This document discusses a three-phase inverter that converts DC power to AC power. It focuses on voltage source inverters with a three-phase output. The project plans to build a block diagram for a new three-phase inverter with an input of 24V DC, an output voltage of 12V RMS at 50Hz, a switching frequency of 10kHz, a settling time of 0.5s, and a total harmonic distortion of less than 5%. The previous control strategy used PI controllers to regulate the three-phase inverter output.

2. DC-AC three-phase Inverter
Group 16:
Hoàng Ngọc Ánh
Nguyễn Bình Minh
Hoàng Vũ
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3. Introduction
• DC – AC: converts DC power to AC power, with the input of a DC source with
fixed magnitude and the output of an AC current or voltage
• Multiple source types: current source, voltage source, Z-source inverters
• For this project, we will focus on Voltage source inverters
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4. Introduction
• Depending on the phases, there will be single-phase, three-phase and multi-
phase inverters
• For this project, we will focus on the digital control of three-phase inverter
• Current plans: building block diagram of the new three-phase inverter
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Figure 1: Control strategy of previous project: three-phase inverter using PI controllers

5. Specification
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• Input DC voltage: 24VDC
• Output RMS voltage: 12Vrms - 50Hz
• Switching frequency: 10kHz
• Short settling time: 0.5s
• Total harmonic distortion: <5%

6. THANK YOU !
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