PDU Outlet Pin Connection Schema for Load Balancing
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Solution Overview
Problem
Conventional power distribution units (PDUs) face challenges in simplifying electrical connections, reducing manufacturing costs, and improving assembly efficiency, particularly in three-phase systems where load balancing and cable management are complex and costly.
Innovation Solution
An improved outlet pin connection schema utilizing multiple bus wires that can be wave soldered, featuring offset pins for different phases, allowing for simplified assembly and reduced manual labor, and enabling efficient load balancing by interconnecting uninsulated wires between outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional PDU designs are used with traditional wiring methods, then electrical connections can be established, but manufacturing costs are high and assembly time is long due to complex hand soldering processes
Solution Approach 1:
The patent replaces manual hand soldering with automated wave soldering technology. The bus wires are positioned in designated slots and automatically soldered to multiple outlets simultaneously, eliminating the need for time-consuming manual soldering operations while ensuring consistent connection quality. This substitution of manual mechanical work with automated welding technology directly addresses both high manufacturing costs and long assembly times.
Solution Approach 2:
The patent implements pre-configured bus wire slots and pre-positioned bus wires that are prepared before the soldering process. The bus wires are already routed and positioned in their final locations, with connection points pre-established at each outlet. This preliminary preparation allows the automated wave soldering process to proceed efficiently without requiring complex real-time positioning, thereby reducing both manufacturing complexity and assembly time.
2Ease of operation
If traditional wiring schemas are used in three-phase systems, then power distribution can be achieved, but load balancing is complex and cable management is difficult
Solution Approach 1:
The patent employs asymmetric bus wire routing where different bus wires (L1, L2, L3 phases and neutral) follow distinct paths through the PDU. Each phase bus wire is routed separately through designated channels, allowing independent optimization of each phase's electrical path. This asymmetric arrangement simplifies load balancing by providing clear separation of phases and enables easier cable management through organized routing paths that prevent tangling and interference.
Solution Approach 2:
The patent divides the electrical connection system into segmented bus wires for each phase (L1, L2, L3) and neutral, with each phase having its own dedicated routing path. This segmentation allows independent management and balancing of each phase's load, simplifying the complexity of three-phase power distribution. The segmented approach also improves cable management by preventing phase wires from interfering with each other.
3Reliability
If manual soldering processes are used, then electrical connections can be made, but reliability is reduced due to human error and inconsistency
Solution Approach 1:
The patent replaces manual soldering operations with automated wave soldering technology that consistently applies solder at standardized temperatures and speeds. The automated process eliminates human variability in soldering technique, ensuring uniform connection quality across all outlets. The process parameters (temperature, solder flow rate, contact time) are precisely controlled, significantly improving connection reliability while maintaining ease of manufacture through automation.
Solution Approach 2:
The patent implements standardized soldering parameters including controlled solder wire diameter, consistent soldering temperature, and fixed soldering speed for the wave soldering process. These parameter standardizations ensure that every electrical connection is made under identical optimal conditions, eliminating the variability inherent in manual soldering. The standardized parameters are built into the automated process, ensuring repeatable high-reliability connections across all production units.
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
This solution reduces manufacturing costs, improves reliability by eliminating hand soldering, and enhances assembly efficiency, while providing convenient load balancing and simplified cable management in three-phase systems.
Implementation Method 1
allows for simplified electrical connections within a PDU by utilizing multiple bus wires with the ability to wave solder these buss wires after they are installed on receptacles
Data Source
AI summary
A power distribution unit including an elongate housing and a power input penetrating said elongate housing. The power input can comprise a ground buss wire, a neutral buss wire and at least one line buss wire. A plurality of electrical outlets can be disposed along the housing. Each electrical outlet can comprise a receptacle and a plurality of spaced apart outlet pins protruding from the receptacle. The plurality of outlet pins can include a ground outlet pin receiving the ground buss wire, a neutral outlet pin receiving the neutral buss wire, and a line outlet pin receiving the line buss wire.