Reducing NdFeB magnet cost in Brushless PM-AC Synchronous machines
Presented at Motor, Drive and Automation Systems 2012
Design considerations and strategies for reducing the cost of the neo-magnets in brushless DC and PM-AC synchronous machines will be explored in detail.
There are two methods that will be studied; the first is to create rotor configurations that can take advantage of the new ceramic materials which are significantly less expensive than NdFeB.
The second method involves changes to the magnetic circuit (rotor, stator and air gap) to allow the reduction of the thickness of the NdFeB magnet.
These techniques require careful analysis of the thermal condition of the magnets beyond what is normally used for machine sizing. This necessitates the use of coupled electromagnetic-thermal simulation to optimize the minimum magnet mass, preventing demagnetization and meeting performance requirements.
An interactive design workshop will allow the attendees to apply these techniques to their own motor design.
