Method for operating a switched mode power supply with return of primary-side stray energy
US8482941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2006 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Apr 4, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for operating a switched mode power supply as an isolating transformer. According to said method, magnetic energy is stored in the core of a transformer during a storage stage via a primary coil that is connected to an intermediate circuit current and the stored magnetic energy is delivered to a load in a subsequent discharge phase, for the most part by means of a secondary coil, a small part of said magnetic energy being discharged on the primary side. The energy that is discharged on the primary side charges a capacitor in such a way that the capacitor current is always held above the secondary current multiplied by the transmittance ratio of the transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.