High Voltage Conductor Insulation via Continuous Curing
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Solution Overview
Problem
Current methods for insulating electrical conductors, such as coil wires and Roebel bars, are time-consuming, prone to void formation, and pose health and environmental hazards due to the use of liquid resins and mica tape impregnation processes.
Innovation Solution
An apparatus and method that applies a composition of thermosetting material and solid electrically insulating elements, like mica platelets, to the conductor using a treatment device with an application unit and a curing unit, forming a pool with constant pressure to ensure a homogeneous liquid composition and continuous curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mica tape and resin impregnation process is used, then electrical insulation is achieved, but the process becomes time-consuming and complex
Solution Approach 1:
The patent combines the insulation application and curing processes into a single integrated treatment device. The application unit applies insulation composition while the curing unit simultaneously cures it, merging multiple sequential operations into one continuous process, thereby reducing time and complexity while maintaining insulation reliability
Solution Approach 2:
The patent implements continuous application and curing of insulation material as the conductor passes through the treatment device. This continuous process eliminates idle time between steps and maintains constant productive action, significantly improving throughput compared to batch processing methods
2Manufacturing precision
If mica tape is precisely positioned, then insulation quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces the mechanical tape positioning and wrapping system with a fluid-based application unit that deposits insulation composition. This substitution eliminates complex mechanical positioning mechanisms while achieving uniform insulation coverage through controlled material application and curing
Solution Approach 2:
The patent changes the state of insulation material from solid tape to liquid/applied composition that can be uniformly distributed. This parameter change allows the material to flow and conform to the conductor surface, achieving precise coverage without complex positioning systems, then cures to form the final insulation layer
3Reliability
If liquid resin is used for impregnation, then insulation is achieved, but health and environmental hazards increase
Solution Approach 1:
The patent utilizes phase transition by applying insulation material in liquid form and then curing it to a solid state. This allows the material to be applied easily in fluid form for complete coverage, then transforms to solid to eliminate volatile chemical fumes, resolving the hazard issue while maintaining insulation effectiveness
Solution Approach 2:
The patent employs a single-pass application method where the insulation composition is applied and cured in one continuous operation without requiring prolonged exposure to liquid resin. This minimizes the time liquid resin is present in the workspace, reducing fume exposure risks while achieving the same insulation result
4Manufacturing precision
If extensive heating is applied for curing, then insulation quality is improved, but energy consumption increases
Solution Approach 1:
The patent applies the insulation composition in a pre-formulated state that is optimized for curing efficiency. The composition is prepared beforehand with appropriate viscosity and chemical properties that enable rapid curing with minimal energy input, reducing the heating requirement while ensuring high-quality insulation layer formation
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 approach results in a uniformly insulated conductor with reduced voids and improved adhesion, enhancing safety and efficiency by eliminating the need for extensive heating and minimizing environmental impact.
Implementation Method 1
forming a pool of the composition having a substantially constant pressure that provides a homogeneous liquid composition around the conductor
Implementation Method 2
the curing unit is configured to activate a curing process of the thermosetting material to obtain the insulation layer on the conductor
Data Source
Figure 1~2
Figure 3
Figure 3A
AI summary
An apparatus and a method for applying insulation material onto a conductor are disclosed. An apparatus (100, 200) for applying an insulation layer (20) onto a conductor (15-1, 15-2, 15-3, 15-4) to obtain a conductor arrangement (10) for an electrical appliance is provided, the apparatus comprising: a treatment device (110, 120, 130; 210, 220, 230) having at least an application unit (110, 210) and a curing unit (120, 220), the curing unit (120, 220) being arranged downstream of the application unit (110, 210); an advancement device (150) configured to perform a relative movement of the conductor (15-1, 15-2, 15-3, 15-4) with respect to the treatment device (110, 120, 130; 210, 220, 230) in an advancement direction (A), wherein the application unit (110, 210) is configured to apply a composition of a thermosetting material and solid electrically insulating elements, preferably mica platelets, onto the conductor (15-1, 15-2, 15-3, 15-4) by forming a pool (300) of the composition having a substantially constant pressure that provides a homogeneous liquid composition (330) around the conductor, and wherein the curing unit (120, 220) is configured to activate a curing process of the thermosetting material to obtain the insulation layer (20) on the conductor (15-1, 15-2, 15-3, 15-4).