High-Voltage Insulation Structure for Electron-Suppressed Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High voltage driving devices face challenges in maintaining stable insulation at high voltages, particularly when using solid insulators, as they can lead to improper insulation and electron generation issues due to strong electric fields.
Innovation Solution
A high voltage driving device is designed with a housing containing a cathode, an anode, and an insulation structure, where the first solid insulator with lower volumetric resistivity contacts the cathode and the second solid insulator with higher resistivity contacts the anode, both made from ceramic materials with varying titania doping concentrations, to achieve both volumetric and surface insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single solid insulator is used between cathode and anode, then insulation is maintained, but electron generation and charging phenomena occur due to strong electric fields at high voltage
Solution Approach 1:
The single solid insulator is divided into two separate insulators: a first solid insulator adjacent to the cathode and a second solid insulator adjacent to the anode. This segmentation allows each insulator to be optimized for its specific location, preventing electron generation at the cathode interface and reducing charging phenomena by distributing the electric field stress across two distinct insulating components
Solution Approach 2:
Different properties are assigned to different parts of the insulation system. The first solid insulator (near cathode) has specific properties optimized for withstanding electron bombardment and preventing electron generation, while the second solid insulator (near anode) has properties optimized for its local electric field conditions. This local optimization eliminates the harmful effects that occur when a uniform insulator is used throughout
2Power
If high voltage is applied between cathode and anode, then driving capability is improved, but insulation breakdown occurs due to strong electric fields
Solution Approach 1:
The insulation path is segmented into two series-connected insulators, which distributes the high voltage stress across both components. This allows the device to withstand higher voltages without insulation breakdown, as each insulator only needs to withstand a portion of the total voltage rather than the full high voltage
Solution Approach 2:
The insulation system uses a composite structure of two different solid insulators with complementary properties. This composite approach creates an insulation system that is more robust against high voltage stress than either insulator alone, enabling stable operation at high voltages of several tens to hundreds of kV
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 enhances insulation properties, suppressing electron generation and charging phenomena, allowing stable operation even at high voltages of several tens to hundreds of kV, as demonstrated by improved insulation performance in experimental tests.
Implementation Method 1
the first solid insulator has first volumetric resistivity less than second volumetric resistivity of the second solid insulator
Implementation Method 2
each of the first solid insulator and the second solid insulator may include a ceramic material having different volumetric resistivity
Data Source
AI summary
Provided is a high voltage driving device including a housing and a cathode, an anode, and an insulation structure, which are disposed in the housing. Here, the cathode and the anode are spaced apart from each other with the insulation structure therebetween. Also, the insulation structure includes a first solid insulator disposed adjacent to the cathode and a second solid insulator disposed adjacent to the anode. Also, the first solid insulator has first volumetric resistivity less than second volumetric resistivity of the second solid insulator, and the first solid insulator contacts the cathode.