Product Description
Kapton® ECRC is a thin corona resistant polyimide film with a single sided fluoropolymer coating that is heat fusible to copper and to itself, making it ideal for use in high voltage electrical insulation applications where lifetime and reliability are desired.
This film enables more flexibility in insulation constructions to achieve increased power density in compact lighter weight electrical motor designs. When used as a magnet wire insulation, Kapton® ECRC offers longer lifetime under high electrical stresses and reduces thermal resistance relative to standard magnet wire insulations.
The corona resistant films have been developed to withstand the damaging effects of higher switching frequency (dv/dt) inverters that can accelerate the aging of an insulation material or system. This partial discharge (PD) resistant film offers a superior balance of physical, electrical and thermal properties.
Applications:
Magnet wire insulation in the following:
Study of the Effects of Silicon Carbide (SiC) Inverters on Electric Motor Insulation
Swedish Energy Agency funded the research led by ABB to determine the effect Silicon Carbide technology will place on future motor design electrical insulation system.
ABB technical group designed and led the experiment, AB Dahrentrad produced top quality polyimide tape wrapped wire, and DuPont supplied Kapton® film candidates for comparison in the study. University of Chalmers performed the accelerated aging dv/dt testing at two voltage levels and two temperatures for determination of average life at failure.
Wire Insulations: DuPont™ Kapton® ECRC and Kapton® FN polyimide films
Voltage Endurance Test Conditions: 3 and 3.5 kV Voltage Amplitudes; 150 and 180 °C Temperatures
Benefits of the Thin Kapton® ECRC Film
In the above study, the thin corona resistant Kapton® ECRC film provided 8X longer life relative to standard Kapton® FN film even when the insulation build was 25% thinner.
This thin insulation material will provide an additional degree of design freedom for those looking to create smaller, powerful and more reliable motors.
View Article: Kapton® Polyimide Film Addresses the Impact of Higher Switching Frequency and Faster Voltage Rise on Motor Insulation
Typical Properties of Kapton® ECRC Film
Property |
Unit |
Typical Value |
Test Method
|
---|---|---|---|
Thickness |
mil µm |
1.25 32 |
ASTM D-374
|
Unit Weight |
g/sqm |
53 |
|
MD Tensile Strength |
kpsi MPa |
22 151 |
ASTM D-882 |
MD Modulus |
kpsi GPa |
303 2.1 |
ASTM D-882 |
MD Elongation |
% |
80 |
ASTM D-882 |
Dielectric Strength |
V/mil kV/mm |
4000 157 |
ASTM D-149 |