Patent ID: 9746028
Date: 2017-08-29
CPC Classifications: F16C,H01F,H02K

Claim:
1. A rotary machine system, comprising: an active magnetic bearing assembly configured to facilitate rotation of a drive shaft, wherein the active magnetic bearing assembly comprises: a stator comprising a first tooth, a second tooth, a third tooth, and a fourth tooth configured to be radially spaced from the drive shaft; a first electromagnet comprising a first electromagnet wire wrapped around the first tooth and the second tooth, wherein the first electromagnet is configured to generate a first magnetic field that exerts an attractive force on the drive shaft toward the first electromagnet; a first integrated position sensor comprising a first sensor wire wrapped around the first tooth and the third tooth, wherein the first sensor wire is configured to carry a first current; and a second integrated position sensor comprising a second sensor wire wrapped around the second tooth and the fourth tooth, wherein the second sensor wire is configured to carry a second current; and a controller configured to determine current position of the drive shaft based at least in part on change of inductance of the first sensor wire and the second sensor wire, and to instruct the first electromagnet to adjust magnitude of the first magnetic field based at least in part on the current position.