Direct current motor having E-shaped interpoles

Details Direct current motor having E-shaped interpoles Direct current motor having E-shaped interpoles

1980-03-13

1982-07-06

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310224, H02K 110

Patent

active

043385354

ABSTRACT:
A direct current motor used, for example, in a machine tool, comprising an armature, a plurality of main magnetic poles disposed around the 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 main magnetic poles, each of the E-shaped interpoles consisting of a center pole to which an interpole winding is wound and two side poles, and the width of the gap between the outer circumference of the armature and the end surface of each of the side poles increases from the portion of the gap which is remote from the center pole to the portion of the gap which is adjacent to the center pole.
In the DC motor according to the present invention, the linearity of the magnetic flux used for commutation is ensured in a wide range of the armature current, and, therefore, commutating characteristics of the E-shaped interpoles is improved.

REFERENCES:
patent: 665586 (1901-01-01), Siemens
patent: 1523004 (1925-01-01), Doherty
patent: 3885302 (1975-05-01), Boesel

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