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:
Dec. 18, 2012
Filed:
Nov. 12, 2010
Don Roy Sauer, San Jose, CA (US);
Don Roy Sauer, San Jose, CA (US);
Other;
Abstract
A split supply DC to DC converter is coupled through a low resistance path to a secondary coil of an ac line transformer, and is used as a high efficiency bidirectional AC to DC convertor. A small sense resistor is placed in series with the secondary in order to measure secondary current. The duty cycle of the DC to DC converter, which defines the voltage of what is normally treated as an output node, is modulated by the monitored secondary current. By coupling such an output node across the secondary coil, a voltage to current relationship is defined across the secondary to be that of a simulated resistor. Such a resistor will absorb power from the AC line and transfer it efficiently to the split supplies. The power transfer direction is reversed with the same efficiency by defining the current to voltage relationship to be one of a negative resistor.