AC-DC converter triggered by variable frequency pulses
US4719552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Nov 14, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for producing a direct voltage from a sinusoidal input voltage comprising a filter for suppressing interference voltages, a rectifier, a switched mode power supply part and a pulse generator. The pulse generator produces from the rectified input signal switching pulses for the switched mode power supply part. The frequency of these pulses is varied so that it is a minimum at the maximum value of the rectified input voltage and is a maximum at the minimum value and is varied between the extreme values so that the second derivative of the frequency with respect to time is always zero or negative. A switching pulse is terminated when a signal proportional to the output current of the rectifier exceeds the difference between a signal proportional to the rectified input voltage and an integrated signal proportional to the output current of the rectifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.