Multi-Cell Power Converter With Distributed Output for High Current
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current power conversion technologies face challenges in efficiently supplying high currents to electronic loads such as CPUs and GPUs, due to space constraints and limitations in power dissipation, especially at the point of load.
Innovation Solution
The development of a power converter with a distributed output structure, utilizing a multi-layer printed circuit board with magnetically permeable core structures and winding elements that pass through magnetic paths, allowing for efficient current distribution and reduced output resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional power supply structures are used, then space requirements are met, but current delivery capability and efficiency deteriorate
Solution Approach 1:
The power converter is divided into multiple cell elements (first, second, third, fourth cell elements) with distributed output structures. Each cell element contains switching elements and windings that operate independently yet contribute to the overall power delivery, enabling high current capability while maintaining compact footprint through parallel current paths.
Solution Approach 2:
The patent utilizes multi-layer PCB construction with windings arranged in different layers and orientations. The first and second windings are arranged in first and second directions respectively, creating three-dimensional current distribution that increases power density without proportionally increasing planar area.
2Power
If power dissipation limits are imposed, then thermal management is improved, but current supply capability deteriorates
Solution Approach 1:
Multiple cell elements with distributed outputs divide the total power dissipation across several independent switching elements and conduction paths. This segmentation reduces the power dissipation burden on individual components, improving thermal management while maintaining high aggregate current supply capability.
Solution Approach 2:
The patent combines multiple cell elements with parallel switching elements (first and second switching elements in first cell, third and fourth switching elements in second cell) to achieve current multiplication. The merged output of all cell elements delivers high current while each individual element operates within safe power dissipation limits.
3Power
If multi-layer PCB structure with distributed windings is used, then output resistance is reduced, but device complexity increases
Solution Approach 1:
The multi-layer PCB structure utilizes vertical stacking of windings in different layers, with first windings in first direction and second windings in second direction. This three-dimensional arrangement reduces current path length and parasitic resistance without requiring proportional increases in planar area, achieving low output resistance through spatial optimization rather than component proliferation.
Solution Approach 2:
The magnetically permeable core structure serves multiple functions simultaneously: it provides magnetic coupling for voltage transformation, establishes distributed winding paths for low resistance, and acts as a structural backbone for mounting switching elements. This multi-functionality reduces the need for separate components, managing device complexity while achieving low output resistance.
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 enables the efficient delivery of high currents with reduced specific output resistance, improving converter performance and efficiency while minimizing space and thermal management issues.
Implementation Method 1
A magnetically permeable core structure may include a number, Np, of magnetic paths, each passing through the first and second conductive layers in at least two leg locations
Implementation Method 2
A first winding may have a first winding element formed in the first conductive layer that passes through the Np magnetic paths between the respective leg locations
Data Source
AI summary
An improved distributed-output multi-cell-element power converter utilizes a multiplicity of magnetic core elements, switching elements, capacitor elements and terminal connections in a step and repeat pattern. Stepped secondary-winding elements reduce converter output resistance and improve converter efficiency and scalability to support the high current requirements of very large scale integrated (“VLSI”) circuits.