Power Distribution Unit with Configurable Thresholds for Rapid Fault Isolation
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Solution Overview
Problem
Large-scale server networks face issues with slow reaction times of conventional fuses and relays, power losses in relays, and concurrent loss of multiple servers connected to a single power distribution unit, leading to inefficiencies and increased cooling needs.
Innovation Solution
A power distribution unit (PDU) with configurable power thresholds for each output connector, sensing power levels, and disconnecting power when thresholds are exceeded, using sensors and relays to minimize power loss and enable rapid response to faults, along with visual indications and power line communication for user control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fuses are used to protect circuits, then protection function is provided, but reaction time is slow and replacement is required after short-circuit
Solution Approach 1:
The patent replaces conventional mechanical fuses with electronic circuitry including current sensors, microcontrollers, and solid-state switching devices. This substitution enables rapid electronic detection and response to overcurrent conditions, eliminating the slow thermal-mechanical response of traditional fuses and allowing for instantaneous protection without physical replacement.
Solution Approach 2:
The system implements automatic protection functionality where the PDU detects faults and autonomously disconnects affected circuits without requiring manual intervention or replacement of protective devices. The microcontroller continuously monitors current levels and automatically triggers disconnection when thresholds are exceeded, providing self-service protection.
2Reliability
If relays are used to protect servers from short-circuit, then protection is provided, but reaction time is very slow and power losses occur in relay contacts
Solution Approach 1:
The patent replaces mechanical relay contacts with solid-state electronic switching devices controlled by a microcontroller. This eliminates the resistive power losses inherent in relay contacts and removes the slow mechanical operation of relays, providing both energy efficiency and rapid response to fault conditions.
Solution Approach 2:
The system introduces a microcontroller as an intermediary between current sensing and circuit disconnection. This intermediary processes sensor data, makes intelligent decisions about fault conditions, and controls solid-state switching devices, replacing the direct mechanical relay operation and enabling both rapid response and energy efficiency.
3Ease of operation
If multiple servers are connected to a single power distribution unit, then power distribution is achieved, but concurrent loss of multiple servers may occur when PDU fails
Solution Approach 1:
The patent divides the PDU into multiple independently protected output circuits, each with its own current sensing and protection logic. This segmentation ensures that a fault in one circuit does not propagate to other circuits, allowing individual server protection while maintaining power distribution to unaffected servers. Each circuit operates independently with isolated protection mechanisms.
Solution Approach 2:
The system implements continuous current monitoring on each output circuit with feedback to a central microcontroller. This feedback mechanism allows the PDU to detect fault conditions in real-time and selectively disconnect only the affected circuit while maintaining power supply to other healthy circuits, preventing concurrent server loss through intelligent fault isolation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces power losses, enhances reaction times, and prevents concurrent server failures by dynamically managing power delivery, thus improving efficiency and reducing cooling requirements in large-scale server networks.
Implementation Method 1
A relay connecting the output connector to a source of AC power. The relay is responsive to a disabling signal to disconnect the output connector from the source of AC power.
Implementation Method 2
A sensor senses a level of power delivered to the load via the output connector.
Data Source
AI summary
A method of limiting a total power delivered by a power distribution unit having a plurality of output connectors is disclosed. A configurable power threshold is assigned for each of the output connectors so that a sum of the configurable power thresholds of the output connectors does not exceed a maximum rated power for the power distribution unit. A power level of a given output connector is sensed. A delivery of power by the given output connector is stopped when the power level of the given output connector exceeds the configurable power threshold for the given output connector. Power delivery may be resumed in response to receiving a user command to rearm the given output connector. A power distribution unit adapted to limit its total power delivery is also disclosed.