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:
Feb. 21, 1989
Filed:
Dec. 24, 1986
Robert W Deutsch, Sugar Grove, IL (US);
Frank Karim, Hanover Park, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Disclosed is an electronic shaft synchronization system. The system employs a proportional integral controller for controlling the speed offset between two shafts approaching synchronization. The speed offset is determined by calculating an error signal representative of the shaft speed differences. Means for measuring the quality of the error signal is provided to allow the integrator to be initialized once the error signal reaches a first threshold. By initializing the integrator in this manner, the typical delay problem experienced with such integration is alleviated to allow a substantially faster synchronization between the shafts.