Current fed regulated voltage supply
US4698740A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1986 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Feb 14, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0087
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention is a locally isolated regulated power supply providing a regulated dc power output from an ac current source having a large dynamic range. The power supply comprises an ac-to-dc converter for providing a rectified dc output from an ac current input. The converter includes a current transformer in combination with a rectifier. The current transformer has a saturable magnetic core for receiving primary and secondary windings. The current transfomer produces a reduced secondary output voltage that is a function of the ac system current characterized by the decreased coupling between the core and secondary winding as the core approaches saturation during substantial increases in the ac system current. One or more secondary windings and associated circuitry can be provided. In addition, an electronically controlled switch or shunt having as inputs a predetermined reference voltage and the dc output voltage of the rectifier or a signal equivalent thereto is connected across the converter. The switch provides for the continual shunting of the converter whenever the dc output voltage is equal to or greater than the predetermined reference voltage. A voltage support capacitor …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.