The goal of the course is to learn basic physical principles and mathematically described relations used in pulse converters (including electromagnetism). Further the principles of basic DC/DC, DC/AC and AC/DC converters are explained. Also principles and mathematical background regarding feedback control systems are studied.

Lectures and corresponding exercises:

1. Quantities in electromagnetism (magnetic flux, flux density, flux linkage, magnetic conductivity, magnetic resistance / reluctance, permeability, magnetic intensity, magnetic voltage, inductance), mutual mathematical relations and physical meaning. Laws used in electromagnetism (Amper´s law, Faraday´s induction law, Hopkinson´s law).
2. Understanding the relations between electrical and magnetic coil quantities, practical results of the Faraday´s induction law, current and voltage supply of a coil – important consequences.
3. Detailed analysis of a voltage transformer.
4. Design of a choke inductor with a feromagnetic core and an air gap.
5. Energy and instantaneous power, average (true) power definition, relations between mechanical power, torque and speed, relations between electrical power, voltage and current.
6. Active power consumed from an ideal DC voltage source loaded with a time-variable current, ideal DC current source loaded with a time-variable voltage, diode power loss conducting a time-variable current, conduction losses of MOSFETs and IGBTs.
7. Static and dynamic parameters of MOSFETs and IGBTs, static and dynamic properties of power diodes, explanation the reasons of necessary using ultra-fast diodes in transistor converters.
8. Analysis of a turn-on and turn-off process of a switching power transistor.
9. DC/DC step-down converter operating in first quadrant, description, explanation of the principle and consequences, mathematical analysis, current ripple, current and thermal stress of the output capacitor, output voltage ripple, problems of switching frequency, PWM, losses and other consequences.
10. DC/DC converter operating in 1. and 2. quadrant, explanation of the step-up principle, motor and generator regime of the machine (electric motor), regenerative braking.
11. One-phase and three-phase DC/AC (AC/DC) converters, control algorithms, sinusoidal PWM and algorithms of its creation.
12. Principle of feedback control, system description using transfer functions, Bode stability criterion.
13. Explanation of the aim, properties and understanding the behavior of P, I and PI controllers.