西南交通大学学 报 第 54 卷 第 5 期 2019 年 10 月 JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY Vol. 54 No. 5 Oct. 2019 ISSN: 0258-2724 DOI：10.35741/issn.0258-2724.54.5.11 Research article Electrical and Electronics Engineering CONTROL OF MATRIX CONVERTER FOR AC DRIVES BY PROPOSED INDIRECT SPACE VECTOR MODULATION ISVM STRATEGY Alyaa Muhsen, Ali Salam Al-Khayyat, Mustafa Jameel Hameed Department of Electrical and Electronics Engineering, University of Thi-Qar, Al-Nassiryah, Thi-Qar, Iraq alyaa-m@utq.edu.iq , ali-al-khayyat@utq.edu.iq Abstract Matrix Converter is considered as a forced commutated AC-to-AC converter, where an array of bidirectional controlled switches produces variable voltage and frequency. This paper presents a modulation approach to MC operation: a fictitious DC link control technique, which is also known as the Indirect Modulation method and is characterized by lack of reactive storage components in the DC link. This method allows the bidirectional power to flow between the source and load, and thus raise the voltage ratio above 86.6%, control the desired magnitude and frequency, and achieve nearly unity power factor at the input side of the converter. Keywords: AC-AC conversion, Indirect Matrix Converter, Space Vector Modulation, AC Drive Control. 摘要: 矩阵转换器被认为是强制换向的 AC-AC 转换器，其中双向受控开关的阵列产生可变的电压和频率。 本文提出了一种用于 MC 操作的调制方法：虚拟 DC 链接控制技术，也称为间接调制方法，其特征是 DC 链 接中缺少无功存储组件。 这种方法允许双向功率在电源和负载之间流动，从而将电压比提高到 86.6％以上 ，控制所需的幅度和频率，并在转换器的输入端实现几乎统一的功率因数。 关键词: AC-AC 转换，间接矩阵转换器，空间矢量调制，AC 驱动控制 I. INTRODUCTION In the applications of Electrical system, it is desired to control some parameters, such as voltage, current, speed and torque in order to meet particular requirements. In most power electronic applications, the conversion of voltage level is performed via a converter. AC-AC converter is used in many applications that required adjustable AC voltage and frequency. Rectifier and Inverter stage are used for performing AC-to-AC conversion, which is known as Voltage Source Inverter VSI. Where a rectifier converts AC to DC and an inverter converts DC to AC [1]. The disadvantage of that process is the distortion of input voltage, which is not friendly to sensitive equipment connected to the same supply. Furthermore, there are additional harmonic losses in the utility, a low power factor, and a significant ripple current which would put a stress on the DC link capacitor. Moreover, this kind of a rectifier does not allow reverse current during a regenerating braking particularly if the load is motor. The Matrix Converter MC is preferred in comparison with the Voltage Source Inverter VSI, where MC has bidirectional switches, which are modelled as a matrix array. It can generate a sinusoidal shape output and the drawn current is sine wave as well. One of the advantages of MC is that the input power factor does not depend on the output power factor [2], [3].