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:
Jan. 29, 1980
Filed:
Mar. 22, 1978
Michel Cailloux, Belfort, FR;
CGEE Alsthom, Levallois Perret, FR;
Abstract
The invention comes within the field thyristor bridge control. A device for controlling a Graetz rectifier bridge for driving a synchronous machine which operates at variable speed, it being connected to this machine by its AC terminals and its voltage at the terminals being substantially proportional to its frequency, characterized in that the firing pulses of each thyristor of the Graetz rectifier bridge come from the comparison of a control signal U.sub.c chosen as a function of the required firing angle .alpha. of the thyristor to be fired, with a sinusoidal phase reference curve whose amplitude is made independent from the operation frequency of the Graetz rectifier bridge. The invention applies in particular to the driving of synchronous rotating machines which operate at variable speed.