Patent ID: 11859667
Assignee: INGERSOLL-RAND INDUSTRIAL U.S., INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G  H | IPC F  G  H

Claim 7:
8. A position sensor for positioning a shaft of an electrical motor, the position sensor comprising:
a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft, each E-shaped ferromagnetic core having at least a middle tooth, a first side tooth, and a second side tooth, the second side tooth of each E-shaped ferromagnetic core at least partially overlapping the first side tooth of an adjacent E-shaped ferromagnetic core of the arranged plurality of E-shaped ferromagnetic cores and thereby defining a set of overlapping side teeth, wherein a first set of the plurality of E-shaped ferromagnetic cores are arranged in a first plane and a second set of the plurality of E-shaped ferromagnetic cores are arranged in a second plane, the first and second planes being parallel to define a z-axis offset;
a first plurality of electromagnetic coils, each electromagnetic coil positioned around a respective set of overlapping side teeth, wherein a first set of opposing electromagnetic coils of the first plurality of electromagnetic coils define an x-axis offset and a second set of opposing electromagnetic coils of the first plurality of electromagnetic coils define a y-axis offset;
a second plurality of electromagnetic coils, each electromagnetic coil positioned around a respective middle tooth; and
a control circuit coupled to the electromagnetic coils of the first and second pluralities of electromagnetic coils, the control circuit configured to receive position signals corresponding to a relative position of the x-, y-, and z-axis offsets, and control power supplied to the electromagnetic coils of the first plurality to cause rotation of the shaft based on the received position signals.