Annular Core Electrode Pulse Power Device for Stable Arc Discharge
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Solution Overview
Problem
Pulse power generating devices face issues with electrode deformation and erosion due to the impact force of arc discharge, leading to unstable arc discharge and reduced durability, as the electrode interval expands with increased shots, causing discharge failure and local damage.
Innovation Solution
The device features an annular high-voltage-side electrode and a core low-voltage-side electrode, where the core electrode is cantilever-supported and plastically deformed to maintain a stable arc discharge generation spot, preventing electrode interval expansion and promoting even erosion across the circumference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If rod-shaped electrodes with small diameter are used to reduce electrode area receiving impact, then impact force received by electrode decreases, but electrode interval still expands with increased shots
Solution Approach 1:
The electrode tip is segmented into multiple discharge spots arranged in an array pattern. Instead of a single concentrated discharge point, the discharge is distributed across multiple spots, which disperses the impact force and prevents localized electrode deformation and interval expansion.
2Power
If arc discharge is generated at a single spot to concentrate energy, then impact wave efficiency is high, but electrode erosion progresses locally and durability decreases
Solution Approach 1:
The electrode discharge surface is segmented into multiple discrete discharge spots arranged in an array. This segmentation distributes the arc discharge across multiple locations, preventing localized erosion while maintaining high power density at each spot, thus improving both impact wave efficiency and electrode durability.
Solution Approach 2:
The discharge spots are activated in a periodic or sequential manner across the array, allowing each spot to undergo periods of discharge and recovery. This periodic action distributes the cumulative erosion effect across multiple spots, extending electrode life while maintaining consistent power output.
3Strength
If electrodes are supported by elastic body to absorb impact force, then electrode durability is enhanced, but it is still difficult to withstand 10000 arc discharges or more
Solution Approach 1:
The electrode is designed with multiple discharge spots that segment the impact force reception. Instead of one location bearing the full brunt of repeated impacts, the force is distributed across multiple spots, significantly extending the electrode's service life beyond 10000 discharges.
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 significantly increases the number of shots without causing electrode deformation or erosion-related failures, ensuring stable and durable arc discharge generation.
Implementation Method 1
generates arc discharge between an inner peripheral portion of the annular electrode and an outer peripheral portion of the core electrode
Implementation Method 2
arc discharge is generated... to obtain an impact wave
Data Source
AI summary
To obtain an impact wave by generation of arc discharge between a high-voltage-side electrode 31 connected to a high-voltage-side terminal of a pulse power generating device and a low-voltage-side electrode 32 grounded or connected to a low-voltage-side terminal of the power source. One of the high-voltage-side electrode 31 or the low-voltage-side electrode 32 is an annular electrode formed in an annular shape, the other electrode is a core electrode arranged inside the annular electrode, and arc discharge is generated between an inner peripheral portion of the annular electrode and an outer peripheral portion of the core electrode.