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Electrical drives for eMobility

02TVTLO

A.A. 2021/22

Course Language

Inglese

Course degree

Master of science-level of the Bologna process in Automotive Engineering (Ingegneria Dell'Autoveicolo) - Torino

Borrow

01UTFLO

Course structure
Teaching Hours
Lezioni 52
Esercitazioni in aula 14
Esercitazioni in laboratorio 14
Teachers
Teacher Status SSD h.Les h.Ex h.Lab h.Tut Years teaching
Bojoi Iustin Radu Professore Ordinario ING-IND/32 52 0 0 0 3
Teaching assistant
Espandi

Context
SSD CFU Activities Area context
ING-IND/32 8 C - Affini o integrative A12
2021/22
The course aims at providing to the students the basic concepts of the electrical energy conversion systems employed in transportation electrification, with a particular focus on hybrid and electrical vehicles. The systems under study will be the electrical drives for powertrains and the battery chargers. The electrical motors belong to the new generations of eMotors dedicated to electrical traction, such as induction motors, synchronous reluctance motors and internal permanent magnet motors. The course will provide also the basic concepts of vector control of traction drives, along with testing techniques to obtain efficiency maps and torque production maps.
The course aims at providing to the students the fundamental concepts of the electrical energy conversion systems employed in transportation electrification, with a particular focus on hybrid and electrical vehicles. The systems under study will be the electrical drives for powertrains (traction battery, inverter, eMotor) and the battery charging systems along with the related infrastructure for the connection of the vehicles to the grid. The electrical motors belong to the new generations of eMotors dedicated to electrical traction, such as surface mount permanent magnet motors (SMPM), induction motors (IM), internal permanent magnet motors (IPM), and PM-assisted synchronous reluctance motors (PM-SyR). Using a systemic approach, the course will focus on energetic simulation models of all elements of a powertrain able to consider the efficiency maps of each element and the specific limitations acting on the generated torque. The course will provide also the basic concepts of vector control of traction drives.
Capability to understand the structure of a traction electrical drive consisting of a power electronic converter and an electrical machine. Ability to compare different electric drive solutions based on different motor technologies. Capacity to design or to tune the control loops (torque, current, speed) of an electric drive.
• Capability to understand the structure of a traction electrical drive consisting of battery, power electronic converters and electrical machines. • Capability to understand the technologies used for the power electronic switches and their packaging. • Ability to compare different electric drive solutions based on different motor technologies. • Ability to provide the right specifications for the components of an electrical powertrain, according to the vehicle specifications. • Capacity to develop or use proper simulation models for the simulation of power converters and eMotors that must be embedded in larger vehicle models.
Fundamentals in electrical circuits, electrical machines, automatic control or the basic concepts in systems theory.
Fundamentals in electrical circuits, electrical machines, automatic control or the basic concepts in systems theory.
• Introduction: general description of an electric drive • Power electronic devices used in power electronic converters • Basic operation principles of a switch-mode power electronic converter. Canonical commutation cell. • DC/DC converters for eMobility. • DC / AC converters (inverters) for eMobility. • Electrical motor solutions for eMobility: induction motor, synchronous reluctance motor, internal permanent magnet motor • Fundamental concepts of vector control for AC motors fed by inverters • Vector control of eDrives: design of the drive control loops (current, speed and position). • Implementation issues of high performance vector control of eMotors: Maximum Torque per Ampere (MTPA), Maximum Torque per Volt (MTPV), torque estimation, computation of maximum torque according to the voltage and current limits • Advanced testing of eDrives. • Battery chargers: on-board and off-board solutions.
• Introduction: definition of eMobility and presentation of most generic structure of an eDrive • eDrives for Architectures of Hybrid and Electrical Vehicles • Energy sources for eMobility: batteries, ultracapacitors, fuel-cells • Fundamental concepts of power converters: classification, switch-mode power converters, canonical switching cell, inductors and capacitors • Power electronic devices used in power electronic converters: diode, MOSFET, IGBT, WBG devices, packaging solutions and thermal modeling • AC-DC converters for eMobility • DC/DC converters for eMobility. • DC / AC converters (inverters) for eMobility. • Electrical motor solutions for eMobility: induction motor, synchronous reluctance motor, internal permanent magnet motor • Fundamental concepts of torque control for eMotors • Fundamental concepts of the control of power converters and eDrive • Fundamental concepts of vector control of AC machines • Classification of e-motor solutions and torque production of AC e-motors • Vector control of AC motors for eMobility • Battery chargers: on-board and off-board solutions.
In addition to classroom lectures, laboratory activities are planned. The laboratory exercises concern the analysis of the operation of an electric drive with internal permanent magnet motor.
In addition to classroom lectures presenting theoretical concepts, the following exercise activities are planned: • Battery modeling and simulation using solutions available on electrical vehicles. • Inverter simulation using circuital models and dynamic average models. • Laboratory exercise on a three-phase inverter. • Electrical motors modeling and simulation. • Laboratory exercise on an eMotor fed by inverter and using torque control.
• Neil Storey “Electronics: a system approach”, Pearson Education • T.L. Floyd “Electronic Devices”, Prentice Hall • Ned Mohan, Tore Undeland, Tim Robbins, "Elettronica di Potenza", Edizioni Hoepli • Rashid, M. H., 'Elettronica di Potenza', Prentice Hall • John Kassakian, Marting F. Schlecht, George V. Verghese, “Principles of Power Electronics”, Pearson Education.
• Rashid, M. H., 'Elettronica di Potenza', Prentice Hall • Ali Emadi, "Advanced Electric Drive Systems", CRC Press, 2014. • Chris Mi, “Hybrid Electric Vehicles”, John Wiley&Sons, 2018.
Modalità di esame: Prova scritta (in aula);
Exam: Written test;
The exam consists of a written test of 150 minutes, containing multiple choice questions (24 points) and a question with open answer (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. In addition, during the teaching students will be given a report to be elaborated at home, regarding the sizing of an electric drive and the design of the its torque control scheme. The report is rated up to 30 points. The final score is calculated as the weighted arithmetic mean between the written test (80%) and the score obtained for the report (20%). The rules of examination are described and discussed during the introductory class.
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;
The exam consists of a written test of 150 minutes, containing multiple choice questions (24 points) and a question with open answer (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. The rules of examination are described and discussed during the introductory class.
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.
Modalità di esame: Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo; Elaborato progettuale in gruppo;
The exam consists of a written test of 150 minutes, containing multiple choice questions (24 points) and three fast numerical computations (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. In addition, during the teaching students will be given a report to be elaborated at home, regarding the sizing of an electric drive and the design of the its torque control scheme. The report is rated up to 30 points. The final score is calculated as the weighted arithmetic mean between the written test (80%) and the score obtained for the report (20%). The rules of examination are described and discussed during the introductory class.
Exam: Computer-based written test using the PoliTo platform; Group project;
The exam consists of a written test of 150 minutes, containing multiple choice questions (26 points) and three fast numerical computations (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. The rules of examination are described and discussed during the introductory class.
Modalità di esame: Elaborato scritto prodotto in gruppo; Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo;
The exam consists of a written test of 150 minutes, containing multiple choice questions (24 points) and three fast numerical computations (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. In addition, during the teaching students will be given a report to be elaborated at home, regarding the sizing of an electric drive and the design of the its torque control scheme. The report is rated up to 30 points. The final score is calculated as the weighted arithmetic mean between the written test (80%) and the score obtained for the report (20%). The rules of examination are described and discussed during the introductory class.
Exam: Group essay; Computer-based written test using the PoliTo platform;
The exam consists of a written test of 150 minutes, containing multiple choice questions (24 points) and three fast numerical computations (6 points). During the exam, the use of books, notes or equivalent materials is not allowed. The rules of examination are described and discussed during the introductory class.
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