开放式绕组感应电机驱动的18面多边形电压空间矢量多电平逆变器

S. Lakshminarayanan, G. Mondal, K. Gopakumar
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引用次数: 8

摘要

针对开放式绕组结构的异步电机驱动器,提出了一种简单的18面多边形电压空间矢量结构的多电平逆变器方案。电机从一端用传统的两电平逆变器馈入,另一端用三电平逆变器馈入,通过级联两个传统的两电平逆变器实现。逆变器以不对称直流链路电压供电。提出了一种简单的线性PWM控制方案,最高可达18步模式,仅基于电机参考相位幅值。该方案不像传统的六边形电压空间矢量结构的PWM方案那样,在过调制区域需要复杂的信号处理和控制回路。与任何传统方案相比,该方案在消除5阶、7阶、11阶和13阶谐波的同时增加了调制范围。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multilevel Inverter with 18-sided Polygonal Voltage Space Vector for an Open-end Winding Induction Motor Drive
A simple multilevel inverter scheme with 18-sided polygonal voltage space vector structure is proposed for an induction motor drive with an open-end winding configuration. The motor is fed from one end with a conventional two-level inverter and from the other end with a three level inverter, realised by cascading two conventional two-level inverters. The inverters are fed with asymmetrical DC link voltages. A simple linear PWM control scheme up to 18-step mode is proposed, based only on the motor reference phase amplitudes. The present scheme does not require complicated signal processing and control loop, as in the case of PWM scheme with conventional hexagonal voltage space vector structure, in over modulation regions. The proposed scheme gives and increased modulation range with the elimination of 5th 7th 11th and 13th order harmonics, when compared to any conventional schemes.
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