System and method for controlling parallel legs in a switched mode power supply
US9612637B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2015 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Nov 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1586
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved system and method for controlling multiple, paralleled switching devices in a switching power supply is disclosed. The switching device includes parallel legs between voltage rails on the input where each leg is connected to a common output. Each leg may have a single switching device or pairs of switching devices. According to one embodiment of the invention, the switching device(s) for each leg is enabled during one carrier period and the leg having switching devices enabled is alternated during subsequent carrier periods. According to another embodiment of the invention, the switching device(s) for each leg are enabled during each carrier period; however, the switching device(s) for one leg are enabled within the carrier period prior to the switching device(s) for the other legs and the first leg to be enabled is alternated during successive carrier periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.