Lecture 2 EE 4109 Threephase inverters Reference Book
Lecture 2 EE 4109 Three-phase inverters Reference Book: Power Electronics: Circuits, Devices, and Applications by Muhammad H. Rashid 9/11/2021 Department of EEE, KUET 1
This lecture is for Learning Outcome 3 (LO 3): At the end of the course students will be able to identify and design DC-AC converters (inverters) and their gate driver circuits q Three-phase inverters 9/11/2021 Department of EEE, KUET 2
Three-Phase Inverters Consider three single-phase inverters in parallel, driven 120° apart. 9/11/2021 Department of EEE, KUET 3
Three-Phase Inverter (continued) Three single-phase full bridge inverters 12 transistors, 12 diodes, 3 transformers Could it be simpler? 9/11/2021 Department of EEE, KUET 4
Alternative (Preferred) Configuration 6 transistors, 6 diodes conduction for 120° or 180° 9/11/2021 Department of EEE, KUET 5
180° Conduction • Three transistors ON at a time 9/11/2021 Department of EEE, KUET 6
Waveforms for 180 Conduction 9/11/2021 Department of EEE, KUET 7
Summary Table 9/11/2021 Department of EEE, KUET 8
Phase Voltages for 180 Conduction 9/11/2021 Department of EEE, KUET 9
Waveforms for 180 Conduction 9/11/2021 Department of EEE, KUET 10
Summary Table 9/11/2021 Department of EEE, KUET 11
Mode 1 Operation 9/11/2021 Department of EEE, KUET 12
Mode 1 Operation Q 1, Q 5, Q 6 conduct 9/11/2021 Department of EEE, KUET 13
Summary Table 9/11/2021 Department of EEE, KUET 14
Mode 2 Operation 9/11/2021 Department of EEE, KUET 15
Mode 2 Operation Q 1, Q 2, Q 6 conduct 9/11/2021 Department of EEE, KUET 16
Summary Table 9/11/2021 Department of EEE, KUET 17
Mode 3 Operation 9/11/2021 Department of EEE, KUET 18
Mode 3 Operation Q 1, Q 2, Q 3 conduct 9/11/2021 Department of EEE, KUET 19
Phase Voltages for 180 Conduction 9/11/2021 Department of EEE, KUET 20
Fourier Series for Line-to-Line Voltages 9/11/2021 Department of EEE, KUET 21
For the other Line-to-Line Voltages 9/11/2021 Department of EEE, KUET 22
Line-to-Line rms Voltage 9/11/2021 Department of EEE, KUET 23
rms value of the nth Component Fundamental Component 9/11/2021 Department of EEE, KUET 24
Line-to-Neutral Voltages 9/11/2021 Department of EEE, KUET 25
Phase Voltages (Y-connected load) 9/11/2021 Department of EEE, KUET 26
Line Current for an RL load 9/11/2021 Department of EEE, KUET 27
Three-Phase Inverter with RL Load 9/11/2021 Department of EEE, KUET 28
Home Work 6. 5. 2 120–Degree Conduction Example 6. 4: Finding the output voltage and current of a 3 -ϕ full-bridge inverter with an RL load End of Lecture 2 9/11/2021 Department of EEE, KUET 29
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