Phase feed-forward control for output voltage AC line ripple suppression in digital power supply
US9979306B1 · kind B1 · utility
2Cited by
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12Claims
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Key dates
| Filing date | May 17, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | May 17, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply has a first stage for performing AC-DC voltage conversion and power factor correction and a second stage for isolated DC-DC voltage conversion. The power supply includes a feed forward mechanism for transmitting phase information corresponding to AC ripple. The phase information is transmitted from the first stage to a secondary side of the second stage as a digital signal using a low speed optical coupler, where the phase information is utilized by a DC-DC digital controller to implement AC ripple suppression using both phase compensation and amplitude compensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.