Structure study and performance analysis on the new laminated core type axial redundant magnetic bearing

Abstract

The continuous development of magnetic bearing in areas of aerospace, military, turbine power generation and flywheel energy storage has raised higher requirement for the reliability of magnetic bearing system. However, the integrated armco iron structure adopted by traditional concentric axial redundant magnetic bearing stator causes more eddy current loss and temperature rise when working and is not reliable. For the purpose of reducing eddy current loss and improving the reliability of magnetic bearing, this paper proposes a laminated core type axial redundant magnetic bearing. The comparison of dual-ring axial redundant magnetic bearing and laminated core type axial redundant magnetic bearing regarding their carrying capacity and temperature rise performance showed that the latter was better in an obvious way.