Motor Winding Insulation Using Staged Resin Heating and Curing
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Solution Overview
Problem
Existing insulation methods for renewable energy electric vehicle motors suffer from low resin utilization rate, insufficient coating, long curing times, and inefficient production, failing to meet the demands of high power density and environmental sustainability.
Innovation Solution
A method involving a specific resin composition and heating process, including preheating, potting, trickling, and curing at controlled temperatures, to achieve a higher resin filling level, enhanced resin utilization, and faster curing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ordinary impregnating method, vacuum impregnating method, vacuum pressure impregnating method, or continuous impregnating method is used, then the motor windings are insulated, but the curing time is long and production efficiency is low
Solution Approach 1:
The patent changes the temperature parameter during the impregnating process, using heated impregnating resin (typically 80-150°C) to accelerate resin flow and penetration into windings, thereby reducing curing time while maintaining insulation quality. This temperature parameter change enables faster impregnation without compromising the reliability of the insulation structure.
2Reliability
If ordinary impregnating method is used, then the motor windings are insulated, but resin loss is large and resin utilization rate is low
Solution Approach 1:
The patent replaces traditional mechanical impregnation methods (pouring, dipping) with a vacuum-based system that uses pressure differential to drive resin into windings. The vacuum impregnating apparatus creates negative pressure to draw resin through the windings efficiently, then uses controlled pressure to saturate the structure, minimizing resin loss while achieving complete insulation coverage.
3Loss of substance
If dipping method or trickling method is used to reduce resin loss, then resin utilization rate improves, but insulation filling level is insufficient for high power density motor
Solution Approach 1:
The patent merges multiple impregnation techniques into a unified vacuum impregnating process that combines the advantages of dipping (complete coverage) and trickling (controlled resin flow). The process uses vacuum to draw resin through windings from multiple directions simultaneously, ensuring complete saturation and high filling level while maintaining low resin loss through precise pressure control.
4Productivity
If heating temperature is increased to accelerate curing, then curing speed improves, but resin waste increases
Solution Approach 1:
The patent implements a continuous impregnating and curing process where the motor windings remain in the impregnating apparatus throughout the entire process. The resin is continuously pumped through the windings under vacuum pressure while heating occurs simultaneously, eliminating the need for separate impregnation and curing steps. This continuity ensures complete resin saturation before curing begins, preventing resin waste while maintaining high curing speed through sustained thermal processing.
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 method achieves a resin utilization rate of 100%, three times faster curing speed, and a resin filling level up to five times greater than conventional methods, with improved adhesive strength, thermal conductivity, and reduced resin waste.
Implementation Method 1
the capillary force of the resin can make the resin absorb into the wire harness quickly and uniformly
Implementation Method 2
heating up the motor winding with electricity to 165-175° C.
Data Source
AI summary
The present invention relates to a method of insulating a motor, comprising: providing a impregnating resin; heating up the motor windings with electricity to 100-120° C., and potting the motor windings with the impregnating resin for 2-5 min at that temperature; heating up the motor windings with electricity to 140-160° C., and trickling the impregnating resin for 3-8 min for insulation; heating up the motor windings with electricity to 165-175° C., and curing for 15-45 min. The method of insulating a motor provided by the present invention has a higher resin filling level and a higher resin utilization rate, as well as faster curing speed.