Magnetic bearing stator with improved bobbins

A stator assembly for a magnetic bearing, the stator assembly comprising:

• a core member formed of a ferromagnetic material, having a centerline and including an outer annular portion and a plurality of projections extending radially inwardly from the outer annular portion and spaced circumferentially about the centerline, each projection having a first axial end and an opposing second axial end;
• a plurality of bobbins formed of an electrically insulative material, each bobbin being provided as a pair of bobbins including a pair of first shell halves connected by a first skirt portion, each one of the first shell halves being disposed against the first axial end of a separate one of two of the plurality of projections, and a pair of second shell halves connected by a second skirt portion, each one of the second shell halves being disposed against the second axial end of a separate one of the two projections, one of the second shell halves being coupled with the one of the two first shell halves disposed against the same one of the two projections to enclose the projection within a cavity defined between the first and second shell halves and the other one of second shell halves being coupled with the one of the two first shell halves disposed against the same one of the two projections to enclose the projection within a cavity defined between the first and second shell halves;
• and
• a plurality of windings each including at least one wire wound about a separate one of the plurality of bobbins, each winding being electrically coupleable with a source of electric power, the winding disposed about one bobbin of each pair of bobbins and the projection encircled by the winding providing a north pole of the stator and the winding disposed about the other bobbin of each pair of bobbins and the projection encircled by the winding providing a south pole of the stator.

A stator assembly for a magnetic bearing, the stator assembly comprising:

• a core member formed of a ferromagnetic material, having a centerline and including an outer annular portion and a plurality of projections extending radially inwardly from the outer annular portion and spaced circumferentially about the centerline;
• a plurality of bobbins, each bobbin being formed of an electrically insulative material and including a first segment with a first open cavity disposed against a separate one of the plurality of projections such that a portion of the one projection is disposed within the first open cavity and a second segment with a second open cavity disposed against the one projection such that a remaining portion of the one projection is disposed within the second open cavity, the second segment being coupled with the first segment such that the one projection is enclosed within the bobbin first and second segments;
• and
• a plurality of windings each including at least one wire wound about a separate one of the plurality of bobbins, each winding being electrically coupleable with a source of electric power such that each winding and the projection encircled by the winding provide a pole of the stator.