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. 24, 2012
Filed:
Aug. 07, 2006
Shigeru Abe, Saitama, JP;
Hiroyoshi Kaneko, Saitama, JP;
Shigeru Abe, Saitama, JP;
Hiroyoshi Kaneko, Saitama, JP;
National University Corporation Saitama University, Saitama, JP;
Abstract
[Problems] To provide a non-contact power feeder that is high efficient and high power factor and has no load dependence. [Means for Solving Problems] A series capacitor Csis connected to a primary windingdriven by an AC power supplyand a parallel capacitor Cpis connected to a secondary winding. The capacitance Cp is set to Cp≈1/{2πf×(x+x)} and the capacitance Cs converted to the primary side is set to Cs≈(x+x)/{2πf×(x×x+x×x+x×x)}, where fis the frequency of the power supply, xis a primary leakage reactance of the primary winding, xis a secondary leakage reactance of the secondary windingconverted to the primary side and xis an excitation reactance converted to the primary side. By setting Cp and Cs to the above values, the transformer of the non-contact power feeder is substantially equivalent to an ideal transformer. If it is driven by a voltage type converter, the output voltage (=load voltage) becomes substantially constant voltage regardless of the load. In case of a resistive load (ZL=R), the power factor of the power supply output always remains 1 even if the load may vary.