Modular Rack PDU Integration for Space-Saving Phase-Balanced Power
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Solution Overview
Problem
Conventional power distribution units (PDUs) for rack-mounted power trays occupy excessive space, require numerous power cables, complicate cable management, interfere with serviceability and cooling, and are costly to develop for varying international power requirements, while also struggling with phase current balancing in three-phase power feeds.
Innovation Solution
A modular power distribution unit (PDU) with a compact design that minimizes power cables, integrates electronic or electro-mechanical circuit breakers for phase balancing, and attaches directly to power trays using fasteners, distributing power efficiently and reducing the need for multiple connectors and cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional PDU designs are used, then power distribution is achieved, but rack space is excessively occupied and cable management is complicated
Solution Approach 1:
The patent merges the PDU and power tray into a single integrated unit, eliminating the need for separate PDUs and multiple power cables. The integrated design consolidates power distribution functions within the power tray structure itself, reducing rack space occupation and simplifying cable management by minimizing the number of cables required.
Solution Approach 2:
The power tray is designed to perform multiple functions: it serves as both the mechanical support structure for power supply units and as the power distribution unit itself. The integrated design allows the power tray to distribute power directly to multiple PSUs without requiring external PDUs, achieving multi-functionality that reduces overall system complexity.
2Ease of operation
If conventional PDU designs are used, then power distribution is achieved, but serviceability and cooling are interfered with
Solution Approach 1:
By integrating the PDU functions into the power tray structure, the patent eliminates separate PDU components that would obstruct access to power supply units. The merged design allows direct access to PSUs for maintenance and service while maintaining power distribution capabilities, thereby improving serviceability without adding structural complexity.
3Reliability
If conventional multiple PDUs are used for rack power systems, then power distribution is achieved, but phase current balancing on three-phase power feeds is difficult to achieve
Solution Approach 1:
The integrated power tray design incorporates built-in phase balancing capabilities through its internal power distribution architecture. The single integrated unit can directly manage three-phase power feeds and distribute them balancedly to multiple PSUs, eliminating the need for complex configurations of multiple separate PDUs to achieve phase current balancing.
4Adaptability or versatility
If new PDUs and power cables are developed for different countries, then international power requirements are met, but development and qualification costs increase
Solution Approach 1:
The integrated power tray design incorporates universal power input capabilities that can accommodate different international power requirements through configurable input sections. The design allows a single base platform to support various voltage and connector types required by different countries, eliminating the need to develop and qualify entirely separate PDU and cable systems for each market.
Solution Approach 2:
The power input section is designed as a separable or configurable component that can be adapted to different international standards without redesigning the entire power tray system. This segmentation allows flexible adaptation to local power requirements while maintaining the core integrated design, reducing development costs for international markets.
Data Source
AI summary
Implementations are described for a modular power distribution unit (PDU) for a rack-mountable power tray or power shelf. The modular PDU includes a housing defining an input face and an opposing output face, and a plurality of power cables extending to the input face. The modular PDU further includes one or more second power connectors arranged at the output face, and distribution circuitry configured to distribute power from a first power bus and a second power bus to the one or more second power connectors. The modular PDU further includes one or more fasteners configured to attach the output face of the housing to the face of the power tray or power shelf, wherein the one or more second power connectors are retained in a coupled configuration with the one or more first power connectors.