kohzai, Shigeaki Oyama, Tatsuo Koyama
Life of this patent
Estimating the term…
Abstract
A direct current motor having E-shaped interpoles, each of the E-shaped interpoles comprising interconnecting members which are made of a non-magnetic material having rigidity and which are tightly and irremovably inserted in gaps between a center pole and side poles of the E-shaped interpole. In the direct current motor according to the present invention, the side poles are mechanically interconnected to the center pole, so that noises generated by the vibration of the side poles are greatly reduced.
Claims4
A direct current motor comprising an armature having armature windings wound thereon and rotating around the central axis thereof, a plurality of main magnetic poles disposed around said armature having field windings wound thereon, and a plurality of E-shaped interpoles disposed at the intermediate position along the outer circumference of said armature between the adjacent magnetic poles, each of said E-shaped interpoles having two side poles and a center pole to which an interpole winding is wound, characterized in that each of said E-shaped interpoles further comprises interconnecting members which are made of a material having rigidity and which are tightly and irremovably wedged in gaps between said center pole and said side poles, thereby mechanically interconnecting said side poles to said center pole to prevent vibrations of the side poles.
Dependencies are inferred from the claim text.