Patent ID: 8319516
Filing Date: 2012-11-27
Classification: G01R

Abstract:
1. A circuit for testing an inrush current of a power supply, the circuit comprising: a capacitor module capable of storing electric charge supplied by a power source; a voltage meter connected to the capacitor module and capable of measuring a voltage across the capacitor module; a semiconductor switch capable of connecting the capacitor module to the power supply, the semiconductor switch being closed when the voltage across the capacitor module reaches a predetermined value; a current meter capable of measuring the inrush current at the time the power supply is powered on; a discharging circuit connected to the capacitor module in parallel and comprising a second resistor and a second switch connected in series; and the discharging circuit is capable of discharging remaining electric energy of the capacitor module after the inrush current is measured when the second switch is closed; the semiconductor switch is a thyristor; and an anode terminal of the thyristor is connected to a positive terminal of the capacitor module, a cathode terminal of the thyristor is connected to the current meter, and a gate terminal of the thyristor is connected to a capacitor.