Patent ID: 8487493
Filing Date: 2013-07-16
Classification: E21B,F04D,F05D,F16C,H02K,Y10T

Abstract:
1. A rotating apparatus, comprising: a housing; a shaft at least partially disposed within a first pressure environment defined by the housing; a first magnetic bearing supporting the shaft and being at least partially disposed within the first pressure environment; a sensor operable to sense a position of the shaft relative to the first magnetic bearing; a controller disposed in a second pressure environment independent of the first pressure environment and operable to communicate with the sensor and to generate a control signal for the first magnetic bearing based on the sensed position; and a communication device operable to communicate the control signal between the controller and the first magnetic bearing and to communicate the sensed position between the sensor and the controller without penetrating a pressure boundary defined between the first and second pressure environments, wherein the communication device is operable to provide a modulated power supply as the control signal for the first magnetic bearing for affecting a strength of a magnetic force generated by the first magnetic bearing, and the controller is operable to control the modulated power supply based on the sensed position.