|
Teacher
|
MINUCCI Simone
(syllabus)
Part 1: Control Engineering (6CFU) 1. INTRODUCTION • Dynamic Systems. Control of dynamic systems: formulation and first examples. Architectures of control systems (open-loop, closed-loop).
2. DYNAMCAL SYSTEMS • Models of fundamental systems. Dynamic linear systems in time domain. • Laplace Transformation. Transfer Function: definition, properties and use. Poles, Zeros and Gain. • Equivalence transformation and duality transformation. • Stability analisys of dynamic linear systems. Stability criteria. • Block diagrams. • Free response and signal response. Canonical response of first and second order systems. • Frequency Response: definition, and relationship with transfer function. Graphical representation of frequency response: Bode diagram, Nyquist Diagram, Nichols diagram. I order and II order filters. Time-Frequency relationships.
3. STATE FEEDBACK CONTROL • Controllability of dynamic linear systems. • State feedback of dynamic linear systems. Design of a state feedback regulator. • Observability of dynamic linear systems. • State feedback of dynamic linear systems by state estimation. Design of an asymptotic observer.
4. FEEDBACK CONTROL • Formalization of a simple control problem. Classification of control systems. • Feedback control systems: features and properties. • Stability: Nyquist and Bode criteria. • Static Performances: steady state error. Dynamical Performances: response speed, bandwidth, stability order. • Stability Margin. Relationship between feedback and feedforward control systems. • Design of a controller: requirements. Static and dynamic design. Compensations. PID regulators.
Part 2: Electrical Machines (6 CFU) 5. INTRODUCTION • General considerations, operation principles and classification of electrical machines. • Electrical machines heating.
6. TRANSFORMERS • Single-phase transformers: general considerations, operation principles, mathematical model, phasor diagrams and test. • Three-phase transformers: manufacturing aspects, operation principles, electrical connection of the windings. • Special transformers: autotransformers, current transformers and voltage transformers. • Parallel connection between single-phase and three-phase transformers. • Grid connection transients and short circuit transients for transformers
7. INDUCTION MACHINES • Electromechanical conversion; operation principles, classification and manufacturing characteristics of electrical machines. Galileo Ferraris law. • Three-phase induction machines: general considerations, manufacturing aspects, mathematical model, phasor diagrams and operation principles. Electromagnetic torque of an induction machine. Start and steady state rotation of a three-phase induction machine. Squirrel-cage induction motors. Three-phase induction generators. Efficiency and test of a three-phase induction motor. • Single-phase induction machine: general considerations, classification, operation principles, start and steady state rotation.
8. SYNCHRONOUS MACHINES • Synchronous machines: classification, general considerations, manufacturing aspects, operation principles, mathematical model, phasor diagrams, open-circuit characteristic, armature reaction, short circuit characteristic, magnetic saturation, self-excitation of synchronous geneators. • Anisotropic synchronous machines: manufacturing aspects, operation principles, mathematical model, phasor diagrams. Power angle of a synchronous generator. Electromagnetic torque at the rotor of a synchronous generator. • Parallel connection of synchronous generators: requirements for the connection and ancillary services (P-f reglation and E-V regulation). • Synchronous motors: operating principles, mathematical model, equivalent circuits, current diagrams. • Synchronous machines dynamics and short circuit transient at alternators’ connections.
9. DC ELECTRICAL MACHINES • Manufacturing aspects, operation principles, general considerations and classification of DC electrical machines. • DC Generators: types of excitation, mathematical model, equivalent circuits and operating principles. • Separately excited DC motors: mathematical model, equivalent circuit, operating principles and speed regulation.
10. BRUSHLESS MOTORS • DC Brushless motors: manufacturing aspects, operation principles, mathematical model. Trapezoidal control technique. Torque characteristics. • AC Brushless motors: manufacturing aspects, operation principles, mathematical model. Sinusoidal control technique. Torque characteristics. • DC and AC brushless comparison. Traditional and brushless motor drives comparison.
11. STEPPER MOTORS • Stepper motors: classification, manufacturing aspects, operation principles, mathematical model. Electromagnetic torque. • Permanent magnets stepper motors: manufacturing aspects, operation principles, driving and control. • Variable reluctance stepper motors: manufacturing aspects, operation principles, driving and control. • Hybrid stepper motors: manufacturing aspects, operation principles, driving and control.
(reference books)
1. F. White, Principles of Control Engineering, Elsevier 2. L. Keviczky, R. Bars, J. Hetthéssy, C. Bányász, Control Engineering: MATLAB Exercises, Springer 3. T. Wildi, Electrical Machines, Drives and Power Systems, Pearson College Div
|