矩阵变换器（MC）在交流调速系统中的应用一直倍受关注。但是，传统MC的电压增益低(小于0.866)、抗干扰能力差,现有Z源间接MC因Z源加在直流环节导致非全硅化，现有Z源直接MC换流复杂，而且它们都需增加输入LC滤波器，复杂或功能受限的MC现状制约了其在变频调速中广泛应用。 本课题提出一体化LC滤波器与Quasi-Z源的间接MC，将其应用于交流调速系统。通过LC滤波器与Quasi-Z源一体化，使新Quasi-Z源间接MC系统结构简化、功能提升，比如扩展MC电压增益，实现电机系统对电网电压跌落的穿越能力。首先，提出此类拓扑结构并建立其数学模型；其次，提出其调制方法、参数设计方法、控制策略等内容，并通过仿真验证；此外，搭建实验平台并进行实验研究和验证；最终，实现对上述拓扑、调制方法和控制策略等一般规律的探索。该项目将为Z源MC在交流变频调速领域应用奠定基础，为其产业化提供理论基础和实验验证。

Matrix converters have been increasingly studied for applications to AC variable frequency drives. However, conventional matrix converters present the low voltage gain less than 0.866 and weak ability against disturbances. The existing Z-source indirect matrix converters lead to non-full-silicon converters due to inserting Z-source networks in the dc-link, and the existing Z-source direct matrix converters require the complicated commutation. No matter what of conventional matrix converters, existing Z-source indirect matrix converters, or existing Z-source direct matrix converters, extra LC filter is necessary between the grid and matrix converter. The complex systems or limited functionbility of current matrix converters drag on the expansion of their practical applications in AC variable frequency drives. This project proposes a novel Quasi-Z-source indirect matrix converter, which is applied to AC variable frequency drives, through inserting the improved Quasi-Z-source network between the ac source and the rectifier stage, and the improved Quasi-Z-source network combines the boost function and filter function together, finally the special additional filter is eliminated. The proposed novel matrix converter, so-called LC-filter-integrated-in-Quasi-Z-source indirect matrix converter simplifies the whole system, and enhances the system functionability, for example, the voltage gain of matrix converter is extended, and these kinds of novel matrix converter-based ac drives have the ride-through ability against the grid voltage sag. We will carry out the wide and deep studies on the new topologies and new ac drives, and figure out the unknown intrinsic rules and key technologies. First, these kinds of new topologies are proposed, and the corresponding mathematic models are built. Secondly, we will propose the modulation methods, parameter design method for Quasi-Z source network, and control schemes for novel matrix converter and novel ac drives. All of theoretical findings are verified through using simulation results. Thirdly, the prototypes are set up to carry out broad experiments. The experimental results validate the proposed topologies, proposed parameter design method, and proposed modulation and control methods. The project works on the general fundamental of proposed topologies, modulation methods, and control methods, which will provide the important basis for the Z-source matrix converter's practical applications in AC variable frequency drives, also provide the theoretical fundamental and experimental verifications for Z-source matrix converter's industrialization.