Circuit for the infinite direct or indirect variation of the direct and/or alternating current flowing through a load operated by a mains DC or AC voltage or an arbitrary combination thereof
US5932934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1998 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Mar 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1555
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for continuously directly or indirectly varying a combination of direct and alternating current flowing through a load supplied with a combination of direct and alternating voltage from a public utility mains, has a low-pass filter that serves for achieving a continuously flowing input current I.sub.in, a coil that is connected in series with the load or is inherently contained in the load, a first alternating current switch that is connected parallel to the load and to the coil, a second alternating current switch connected in series with the load that can be driven with a higher switching frequency compared to the network frequency f.sub.network, and a regulator for the direct or indirect regulation of the direct and/or alternating current I.sub.load flowing through the load. The regulator has an acquisition part for the direct and/or indirect acquisition of the actual direct and/or alternating current I.sub.load,actual flowing through the load, a reference value input part for the direct or indirect input of the reference value of the direct and/or alternating current I.sub.load,ref. flowing through the load, and a drive part that switches the second alternating curren…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.