Polyimide and PEEK Composite Magnet Wire Insulation
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Solution Overview
Problem
Current magnet wire insulation for electric submersible pump applications is not sufficiently waterproof, durable during transportation, and reliable at high temperatures, leading to premature motor failure and costly repairs.
Innovation Solution
A system and method for enhanced magnet wire insulation using a layer of polyimide tape, such as Kapton®, encased within a layer of organic polymer thermoplastic, like PEEK, to create a durable and waterproof insulation capable of withstanding temperatures above 550°F, applied through a process involving wrapping, extrusion, and fusion to ensure seamless splicing and improved adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyimide film (e.g., Kapton®) is used for magnet wire insulation, then dielectric strength is improved, but waterproofness deteriorates because the material is hydroscopic and degrades rapidly when wet
Solution Approach 1:
The patent applies composite materials by combining polyimide film with waterproof materials (such as polytetrafluoroethylene or polyethylene) to create a multi-layer insulation structure. The polyimide layer provides high dielectric strength while the waterproof layer prevents water ingress and degradation, thus resolving the contradiction between dielectric strength and waterproofness.
2Strength
If polyimide tape is used for magnet wire insulation, then dielectric strength is improved, but durability during transportation deteriorates because the wire is prone to damage during shipping
Solution Approach 1:
The patent combines polyimide film with an additional protective insulation layer to form a composite insulation structure. The outer protective layer provides mechanical durability and resistance to damage during transportation, while the inner polyimide layer maintains high dielectric strength, thus resolving the contradiction between dielectric strength and transportation durability.
3Ease of manufacture
If organic polymer thermoplastic (e.g., PEEK) is used for magnet wire insulation, then ease of manufacture is improved, but temperature resistance deteriorates because dielectric strength drops off rapidly above 500° F
Solution Approach 1:
The patent creates a composite insulation structure where organic polymer thermoplastic provides the outer layer with ease of extrusion and manufacturing benefits, while polyimide film provides the inner layer with high temperature resistance. This combination resolves the contradiction between ease of manufacture and temperature resistance by assigning each material its optimal function.
4Ease of operation
If adhesive is used to attach polyimide tape to magnet wire, then ease of operation is improved, but reliability deteriorates because the adhesive may delaminate at extreme high temperatures
Solution Approach 1:
The patent addresses adhesive delamination by changing the operational parameters through the use of waterproof materials with appropriate thermal stability. The composite structure with waterproof outer layer protects the adhesive interface from water ingress and thermal degradation, maintaining bond stability at high temperatures while preserving ease of attachment during manufacturing.
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 enhanced insulation significantly increases the reliability and durability of magnet wire, preventing shorts and damage, extending the lifespan of ESP motors and reducing repair costs by providing a waterproof and high-temperature-resistant solution.
Implementation Method 1
pulling the copper magnet wire through a polyimide tape wrap machine to produce wrapped copper magnet wire; redrawing the wrapped copper magnet wire through an extrusion mold, applying a molten organic polymer thermoplastic to the wrapped copper magnet wire
Implementation Method 2
the enhanced insulation further comprising a layer of polyimide tape coupled to the magnet wire and the layer of polyimide tape further encased within a layer of organic polymer thermoplastic insulation... capable of withstanding temperatures above 550°F
Data Source
AI summary
A system and method for enhanced magnet wire insulation is described. The system of the invention provides an enhanced insulation for magnet wire that is capable of withstanding high temperatures and provides a seal against water that is needed in electric submersible pump (ESP) applications. The enhanced insulation of the system of the invention provides the dielectric advantages of polyimide tape, such as Kapton tape, while also including the advantages of organic polymer thermoplastic insulation that prevents the delaminating at high temperatures that may occur in pumping applications using a variety of electrical submersible motors.