Emerson Electric Company

William J Schnyder

Philip Stephen Johnson

L Ranney Dohogne

Douglas C Debrecht

A motor assembly includes a stator assembly and a rotor assembly having an associated rotor shaft. The rotor shaft is mounted between and supported by endshields both are mounted to the stator assembly. At least the mounting one of the endshields includes a plurality of truss members so configured as to permit the endshield to be made of different materials while retaining substantially the same configuration. The truss members include rails oriented generally parallel to the axis of rotation of the rotor shaft. A web extends between the rails. Knee beam truss members are braced in various configurations. In some embodiments, a venturi cowling is provided to cause air to flow over end turns of the motor.

Motor assemblies with improved endshields

An electric motor which has an extended service life in high moisture environments. The motor includes non-moisture absorbing (i.e., non-hygroscopic) electrical insulation applied to the magnet wires comprising the stator coils of the motor, non-moisture absorbing ground insulation, a double-cured protective insulation coating applied to the stator coils and to the electrical connections thereof, and a connector insulation cap which effectively seals moisture out of the stator coil electrical connections. A method of manufacturing such moisture resistant motors is also disclosed.

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Kirkwood, MO, United States of America

William J Schnyder