Prismatic Bus Block Power Delivery for Low Inductance
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Solution Overview
Problem
Conventional power supply structures face challenges in efficiently delivering power to densely populated server boards due to increased impedance and noise issues caused by long power feed paths and high inductance, which affect the operation of electronic components as they require more components and space to mitigate voltage fluctuations.
Innovation Solution
A power supply structure utilizing quadratic prism-shaped conductive blocks arranged alternately between the load and power supply boards to reduce inductance by opposing current directions, thereby minimizing impedance and noise, and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bus bars are disposed at the ends of boards and fixed with screws, then the connection between power supply board and load board is achieved, but the power feed path length increases and resistance value increases
Solution Approach 1:
The patent transitions from end-positioned bus bars to surface-mounted block-shaped conductors. By placing conductors on the board surface rather than at ends, and using vertical block structures instead of horizontal bus bars, the power feed path is shortened in the critical current flow direction while maintaining connection reliability through vertical contact with pads.
2Stability of the object's composition
If bus bars are fixed with screws at the ends of boards, then the power supply structure is stable, but the inductance component increases due to wide distance between power feeding bus bar and GND bus bar
Solution Approach 1:
The patent merges the power feeding conductor and GND conductor into a closely integrated structure. The block-shaped conductors are positioned adjacent to each other on the board surface, with power feeding blocks and GND blocks forming a compact unit that reduces the loop area and thus the inductance, while maintaining structural stability through pad connections.
3Object-affected harmful factors
If large amount of capacitors are mounted to suppress voltage fluctuation, then the power supply noise is reduced, but the number of components increases and space requirement increases
Solution Approach 1:
The patent extracts the noise suppression function from the traditional capacitor-based approach and implements it through the geometric arrangement of conductors. By taking out the reliance on external capacitors and instead using the intrinsic inductance reduction achieved through close positioning of power and GND conductors, the solution suppresses voltage fluctuation without adding components.
4Adaptability or versatility
If conventional power supply structure is used, then the existing board layout is maintained, but voltage drop and heat generation occur when large current is supplied
Solution Approach 1:
The patent changes the physical parameters of the power feed path by introducing block-shaped conductors with larger cross-sectional area and shorter path length. This parameter change reduces resistance and thus voltage drop and heat generation, while the block conductors can be positioned to adapt to various board layouts, maintaining versatility.
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 configuration effectively reduces power supply noise and allows for a more efficient and compact power delivery system, even under high current conditions, by minimizing inductance and maintaining low impedance.
Implementation Method 1
a block member that has includes prism-shaped conductive members arranged with a gap interposed therebetween and fixed, is held between the first plate member and the second plate member such that end faces of the conductive members are in contact with the first plate member and the second plate member, is connected to each of the first wiring and the second wiring such that current flows in a direction from the second plate member to the first plate member in one of two adjacent conductive members of the conductive members and that current flows in a direction from the first plate member to the second plate member in the other of the two adjacent conductive members of the conductive members
Implementation Method 2
utilizing quadratic prism-shaped conductive blocks arranged alternately between the load and power supply boards to reduce inductance by opposing current directions
Data Source
AI summary
A load board includes an electronic component and first wiring connected thereto. A power supply board includes a DC/DC converter and second wiring connected thereto. A bus block includes prismatic block-shaped conductors arranged with a gap interposed therebetween and fixed. The bus block is held between the first plate member and the second plate member such that the end faces of the block-shaped conductors are in contact with the load board and the power supply board. The bus block is connected to the first wiring and the second wiring such that current flows in a direction from the power supply board to the load board in one of two adjacent block-shaped conductors and that current flows in a direction from the load board to the power supply board in the other block-shaped conductor.