Cylindrical Capacitor Connection Layout for Low Self-Inductance

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Solution Overview

Problem

Existing cylindrical capacitors face challenges in achieving low inductive properties and efficient parallel connection of stacked winding elements while allowing for variable winding geometries and universal use.

Innovation Solution

A cylindrical capacitor design featuring axially stacked winding elements with electrical contact surfaces connected by switching strips guided over the cylinder surface, utilizing two connecting discs and overlapping switching strips with insulating layers for parallel connection, and integrating connecting terminals for optimized electrical properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If cylindrical surface segments are used for electrical connections, then inductive properties are reduced, but manufacturing complexity increases due to tool-bound 3D molded parts

Engineering Contradiction:

Improveinductive propertiesVSAvoidmanufacturing flexibility

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The electrical connection system is segmented into modular components: connecting discs with radially extending connection elements that can be independently manufactured and assembled. This segmentation allows each component to be optimized separately, reducing inductance through precise geometric design while enabling flexible manufacturing of individual parts that are then assembled into the complete connection system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from planar connection layouts to three-dimensional spatial arrangements of connection elements. Connection elements extend radially from connecting discs in multiple dimensions, creating optimized current paths that reduce inductance. This dimensional approach allows connection elements to be positioned in space to minimize loop areas while maintaining manufacturing flexibility through modular assembly.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If overlapping busbars are used to connect winding elements, then inductance is reduced, but device complexity increases

Engineering Contradiction:

ImproveinductanceVSAvoidconnection structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The connection structure is divided into discrete connection elements radiating from connecting discs, rather than using continuous overlapping busbars. Each connection element is a separate, manufacturable component that can be precisely positioned to optimize current paths and minimize inductance, while the modular nature reduces overall structural complexity compared to integrated overlapping busbar assemblies.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Connecting discs serve as intermediary components that facilitate electrical connections between winding elements. These discs with radially extending connection elements act as mediators that simplify the connection architecture, replacing complex overlapping busbar arrangements with a more manageable disc-based system that achieves low inductance through optimized radial current paths.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If 3D molded connection segments are used, then electrical connection is achieved, but adaptability to variable winding geometries is lost

Engineering Contradiction:

Improveelectrical connectionVSAvoidgeometric adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The connection system is segmented into standardized connecting discs with radially extending connection elements that can be manufactured using conventional processes. This segmentation creates modular, adaptable components that can be configured for different winding geometries by varying the number, position, and orientation of connection elements, while maintaining reliable electrical connections through standardized disc-based interfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connecting disc design with radially extending connection elements serves as a universal interface that can accommodate various winding geometries and configurations. The same basic disc structure can be adapted to different applications by modifying connection element arrangements, making the system versatile across multiple geometries while ensuring reliable electrical connections through the standardized disc interface.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12542243B2Cylindrical capacitor

Publication Date: 2026.02.03 ELECTRONICSON KONDENSATOREN

AI summary

A cylindrical capacitor consists of a plurality of cylindrical winding elements which are stacked one on top of the other in the cylinder axial direction and have electrical contact surfaces on their end faces, the contact surfaces being connected to switching strips leading over the cylinder lateral surface and to at least one connection terminal in each case. Two substantially circular first and second connection discs are provided, which are adapted to the cylinder diameter and are electrically and mechanically isolated by an insulating element, wherein the first of the connection discs is electrically connected directly to a contact surface, lying in the direction of the connection terminal, of an upper cylindrical winding element.