Bias current control circuit

Details Bias current control circuit Bias current control circuit

1996-09-16

1997-12-30

Laballe, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 709

Patent

active

057034249

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.

REFERENCES:
patent: 4090745 (1978-05-01), Dohogne et al.
patent: 4392693 (1983-07-01), Habermann et al.
patent: 5202824 (1993-04-01), Chen
patent: 5306975 (1994-04-01), Bichler
patent: 5467244 (1995-11-01), Jayawant et al.
patent: 5562528 (1996-10-01), Ueyama et al.
patent: 5576587 (1996-11-01), Takahashi et al.

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