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首页> 外文期刊>Power Electronics, IET >Two-level three-phase voltage source inverter fed low-power AC induction motor based on unipolar pulse-width modulation method
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Two-level three-phase voltage source inverter fed low-power AC induction motor based on unipolar pulse-width modulation method

机译：基于单极脉宽调制方法的两电平三相电压源逆变器馈电小功率交流感应电动机

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摘要

Space vector modulation is a well-established theory. Generally, a three-phase voltage source inverter generates eight switching states, including six active and two zero states, by the bipolar method. This study proposes a novel way to synthesise the output voltage vector by turning off both switches in a leg. Accordingly, new leg switching states are defined. A unipolar method is used to achieve discontinuous pulse-width modulation. The complex reference vector is located by one active vector and two newly defined leg switching states. The most notable features of the proposed method are that it completely overcomes the problem of dead time without current polarity detection. These features make it very attractive for low-cost, low-power constant volts per hertz (V/f), open-loop, three-phase AC induction motor applications.
机译：空间矢量调制是一种公认​​的理论。通常，三相电压源逆变器通过双极方法产生八个开关状态，包括六个活动状态和两个零状态。这项研究提出了一种新颖的方法，即通过关断一条腿的两个开关来合成输出电压矢量。因此，定义了新的支路切换状态。单极性方法用于实现不连续的脉冲宽度调制。复数参考向量位于一个有效向量和两个新定义的支路切换状态之间。所提出的方法的最显着特征是，它完全克服了无电流极性检测的空载时间问题。这些功能使其非常适合低成本，低功率恒定频率每赫兹（V / f），开环，三相交流感应电动机的应用。

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