A capacitance voltage sensor and the method thereof used in capacitance charger

• Main Author: CHENG, YUAN-HUANG
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2006
• Subjects: 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; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

A capacitance charger transfers the primary coil voltage into secondary coil voltage by a transformer, in which a charging end is used to charge the capacitance element to attain a preset voltage, and a capacitance voltage sensor and method are used to detect the capacitance element voltage. Wherein a voltage-divider or a sensing current flowing through the resistance element is used to generates a feedback signal so that the capacitance charger stops charging as long as the voltage of the capacitance element is equal to or larger than the preset voltage and prevents backflow current from the capacitance element to the charging end. Therefore, the capacitance element is capable of avoiding possible electric leakage from the sensor device.