Power supply device and image forming apparatus including the power supply device
AssigneeRicoh Company, Ltd.
InventorsTakuya Tanimura, Kazumasa Kiyonaga, Yoshiteru Hagiwara
Life of this patent
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Abstract
A power supply device is connectable to a commercial power supply to output power to a supply destination device. The power supply device includes a filter circuit and a switching unit. The filter circuit includes a capacitor unit. The switching unit is configured to switch a capacitor capacity of the capacitor unit.
Claims19
A power supply device connectable to a commercial power supply to output power to a supply destination device, the power supply device comprising:
- a filter circuit including a capacitor unit including at least a first capacitor;
- and
- a switch connected to the capacitor unit, the switch configured to vary a capacitance of the capacitor unit by selectively connecting the switch and the first capacitor in series between a first input node of a common coil of a choke and a second input node of the common coil of the choke such that the first capacitor is in parallel between the first input node and the second input node of the common coil of the choke, the common coil configured to remove common mode noise from input power by blocking common mode currents included in the input power from passing to the supply destination device.
A power supply device connectable to a commercial power supply to output power to a supply destination device, the power supply device comprising:
- a filter circuit including a capacitor unit including at least a first capacitor;
- and
- switching means connected to the capacitor unit, the switching means for varying a capacitor capacity of the capacitor unit by selectively connecting the switching means and the first capacitor in series between a first input node of a common coil of a choke and a second input node of the common coil of the choke such that the first capacitor is in parallel to between the first input node and the second input node of the common coil of the choke, the common coil configured to remove common mode noise from input power by blocking common mode currents included in the input power from passing to the supply destination device.
A power supply device connectable to a commercial power supply to output power to a supply destination device, the power supply device comprising:
- a filter circuit including a capacitor unit including at least a first capacitor;
- and
- a switch connected to the capacitor unit such that the switch and the first capacitor are selectively connected in series between a first input node of a common coil and a second input node of the common coil, the switch configured to vary a capacitance of the capacitor unit by selectively connecting the first capacitor in parallel to between the first input node and the second input node of the common coil.
Dependencies are inferred from the claim text.