An Investigation of a Control Method for Fault-Mode Inverters to Drive Induction Motors
An Investigation of a Control Method for Fault-Mode Inverters to Drive Induction Motors
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故障模式逆变器驱动感应电机的控制方法研究
DOI：
10.1541/ieejias.123.1430
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发表时间：
2003
影响因子：
--
通讯作者：
Yukihiko Sato
中科院分区：
文献类型：
--
作者：
M. Yamato;Yukihiko Sato
本文提出了一种三相电压源逆变器驱动交流电机的故障模式控制方法。所提出的方法不需要任何额外的开关装置和带有中性点外部端子的特殊构造的电动机。因此，这种方法可以很容易地应用于传统的三相电压源逆变器。当逆变器的一条腿因开关设备故障而丢失时，开关设备的导通信号被移除。然后，将电机的对应相位连接到直流链路的中性点上，由两个串联的直流平滑电容器分开。在这种情况下，逆变器其余两相的开关器件可以施加正弦线对线电压，以在电动机中产生三相平衡电流。为了实现该方法，必须开发一种补偿直流中性点电压波动的方法。实验结果表明，所提出的控制策略对故障型三相电压源逆变器的控制是有效的。
In this paper, a control method in fault-mode for three-phase voltage source inverters to drive AC motors is proposed. The proposed method does not require any additional switching devices and specially constructed motors with an external terminal of the neutral point. Thus, this method can be easily applied to conventional three-phase voltage source inverters. When the one leg of the inverters is lost by a trouble in the switching devices, the turn-on signals for the switching devices are removed. Then, the corresponding phase of the motor is connected to the neutral point of the DC link divided by the two series-connected DC smoothing capacitors. In this connection, the switching devices in the remaining two phases of the inverter can apply sinusoidal line-to-line voltage to produce the three-phase balanced currentin the motor. To realize the proposed method, a method to compensate the voltage fluctuation of the DC neutral point must be developed. The effectiveness of the proposed control strategy for the fault-mode three-phase voltage source inverters has been confirmed by the experimental results employing a test system.