SYSTEM AND METHOD FOR AUTOMATED FAILURE DETECTION OF HOLD-UP POWER STORAGE DEVICES
First Claim
1. A fault detection circuit for detecting faults in a hold-up power storage device, the fault detection circuit comprising:
- a hold-up monitoring circuit connected to monitor output of the hold-up power storage device, wherein the hold-up monitoring circuit measures a duration of time that the hold-up power storage device provides sufficient power following a loss of normal power and detects faults based on the measured duration of time; and
a memory device connected to store the measured duration of time that the hold-up power storage device provides sufficient power following a loss of normal power.
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Abstract
A fault detection circuit is utilized to automatically detect faults in hold-up power storage devices. The fault detection circuit includes a hold-up monitoring circuit and a memory device. The hold-up monitoring circuit is connected to monitor output of the hold-up power storage device, wherein the hold-up monitoring circuit measures a duration of time that the hold-up power storage device provides sufficient power following a loss of normal power and detects faults based on the measured duration of time. The memory device is connected to store the duration of time measured by the hold-up power storage device following a loss of normal power
64 Citations
18 Claims
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1. A fault detection circuit for detecting faults in a hold-up power storage device, the fault detection circuit comprising:
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a hold-up monitoring circuit connected to monitor output of the hold-up power storage device, wherein the hold-up monitoring circuit measures a duration of time that the hold-up power storage device provides sufficient power following a loss of normal power and detects faults based on the measured duration of time; and a memory device connected to store the measured duration of time that the hold-up power storage device provides sufficient power following a loss of normal power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of detecting faults in a hold-up power storage device, the method comprising:
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detecting a loss of system power; starting a timer in response to the detected loss of system power; monitoring power supplied by the hold-up power storage device; stopping the timer in response to the monitored power supplied by the hold-up power storage device decreasing below a threshold value; and detecting a fault in the hold-up power storage device based on a duration of the timer value. - View Dependent Claims (10, 11, 12)
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13. A power supply system comprising:
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a power supply circuit connected to receive system power at an input and to provide power at one or more outputs; a hold-up power storage device that receives charging power from an output of the power supply circuit during normal operation and provides power to the input of the power supply circuit in response to a loss of system power input; a power monitor circuit that monitors the system power and selectively connects the hold-up power storage device to the input of the power supply circuit in response to a detected loss of system power; and a fault detection circuit that monitors a duration of time the hold-up power storage device supplies power following a detected loss of system power, wherein a fault condition associated with the hold-up power storage device is detected if the monitored duration of time is less than a threshold value. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification