DISCHARGE DEVICE, POWER SUPPLY APPARATUS, AND DISCHARGE METHOD
First Claim
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1. A discharge device, comprising:
- a discharge unit configured to discharge a capacitor at a variable discharge current value on the basis of a voltage of a rectified signal obtained by full-wave rectifying an AC voltage input via an input filter including the capacitor; and
a cut-off detection unit configured to monitor the voltage of the rectified signal and to detect whether or not a power supply is cut off on the basis of a change of the voltage when the capacitor is discharged by the discharge unit at a specific discharge current value.
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Abstract
[Object]
[Solving Means] A discharge device includes a discharge unit and a cut-off detection unit. The discharge unit is configured to discharge a capacitor at a variable discharge current value on the basis of a voltage of a rectified signal obtained by full-wave rectifying an AC voltage input via an input filter including the capacitor. The cut-off detection unit is configured to monitor the voltage of the rectified signal and to detect whether or not a power supply is cut off on the basis of a change of the voltage when the capacitor is discharged by the discharge unit at a specific discharge current value.
13 Citations
12 Claims
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1. A discharge device, comprising:
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a discharge unit configured to discharge a capacitor at a variable discharge current value on the basis of a voltage of a rectified signal obtained by full-wave rectifying an AC voltage input via an input filter including the capacitor; and a cut-off detection unit configured to monitor the voltage of the rectified signal and to detect whether or not a power supply is cut off on the basis of a change of the voltage when the capacitor is discharged by the discharge unit at a specific discharge current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power supply apparatus, comprising:
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an input filter including a capacitor; a converter configured to convert an AC voltage input via the input filter into a DC voltage; a full wave rectifier unit configured to full-wave rectify the AC voltage input via the input filter; a discharge unit configured to discharge the capacitor at a variable discharge current value on the basis of a voltage of a rectified signal obtained by the full wave rectifier unit; and a cut-off detection unit configured to monitor the voltage of the rectified signal and to detect whether or not a power supply is cut off on the basis of a change of the voltage when the capacitor is discharged by the discharge unit at a specific discharge current value.
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12. A discharge method, comprising:
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monitoring a voltage of a rectified signal obtained by full-wave rectifying an AC voltage input via an input filter including a capacitor; discharging the capacitor at a specific discharge current value of variable discharge current values on the basis of the voltage of the rectified signal; and detecting whether or not a power supply is cut off on the basis of a change of the voltage of the rectified signal when the capacitor is discharged by the discharge unit at the specific discharge current value.
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Specification