Imbalance correcting apparatus for a rotor

Details Imbalance correcting apparatus for a rotor Imbalance correcting apparatus for a rotor

1991-03-12

1992-07-14

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

318640, 32420712, H02K 709, G05B 1302, F16C 3906

Patent

active

051305895

ABSTRACT:
An apparatus for correcting imbalance of a rotor suspended by a magnetic bearing system including a displacement sensor for detecting a displacement of the rotor. An imbalance correcting circuit applies a trial imbalance correcting signal to the magnetic bearing system. A command computer applies an amount of correction to the imbalance correcting circuit and calculates an influence factor of the imbalance correcting signal on the basis of outputs from the displacement sensor before and after the imbalance correcting signal is applied to the magnetic bearing system, so as to cause the imbalance correcting circuit to apply a predetermined imbalance correcting signal produced from the influence factor to the magnetic bearing system, thereby minimizing the output of the displacement sensor to correct mass-imbalance of the rotor.

REFERENCES:
patent: 4733149 (1988-03-01), Culberson
patent: 4841184 (1989-06-01), Chen et al.
patent: 4841212 (1989-06-01), Matsushita
patent: 4910449 (1990-03-01), Hiyama et al.
patent: 4950966 (1990-08-01), Moulds, III
patent: 5013987 (1991-05-01), Wakui
"A Design of Robust Servo Controllers for an Unbalance Vibration in Magnetic Bearing Systems"-Magnetic Bearing, 1988, pp. 319-326.
"Balancing Measurement Systems Using Magnetic Bearings"--Magnetic Bearing, 1988, pp. 327-334.

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