Method for anticipatory control of a switched-mode power supply for compensating for fluctuations in feed voltage and circuit configuration for performing the method
US5386187A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switched-mode power supply for compensating for fluctuations in a feed voltage includes at least one electronic switch and a control circuit with a frequency generator, a comparator circuit, and a trigger circuit. The trigger circuit furnishes a trigger signal for the electronic switch as a function of an output signal of the comparator circuit and an output signal of the frequency generator. The comparator circuit has a switching threshold being defined as a function of a load current of the switched-mode power supply. The comparator circuit has a signal input being triggered with a periodically rising and falling control signal having a frequency defined by the frequency generator. The control signal has a signal shape being varied as a function of an instantaneous value of a feed voltage of the switched-mode power supply. In a method for anticipatory control of the power supply for compensating for feed voltage fluctuations, the control signal has a direct component and an alternating component, and only the direct component of the control signal is varied as a function of fluctuations of the feed voltage of the power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.