Control systems

This line of research involves the study of control algorithms for electric machines with permanent magnets, characterized in particular by high rotation speed. These control algorithms allow to maximize the dynamic performance of the machine with particular reference to the control of torque and acceleration. The control algorithms are developed by coordinating the activities of this line with those dedicated to the study of frequency converters because of the close relationship between the performance of the control system and the converter. We consider algorithms of control without speed sensor and / or position (sensor-less control) to use only measurements of electrical quantities (voltages and / or currents). Sensorless control algorithms are designed to fit the electrical machines dedicated to the project of the motor / generator. The particular issues are linked to the specific design solutions and operating conditions of these motors. The algorithms must ensure accurate control performance, compensating for uncertainty and nonlinearity with innovative and effective strategies also in terms of computational cost. In fact, given the high sampling rates required by these engines, the development of the control should be done in time intervals very low and compatible with the computational capabilities of microcontrollers typically used for industrial applications. The tested techniques will need to ensure accurate performance in the presence of loads and other external uncertain and time-varying stresses, in conditions similar to those expected in actual applications of such engines. In addition, the action performed by the controller will have to present such trends to ensure no additional loss or stress for vibrations and overheatings.