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:
Jun. 25, 2013
Filed:
Sep. 28, 2009
Raymond Mathew Clemo, Raleigh, NC (US);
Jamaica Laquay Barnette, Durham, NC (US);
Alfred L Burress, Raleigh, NC (US);
Randhir Singh Malik, Cary, NC (US);
Raymond Mathew Clemo, Raleigh, NC (US);
Jamaica LaQuay Barnette, Durham, NC (US);
Alfred L Burress, Raleigh, NC (US);
Randhir Singh Malik, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The Power Conversion Unit includes a single stage rectifier circuit that generates a DC voltage which is stored on a first capacitor. A circuit arrangement connected to the first capacitor monitors the DC voltage at the capacitor and other predefined signals to generate signals for smoothing ripples associated with the DC voltage and maintains the DC voltage at a predefined level for a predefined time interval. The holdup and smoothing voltages are generated by developing and storing a high voltage on a second capacitor. A switching device connected to the second capacitor causes energy to flow from the second capacitor into the primary winding of a transformer whose secondary winding are switched to deposit the energy stored in said transformer onto the first capacitor. A circuit for charging the second capacitor is also provided.