Z-source inverter circuit

Abstract

The invention relates to the electronic circuit technology, in particular to a Z-source inverter circuit. The Z-source inverter circuit comprises a Z-source network and a single phase inverter circuit. The Z-source inverter circuit is characterized in that the Z-source network is composed of a diode D1, a diode D2, an inductor L1, an inductor L2, a capacitor C1, a capacitor C2, an IGBT transistor S1, an IGBT transistor S2, an IGBT transistor S3 and an IGBT transistor S4. The drain electrode of the S1 is connected with the positive electrode of a power source E, and the source electrode of the S1 is connected with the negative electrode of the diode D1. The source electrode of the S1 passes through the inductor L1 and then is connected with the drain electrode of the S2. The source electrode of the S1 sequentially passes through the inductor L1, the diode D2 and the capacitor C2 and then is connected with the drain electrode of the S3 and the drain electrode of the S4. The positive electrode of the diode D1 is connected with the negative electrode of the power source E, and the positive electrode of the diode D1 sequentially passes through the inductor L2 and the capacitor C1 and then is connected with the source electrode of the S1. The positive electrode of the diode D1 is connected with the source electrode of the S3. The Z-source inverter circuit has the advantages that the starting impact problem and the overlarge device stress problem of the system can be effectively solved, and meanwhile wide-range and effective adjusting can be conducted on the output power of the inverter circuit. The Z-source inverter circuit is particularly suitable for Z-source inverter circuits.

Description

technical field [0001] The invention belongs to electronic circuit technology, and in particular relates to a Z source inverter circuit. Background technique [0002] The inverter circuit is a circuit that converts DC power (batteries, storage batteries, or energy sources similar to DC power sources, such as AC power that is similar to DC after rectification) into AC power, and is widely used in industry. The inverter circuit can be used to form various AC power sources. Among the various existing power sources, storage batteries, dry batteries, solar cells, etc. are all DC power sources. When these power sources are required to supply power to AC loads, an inverter circuit is required. In addition, inverters are used in power electronic devices such as frequency converters for AC motor speed control, uninterruptible power supplies, induction heating power supplies, and photovoltaic power generation systems. [0003] Currently widely used inverters based on DC-DC circuits s...

AI Technical Summary

Problems solved by technology

[0006] The beneficial effect of the present invention is that it can effectively solve the problems of system start-up impact and excessive device stress, and at the same time, the output power of the inverter circuit can be adjusted in a wide range and effectively. When the upper and lower bridge arms of the inverter circuit are simultaneously conducted When (that is, the bridge arm is straight-through), it can protect the system from burning the device due to a short circuit

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