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Cryogenic Motors
Frequently Asked Questions (FAQ)
Click the questions below to receive information on any of these questions.
Empire Magnetics has designed and built cryogenic motors for operation at 4° K. There is no reason to think they will not operate at 0° K, they just have not been tested at this temperature.
A cryogenic motor should be considered anytime the operating temperature is less than -40° C (the limit for Empire Magnetics’ extended temperature motors).
Empire Magnetics cryogenic motors can be expected to operate normally at room temperature. However moisture contamination of the lubrication needs to be avoided.
Yes, the torque output should be de-rated by 30% for a cryogenic application. The reasons are as follows: 1) it is necessary to use a different magnet type to withstand the temperature range, and 2) it is necessary to open the air gap to avoid mechanical problems as a result of thermal distortion.
The maximum rate of temperature change for the cryogenic motors is 10° C per minute. Faster temperature changes can result in damage to the adhesive bonds.
Yes, Empire Magnetics can provide a Teflon cable for cryogenic applications but please note that this cable is subject to cracking if flexed when cold.
Yes, the cryogenic motors are built and processed according to the laboratory grade (VX) specifications.
We have not yet discovered a suitable technology to provide flexible cables in these conditions.
Frequently Asked Questions (FAQ)
About Cryogenic Installations
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Learn About Vacuum Rated Motor Selection & Installation
Operating a motor in a vacuum is often perceived as a design challenge. Among engineers, the problems -- outgassing, contamination and temperature -- are well known. What is less well known is that there are now well-developed solutions to each of these problems.
Why Choose Empire Magnetics
Government Projects & Defense Applications
Empire Magnetics has been awarded and completed US Navy contracts in excess of $100,000 as a prime contractor. The Cage code number assigned was OYMU1, CEC code 19665900H. As a subcontractor to RSI/Comsat, SAIC, Lockheed Martin, Westinghouse, General Electric and other prime contractors for the US Government, contracts in excess of $200,000 have been awarded and completed.
Nationwide & International Distributors for Specialty Motors & Complete Motor System Solutions
Empire Magnetics products are distributed by a nationwide and international network of motion control sales professionals. Your local distributor carries the drives and controls, and the accessories needed to build a complete motion control system.