Southeast University Power Electronics Fundamentals

Power electronics technology is a technology that integrates control, electricity, and electronics. It uses high-power electronic devices to efficiently transform energy and control its output, thereby providing the required power for various electrical equipment. Its core is the conversion of electrical energy forms, which ultimately converts the power frequency electrical energy of the power grid into electrical energy of different properties and uses. In order to adapt to the different needs of ever-changing electrical devices, frequency conversion technology is an efficient energy-saving measure for fixed power frequencies. Basics of Power Electronics 42 Lectures Southeast University Video Tutorial Power frequency can be said to be the best frequency for power generation, but it is not the best frequency for all electrical equipment, resulting in many equipment operating in low efficiency and low power factor for a long time. The power devices that can improve the efficiency of electricity consumption to a great extent, reduce the power consumption rate, reduce line losses, reduce the emission of pollutants, and provide a sustained, reliable, and high-quality power system are mainly thyristors and devices derived from it. With the combination of microelectronics technology and electronic power technology, many new devices have been produced. For example: it can turn off thyristors, power transistors, high-power field effect transistors, etc. The general development trend: large capacity, high frequency, modularization, and power integration. Power electronic circuits are based on power electronic devices as the core, and realize the conversion and control of electrical energy through different circuits and various controls. Electronic power circuits mainly include: DC-AC conversion circuit: a circuit that converts DC power into AC power, also known as an inverter circuit. (3) DC-DC conversion circuit: A circuit that converts fixed DC power into adjustable DC power, also known as DC chopper circuit. AC-AC conversion circuit: A circuit that converts AC power of a certain frequency into AC power with adjustable amplitude, frequency or phase.

• Chapter 1：Power electronics basics (39 minutes and 23 seconds)

• Chapter 2：Power electronics basics (44 minutes and 26 seconds)

• Chapter 3：Power electronics basics (41 minutes and 24 seconds)

• Chapter 4：Power electronics basics (49 minutes and 58 seconds)

• Chapter 5：Power electronics basics (40 minutes and 54 seconds)

• Chapter 6：Power electronics basics (42 minutes and 15 seconds)

• Chapter 7：Power electronics basics (42 minutes and 58 seconds)

• Chapter 8：Power electronics basics (40 minutes and 13 seconds)

• Chapter 9：Power electronics basics (40 minutes and 26 seconds)

• Chapter 10：Power electronics basics (43 minutes and 14 seconds)

• Chapter 11：Power electronics basics (43 minutes and 13 seconds)

• Chapter 12：Power electronics basics (44 minutes and 43 seconds)

• Chapter 13：Power electronics basics (41 minutes and 20 seconds)

• Chapter 14：Power electronics basics (46 minutes and 31 seconds)

• Chapter 15：Power electronics basics (43 minutes and 55 seconds)

• Chapter 16：Power electronics basics (46 minutes and 23 seconds)

• Chapter 17：Power electronics basics (46 minutes and 9 seconds)

• Chapter 18：Power electronics basics (40 minutes and 28 seconds)

• Chapter 19：Power electronics basics (42 minutes and 14 seconds)

• Chapter 20：Power electronics basics (45 minutes and 4 seconds)

• Chapter 21：Power electronics basics (43 minutes and 7 seconds)

• Chapter 22：Power electronics basics (43 minutes and 20 seconds)

• Chapter 23：Power electronics basics (44 minutes and 47 seconds)

• Chapter 24：Power electronics basics (42 minutes and 8 seconds)

• Chapter 25：Power electronics basics (42 minutes and 9 seconds)

• Chapter 26：Power electronics basics (42 minutes and 17 seconds)

• Chapter 27：Power electronics basics (41 minutes and 46 seconds)

• Chapter 28：Power electronics basics (41 minutes and 9 seconds)

• Chapter 29：Power electronics basics (44 minutes and 9 seconds)

• Chapter 30：Power electronics basics (44 minutes and 5 seconds)

• Chapter 31：Power electronics basics (41 minutes and 12 seconds)

• Chapter 32：Power electronics basics (42 minutes and 50 seconds)

• Chapter 33：Power electronics basics (52 minutes and 6 seconds)

• Chapter 34：Power electronics basics (36 minutes and 52 seconds)

• Chapter 35：Power electronics basics (50 minutes and 11 seconds)

• Chapter 36：Power electronics basics (47 minutes and 28 seconds)

• Chapter 37：Power electronics basics (42 minutes and 37 seconds)

• Chapter 38：Power electronics basics (41 minutes and 31 seconds)

• Chapter 39：Power electronics basics (42 minutes and 28 seconds)

• Chapter 40：Power electronics basics (44 minutes and 12 seconds)

• Chapter 41：Power electronics basics (43 minutes and 59 seconds)

• Chapter 42：Power electronics basics (58 minutes and 31 seconds)