Patent ID: 9042133
Filing Date: 2015-05-26
Classification: H02H,H02M,H03H

Abstract:
1. A power source circuit comprising: a pair of power supply lines; a ground line; a power conversion circuit converting an alternating voltage inputted through the pair of power supply lines into a direct current voltage by a switching operation; and an excess current protection element provided on a one of the pair of power supply lines, wherein a series circuit comprising a first line bypass capacitor and a resistor serially connected is arranged between the ground line and the one of the pair of power supply lines, a second line bypass capacitor is arranged between the ground line and the other of the pair of power supply lines, capacitances of the first and second line bypass capacitors are set to be substantially equal, and a resistance value r [Ω] of the resistor meets a relation: L [H] is an inductance value of the excess current protection element, and C [F] is a capacitance value of one of the first and second line bypass capacitors.