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:
Apr. 15, 2003
Filed:
Apr. 30, 2001
Douglas J. Malone, Battleground, WA (US);
Precision Automation, Inc., Vancouver, WA (US);
Abstract
An AC-to-DC converter furnishing a regulated DC-output voltage from an AC-input supply voltage which is converted with a rectifier that utilizes, in at least two of its legs, IGBT (insulated gate bipolar transistor) devices, preferably of the kind that have no internal diodes. Also included in the converter of this convention is circuitry which tracks zero-crossing events relative to AC-input voltage for the purpose of establishing switching signals and times for such signals for operating the IGBT devices, and wherein thorough-safe operation is associated with malfunctioning of the zero-crossing tracking subcircuitry whereby a failure in that circuitry will result effectively in a shut down of the entire converter, and a bleed down to zero of DC-output voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile