Detecting open connection of auxiliary winding in a switching mode power supply
US9559597B2 · kind B2 · utility
3Cited by
1References
16Claims
0Family size
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Key dates
| Filing date | Feb 27, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Feb 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter has a transformer including a primary winding coupled to an input voltage, a secondary winding coupled to an output of the power converter, and an auxiliary winding is configured to detect an open connection fault of the auxiliary winding. The power converter includes a current source coupled to the auxiliary winding that, when activated, supplies a current to the auxiliary winding. A controller measures a voltage across the auxiliary winding. Responsive to detecting an increase in the voltage across the auxiliary winding while the current source is activated, the controller disables the power converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.