MODELING AND CONTROL OF ELECTROMECHANICAL SYSTEMSAnno accademico 2019/2020 - 1° anno
SSD: ING-IND/32 - Convertitori, Macchine e Azionamenti elettrici
Organizzazione didattica: 225 ore d'impegno totale, 146 di studio individuale, 49 di lezione frontale, 30 di esercitazione
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.
Knowledge of the design and operation of most common electromechanical actuators and of their most common control.
Modalità di svolgimento dell'insegnamento
The training objectives are linked both to the acquisition of new knowledge, therefore frontal lessons as a teaching method and include the ability to apply the acquired knowledge through computer and laboratory exercises.
Student attendance is required. Remember that to achieve an optimum result, the student is required to attend at least 70% of the course lessons.
Contenuti del corso
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.
Testi di riferimento
• Mohan: "Power Electronics", Hoeply.
• Fitzgerarld: "Electric Machinery", Mc Graw Hill.
Programmazione del corso
|1||Modeling. Fundamentals of electrotechnical basic principles.|
Modalità di verifica dell'apprendimento
Exams: oral tests - Prerequisites: none
Esempi di domande e/o esercizi frequenti
Characteristic and working principles of most common electrical machines: DC, Induction, Synchronous, Stepper, Switched Reluctances.
Scalar and Vector Control.