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:
Sep. 11, 1979
Filed:
Dec. 20, 1977
Manfred Liska, Nurnberg, DE;
Hans Kuhnlein, Nurnberg-Grossgrundlach, DE;
Georg Kogler, Schwabach, DE;
Karl Schalk, Nurnberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A commutation device for controlling a brushless d-c motor is disclosed. The commutation device includes a regulator circuit for regulating current supplied to the motor by means of a transistor connected between the power source and a commutation circuit. A threshold hysteresis level detector controls the transistor. During current peaks generated in the commutation circuit, the hysteresis of the level detector is increased to provide stable operation of the regulator with different motors and operating voltages.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile