Patent ID: 11967892
Assignee: OMRON CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A DC power supply device comprising:
a power supply unit configured to output a DC; and
a filter circuit configured to detect a voltage fluctuation or a current fluctuation of the DC output from the power supply unit and adjust an impedance of the filter circuit, such that a further voltage fluctuation or a further current fluctuation of the DC is prevented, based on a detection result,
wherein the filter circuit includes:
a series connection body of a capacitor and a variable resistance, the series connection body being disposed between a positive-side power line and a negative-side power line from the power supply unit; and
a controller that increases a resistance value of the variable resistance when a voltage or current fluctuation of the DC is above a first threshold value and decreases the resistance value when a state in which the voltage or current fluctuation of the DC continues to be below a second threshold value, considered to be stable, for a specified time.