High-Voltage Changeover Switch Segmented Contacts
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Solution Overview
Problem
Existing high-voltage components lack the necessary voltage-resistant performance, ability to handle high pulse currents, and stability to enable automatic switching of different operating voltages for dual-energy or multi-energy electron accelerator systems, which are essential for generating electron beam streams with varying energies.
Innovation Solution
A high-voltage automatic changeover switch with an insulating frame, motor-controlled high-voltage contacts, and limit switches, designed to maintain contact reliability and facilitate automatic switching, featuring a U-shaped insulating frame, spring guide posts, and conductive rotors with silver or gold coating, capable of withstanding voltages up to 50 KV and currents of at least 500 A.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional high-voltage components are used, then the system structure is simple, but the voltage-resistant performance is insufficient and cannot handle high pulse currents
Solution Approach 1:
The switch structure is segmented into multiple independent high-voltage contacts (at least four contacts) arranged on insulating plates, with each contact handling specific voltage levels. This segmentation allows the system to achieve high voltage resistance through distributed contact architecture while maintaining manageable structural complexity
Solution Approach 2:
An insulating frame with insulating plates is introduced as an intermediary component to isolate high-voltage contacts from each other and from the motor drive mechanism. This intermediary structure enables high voltage resistance by providing electrical isolation while allowing mechanical actuation through the insulating barrier
2Extent of automation
If manual switching is used, then the device complexity is low, but the switching speed and automation capability are insufficient
Solution Approach 1:
The manual mechanical switching operation is replaced with an automated motor-driven rotation mechanism. The motor rotates the insulating frame to bring different high-voltage contacts into connection with the output terminal, achieving automatic switching controlled by electrical signals rather than manual mechanical operation
Solution Approach 2:
The switch transitions from a static manual configuration to a dynamic automated system where the insulating frame and contacts rotate to different positions based on control signals. This dynamic capability enables automatic switching between different voltage levels while the motor provides the necessary mechanical motion
3Volume of stationary object
If high-voltage contacts are placed close together to reduce size, then the device volume is reduced, but the voltage-resistant performance deteriorates
Solution Approach 1:
The high-voltage contacts are arranged in a two-dimensional configuration on separate insulating plates rather than linearly in one dimension. This spatial arrangement in multiple dimensions allows adequate creepage and clearance distances to be maintained between contacts while keeping the overall switch volume compact through efficient use of three-dimensional space
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 provides a high-voltage automatic changeover switch that ensures reliable voltage resistance, automatic switching, and stability, enabling the generation of electron beam streams with different energies, thereby enhancing the capabilities of industry non-destructive testing, custom container inspection, and high-energy CT systems.
Implementation Method 1
a motor is provided on the support and, when switching the high voltages, the control circuit board control the rotation of the motor to fulfill the automatically switching of the high-voltage contact pair
Implementation Method 2
a compression spring is sheathed on each spring guide post, one end of which is fixed onto the plate and the other is fixed to said high-voltage contacts
Implementation Method 3
the rotors and the high-voltage contacts may be made of a material having a good electrically conductive performance and may be coated with silver or gold
Data Source
AI summary
A high-voltage automatic changeover switch, includes a support and a control circuit board mounted on the support. In one embodiment, the support includes an insulating frame, four high-voltage contacts mounted on each of two opposite plates of the insulating frame, four high-voltage contacts on the same plate being pair-to-pair arranged, the high-voltage contacts at the corresponding positions on the two plates being pair-to-pair arranged. A motor is provided on the support, and when switching the high voltages, the control circuit board controls the rotation of the motor to automatically switch the connection relation between the high-voltage contact pairs. Embodiments of the switch have a voltage-resistance of above 50 KV, allowing a pulse current of not less than 500 A to pass through, and good contact performance and a high stability. In one aspect, the high-voltage automatic changeover switch performs automatic switching of power source high voltages in an accelerator system, so that the accelerator obtains electron beams with different energies, thus allowing an expanded scope of application of the accelerator, including updating and upgrading of non-destructive testing systems, custom container inspection systems, and high-energy CT systems.