Improving the accuracy of a volt-second clamp in an isolated dc/dc converter

Improving the accuracy of a volt-second clamp in an isolated dc/dc converter

A system for controlling a circuit having a transformer arranged between input circuitry and output circuitry to galvanically isolate the output circuitry from the input circuitry comprises a power switch controlled to apply voltage to the transformer, a switch control circuit responsive to a differ...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: HAWKES, CHARLES EDWARD
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:A system for controlling a circuit having a transformer arranged between input circuitry and output circuitry to galvanically isolate the output circuitry from the input circuitry comprises a power switch controlled to apply voltage to the transformer, a switch control circuit responsive to a difference between a variable control value and a variable reference value to control the power switch so as to control the voltage applied to the transformer, a control value generating circuit for producing the control value as a function of the voltage applied to the transformer and an on-time of the switch, and a reference circuit for producing the reference value that varies as a function of the voltage applied to the transformer