Method and apparatus for controlling the energization of the ele

Details Method and apparatus for controlling the energization of the ele Method and apparatus for controlling the energization of the ele

1981-04-10

1983-11-29

Skudy, R.

Cutlery

F16C 3906

Patent

active

044177720

ABSTRACT:
This invention applies to a magnetic bearing comprising stator and rotor members positioned coaxially with each other in the same plane with an annular gap therebetween, and electrical coils located in pairs on each axis in the plane. According to the invention, the control of the energization of the coils is performed by detecting, for each axis, the relative position error between the stator and the rotor members of the magnetic bearing from a reference position and generating a first or a second control signal depending on whether the position error is positive or negative. The first control signal is applied to a first electronic circuit including the electrical coil at one end of said axis and the second control signal is applied to a second electronic circuit including the electrical coil at the other end of the axis. In this way, only that coil is energized which is located where the gap between the stator and rotor members is smaller, whereby the magnetic flux there is reduced.

REFERENCES:
patent: Re27660 (1973-06-01), Atkinson
patent: 3650581 (1972-03-01), Boden et al.
patent: 3697143 (1972-10-01), Kinchuch
patent: 3785709 (1974-01-01), Atkinson
patent: 3902374 (1975-09-01), Hoffman et al.
patent: 3955426 (1976-05-01), Klinchuch
patent: 4088379 (1978-05-01), Perper
patent: 4160202 (1979-07-01), James et al.
patent: 4285553 (1979-05-01), Robinson

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