Filter circuit and control circuit for controlling a rotor

Details Filter circuit and control circuit for controlling a rotor Filter circuit and control circuit for controlling a rotor

1996-08-15

1998-04-07

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 709

Patent

active

057368015

ABSTRACT:
An input signal related to x- and y-axes is expressed by a complex variable (U), a transfer function of a low-pass or high-pass filter having a real-number coefficient is represented by F(s), a central angular frequency, which may be either positive or negative, to be passed or rejected, is represented by .omega., an imaginary number unit is represented by j, and a complex coefficient transfer function produced by replacing "s" in the transfer function F(s) with (s-j.omega.) is represented by F(s-j.omega.). An output signal related to the x- and y-axes which is generated when the input signal U passes through the complex coefficient transfer function F(s-j.omega.) is expressed using a complex variable (V), producing a transfer expression formula:

REFERENCES:
patent: 4992714 (1991-02-01), Matsushita et al.
patent: 5365787 (1994-11-01), Hernandez et al.
patent: 5486729 (1996-01-01), Matsushita et al.
patent: 5576587 (1996-11-01), Takahashi et al.
Murakami, Chikara; "Complex gain compensation method for controlling magnetically levitated rotation body" published by The Institute of Electrical Engineers of Japan, Dec. 9, 1994, pp. 53-62.
Murakami, Chikara; "On Mixed Use of j in Complex Variable System of Rotor and in Phase Domain", Dynamics and Designs Conference, vol. B, published by Japan Society of Mechanical Engineers, Aug. 7, 1995, pp. 489-492.
Johnson, Bruce Graham, "Active Control of a Flexible, Two-Mass Rotor: The Use of Complex Rotation", Massachusetts Institute of Technology, Sep. 1986, pp. 221.
"Flexible Rotor Vibration Analysis Combined with Active Magnetic Bearing Control"; International Conference on rotordynamics, published by International Federation for the Theory of Machines and Mechanisms, and Japan Society of Mechanical Engineers, Sep. 14-17, 1986, 186, pp. 421, p. 425.
"Magnetic levitation and Magnetic Bearing" published by Corona Publishing Company, Japan, Jun. 1993, pp. 202-209.

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