skip to main content

Title: Integration of magnetic bearings in the design of advanced gas turbine engines

Active magnetic bearings provide revolutionary advantages for gas turbine engine rotor support. These advantages include tremendously improved vibration and stability characteristics, reduced power loss, improved reliability, fault tolerance, and greatly extended bearing service life. The marriage of these advantages with innovative structural network design and advanced materials utilization will permit major increases in thrust-to-weight performance and structural efficiency for future gas turbine engines. However, obtaining the maximum payoff requires two key ingredients. The first is the use of modern magnetic bearing technologies such as innovative digital control techniques, high-density power electronics, high-density magnetic actuators, fault-tolerant system architecture, and electronic (sensorless) position estimation. This paper describes these technologies and the test hardware currently in place for verifying the performance of advanced magnetic actuators, power electronics, and digital controls. The second key ingredient is to go beyond the simple replacement of rolling element bearings with magnetic bearings by incorporating magnetic bearings as an integral part of the overall engine design. This is analogous to the proper approach to designing with composites, whereby the designer tailors the geometry and load-carrying function of the structural system or component for the composite instead of simply substituting composites in a design originally intended for metal material.more » This paper describes methodologies for the design integration of magnetic bearings in gas turbine engines.« less
Authors:
;  [1] ; ;  [2]
  1. General Electric Co., Cincinnati, OH (United States). General Electric Aircraft Engines
  2. General Electric Co., Schenectady, NY (United States). Corporate Research and Development
Publication Date:
OSTI Identifier:
169982
Report Number(s):
CONF-940626-
Journal ID: JETPEZ; ISSN 0742-4795; TRN: IM9605%%1
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Engineering for Gas Turbines and Power; Journal Volume: 117; Journal Issue: 4; Conference: 39. international gas turbine and aeroengine congress and exposition, The Hague (Netherlands), 13-16 Jun 1994; Other Information: PBD: Oct 1995
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; GAS TURBINE ENGINES; MAGNETIC BEARINGS; DESIGN; COMPUTERIZED CONTROL SYSTEMS; MECHANICAL STRUCTURES; RESPONSE FUNCTIONS