# Johann Walter Kolar: Catalogue data in Autumn Semester 2020

Name | Prof. Dr. Johann Walter Kolar |

Field | Leistungselektronik |

Address | Leistungselektronik/Kolar ETH Zürich, ETL H 22 Physikstrasse 3 8092 Zürich SWITZERLAND |

Telephone | +41 44 632 28 34 |

Fax | +41 44 632 12 12 |

kolar@lem.ee.ethz.ch | |

Department | Information Technology and Electrical Engineering |

Relationship | Full Professor |

Number | Title | ECTS | Hours | Lecturers | |
---|---|---|---|---|---|

227-0113-00L | Power Electronics | 6 credits | 4G | J. W. Kolar | |

Abstract | Fields of application of power electronic systems. Principle of operation of basic pulse-width modulated and line-commutated power electronic converters, analysis of the operating behavior and of the control oriented behavior, converter design. Reduction of effects of line-commutated rectifiers on the mains, electromagnetic compatibility. | ||||

Objective | Fields of application of power electronic systems. Principle of operation of basic pulse-width modulated and line-commutated power electronic converters, analysis of the operating behavior and of the controloriented behavior, converter design. Reduction of effects of line-commutated rectifiers on the mains, electromagnetic compatibility. | ||||

Content | Basic structure of power electronic systems, applications. DC/DC converters, high frequency isolation, control oriented modeling / state-space averaging and PWM switch model. Power semiconductors, non-idealities, cooling. Magnetic components, skin and proximity effect, design. Electromagnetic compatibility. Single-phase diode bridge with capacitive smoothing, effects on the mains, power factor correction / PWM rectifier. Pulse-width modulated single-phase and three-phase full bridge converter with impressed DC voltage, modulation schemes, space vector calculus. Line-commutated single-phase full bridge with impressed output current, commutation, phase-control, inverter operation, commutation failure. Line-commutated three-phase full bridge converter, impressed output voltage, impressed output current / phase-control. Parallel connection of three-phase line-commutated thyristor circuits, inter-phase transformer. Anti-parallel connection of three-phase line-commutated thyristor bridge circuits, four-quadrant DC motor drive. Load-resonant converters, state plane analysis. | ||||

Lecture notes | Lecture notes and associated exercises including correct answers, simulation program for interactive self-learning including visualization/animation features. | ||||

Prerequisites / Notice | Prerequisites: Basic knowledge of electric circuit analysis and signal theory. | ||||

227-0247-00L | Power Electronic Systems I | 6 credits | 4G | J. W. Kolar | |

Abstract | Basics of the switching behavior, gate drive and snubber circuits of power semiconductors are discussed. Soft-switching and resonant DC/DC converters are analyzed in detail and high frequency loss mechanisms of magnetic components are explained. Space vector modulation of three-phase inverters is introduced and the main power components are designed for typical industry applications. | ||||

Objective | Detailed understanding of the principle of operation and modulation of advanced power electronics converter systems, especially of zero voltage switching and zero current switching non-isolated and isolated DC/DC converter systems and three-phase voltage DC link inverter systems. Furthermore, the course should convey knowledge on the switching frequency related losses of power semiconductors and inductive power components and introduce the concept of space vector calculus which provides a basis for the comprehensive discussion of three-phase PWM converters systems in the lecture Power Electronic Systems II. | ||||

Content | Basics of the switching behavior and gate drive circuits of power semiconductor devices and auxiliary circuits for minimizing the switching losses are explained. Furthermore, zero voltage switching, zero current switching, and resonant DC/DC converters are discussed in detail; the operating behavior of isolated full-bridge DC/DC converters is detailed for different secondary side rectifier topologies; high frequency loss mechanisms of magnetic components of converter circuits are explained and approximate calculation methods are presented; the concept of space vector calculus for analyzing three-phase systems is introduced; finally, phase-oriented and space vector modulation of three-phase inverter systems are discussed related to voltage DC link inverter systems and the design of the main power components based on analytical calculations is explained. | ||||

Lecture notes | Lecture notes and associated exercises including correct answers, simulation program for interactive self-learning including visualization/animation features. | ||||

Prerequisites / Notice | Prerequisites: Introductory course on power electronics. |