Speed and fault-tolerant control of a double three-phase synchronous PM motor

In this paper, the operation and control of a double three-phase synchronous PM motor will be analyzed. These motors, belonging to the category of multi-phase motors, are highly significant due to their fault-tolerant properties. After studying the advantages and disadvantages, the Clarke transformation was extended for this motor type, resulting in the Vector Space Demodulation (VSD) transformation. Through this transformation, a physical model of the motor was established, and a speed control scheme was formulated. The motor behavior under open-phase faults during speed control was analyzed, and an active and passive fault-tolerant control were studied. In practical terms, the controls were implemented using dSpace MicroLabBox controllers, and a comparison was made between theoretical and real results.