Power supply apparatus with improved efficiency
US5703763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Aug 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/348
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply apparatus including at least one coil and a controllable switching element and a peak-limiting circuit for limiting the maximum voltage across the switching element. The peak-limiting circuit includes a capacitor and a series connection of a first rectifier element and a resistor, as well as a second rectifier element which connects one end of the series connection to the positive input terminal of the apparatus. The energy dissipation in the resistor is dependent on the duty cycle of the switching element. The duty cycle in turn is dependent on the load of the power supply apparatus. Consequently, when the load of the power supply apparatus is small, the dissipation of the apparatus will be substantially lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.