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84 DESIGN007 MAGAZINE I OCTOBER 2021 In this month's column, I will be exploring how resin chemistries can be incorporated by design engineers facing ever increasing new challenges from e-mobility applications— for instance, motors and generators offering higher levels of power output, noise reduction, and reliability. One of the biggest areas of con- cern for designers is the issue of heat impact on battery performance, particularly as drivers crossing over from traditional fuel vehicles to electric will expect no compromise in perfor- mance from their new electric/hybrid vehicle. Let's take a closer look at how resin systems can be implemented to improve performance, safety, reliability, and ultimately, lifetime. Key Benefits of Using Resins in EV Applications Protecting the electronics is vital to ensuring long-term performance and reliability. Encap- sulation resins benefit e-vehicles in numerous ways, including improving thermal conduc- tivity to dissipate heat away from hot spots, improved thermal endurance and stability in chemicals, and fast gap filling to provide resis- tance towards crack propagation. Encapsula- tion resins can also prevent costly maintenance and repair. Why Encapsulate Electric Motors? Historically, varnishing of the rotor and sta- tor windings was common to achieve a mini- mum level of insulation; such varnishes were solvent-based and contained a high percentage of volatile organic compounds (VOCs). How- ever, with increasing environmental aware- ness, legislation restricts the use of VOCs due to their emissions into the environment. Such varnishes do not fulfil the higher requirements of e-motors in the automotive industry where Are Encapsulation Resins Suitable for EV Applications? Sensible Design by Beth Turner, ELECTROLUBE

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