Case Study: Space saving motors power new Segway
Pacific Scientific developed the innovative new Segway™ Human Transporter design using Rynite®PET for ground insulators and encapsulation.
Application Description
Brushless electric servo motors play a key role in the successful development of the Segway™ Human Transporter, a unique new personal transportation machine for short-distance travel.
Building on encapsulation technology developed with DuPont technical assistance in the mid-1990s, Pacific Scientific developed an innovative new stator design using DuPontä Rynite® PET for ground insulators and encapsulation. From a pre-assembled insert, the company molds a finished stator body with integral front and rear end structures in a single step
Materials Selected and Why
Rynite® 530 meets the need for consistent performance in molding ground insulators and the encapsulated stator, and it retains electrical and mechanical properties in Class F (311°F / 155°C) service conditions under UL 1446 and IEC 62114 standards.
Benefits Gained
Space Savings – Production of front and rear end structures of the motor within the diameter of the laminated stack during encapsulation avoids the need for a separate metal housing. This and other design enhancements results in a 40% reduction in size compared with a conventional motor design.
- Low cost – Elimination of the metal housing and a reduction in the number of production steps results in a substantial cost saving, according to Pacific Scientific.
- Improved reliability – Using fewer assembly steps statistically reduces the potential for defects.
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