91340 - Advanced Electric Drives M

Learning outcomes

The course aims to provide a deep knowledge on the vector control of AC electric motors. At first, starting from dynamic equation, a control model on d-q axes of the following AC machines will be obtained: AC and DC Brushless Motor; Induction Motor; Synchronous Reluctance Motor; IPM Motor Using modern simulation methods based on Matlab/Simulink tools participants will learn how to design the main control architecture scheme for torque/velocity and position including the effect of torque disturbance as well.

Course contents

Electromechanical energy conversion: Energy and Coenergy. Determination of force / torque delivered by an electric actuator.
Operating principle of the DC machine, both the permanent magnet and wound stator construction. Equivalent circuit and dynamic model. Mechanical characteristic, constant torque and constant power operating area.
Overload operation, introduction of the effective torque concept.

Structure of synchronous machines and brushless motors with permanent magnets. Principle of operation of the trapezoidal and sinusoidal brushless motor. Stationary and dynamic model of permanent magnet machines. Fields of application and comparison with the DC drives.

Structure and operating principle of the induction machine. Dynamic model of induction motors. Field Oriented Control based on Reduced Order Flux Observer

Structure and operating principle of synchronous reluctance and hybrid machines: SyncRel, PMASM,IPM. Dynamic models and vector control.

Position detection: encoder, resolver


Main components of Electrical Drives control chains. Implementation of control: standard regulators and predictive controllers.

Principal electrical and mechanical transducers employed in electric drives: current and voltage transducers; position, speed and torque transducers.

Vector control of AC machines, space vector modulation. Optimal control of electric machines: MTPV and MTPA trajectories.

Readings/Bibliography

Lecture notes

A. E. Fitzgerald , C. Jr. Kingsley , A. Kusko: "Electric machinery", McGraw-Hill Education, 2012.

Teaching methods

Teaching involves theoretical frontal lessons carried out with the help of multimedia systems.
The teaching material will be available at the end of each lesson through the "Dolly" platform (http://dolly.ingmo.unimore.it) and/or TEAMS repository.
The mathematical models introduced will be used for numerical modeling and computer simulation.

Assessment methods

The examination is composed of a practical project and an oral discussion:
1: Practical project comprises drafting a technical report on the sizing, design and simulation of an electrical drive torque/speed control. The deliverable report on the activity carried out, including simulation results will be graded.
2: An oral discussion examination on the course topics, aimed at verifying the knowledge of the course content.

To successfully pass the examination, both tests must be sufficient. The final grade of the examination is determined as follows: 30% from the evaluation of the practical test report and 70% from the oral discussion.

Teaching tools

Matlab+Simulink

Office hours

See the website of Giovanni Franceschini