93736 - Power Electronic Converters M

Learning outcomes

The course initially provides supplements of linear and non-linear electric circuits with special emphasis towards power electronic circuits for electric vehicles. The digital controllers for power electronic converters are also examined, such as DSP boards, digital microcontrollers, FPGA systems. The main power electronic switches employed in the electric vehicles are introduced, such as power diodes, Mosfets, IGBTs, SiC and emerging power components. The considered converter configurations, and the corresponding modulation strategies, are: passive and active single-phase and three-phase rectifiers (vehicle power interface with the electric grid), three-phase inverters (vehicle motor drive), dc/dc choppers configurations (on board and off board battery chargers). Battery charging modes for electric vehicles are introduced and duscussed. The features Grid-to- Vehicle (G2V), Vehicle-to-Grid (V2G), Vehicle-to-Vehicle (V2V), Vehicle-to-Load (V2L), and Vehicle-for-Grid (V4G) are considered for the regulation of the power converters, with reference to both off board dc fast charging stations and onboard ac chargers.

Course contents

Module I (30h)
Supplements of linear and non-linear electric circuits. Non sinusoidal periodic waveforms. Current and voltage harmonic distortion and powers in non-sinusoidal steady-state. Power diodes and SCRs. Rectifiers: single-phase and three-phase. Power electronic switches: BJT, MOSFET, IGBT, emerging components. Basics of pulse width modulation (PWM). Choppers: buck, boost, buck-boost, Cùk, half-bridge, full bridge.

Module II (30h)
Single-phase inverters: square-wave, PWM. Three-phase inverters: square-wave (six-step), PWM. Common-mode signal injection: centered and discontinuous modulations. Space vector modulation (SVM). Multilevel inverters: cascaded H-bridge, Diode clamped (NPC), Flying capacitor. Modular multilevel converters (MMC). Digital implementation ofmodulation techniques: microcontrollers, DSP boards, FPGA systems.

Readings/Bibliography

- Mohan, Undeland, Robbins: Power Electronics. J.Wiley & Sons

- Rashid: Power Electronics: Circuits Devices and Applications. Prentice Hall

- Kassakian, Schlecht, Verrghese: Principles of Power Electronics. MIT Addison-Wesley

Teaching methods

Classroom lessons (theory and applications). Some practical experiences including DSP/FPGA boards.

Assessment methods

Written and eventually oral exam (interview). Possibility of midterm written exams.

Teaching tools

Lesson notes in English. Use of LTspice and Simulink (Matlab) for circuit simulations.

Italian textbooks are also available. Please directly contact the professor.

Office hours

See the website of Gabriele Grandi

See the website of Mattia Ricco