Empire Magnetics Inc.: Waterproof Stepper Motors - Frame Size 34

Submersible Waterproof Stepper Motors, AC Motors , Resolvers

The use of electrical motors in and around water presents a complex set of challenges to the equipment user, systems designer and to the equipment supplier. Standard or commercial motors are typically designed for low cost, high volume manufacturing as a result they are typically not suitable for use in wet areas.

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.

For submersion and deep sea applications the addition of pressure compensation devices allow the equipment to be used in applications that are particularly inhospitable.

The stainless waterproof packages provide flexibility to add gearboxes, feedback resolvers and other features to the mechanical assemblies, the ability to accommodate designers needs makes them the first choice for new product developments.

Custom products available:

Empire Magnetics Inc. can provide the following items on a custom basis, stainless steel brushless DC motors with resolver feedback, assemblies of motors and gearboxes, assemblies of motors and resolvers, assemblies of brushless motors and propellers as thruster motors, assemblies in hermetically sealed vessels.

Waterproof AC Induction Motors

The WD series of stainless steel house AC waterproof induction motors have been designed for use in applications where they will be subjected to frequent wetting or washdown. Since these waterproof motors are equipped with cooling fans, modifications are required for applications when the waterproof motors will be submerged.

Submersible versions of the waterproof motors are oil filled and pressure compensated, they are provided without cooling fans. In a fully submerged situation the water can be relied upon for motor cooling.

The most difficult application is when the motor will normally be used in air, but occasionally will be submerged. If the cooling fan is installed for use in air, then it will act as a pump when in water. This pumping action will overload the motor unless it is significantly oversized for the application. On the other hand, if the motor is provided without a fan, then it must be significantly oversized to allow for the heating when it is not being cooled by water.

Features:

Typical Applications:

Waterproof Stepper Motors - Frame Size 34

Automation of industrial processes often requires automation equipment to operate in the presence of water and aqueous fluids. Step motors are prone to short term failure in these conditions because they have several water entry point that make sealing virtually impossible.

Operating temperatures produce corrosive steam inside a motor, drastically shortening motor life.

Empire Magnetics' waterproof step motors are specifically designed to address the corrosion and sealing rotating shafts and other fluid entry points.

Features include integrated design/solution to provide reliability in a water environment. The stainless steel exterior, bearings and shaft are highly corrosion resistant. the motor body is sealed with O-ring using integral housing seals. Double sealed cable entry excludes any entry of water. A specific mounting face gasket was designed to seal the motor to the mounting surface. The motor is filled with oil and a pressure equalizing diaphragm option is available for submersion applications. Other points of water leakage are dealt with by integral shaft seals and heavy winding insulation prevents short circuits.

A Combination of Environmental Options

For the most unique and demanding waterproof applications, Empire Magnetics' WP motors can be combined with the following environmental options: radiation hardened, hazardous, dustproof and abrasive dustproof. Special chemical resistant versions are available. 316 stainless is available for saltwater submersion.

Waterproof Stepper Motors - Frames

The frame sizes: 23, 34, and 42 are offered in the stainless steel configuration.

Frame size selection:

Stainless steel waterproof stepper motors are available in three frame sizes with minor dimensional increases. Size 34 and 42 have motors have industry standard shaft, pilot, and bolt circle dimensions with a round mounting flange. Square flange versions are available. An optional industry standard size 23 compatible square flange adapter is available.

Waterproof stepper motors are supplied with threaded plugs installed in place of the air fittings. One or both supplies fittings may be installed to facilitate pressurization when oil filling is not employed. For submersion, internal air pressure must exceed water pressure to be effective. Shaft seals are rated to 15 psi.

Model#: WP-U31, WP-U32, WP-U33