UA91421U - Chernohorov electric motor - Google Patents

Abstract

A DC electric motor comprises a steel housing. Magnetic poles with excitation windings or constant magnets are fixed to said steel housing, a drum armature with collectors and a brush gear having a lap or wave winding. The magnetic poles of excitation system are screened by a magnetic screen laminated with electrotechnical steel or steel cast with following mechanical operation, rectangular cross section. There is an air gap between the magnetic screen and the armature, wherein the armature rotates. The armature for low-speed electric motor is laminated and made of electrotechnical steel, whose sheets are insulated. The drum armature of heavy-duty and large engine is composite, e.g. tooth area (recess area for winding laying) with circular back is stucked up as laminated from electrotechnical steel and fixed at metal disks rigidly coupled with a shaft in a manner that makes the shaft hollow. A brush yoker is made with a number of brushes on the collector equal to the number of magnetic poles of the excitation system, it can rotate (with fixing) up to 120° in both sides relative to the collector rotation. Any excitation circuits can be used for engines with electric excitation: parallel, series, combined and independent, separated from the armature electric circuits.