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首页> 外文期刊>IEEE Transactions on Energy Conversion >A Discontinuous PWM Method for Balancing the Neutral Point Voltage in Three-Level Inverter-Fed Variable Frequency Drives
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A Discontinuous PWM Method for Balancing the Neutral Point Voltage in Three-Level Inverter-Fed Variable Frequency Drives

机译:三相PWM变频驱动器中点电压的不连续PWM方法

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摘要

The paper describes a new discontinuous carrier-based pulsewidth modulation (PWM) method for use in variable frequency drives (VFD) driven by three-level inverters. The method introduces three different switching patterns for the full range of operating speeds. Depending on the actual operating speed, the proposed algorithm is developed to select the most suitable PWM switching pattern that improves the VFD performance. This results in low imbalance in the dc-link capacitor voltage, and low current distortions without increasing switching losses. Theory, simulation, and experimental results are presented.
机译:本文介绍了一种新的基于不连续载波的脉宽调制(PWM)方法,该方法用于由三级逆变器驱动的变频驱动器(VFD)中。该方法针对整个运行速度范围引入了三种不同的开关模式。根据实际的运行速度,开发了建议的算法以选择最合适的PWM开关模式,从而改善VFD性能。这导致直流链路电容器电压的不平衡度较低,电流畸变较小,而不会增加开关损耗。介绍了理论,仿真和实验结果。

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