Abstract
A bearingless wound-rotor induction motor has been presented in this paper. Ansoft/Maxwell has been used to compute the transient response of radial force and torque in bearingless induction motor. The results show that a constant torque is independent of the suspension currents can be generated and a steady radial force can support the shaft weight. Compared to the bearingless squirrel cage induction motor, the proposed bearingless wound-rotor induction motor can generate a larger radial force and a more constant torque that is independent of the suspension currents. An Improved Space Vector Modulation Direct Torque Control (ISVM-DTC) method has been presented to realize the steady control of bearingless wound-rotor induction motor.
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