Restart of an AC-to-DC converter upon a temporary drop-out of an AC voltage
US12143030B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2022 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Sep 12, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/47214
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of converting an alternating current (AC) voltage to a direct current (DC) voltage by an AC-to-DC converter. The method includes producing an AC virtual waveform approximately synchronized to the AC voltage. The method further includes detecting a cessation of the AC voltage, continuing to produce the AC virtual waveform during the cessation of the AC voltage, and detecting a resumption of the AC voltage. Upon detecting the resumption of the AC voltage, the method includes applying the AC virtual waveform to a control loop implemented by the AC-to-DC converter for a period of time, and after the period of time, the method includes applying an output of a phase-locked loop to the control loop instead of the AC virtual waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.