Bias current control circuit
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United States of America Patent
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-
Dec 30, 1997
Grant Date -
N/A
app pub date -
Sep 16, 1996
filing date -
Sep 16, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system for a magnetic bearing includes a sensor which generates an output representative of the relative shaft position. The signal from the sensor is processed by an integrator and offset adjustment block and a difference amplifier to subtract the processed sensor signal from a reference voltage. The difference signal result is fed to a bias control circuit including voltage dividers which generates a voltage which is received by coil current power amplifiers for both the upper and lower magnetic coils. Coil currents are then generated to stabilize the magnetic bearing.
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