High-Voltage Switch Insulation Layout for Low Inductance

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Solution Overview

Problem

High voltage electrical switching systems face a trade-off between rapid switching and preventing dielectric breakdown, as large insulating spacers required to prevent breakdown increase inductance and reduce switching efficiency.

Innovation Solution

An electrical switching arrangement with an insulation block and grooves for insulation members that reduces inductance and dielectric breakdown risk by positioning insulation members within the grooves, allowing conductors to be closer together while maintaining effective insulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a significantly sized insulating spacer is provided to prevent dielectric breakdown at high voltage, then the ability to prevent dielectric breakdown is improved, but the inductance of the system increases which reduces switching speed

Engineering Contradiction:

Improveability to prevent dielectric breakdownVSAvoidswitching speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The insulating spacer is segmented into multiple insulation members positioned at different locations (between electrodes and between terminals) rather than using a single large insulating spacer. This segmentation allows each insulation member to be optimized for its specific function while reducing the overall volume of insulating material required, thereby reducing inductance while maintaining dielectric breakdown prevention capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple insulation members are introduced as intermediary elements between the electrodes and terminals to provide distributed insulation. This intermediary approach allows the system to achieve the required dielectric strength through cumulative insulation effect while minimizing the distance between conductive elements, thus reducing inductance and improving switching speed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If insulating spacers are used to separate electrodes and terminals, then dielectric breakdown is prevented, but the electrodes and terminals are positioned further away from each other increasing inductance

Engineering Contradiction:

Improveprevention of dielectric breakdownVSAvoiddistance between electrodes and terminals

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The insulation function is segmented into multiple discrete insulation members placed at critical locations rather than using a continuous large insulating spacer. This allows the conductive elements to be positioned closer together while maintaining adequate insulation where most needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Insulation members are strategically positioned at specific locations where dielectric breakdown risk is highest (between electrodes and between terminals) rather than uniformly distributing insulation throughout the entire structure. This local quality approach provides maximum insulation effectiveness with minimum overall insulation volume.

Inventive Principle:

Principle #3Local quality

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

The solution enables efficient high voltage switching with reduced inductance and dielectric breakdown risk, allowing for rapid discharge of high voltage pulses while maintaining reliability and safety.

Implementation Method 1

an insulating spacer may be provided between the electrodes of the switch and between the different terminals (e.g. live and ground) of the high voltage system... to prevent dielectric breakdown

Methodology Applied

Scientific EffectDielectric insulation: Dielectric

Implementation Method 2

the grooves, with part of the insulation members located therein, help to reduce the risk of surface tracking across the face of the insulation block

Methodology Applied

Scientific EffectSurface tracking prevention:

Implementation Method 3

This may be detrimental to the operation of the system, for example when particularly fast switching is desired... The arrangement... reduces the inductance of the system

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS11894661B2Electrical switching arrangement

Publication Date: 2024.02.06 FIRST LIGHT FUSION LTD

AI summary

An electrical switching arrangement for an electrical power supply includes a live conductor. The live conductor includes electrodes for switching between first and second sides of the live conductor. The electrical switching arrangement also includes a ground conductor, an insulation block between the electrodes and the ground conductor, a first insulation member extending from the insulation block on the first side of the electrodes, and a second insulation member extending from the insulation block on the second side of the electrodes. The insulation block includes a first groove in which an edge of the first insulation member is located and a second groove in which an edge of the second insulation member is located.