Sepic converter with transformerless line isolation
US5583421A · kind A · utility
21Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1557
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In DC-DC switching converters of the single-ended primary inductance (SEPIC) type, using a high frequency transformer to isolate the load from the AC power line is difficult because its leakage inductance causes serious circuit problems. In the invention, an additional coupling capacitor provides the required DC isolation without affecting circuit performance. The total coupling capacitance may be chosen to limit the power line frequency leakage current to a safe value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.