Pulse width modulated power conversion apparatus and methods using capacitor-charge feedback
US6703817B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Mar 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter apparatus includes a transformer having a primary winding and a secondary winding, a switching circuit operative to couple and decouple the primary winding of the transformer to a power source, and a control circuit that controls the switching circuit. A feedback circuit is coupled to the output port of a power transfer network and to the control circuit. The feedback circuit generates a current responsive to an output voltage at an output port of a power transfer network, charges a capacitance responsive to the generated current, and intermittently discharges the capacitance responsive to a control signal generated by the control circuit. A modulator circuit is coupled to the feedback circuit and to the power transfer network, and selectively couples the secondary winding of the transformer to an input port of the power transfer network responsive to a voltage on the capacitance. The invention may be embodied as apparatus or methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.