Apparatus and system for transformer frequency control
US8587972B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 21, 2011 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Jan 25, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and a system include a multiplier circuit for receiving a sensed voltage and current of a of a load resistance coupled to a rectified voltage from a transformer's output whose input is from a DC-to-AC converter being supplied from a DC power generator having an internal resistance. The multiplier outputs a product of the sensed voltage and current. A differentiator circuit outputs a rate of change of the product. An integrator circuit outputs an integrated voltage indicating an accumulative rate of change of the product. A voltage-to-frequency converter circuit generates a voltage waveform having a frequency determined by the integrated voltage. A driver circuit uses the voltage waveform to output a control signal for controlling a frequency of the DC-to-AC power converter where the apparatus substantially matches an input resistance of the transformer to the internal resistance, thereby maximizing power transfer to the load resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.