Power supply apparatus and image forming apparatus
First Claim
Patent Images
1. A power supply apparatus, comprising:
- a first line and a secondary line to each of which an AC voltage is input;
a first capacitor arranged between the first line and the secondary line;
a voltage detection unit configured to detect the AC voltage;
a conversion element to be connected to the first line or the secondary line, the conversion element being configured to convert the AC voltage to be input to the first line or the secondary line into a current corresponding to the AC voltage;
a switch configured to switch between connection and disconnection of the voltage detection unit and the conversion element; and
a control unit configured to control the voltage detection unit and the switch,wherein when the control unit controls the switch to connect the voltage detection unit and the conversion element to form a current path between the first line and the secondary line through the voltage detection unit and the conversion element, the voltage detection unit detects the AC voltage between the first line and the secondary line to discharge an electric charge charged in the first capacitor through the current path.
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Abstract
The power supply apparatus includes first line and lines to each of which an AC voltage is input, a first capacitor arranged between the first and secondary lines, a voltage detection unit configured to detect the AC voltage, a conversion element to be connected to the first line or the secondary line, the conversion element being configured to convert the AC voltage to be input to the first line or the secondary line into a current corresponding to the AC voltage, a switch configured to switch between connection and disconnection of the voltage detection unit and the conversion element, and a control unit configured to control the voltage detection unit and the switch.
48 Citations
14 Claims
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1. A power supply apparatus, comprising:
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a first line and a secondary line to each of which an AC voltage is input; a first capacitor arranged between the first line and the secondary line; a voltage detection unit configured to detect the AC voltage; a conversion element to be connected to the first line or the secondary line, the conversion element being configured to convert the AC voltage to be input to the first line or the secondary line into a current corresponding to the AC voltage; a switch configured to switch between connection and disconnection of the voltage detection unit and the conversion element; and a control unit configured to control the voltage detection unit and the switch, wherein when the control unit controls the switch to connect the voltage detection unit and the conversion element to form a current path between the first line and the secondary line through the voltage detection unit and the conversion element, the voltage detection unit detects the AC voltage between the first line and the secondary line to discharge an electric charge charged in the first capacitor through the current path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image forming apparatus, comprising:
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an image forming unit configured to form an image on a recording material; a fixing unit configured to fix on the recording material the image formed on the recording material; and a power supply apparatus configured to supply power to the fixing unit, the power supply apparatus comprising; a first line and a secondary line to each of which an AC voltage is input; a first capacitor arranged between the first line and the secondary line; a voltage detection unit configured to detect the AC voltage; a conversion element to be connected to the first line or the secondary line, the conversion element being configured to convert the AC voltage to be input to each of the first line or the secondary line into a current corresponding to the AC voltage; a switch configured to switch between connection and disconnection of the voltage detection unit and the conversion element; and a control unit configured to control the voltage detection unit and the switch, wherein when the control unit controls the switch to connect the voltage detection unit and the conversion element to form a current path between the first line and the secondary line through the voltage detection unit and the conversion element, the voltage detection unit detects the AC voltage between the first line and the secondary line to discharge an electric charge charged in the first capacitor through the current path. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification