The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1987
Filed:
Sep. 26, 1986
Rainer Fey, Schweinfurt, DE;
Gerhard Dumbser, Niederwerrn, DE;
Fichtel & Sachs AG, , US;
Abstract
An electromagnetic brake device for a sports training apparatus, especially an ergometer, includes a stator, and a rotor rotatable in relation to the stator about a rotation axis. The stator and the rotor each have multi-pole iron circuits which together form a magnetic flux circuit, one of the iron circuits having magnetic remanence properties. With the iron circuits, there are associated windings of which the winding allocated to the magnetically remanent iron circuit is formed as field winding and the other winding is formed as generator winding. The field winding is connected through a slip ring arrangement with the generator winding. With the iron circuit of the generator winding, there is associated a short-circuit winding. The size amplitude of the current fed to the field winding from the generator winding is adjustable by a control circuit. In this way, the electromagnetic brake moment of the brake device can be adjusted without wear.