Spherical Induction Motor—Speed Control Using VFD

The study presents the design and control of a 3-degree-of-freedom (DOF) spherical permanent magnet actuator with a high specific torque. This motor employs a two-layer rotor coated on the outermost layer, as well as four separate spherical curved linear induction motors that are mutually orthogonal. To achieve multiple DOF rotations around any one of the axes, the motor may create output torque in any direction directly on the outside surface. A six-pulse VDF successfully controls the motor. No motor has been constructed that can reliably rotate a spherical rotor across randomly huge angles between any compound of three independent axes using an induction principle. Furthermore, the findings of the analysis might be quite useful for structural optimization. According to the study, a spherical induction motor consists of a spherical rotor and a series of curved inductors arranged around the spherical rotor. The rounded inductors are positioned in such a way that the spherical rotor is continually rotated between any combination of three independent axes. The simulation model yields output waveform findings suggesting successful motor speed control.