Bearing current reduction assembly

Details Bearing current reduction assembly Bearing current reduction assembly

2006-01-10

2006-01-10

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S06700R, C310S06800R, C310S071000

Reexamination Certificate

active

06984906

ABSTRACT:
An electric motor with an adjustable speed drive includes a bearing current reduction assembly including a charge concentrator providing a higher electric field concentration through a clearance between an inner bearing cap and a rotor shaft than occurs within a bearing. Accordingly, damaging rotor to ground currents through a bearing are reduced or eliminated. The charge concentrator is disposed on either the rotor shaft or the inner bearing cap, or both.

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