Circuit configuration and method for measuring and limiting currents
US6975495B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jan 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit configuration and a method for determining a current drawn from a mains by a converter through a dc voltage intermediate circuit, replaces a required pulse-resistant input current measuring resistor with a conductor track of the circuit configuration itself. Since the input current drawn from the mains by the dc voltage intermediate circuit is on average equal to the output current delivered to the converter, the present resistance of the conductor track is given by the resistance of the measuring resistor downstream of the dc voltage intermediate circuit, weighted with the quotient of the input and output voltage drops. In that way, the mains current and therewith the power factor can be influenced by way of a current limiter without requiring an expensive pulse-resistant special resistor for mains current measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.