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首页> 外文期刊>Power Electronics, IET >Reduced switching loss pulse width modulation technique for three-level diode clamped inverter
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Reduced switching loss pulse width modulation technique for three-level diode clamped inverter

机译：三电平二极管钳位逆变器的降低开关损耗脉冲宽度调制技术

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摘要

Multilevel inverters are used to reduce the harmonics and to achieve high-voltage, high-power capability but switching losses are increased because of increased device count. Switching losses can be reduced by either soft switching techniques or by modifying modulation technique employing space vector-based PWM techniques or sinusoidal PWM-based techniques. In this study, a carrier-based closed-loop control technique has been developed to reduce the switching losses based on insertion of `no switching?? zone within each half cycle of fundamental wave. It effectively reduces the switching losses of three-level inverter without need of any complex mathematical expressions as involved in space vector-based techniques. An improvement of about 5% in efficiency for a switching frequency of 5 kHz is observed with proposed technique over conventional SPWM technique based on efficiency improvement factor (EIF). Simulation and experimental results are presented to validate the proposed technique
机译：多电平逆变器用于减少谐波并实现高电压，高功率能力，但由于设备数量增加，开关损耗也增加了。可以通过软开关技术或通过使用基于空间矢量的PWM技术或基于正弦PWM的技术修改调制技术来降低开关损耗。在这项研究中，基于载波的闭环控制技术已经被开发出来，以减少基于“无开关”插入的开关损耗。每个基波半周期内的区域。它有效地降低了三电平逆变器的开关损耗，而无需使用基于空间矢量的技术中涉及的任何复杂的数学表达式。与基于效率改进因子（EIF）的常规SPWM技术相比，所提出的技术对5 kHz开关频率的效率提高了约5％。仿真和实验结果被提出来验证所提出的技术

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