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.