Designing adaptive current controller for two axial flux permanent magnet synchronous motors connected by one shaft

Abstract

When choosing axial flux permanent magnet (AFPM) motor with the configuration of double stator module at two sides of in-between disc-shaped rotor, it can be obviously considered as two mechanical coupled motors. With the use of magnetic bearings at the two ends of the shaft, the rotor can be rotating and also have these motions: vertical translation, horizontal translation and gyroscopic effects. At that time, the difference between electric currents in the two stators will be significant. This paper introduces a design of adaptive current controller to balance out the loads onto the mentioned motors.