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Magnetic Advantage

Polyimide coated magnet wires and their specifics


Electrical breakdown of high-temperature insulation materials can be prevented by

using thermoplastic Polyimide, TPI. This polymer can be extrusion-coated as other

polymers, but 'AURUM', TPI reduces electrical and magnetic losses. 'AURUM' has the

highest Tg of any commercially available Thermoplastic, 245°C and its insulation

performance especially at temperatures above 150°C beats any other know insulation.





As the automobile sector transitions to electric vehicles, new polymers that offer higher

electrical and thermal properties are used. For better system integration, weight-

reduction and downsizing in higher-volt systems, for faster charging and longer charging

distances, electrical breakdown must be prevented by high-temperature insulation

materials. AURUM reduces electrical and magnetic losses with a high comparative

tracking index (CTI) > 600 volts.


Thermoplastic Polyimide (TPI) produced by Mitsui Chemicals of Japan, and sold by

BEIGLO GmbH is known for excellent thermal stability, high-temperature resistance,

and robust electrical insulation properties. TPI coated magnet wires are a suitable

choice for high-voltage applications (800V and above). Here are some key characteristics of 'AURUM' coated magnet wires for high-voltage mobility applications:


-High-Temperature Resistance: Capable of withstanding elevated temperatures in

general and best-in class performance near welding-spots.


-Thermal Stability: Provide thermal stability over a wide temperature range,

ensuring the integrity of the insulation even well above 150°C continuously.


-Electrical Insulation: Excellent electrical insulation properties to prevent electrical

breakdown and ensure the safety and reliability of the system.


-Flexibility: Maintain flexibility even at high temperatures, allowing for ease of

winding during the manufacturing process and flexibility in the final application.


-Chemical Resistance: Resistant to many chemicals, enhancing the durability of

the coating in various cooling environments.


-High Dielectric Strength: The high dielectric strength of 'AURUM' helps in

preventing electrical arcing and breakdown.


-Lightweight: 'AURUM' coated magnet wires are lightweight, because even 30%

less volume insulates better than other, commonly used materials.

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