DuPont™ Engineering Polymers Helps Make Energy Efficient Motor

Description
A high-efficiency, variable speed fan motor with patented technology RF200 lends itself to DuPont Rynite® PET and Zytel® nylon resins. The RF200 motor has a shaft power rating of up to 1 hp.

Benefits
Higher efficiency - The RF200 motor incorporating Rynite® PET has an efficiency up to 80%. Its part-speed efficiency is up to five times better than triac controlled induction motors. High efficiency means less waste heat and a low operating temperature, typically around 30°C. These features make it ideal for light industrial and domestic air moving applications, as well as heat–sensitive applications like evaporative cooling.

Reduced product cost - Reduced part count, lower part cost and simplified assembly all help to reduce the total product cost.

Lower capital cost - Fewer components, ease of moulding plastic and elimination of machining operations reduce the cost of tooling.

Design flexibility and integration - The single piece rotor doubles as the hub for an adjustable-pitch axial fan.

Lighter weight - The weight of the motor using DuPont Engineering Polymers is only one third of the weight of a conventional PSC induction motor made of metal.

Vertically integrated manufacturing - Use of an existing injection moulding facility reduces the dependence on external suppliers.

Materials Used
Rynite® was chosen over glass reinforced PBT because of its higher service temperature capabilities. It maintains its longterm properties at elevated temperatures. The UL approval process was assisted by DuPont technical support and expertise. Included in this is the use of DuPont's pre-approved Electrical Insulation Systems. Rynite® PET was also chosen for its mechanical properties such as dimensional stability, added strength and stiffness.

Zytel® was selected for the injection moulded rotor due to its over-moulding performance and dimensional stability.

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