A dual-stage matrix converter with fault-tolerant function and its fault-tolerant control method

Abstract

The invention provides a two-stage matrix converter with fault-tolerant function and a fault-tolerant control method thereof. The present invention introduces a fault-tolerant circuit on the basis of the general two-stage matrix converter topology. The fault-tolerant circuit is a bridge arm composed of two bidirectional switch tubes drawn from the neutral point of the three-phase input AC power supply. The two ends are respectively connected with the positive and negative ends of the DC bus side of the rectification stage circuit. By separately controlling the two bidirectional switches in the fault-tolerant circuit, the present invention can enable the dual-stage matrix converter to provide the load with High-quality power for fault-tolerant operation.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a two-stage matrix converter, in particular to a two-stage matrix converter with a fault-tolerant function and a fault-tolerant control method thereof. Background technique [0002] Fault tolerance is short for fault tolerance. With the development of science and technology, the requirements for the stability and reliability of the power supply system are getting higher and higher. In some applications, such as high-tech fields such as aerospace, power converters are required to have the ability to achieve fault-tolerant operation under fault conditions. Power devices are the basic devices that constitute various power converters. When the power devices are damaged, the power converter will lose its operating capability and even cause catastrophic consequences. Therefore, it is very necessary to study the fault-tolerant control of power converters. . [0003] Two-stage ...

AI Technical Summary

Problems solved by technology

[0004] The two-stage matrix converter can be divided into a rectification stage and an inverter stage according to the topology structure. The rectification stage performs chopping control on the three-phase input voltage to supply power to the subsequent inverter stage. In the practical application of TSMC, if the rectification stage bidirectional switch Faults such as damage or loss of driving signals will inevitably have a serious impact on the output voltage quality of the inverter stage, which will lead to a decline in the performance of the entire TSMC system or even out of control. Therefore, it is essential to carry out research on fault-tolerant technology for TSMC rectifier stages.

Images