Higher Radial Suspension Force of Magnetic Bearing on Centrifugal Compressor for HVAC

Yusuke Irino
Technology and Innovation Center, DAIKIN INDUSTRIES, LTD.

Abstract

The implementation of a magnetic bearing within a high-speed, high-capacity SPM motor (450kW, 17,000rpm) and the subsequent elimination of the step up gear from the centrifugal compressor have achieved increased efficiency, size reduction, and oil-free design of large HVAC chillers.
This report describes Jmag analysis case examples of magnetic bearing with higher radial suspension force which is key technology to achieve higher speeds and compressor size reduction.

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