Bearing wear detector for AC rotary electric instrument
First Claim
1. A bearing wear detector for an AC rotary instrument having a rotor and a stator, in which stator are defined a plurality of magnetic pole positions, comprising a plurality of detecting coils mounted on said stator approximately uniformly spaced from each other and concentric to the central axis of the stator, the number of said pole positions being other than a multiple of the detecting coils, said detecting coils being connected in series with each and to means for measuring variation in voltage passing therethrough.
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Abstract
A bearing wear detector for an AC rotary electric instrument such as an electric motor or a generator in which more than three detecting coils are mounted around a core of the electric instrument having poles of three or not three multiples at a relative space angle and the detecting coils are connected in series to obtain a resultant voltage.
28 Citations
7 Claims
- 1. A bearing wear detector for an AC rotary instrument having a rotor and a stator, in which stator are defined a plurality of magnetic pole positions, comprising a plurality of detecting coils mounted on said stator approximately uniformly spaced from each other and concentric to the central axis of the stator, the number of said pole positions being other than a multiple of the detecting coils, said detecting coils being connected in series with each and to means for measuring variation in voltage passing therethrough.
Specification