Dreisilker Electric Motors - About Us
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Ultra-Sealed WindingTM
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Dreisilker Electric Motors can now offer a patented insulation process
called the Ultra-Sealed WindingTM. The process was developed to create total protection against moisture, prevent corrosion, improve heat transfer
from the coils to the frame and enhance winding rigidity. The Ultra-Sealed WindingTM procedure involves insulating and sealing the winding through a
mechanical and pressure process using a patented resin.
An Ultra-Sealed WindingTM should not be confused with an encapsulated winding. Encapsulation only involves coating the coil ends, but when Ultra-Sealed,
the coils are completely impregnated and sealed within high molecular weight thermoset polymer resin. There are two major advantages over traditional insulation methods.
One is total protection against moisture. During in-house tests, windings have been completely submerged in synthetic cutting fluid for as much as 2 months without
faulting to ground. The second advantage is more efficient cooling. The high molecular weight thermoset polymer resin is approximately 40 times more efficient at heat
transfer than air.
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Ultra-Sealed Winding Photo Gallery
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Click on thumbnails to see larger pictures:
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Benifits of Ultra-Sealed Winding
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Windings are totally sealed and void free
Resin penetrates any voids in laminations
Resin penetrates between slot insulation and laminations.
Adds ground wall insulation and prevents failure to ground if moisture seeps into laminations.
Prevents shorting of ground of coils where they come out of the slots. A very
common area of failures due to pressure points and grounding from contaminants.
Encapsulation of winding heads act as surge rings. This prevents movement and loosening
of coils and individual wires when motor starts or cycles.
Windings are firm in the slots. Windings and individual wires will not vibrate and loosen up.
Frequency drives can cause vibrations and harmonics in windings. This can be prevented by Ultra-Sealed Winding.
Resin is elastic to allow for expansion and contraction of the windings in the slots.
Ulta-Sealed solidifies windings and laminations, therefore helps dampen noise and vibrations
in high speed and spindle applications.
An Ultra-Sealed Winding on a motor tested under 100% load, ran 15% cooler in the slot and 25% cooler at 125% load.
Heat transfer is 40 times better than air. More mass is in contact with laminations and housings.
Leads are sealed.
Leads used are non-wicking
Winding can not easily be damaged from bumping or nicking when assembling rotors and spindle components.
Greatly reduces winding failures
Eliminated static failures due to contamination from: Water, Oil, Coolant, Metal Chips, Chemical Attack, Air-born particles such as graphite, carbon black etc., Metal dust from shot peening or wheelbrators.
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Call or email us for a quote click here.
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