초록 ▼

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 th

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.

대표청구항 ▼

A method of controlling the energization of electrical coils which control a magnetic bearing of the type having stator and rotor members disposed coaxially with each other in the same plane with an annular gap between them, said electrical coils being located in pairs on each axis in said plane, on

A method of controlling the energization of electrical coils which control a magnetic bearing of the type having stator and rotor members disposed coaxially with each other in the same plane with an annular gap between them, said electrical coils being located in pairs on each axis in said plane, one coil in each pair being located on the magnetic bearing at one end of said axis and the other coil at the other end of said axis, and wherein the relative positions between the stator and rotor members along the axis are detected and a position error signal representing the position deviation relative to a reference position is detected, the method comprising the improvement of generating a first control signal in response to the position error signal being positive and a second mutually exclusive control signal in response to the position error signal being negative; and applying said first control signal to a first electronic switching circuit coupled to the electrical coil located at one end of said axis and applying said second control signal to a second electronic switching circuit coupled to the electrical coil located at the other end of said axis, whereby only that coil is energized which is located near the point where the gap is smaller, thereby to reduce the magnetic flux there and restore the centered position.