US 10,851,834 B2 · Compensation windings for magnetic bearings

Abstract

Axial magnetic bearings that include a primary winding(s) and one or more compensation windings that provide compensation such that operation of the first and/or second primary windings and the compensation windings results in a net magneto-motive force of around zero ampere turns. Current can selectively flow through one or both of the primary windings of an opposing pair of axial magnetic bearings, while current flows through the compensation windings in manner that compensates for the magneto-motive force generated by the primary winding(s). In at least situations in which the number of turns for at least one pair of compensation windings is generally equal to the number of turns of each primary winding, the net magneto-motive force generated by current flowing through a primary winding of one axial magnetic bearing and through the compensation windings of both axial magnetic bearings can generally be zero.

Claims9

Dependent claims

An apparatus comprising:

an axial bearing core, at least a portion of the axial bearing core comprising a ferromagnetic material;
a primary winding coupled to the axial bearing core, the primary winding having a plurality of first windings each arranged to have a first number of turns, the plurality of first windings further arranged for a flow of a current through the primary winding in a first direction;
and
a plurality of compensation windings coupled to the axial bearing core including a plurality of second windings arranged to have a sum total of a second number of turns, the second number of turns being one-half the number of turns of the first number of turns, the plurality of second windings further arranged for a flow of a current through the plurality of second windings in a second direction, the second direction being opposite of the first direction.

1 more element

Dependencies are inferred from the claim text.

Compensation windings for magnetic bearings

Life of this patent

Compensation windings for magnetic bearings

Life of this patent

Abstract

Claims9