Circuitry for resetting magnetic field of transformer
US6744642B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2003 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | May 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer reset circuit includes a first capacitor serially connected to a transformer winding, a rectifier connected in parallel with the first capacitor and the transformer winding, a second capacitor, an auxiliary switch connected in series with the second capacitor to form a series circuit connected in parallel with the rectifier, and a switch control circuit. The switch control circuit can turn on the main switch and turn off the auxiliary switch to release magnetizing energy stored in an inductor to charge the first capacitor. The auxiliary switch can be turned on and the main switch can be turned off to transfer the magnetizing energy stored in the inductor and the energy stored in the first capacitor to the second capacitor. After the energy stored in the inductor is dissipated, the second capacitor charges the inductor and the first capacitor to reverse the magnetic field in the inductor so as to reset the transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.