28560 - Laboratory of Electric Drives

Academic Year 2021/2022

Learning outcomes

•Knowledge of a method for modelling and sizing an electric drive based on a DC machine. •Knowledge of the main architectures of DC / DC converters for the control of DC machines. •Knowledge of switching strategies and of current control techniques for DC / DC converters •Knowledge of closed-loop speed control of a DC drive. •Learning of the design methodology and project validation of a complete DC drive.

Course contents

  • Introduction to Matlab/Simulink modelling of power electronic componnets and circuits
  • Basic modelling of a one quadrant DC/DC converter controlled by PWM
  • Implementation of complete models of one, two and four quadrant DC/DC converter operating in open loop with PWM control
  • Dual level and three level modulation strategies. PWM implementation and performance comparison
  • Current control loop for DC/DC converter regulating current on a RL load. Hysteretic regulator
  • Closed loop current control based on PI regulator. Tuning procedure of PI regulator using root locus analysis
  • Modelling of the DC machine. Electrical and mechanical characteristics. Operation as motor and generator
  • Coupling of the DC machine with typical mechanical loads+E16
  • Torque control of a the DC drive taking into account current limitation
  • Implementation of a speed regulator with closed loop control. Tuning of the speed PI regulator using root locus analysis.
  • Detailed analysis of DC drive operation in transient and steady state operating conditions . Effects of non-ideal components and of saturation blocks introduced in the control systems.
  • Design of the input stage filter of the conveter. Real components selection criteria for passive and active devices.
  • Optimal tuning of the parameters of regulators. Performance analysis of the DC drives with the loads.


MAtlab/Simulink help pages


Suggested for deepening of the course subjects:

Simulation of Power Electronics Circuits using SIMULINK

by: Hadeed Ahmed Sher

Publisher: LAP LAMBERT Academic Publishing (January 22, 2014)

Language: English

ISBN-10: 3659500798

Teaching methods

Interactiive classes in computer room

Assessment methods

Presentation and discussion of a project report related to the design of a DC/DC drive. Data, constrain and expected performance given by the teacher.

Teaching tools

Computer room with desktops available.

Free chairs for using student own laptop.

Instalation on student laptop of free version of Matlab distributed directly from UNIBO website

Office hours

See the website of Claudio Rossi


Affordable and clean energy

This teaching activity contributes to the achievement of the Sustainable Development Goals of the UN 2030 Agenda.