MODELING AND CONTROL OF ELECTROMECHANICAL SYSTEMS

The course has the purpose to provide the fundamentals of modeling, principles of operation and control, main basic knowledge and future developments of electrical and electromechanical conversion systems.

Learning outcomes:

Knowledge of the design and operation of most common electromechanical actuators and of their most common control.

None.

Student attendance is required. Remember that to achieve an optimum result, the student is required to attend at least 70% of the course lessons.

Electromechanical systems. Energy balance and conservative systems: determination of electromagnetic forces and torques. General information on electrical machines: materials, losses, efficiency, thermal behavior and types of service. Transformer: Principle of operation; HF transformers. Asynchronous machine: MMF of distributed windings and equations, pole pairs, equivalent circuit, slip, electromagnetic torque; no-load and locked- rotor tests, starting, single-phase induction motors. Synchronous machine: starting cage and damper windings, equivalent circuit, load angle, synchronous and reluctance torque; interconnected synchronous generators. Special synchronous machines: permanent magnet motors, synchronous reluctance motors, stepper motors, switched reluctance motors, brushless DC motors. DC machines: commutator action, load operation, DC motors, shunt excitation generators, series excitation motors. Universal motor. Control of electromechanical systems: rectifiers, converters for DC and AC electrical machines, electrical drives. Digital modulation techniques: PWM, space vector. VSI and CSI. DC and AC motor drives. Scalar control. Current control. V by f constant drives. Stepper motors control. Switched reluctance motor control. Vector control of asynchronous, synchronous and permanent magnet machines.

• Mohan: "Power Electronics", Hoeply.
• Fitzgerarld: "Electric Machinery", Mc Graw Hill.

http://studium.unict.it/dokeos/2017/

Exams: oral tests - Prerequisites: none

An intermediate test after the first 1/3 of the program.

The test is not mandatory and is a written test in english with 10 open questions or more.

None.

Characteristic and working principles of most common electrical machines: DC, Induction, Synchronous, Stepper, Switched Reluctances. Scalar and Vector Control. Generalized Theory.