Auxiliary power supply apparatus and method for isolated power converters
US10644607B2 · kind B2 · utility
4Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.