Empire Magnetics

Motors for Harsh Environments

The Empire Magnetics product line features 1.8o hybrid permanent magnet stepping motors and selected brushless servo motors for positioning applications that demand:

• Sealed motors for wet, dusty or hazardous environments
• Specialty motors for vacuum, radiation and extreme temperature operation
• High-power stepper and servo gearmotors
• Custom motors and system integration services

Our motor products are constructed from the highest quality materials, and are built to order. More than thirty years of motion control experience, including the latest motion control technologies insure that engineering solutions provided by Empire Magnetics are the best available for your application.

Empire Magnetics Products

• Stepper Motors
• Servo Motors
• Gearboxes
• Resolvers
• Stand Alone Resolvers
• Brakes
• Rotor Nuts
• Turnkey Projects
• Repair Services

Vacuum Rated Motors

Ordinary motors cannot operate for long at pressures lower than 10-4 Torr. Empire Magnetics vacuum rated motors are constructed to allow extended operation at pressures as low as 10-7 Torr without a sacrifice in motor performance.

Some vacuum applications cannot tolerate contamination by motor outgassing products. To accommodate a range of motor cleanness requirements, Empire Magnetics provides three grades of vacuum rated stepping motors in the full range of environmental motor sizes.

Radiation Hardened Motors

High energy gamma radiation will attack all of the materials in a device, however the non-metallic materials in a motor or resolver are subject to more rapid breakdown. Lubricants, varnish, adhesives, insulations, and cables deteriorate and ultimately crumble. Empire Magnetics radiation hardened stepper motors, motors and resolvers (RH-) combine the best available radiation resistant materials with practical commercial practices to provide products with the longest possible service life within pragmatic budgetary considerations.

Waterproof Motors

Empire Magnetics has designed a series of products specifically intended to meet the requirements of certain applications. Stainless steel housed waterproof stepper motors and A.C. induction motors provide corrosion resistance, and easy to clean features. The stainless steel packages are useful in nuclear reactor applications, while the Waterproof A.C. motors are frequently found in the food processing industry.

Hazardous Area Motors

Two commonly used methods are Explosion Proof (EP) and Purged and Pressurized (PT). Explosion Proof devices are intended to withstand and contain an expected explosion, Purged and Pressurized systems are intended to prevent an explosion from occurring. While Explosion Proof is more widely known the Purged and Pressurized technique is more flexible and universally recognized.

Cryogenic Stepper Motors

Cryogenic temperatures (to 20 degrees Kelvin) call for motors designed with materials carefully selected for compatible thermal expansion characteristics and resistance to brittleness. CY Series cryogenic stepper motors feature special cryogenic dry lubrication and proprietary metal and or metal alloy components. We can also manufacture custom motors wound with superconducting wire or perform other user specified alterations as required at additional cost.

High Temperature Motors

High temperature motors, (HT- prefix) are provided with class H insulation systems. This insulation begins to melt at 180 degrees Centigrade. The heat generated by the motor must be subtracted away from the melting point of the insulation to obtain the maximum allowable ambient temperature. The HT series products without modifications are useful from 0 to about +155 (see heat loss details). For temperatures from 0 to -20 C most of the HT products can be used, but different lubrications are required.

Dustproof Motors

Many industrial operations involve the use, production or processing of materials in powder form. Motors used in the automation of such proceses are prone to failures when particulates migrate into unprotected bearings and motor cavities. Empire Magnetics dustproof motors survive in environments where other motors fail.

Empire Magnetics dustproof motors are available in industry standard size 23, 34, 42, and 65 frame sizes. Note where seal housing affect usable shaft length.

Industrial Grade Products

Frequently, customers of specialty products desire "non-environmental" products as a way to keep the high quality Empire Magnetics Inc. represents. New customers may wish to test standard products to insure they have selected the correct items for their application. Empire Magnetics offers the Industrial grade (IN- versions) which provide the same performance characteristics as the environmentally conditioned products, but we use commercially accepted materials and mechanical configurations to keep the cost low.