Power Distribution Unit Switching Modules for Server Cabinets
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Solution Overview
Problem
The high cost of server cabinets is attributed to the large size and increased number of power supply units (PSUs) due to the numerous automatic transfer switching (ATS) elements and connectors required for handling 3-phase AC power sources, leading to excessive costs as the number of PSUs increases.
Innovation Solution
The server system incorporates a power distribution unit (PDU) with reduced switching modules and connectors, allowing for efficient switching between two power sources, thereby reducing the number of switches and connectors needed, and optimizing the connection of multiple PSUs to a single PDU, which decreases the overall size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each PSU includes six ATS elements to handle 3-phase AC power sources, then the power switching capability is improved, but the size of the PSU becomes bigger
Solution Approach 1:
The patent divides the ATS function into two separate locations: the PDU contains switching modules that perform initial power source selection, and each PSU contains fewer ATS elements (one per phase) that perform final selection. This segmentation reduces the number of ATS elements within each PSU, thereby reducing PSU size while maintaining the overall power switching capability of the system.
Solution Approach 2:
The PDU acts as an intermediary device between the power sources and the PSUs. It includes switching modules that pre-process the power selection, reducing the burden on individual PSUs. This intermediary function allows PSUs to have fewer ATS elements while still achieving the required power switching capability through the combined action of PDU and PSU switching elements.
2Power
If the number of PSUs increases to support more servers, then the power supply capacity is improved, but the number of connectors increases and cost becomes too high
Solution Approach 1:
The PDU is designed as a universal platform that can serve multiple PSUs simultaneously. It includes multiple switching modules that can distribute power from either power source to multiple PSUs in a coordinated manner. This multi-functionality allows the system to support increased power supply capacity by adding PSUs without proportionally increasing the number of connectors, as the PDU's switching modules handle the complex connection management centrally.
3Reliability
If each PDU is connected with a first power source and a second power source for redundancy, then the system reliability is improved, but the number of switching modules increases
Solution Approach 1:
The patent combines multiple switching functions into integrated switching modules located in the PDU. Each switching module handles the connection between power sources and PSUs, and multiple modules work together to manage redundant power sources. By merging the switching functions into centralized modules rather than distributing complex switching logic across multiple PSUs, the system achieves high reliability through redundant power sources while controlling the overall number of switching modules through efficient design.
Data Source
AI summary
A lower-cost power distribution apparatus (PDU) using a lesser number of components that connects with many power supply units. The PDU comprises first and second switching modules, for outputting AC from a first or a second power source. The first switching module and the second switching module automatically switch between opposite states (turned on or turned off) based on the AC power source. At a given instant, the first switching module and the second switching module are in opposite states.