Power Electronics 1

• understand and analyze both known and unknown converter topologies
• identify the fundamental control methods (current mode/voltage mode) used in switch mode converters
• evaluate advantages and disadvantages of different converter topologies with respect to a given application
• design ferrite transformers for switch mode converters
• design inductors for switch mode converters
• design input filters for switch mode converters
• design output filteres for switch mode converters
• perform simple calculations/simulations on the feedback circuit in switch mode converters
• evaluate suitability and applicability of different power electronic components, active as well as passive
• perform a basic design of a converter for a given application

Section 1: Course Introduction
Section 2: Non-isolation DC-DC Converters
Basic concepts and definitions; Analysis of basic power circuits: Buck, Boost, and Buck-Boost; Calculation of components stress factors.
Section 3: Isolation DC-DC Converters
Choice and analysis of Isolated converter topologies: Flyback, Forward, Push-Pull, Half-Bridge, Full-Bridge, SEPIC, Cuk; Steady state transfer functions; Voltages and currents waveforms in the circuit; Continuous and discontinuous conduction mode; Selection of power-semiconductors and passive components; Snubber circuits.
Section 4: Magnetic Components Design
Basic magnetic theory; Transformer and inductor models; Loss models; High frequency skin and proximity effects; Transformers & Inductors design examples.
Section 5: Input filter & Output filter Design
Output filter design considerations: voltage ripple, load step, ESR. Input filter design criterias: high frequency attenuation, Middlebrook’s impedance inequlities theory
Section 6: Controller Design
Feedback loop stability; Choice and design of control and protection circuits (Error-amplifiers, Auxiliary supply, undervoltage – and overvoltage protection, current limit etc.). Driver circuits. PWM-, voltage- and current-mode control.

31351/31001/31003/31039

Overview class lectures and project work/assignments

This course has a natural comtinuation in 34653 Power Electronics 2, lab. course. (original course no. 31353)
E-learning is used in the form of on-line voting systems, on-line quiz (home assignments), chat room, discussion board or blog and web-based tools.