Operating circuit including an oscillating circuit capacitor coupled to an auxiliary winding for an apparatus that measures the unbalance of a rotary member
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United States of America Patent
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-
Nov 21, 1995
Grant Date -
N/A
app pub date -
Jul 21, 1992
filing date -
Jul 22, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An operating circuit for use in an apparatus for measuring unbalance of a rotary member in which the drive for the rotary member is by means of a single-phase ac motor with a single-phase main winding and an auxiliary winding which is electrically displaced through 90.degree.. Under at least approximately load-free operating conditions, a capacitor is connected in parallel with the auxiliary winding to reduce fluctuating angular speeds of the rotor of the motor when the motor is operating in an approximately load-free condition.
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