University of Illinois Air Cooled PM Machine

Overview

Topology

• 1.0 MW permanent magnet synchronous motor with a performance goal of 13 kW/kg and efficiency of >96 percent
• Outside rotor with a composite overwrap and permanent magnets.
• Relatively high pole count and fundamental frequency.
• Extensive analysis and subcomponent testing have been done to optimize the electromagnetic, structural, and thermal design.

Aircraft Level Integration

• The motor integrated with the Rolls-Royce LibertyWorks EVE engine concept is shown.
• The motor design is being coordinated with a design and build effort at the University of Illinois to produce a multilevel inverter, which potentially could be used to drive the motor.

Validation

• Form wound litz wire fabrication and thermal testing
• Full-speed rotor validation testing was done to ensure the best possible permanent magnet/carbon fiber overwrap rotor design

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