Servizi per la didattica
PORTALE DELLA DIDATTICA

Electrical machines

04LONLI, 04LONLN

A.A. 2024/25

Course Language

Inglese

Course degree

1st degree and Bachelor-level of the Bologna process in Ingegneria Dell'Autoveicolo (Automotive Engineering) - Torino
1st degree and Bachelor-level of the Bologna process in Ingegneria Dell'Autoveicolo - Torino

Course structure
Teaching Hours
Teachers
Teacher Status SSD h.Les h.Ex h.Lab h.Tut Years teaching
Teaching assistant
Espandi

Context
SSD CFU Activities Area context
ING-IND/14
ING-IND/32
2
6
B - Caratterizzanti
F - Altre attività (art. 10)
Ingegneria meccanica
Altre conoscenze utili per l'inserimento nel mondo del lavoro
Valutazione CPD 2022/23
2022/23
Vehicle electrification is continuously gaining momentum. Electrified vehicles span from the battery-electric vehicle and hydrogen-based fuel-cell electric vehicle to many kinds of hybrid solutions, with a starter-generator at the other end of the spectrum.
The course provides the basic knowledge on the operation and modeling of electrical machines for automotive application, focusing on hybrid and electric propulsion systems. The magnetic, mechanical, thermal, and dynamic aspects will be covered, as well as practical aspects such as e-machine identification test procedures. Besides the theoretical aspects, the students will learn the use of simulation models for component level (e-machine) and system level (vehicle) simulations and will become familiar with the technical documentation of e-machines for automotive on the market.
Knowledge of: • The types of electrical machines and their use in the different electrified vehicles • The loss characteristics, thermal behavior, and cooling aspects • The sizing equations of the e-machine • The e-machine dynamic model for electric-drive level simulation • The steady-state model of the e-machine for system level simulation Ability of: • Deriving the e-machine specifications, given the application requirements • Simulate the e-machine steady-state and dynamic behavior • Evaluate the e-machine performance across standard driving cycles Capability of: • Selecting the correct e-machine type for the vehicle application • Assessing and comparing the KPIs of different e-machines • Defining the specifications and KPIs to deal with e-machine suppliers
Knowledge of: • The types of electrical machines and their use in the different electrified vehicles • The loss characteristics, thermal behavior, and cooling aspects • The sizing equations of the e-machine • The e-machine dynamic model for electric-drive level simulation • The steady-state model of the e-machine for system level simulation Ability of: • Deriving the e-machine specifications, given the application requirements • Simulate the e-machine steady-state and dynamic behavior • Evaluate the e-machine performance across standard driving cycles Capability of: • Selecting the correct e-machine type for the vehicle application • Assessing and comparing the KPIs of different e-machines • Defining the specifications and KPIs to deal with e-machine suppliers
Prerequisite knowledge for this course includes: • Fundamentals of electrical and electronic systems • Fundamentals of heat transfer • Simulation in Matlab/Simulink
Prerequisite knowledge for this course includes: • Fundamentals of electrical and electronic systems • Fundamentals of heat transfer • Fundamentals of Matlab codind and fundamentals of Simulink
• E-machines for automotive: overview of vehicle electrification, classification of drivetrain types and e-machine types. Key definitions. • Fundamentals of electromechanical energy conversion. Magnetic circuits: wound field and permanent magnet excitation. Determination of the force and torque of an electric actuator. • DC machine: operating principle of the permanent magnet and wound stator types. Equivalent circuit and dynamic model. Mechanical characteristics, constant torque and constant power speed range, voltage saturation operation. • Thermal behavior of the e-machine: steady-state, transient operation, maximum ratings. • Distributed and concentrated windings for three-phase AC machines • Brushless motor with permanent magnets. Stationary and dynamic model of permanent magnet machines. Fields of application and comparison with the DC drives. • Wound-field synchronous machine. Stationary and dynamic model. Fields of application. • Induction machine. Stationary and dynamic model. Fields of application. • Synchronous reluctance and interior PM machines. Stationary and dynamic model. Fields of application. • E-machine sizing equations and design rules. Finite-Element assisted design of e-machines. Scaling rules of machine dimensions and output figures. • Electrical and mechanical transducers employed in electric motor drives: position, speed and torque transducers, current transducers, voltage transducers
• E-machines for automotive: overview of vehicle electrification, classification of drivetrain types and e-machine types. Key definitions. • Fundamentals of electromechanical energy conversion. Magnetic circuits: wound field and permanent magnet excitation. Determination of the force and torque of an electric actuator. • DC machine: operating principle of the permanent magnet and wound stator types. Equivalent circuit and dynamic model. Mechanical characteristics, constant torque and constant power speed range, voltage saturation operation. • Thermal behavior of the e-machine: steady-state, transient operation, maximum ratings. • Distributed and concentrated windings for three-phase AC machines • Brushless motor with permanent magnets. Stationary and dynamic model of permanent magnet machines. Fields of application and comparison with the DC drives. • Wound-field synchronous machine. Stationary and dynamic model. Fields of application. • Induction machine. Stationary and dynamic model. Fields of application. • Synchronous reluctance and interior PM machines. Stationary and dynamic model. Fields of application. • E-machine sizing equations and design rules. Finite-Element assisted design of e-machines. Scaling rules of machine dimensions and output figures. • Electrical and mechanical transducers employed in electric motor drives: position, speed and torque transducers, current transducers, voltage transducers
In addition to classroom lectures, the following exercise activities are planned. Simulation Laboratory • Circuital and non-circuital dynamic models • DC-machine model • AC-machine model • Use of efficiency maps • Simulation of the driving cycle Visit to the Laboratory • Electrical machine prototypes • Example of components (cut offs, laminations, magnets, transducers) • Test setup for e-machines characterization
In addition to classroom lectures, the following exercise activities are planned. Exercise Laboratory • Circuital and non-circuital dynamic models • DC-machine model • AC-machine model • Use of the efficiency maps • Simulation of the driving cycle Visit to the Laboratory • Electrical machine prototypes • Example of components (cut offs, laminations, magnets, transducers) • Test setup for e-machines characterization
60 hours: Lectures 18 hours: Laboratory, exercises and simulation 3 hours: visit to the laboratory In the academic year 2021/22 the lessons and simulation laboratories will be held in presence. Virtual classroom videos will be made available at the same time, video-recorded, and made available on the “Portale della Didattica”.
60 hours: Lectures 18 hours: Exercise Laboratory 3 hours: e-Machines laboratory
The class notes, the simulation models, the exercises, and the documentation needed for preparing the exam will be provided online via the teaching portal. A useful source of information is found in the following books: • “Electrical Machines”. D. Gerling. Springer, 2016 • “Design of rotating electrical machines”, J. Pyrhonen, T. Jokinen and V. Hrabovcova. John Wiley & Sons, 2013 • “PM motor technology: design and applications”, J.F. Gieras, M. Wing; • “Electric vehicle machines and drives: design, analysis and application”. K.T. Chau. John Wiley & Sons, 2015. • SyR-e: Synchronous Reluctance Evolution (https://github.com/SyR-e )
The class notes, the simulation models, the exercises, and the documentation needed for preparing the exam will be provided online via the teaching portal. A useful source of information is found in the following books: • “Electrical Machines”. D. Gerling. Springer, 2016 • “Design of rotating electrical machines”, J. Pyrhonen, T. Jokinen and V. Hrabovcova. John Wiley & Sons, 2013 • “PM motor technology: design and applications”, J.F. Gieras, M. Wing; • “Electric vehicle machines and drives: design, analysis and application”. K.T. Chau. John Wiley & Sons, 2015. • SyR-e: Synchronous Reluctance Evolution (https://github.com/SyR-e )
Modalità di esame: Prova scritta (in aula); Prova orale obbligatoria;
Exam: Written test; Compulsory oral exam;
Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.
Exam: Written test; Compulsory oral exam;
The exam has a written and an oral part, both given in presence. The written part has a duration of 90 minutes and consists of: - 4 multiple-choice quizzes: 2.0 points per question, -0.67 penalty points for errors - 2 numerical quizzes: 4 points per question. The numerical tolerance allowed on the result will be declared case by case. - 1 open quiz: 4 points max. - One written exercise: 12 total points. The score of the written exam (max 32) will be saturated to 30 and evaluated as follows: • With a score of 16 points or lower, the exam is failed. • A score of 17 or higher implies a mandatory oral examination. The oral exam consists of one or two questions covering the course program. The final score is the average of the written and oral parts scores.
In addition to the message sent by the online system, students with disabilities or Specific Learning Disorders (SLD) are invited to directly inform the professor in charge of the course about the special arrangements for the exam that have been agreed with the Special Needs Unit. The professor has to be informed at least one week before the beginning of the examination session in order to provide students with the most suitable arrangements for each specific type of exam.
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