Thomson Coil Potting Assembly for Uniform Insulation and Level Windings
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Solution Overview
Problem
Existing methods for manufacturing insulation layers for Thomson coils result in non-uniform thickness and uneven coil windings due to the unraveling tendency of conductors, affecting the performance of Thomson coil actuators in circuit breakers.
Innovation Solution
An insulation manufacturing assembly comprising a base plate, coil housing, and cover plate with ribs and flow passages that securely hold the Thomson coil in place during the application of epoxy, ensuring even distribution and level windings through high-pressure injection or potting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a potting process is used to apply insulation material to the Thomson coil, then the insulation layer can be formed on the coil surface, but the insulation layer has non-uniform thickness and the coil windings become uneven
Solution Approach 1:
The Thomson coil is pre-positioned in a fixture that holds it in a fixed, stable position before the insulation material is applied. This preliminary positioning prevents the coil from moving or unraveling during the potting process, ensuring that the insulation layer forms uniformly and the windings remain even.
Solution Approach 2:
A fixture or support structure is introduced as an intermediary between the Thomson coil and the potting process. This intermediary device secures the coil in place, preventing unraveling and ensuring uniform insulation application without directly modifying the coil itself.
2Manufacturing precision
If the Thomson coil is held in a fixed position during insulation material application, then uniform insulation layer can be achieved, but the process requires complex positioning and fixing mechanisms
Solution Approach 1:
The fixture uses flexible or simple structural elements that can adapt to the coil shape while providing sufficient holding force. This reduces the complexity of the positioning mechanism while still achieving the required precision for uniform insulation application.
Solution Approach 2:
The Thomson coil's own structure is utilized to facilitate positioning. The coil's geometry and inherent properties are leveraged to enable easy fixation in the fixture, reducing the need for complex external positioning mechanisms.
3Productivity
If conventional potting processes are used for large-scale manufacturing, then production efficiency can be maintained, but the insulation layer quality becomes inconsistent
Solution Approach 1:
The coil is pre-positioned and secured in a standardized fixture before the potting process begins. This preliminary action ensures that every coil, regardless of manufacturing batch, starts from the same stable position, leading to consistent insulation layer quality across large-scale production while maintaining efficient throughput.
Solution Approach 2:
The fixture design is universal and can accommodate Thomson coils of standard sizes. This multi-functional fixture can be used repeatedly for different coils in large-scale manufacturing, ensuring consistent positioning and insulation quality without requiring complex reconfiguration for each unit.
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
Facilitates the production of Thomson coils with uniform insulation layers, enhancing the performance and reliability of Thomson coil actuators by maintaining consistent magnetic field control and ultra-fast motion.
Implementation Method 1
the magnetic field generated by the flow of current through the coil exerts a repulsion force on the conductive plate, driving the conductive plate away from the Thomson coil
Implementation Method 2
during which all exposed areas of the Thomson coil are coated by liquid epoxy
Implementation Method 3
The cover plate has several ribs that hold multiple turns of a Thomson coil in place while epoxy is applied to the coil
Data Source
AI summary
An assembly for manufacturing the insulation layer of a Thomson coil includes a base plate, a coil housing, and a cover plate. The base plate securely seats the coil housing, and the coil housing securely seats a Thomson coil and the cover plate. The cover plate has several ribs that hold multiple turns of a Thomson coil in place while epoxy is applied to the coil, thus ensuring that the epoxy is evenly distributed on the coil surface and that the coil windings remain level. The cover plate and coil housing are structured to either receive a high-pressure epoxy injection or to be used in an epoxy potting process, during which all exposed areas of the Thomson coil are coated by liquid epoxy. After the epoxy has solidified, the Thomson coil is coupled to the coil housing, and the housed and insulated Thomson coil is removed from the assembly.