Process for operating a switching controller and switching controller functioning according to this process
US4864480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The operating process is based on the existance and cooperation of at least six functional units (64, 65, 66, 67, 68, 70), whereby the functional units (65, 66, 67) have a monitoring and control function. Functional units (64, 68, 70) together form the pause and frequency control circuit. Functional unit (65) monitors demagnetization of the transformer (2), functional unit (66) controls the time-averaged output current and functional unit (67) controls the output voltage of the switching controller. Functional unit (64) forms the voltage time-integral of the input voltage and functional unit (68) determines the target value of this voltage time-integral according to the pause duration determined. The process can be extended to monitoring the input voltage for the overshooting of a maximum value by a functional unit (71) and for under-shooting of a minimum value by a functional unit (72). A new switching phase can begin only if all functional units (65, 66, 67, 71, 72) having monitoring functions issue a release signal to an AND-gate controlling a bistable switch (70).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.