Power Adapter Fault Detection via Periodic Current Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional power adapters for computing devices often fail to detect device faults that consume power within normal operating limits but result in dangerous heat levels, as current limiting circuits do not detect faults below the upper current limit, potentially leading to hardware or firmware failures and safety issues.
Innovation Solution
Incorporating a low-current-limit component with a timer in the power adapter that requires the computing device to periodically reduce current draw below a threshold to prevent power shutdown, allowing the device to notify the adapter of normal operation and preventing undetected faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current limiting circuits are used to prevent overcurrent, then power delivery safety is improved, but device faults below the current limit go undetected
Solution Approach 1:
The patent implements periodic current draw reduction cycles where the computing device intentionally reduces its current consumption to a second level below a threshold current. This periodic action creates detectable patterns that allow the power adapter to distinguish between normal operation and device faults, resolving the contradiction between maintaining power delivery safety and improving fault detection capability.
Solution Approach 2:
The power adapter monitors the periodic current draw patterns from the computing device and uses this feedback to detect device faults. When the expected periodic current reduction pattern is not observed, the adapter identifies a potential fault condition. This feedback mechanism enables the system to maintain both safety and detection precision simultaneously.
2Use of energy by moving object
If current limiting circuits are used to prevent overcurrent, then power consumption control is improved, but heat generation from faults within current limits is not prevented
Solution Approach 1:
By implementing periodic current draw reduction cycles, the system creates temporal patterns in power consumption that distinguish healthy devices from faulty ones. Faulty devices that generate excessive heat within current limits fail to exhibit the expected periodic current reduction behavior, allowing the power adapter to identify and respond to these conditions while maintaining normal power consumption control.
Solution Approach 2:
The power adapter uses feedback from monitoring periodic current patterns to detect when a device is generating harmful heat despite staying within current limits. When the expected current reduction pattern is absent, the adapter interprets this as a fault condition and can take corrective action, thereby preventing heat-related damage while preserving energy consumption control.
3Duration of action of stationary object
If the power adapter continuously supplies power, then device operation is maintained, but device faults go undetected
Solution Approach 1:
The system maintains continuous power supply while implementing periodic current draw reduction cycles. During these periodic intervals, the computing device reduces current consumption below a threshold, creating detectable patterns without interrupting overall operation. This resolves the contradiction by enabling fault detection through periodic monitoring while maintaining continuous power delivery.
Solution Approach 2:
The computing device proactively reduces current draw during predefined periodic intervals before faults can develop or go undetected. This preliminary action of reducing current during monitoring intervals allows the power adapter to detect faults early while maintaining continuous operation, balancing uninterrupted power supply with reliable fault detection.
Data Source
AI summary
This disclosure describes techniques for detecting and recovering from faults in computing devices. The faults being detected may consume amounts of power within normal consumption parameters of the device, such as under upper-current protection limits of a power adapter. The power adapter may include components which prevent power from being supplied to the device if the current drawn by the device is not periodically reduced to less than a threshold amount of current. The device may include logic which causes the device to periodically reduce the current drawn from the power adapter to less than the threshold amount of current to reset a timer of the components of the power adapter. Thus, the device may periodically reduce the current drawn when the device is operating normally, but fail to reduce the current drawn when experiencing a fault, which results in the power adapter shutting off power to the faulted device.