Isolated power converter having primary feedback control
US6370039B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention comprises an isolated dual power supply having an internal feedback loop. The dual power supply comprises power converter responsive to an error signal for generating a DC internal regulated output voltage coupled to a DC/AC switching power converter having a transformer. The primary winding of the transformer is coupled to the DC internal output voltage and to one or more power switches. A control circuit drives the one or more power switches such that an alternating current having substantially a constant duty cycle flows through the primary winding. An error amplifier produces a control signal proportional to the difference of an output voltage at a load coupled to the secondary winding and a reference voltage equal to the maximum expected voltage losses at the load. The error signal is formed from a combination of the control signal and a signal proportional to the internal voltage output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.