Multi‐phase converters for more than three‐phase applications have become increasingly important topics due to their distinct advantages compared with the conventional three‐phase converters. This paper proposes a modified PWM switching technique for direct AC‐AC three‐to‐five phase matrix converter to realize output voltage waveform with low total harmonic distortion (THD) and reduce the total commutation number of its bidirectional power switches in each control period, simultaneously. In order to minimize the switching loss and reduce the voltage stress on all power switches of the matrix converter, the proposed PWM switching pattern prevents any state of direct commutation and switching between the maximum and minimum grid phase voltages. This in‐turn enhances the converter durability and lifetime in addition to the power density. Also, the proposed PWM switching technique has the ability to fully control the load voltage waveform and its frequency to meet the reference values. In addition, it has the ability to control the three‐phase grid currents to be sinusoidal waveforms and in‐phase with grid voltages for unity power factor. Moreover, it enables voltage transfer ratio of 78.86% of the source input voltage. A laboratory prototype has been carried out in order to investigate the effectiveness of the proposed switching technique.

中文翻译：

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适用于三到五相矩阵转换器的简单PWM技术

与传统的三相转换器相比，用于三相以上应用的多相转换器具有越来越多的优势，因此已成为越来越重要的话题。本文针对直接AC‐AC三到五相矩阵转换器提出了一种改进的PWM开关技术，以实现低总谐波失真（THD）的输出电压波形并减少每个控制周期中其双向功率开关的总换向次数，同时地。为了最小化开关损耗并降低矩阵转换器所有电源开关上的电压应力，建议的PWM开关模式可防止任何直接换向和最大与最小电网相电压之间切换的状态。这又提高了转换器的耐用性和使用寿命，并提高了功率密度。还，提出的PWM开关技术具有完全控制负载电压波形及其频率以满足参考值的能力。此外，它还具有将三相电网电流控制为正弦波形并与电网电压同相的能力，以实现单位功率因数。此外，它可以实现源输入电压的78.86％的电压传输比。为了研究所提出的开关技术的有效性，已经进行了实验室原型设计。源输入电压的86％。为了研究所提出的开关技术的有效性，已经进行了实验室原型设计。源输入电压的86％。为了研究所提出的开关技术的有效性，已经进行了实验室原型设计。