Power supply apparatus, electrical equipment, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorShinichi Tobita
Life of this patent
Estimating the term…
Abstract
A power supply apparatus includes a first electric power-generating unit that generates an electric power with a first voltage, a second electric power-generating unit that generates an electric power with a second voltage that is higher than the first voltage, and an overcurrent monitoring circuit to which electric powers for operation are supplied from the first electric power-generating unit and the second electric power-generating unit and that monitors overcurrent in the second electric power-generating unit.
Claims14
A power supply apparatus that supplies a plurality of electric powers with different voltages, the power supply apparatus comprising:
- a first electric power-generating circuit that generates an electric power with a first voltage;
- a second electric power-generating circuit that generates an electric power with a second voltage that is higher than the first voltage;
- and
- an overcurrent monitoring circuit to which electric powers for operation are supplied from the first electric power-generating circuit and the second electric power-generating circuit and that monitors overcurrent in the second electric power-generating circuit,
- wherein the overcurrent monitoring circuit comprises:
- a current detecting unit that detects a current flowing from the second electric power-generating circuit into a load when the electric power with the second voltage is supplied to the load;
- and
- a comparing unit that outputs a stop signal for stopping generation of the electric power with the second voltage to the second electric power-generating circuit, when a level of a signal corresponding to the current which has been detected exceeds a predetermined value.
An electrical equipment comprising a power supply apparatus that supplies a plurality of electric powers with different voltages, wherein the power supply apparatus comprising:
- a first electric power-generating circuit that generates an electric power with a first voltage;
- a second electric power-generating circuit that generates an electric power with a second voltage that is higher than the first voltage;
- and
- an overcurrent monitoring circuit to which electric powers for operation are supplied from the first electric power-generating circuit and the second electric power-generating circuit and that monitors overcurrent in the second electric power-generating circuit,
- wherein the overcurrent monitoring circuit comprises:
- a current detecting unit that detects a current flowing from the second electric power-generating circuit into a load when the electric power with the second voltage is supplied to the load;
- and
- a comparing unit that outputs a stop signal for stopping generation of the electric power with the second voltage to the second electric power-generating circuit, when a level of a signal corresponding to the current which has been detected exceeds a predetermined value.
An image forming apparatus comprising a power supply apparatus that supplies a plurality of electric powers with different voltages, wherein the power supply apparatus comprising:
- a first electric power-generating circuit that generates an electric power with a first voltage;
- a second electric power-generating circuit that generates an electric power with a second voltage that is higher than the first voltage;
- and
- an overcurrent monitoring circuit to which electric powers for operation are supplied from the first electric power-generating circuit and the second electric power-generating circuit and that monitors overcurrent in the second electric power-generating circuit,
- wherein the overcurrent monitoring circuit comprises:
- a current detecting unit that detects a current flowing from the second electric power-generating circuit into a load when the electric power with the second voltage is supplied to the load;
- and
- a comparing unit that outputs a stop signal for stopping generation of the electric power with the second voltage to the second electric power-generating circuit, when a level of a signal corresponding to the current which has been detected exceeds a predetermined value.
Dependencies are inferred from the claim text.