Design of IGBT single-phase half-bridge passive inverter circuit

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Overview:
The topic of this course design is the design of IGBT single-phase half-bridge passive inverter circuit, and design the corresponding trigger circuit. According to the relevant knowledge of power electronics technology, the single-phase bridge inverter circuit is a common inverter circuit. Compared with the rectifier circuit, the circuit that converts the direct current into alternating current becomes the inverter circuit. When the AC side is connected to the power grid, it is called active inverter. When the AC side is directly connected to the load, it is called passive inverter. The inverter circuit has a wide range of applications in real life.

In this design, the main circuit of the circuit consists of four parts: AC power supply, rectification, filtering and half-bridge inverter circuit. The drive circuit and the drive power supply constitute the control circuit that controls the correct operation of the inverter bridge in the main circuit. Insulated-gate Bipolar Transistor used in the design, abbreviated as IGBT in English. It is a typical full control device. It combines the advantages of GTR and MOSFET and has good characteristics. It has become the leading device for medium and high power power electronic equipment. In this paper, the waveform simulation and analysis of the IGBT single-phase half-bridge passive inverter circuit are carried out.

The system scheme system scheme is shown in Figure 1. In the circuit principle block diagram, the four parts of the AC power supply, rectification, filtering and half-bridge inverter circuit form the main circuit of the circuit, and the driving power supply and the drive circuit form the opposite of the command main circuit. The control circuit that the bridge works correctly. The functions of the three parts of the alternating current power supply, the rectification and the filtering are respectively realized by an alternating current transformer, a full bridge rectifier module and two electrolytic capacitors connected in series; the half bridge inverter circuit is composed of a half bridge inverter and a buffer circuit; The drive circuit needs to be built according to the requirements of the actual circuit.


Figure 1 circuit schematic (please read the PDF for details)