Low loss discharge circuits for EMI filter capacitors
US8541987B2 · kind B2 · utility
2Cited by
0References
20Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 30, 2010 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Apr 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge circuit for an EMI filter capacitor includes normally-ON transistors. The normally-ON transistors may be controlled to limit current through them when an AC source is coupled across the discharge circuit. When the AC source is disconnected from the discharge circuit, the normally-ON transistors turn ON to allow current flow through them. The current flow allows the EMI filter capacitor to be discharged by a discharge resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.