Motor eccentricity measuring apparatus
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United States of America Patent
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-
Nov 15, 1994
Grant Date -
N/A
app pub date -
Mar 25, 1992
filing date -
Mar 29, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor eccentricity measuring apparatus is provided comprising a detecting device for detecting a deflection of the rotating shaft of a motor, a first, a second, and a third hold device for holding detected values supplied from the detecting device, and an amplifier device for amplifying a difference between two outputs of the first and the second hold device. In operation, RRO is calculated, during a first measuring period, from the detected values of the first and third hold device and NRRO is calculated, during a second measuring period, from the detected values of the first and second hold device and simultaneously, amplified with the amplifier device.
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