基于双边界圆限定策略的感应电机预测控制研究

发布时间：2018-05-30 21:30

本文选题：逆变器 + 感应电机　；参考：《中国电机工程学报》2017年01期

【摘要】：为了减小交流电机驱动系统的开关损耗,需要尽可能降低逆变器的开关频率。预测控制是一种可以有效降低逆变器开关频率的新方法,近年来逐步成为学界的研究热点。基于单边界圆电流谐波限定策略的预测控制虽然可以降低逆变器开关频率,但当电流矢量位于边界圆内部时,该策略不断预测新的电压矢量,并替换原有的电压矢量,这很容易造成开关状态过早切换。因此,提出双边界圆限定策略:设定用于判断电流矢量位置的两个边界圆,当电流矢量处于内边界圆内部时,保持当前的电压矢量不变,从而避免开关状态过早切换,可以进一步降低开关频率。该文以仿真验证了双边界圆策略的可行性,通过实验测试了基于双边界圆限定策略的感应电机闭环调速系统控制性能,并对两种电流谐波限定策略在降低开关频率方面的效果进行了实验对比。实验结果显示,双边界圆限定策略可以实现感应电机的闭环调速,且能够将开关频率控制在0.6~1.6k Hz,比采用单边界圆策略时降低了1k Hz。
[Abstract]:In order to reduce the switching loss of the AC motor drive system, it is necessary to reduce the switching frequency of the inverter as much as possible. Predictive control is a new method that can effectively reduce the switching frequency of the inverter. In recent years, it has gradually become a hot topic in the research field. The predictive control based on the single boundary circular current harmonic restriction strategy can reduce the inverter. When the current vector is located in the boundary circle, the strategy constantly predicts the new voltage vector and replace the original voltage vector, which easily causes the switching state to switch early. Therefore, a double boundary circle restriction strategy is proposed to determine the two boundary circles of the current vector position, when the current vector is within the inner boundary circle. When the current voltage vector is kept constant, the switching state can be avoided and the switching frequency can be avoided. The feasibility of the double boundary circle strategy is verified by simulation, and the control performance of the closed-loop speed regulation system based on the double boundary circle restriction strategy is tested and two current harmonic constraints are defined. The experimental results show that the double boundary circle limiting strategy can realize the closed-loop speed regulation of the induction motor and control the switching frequency to 0.6~1.6k Hz, which reduces the 1K Hz. compared to the single boundary circle strategy.
【作者单位】：北京科技大学机械工程学院;
【基金】：国家自然科学基金项目(51407007) 中央高校基本科研业务费专项资金资助项目(FRF-TP-15-021A3) 北京市重点学科建设项目(HK100080429)~~
【分类号】：TM464;TM346

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