High efficiency operation control of quasi-Z-source based permanent magnetic synchronous motor drive

In recent years, with the research of indirect matrix converter (IMC) and Z-source / quasi-Z-source (ZS/QZS) boost converters proposed, the relevant scholars combine the two and put forward the QZS-IMC. The topology can greatly expand the voltage gain range, and enhance the anti-interference capability, especially the ability to ride through the grid voltage sag. It has been proved to be a promising converter. However, the research and application of the new converter is still in the exploration stage, and it lacks of in-depth analysis and control. In this paper, the optimal operation control of QZS-IMC is studied and proposed for the QZS-IMC motor drive system, to fulfill high efficiency. Simulation results show that after the drop of input voltage, the system can automatically and optimally regulate the output voltage through optimization of D, so as to improve the performance of IMC in the field of AC speed regulation, and better promote the IMC circuit and QZS circuit to be practical.