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Series Z-source and nine-switch dual-output inverter stage two-stage matrix converter

机译：系列Z源和九开关双输出逆变器级两级矩阵转换器

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摘要

Nine-switch dual-output inverter stage two-stage matrix converter (NS-TSMC) has been widely applied in dual AC motors drive system, while it has the shortcoming of low voltage transfer ratio. Based on the NS-TSMC, a modified topology, named as series Z-source and nine-switch dual-output inverter stage two-stage matrix converter (ZS-NS-TSMC), is proposed, in which the series Z-source network is connected between the rectifier stage and nine-switch dual-output inverter stage (NS-DOI). In the presented topology, a brief shoot-through vector is employed, which can improve the voltage transfer ratio. Other advantages of the series Z-source network, such as low voltage stress of Z-source capacitor, zero dead-time of NS-DOI and limiting inrush current at startup, are discussed in the study. Furthermore, the dual space vector modulation is presented, which can achieve the merits of unity input power factor, sinusoidal input and outputs. Besides, the sinusoidal outputs, the capability of boosting voltage and adjustable output voltage amplitude are also discussed by the mathematical proof. Finally, an experimental prototype is set up based on the controllers of TMS320F28069 (DSP) and EPM570 (CPLD), the results of which verify the feasibility and desired advantages of the proposed topology and modulation strategy.
机译：九开关双输出逆变器级两级矩阵变换器（NS-TSMC）已被广泛应用于双交流电动机驱动系统中，但它具有低电压传输比的缺点。基于NS-TSMC，提出了一种改进的拓扑结构，称为串联Z源和九开关双输出逆变器级两级矩阵转换器（ZS-NS-TSMC），其中串联了Z源网络在整流器级和九开关双输出逆变器级（NS-DOI）之间连接。在提出的拓扑中，采用了简短的直通矢量，可以提高电压传输比。研究中还讨论了串联Z源网络的其他优点，例如Z源电容器的低电压应力，NS-DOI的零死区时间以及启动时限制浪涌电流。此外，提出了双空间矢量调制，可以实现单位输入功率因数，正弦输入和输出的优点。此外，还通过数学证明讨论了正弦输出，升压能力和可调输出电压幅度。最后，基于TMS320F28069（DSP）和EPM570（CPLD）控制器建立了实验原型，其结果验证了所提出的拓扑和调制策略的可行性和所需的优势。

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