Analysis in rotational coordinates and magnetic suspension strategy for bearingless drives with 2-pole and 4-pole windings
Akira Chiba
In the previous chapter a primitive bearingless motor was analysed. The primitive bearingless motor has a cylindrical rotor without permanent magnets or squirrel cage conductors so that rotational torque is not generated. The analysis of the primitive bearingless motor is similar to the bearingless motor though it only acts as a radial magnetic bearing; but it is helpful in developing the theory for the bearingless motor.
In this chapter vector control theory for permanent magnet motors is introduced; this theory is also called field-oriented control theory. It derives torque and current relationships using ...
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