Evaluation and modelling of cross saturation due to leakage flux in vector controlled induction machines
Evaluation and modelling of cross saturation due to leakage flux in vector controlled induction machines
复制标题
矢量控制感应电机中漏磁通引起的交叉饱和的评估和建模
DOI：
10.1109/iemdc.2003.1210723
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
P. Sewell
中科院分区：
文献类型：
--
作者：
C. Gerada;K. Bradley;M. Sumner;P. Sewell
本文建立了一种基于磁阻的感应电机计算模型，在此模型中加入了传统的、面向转子磁通的矢量控制方案，研究了主磁通路径和漏磁通路径的饱和对矢量控制驱动性能的影响。单独的机器齿，绕组和导体被纳入，因为是伪三维模型的倾斜。因此，交叉饱和效应是由机器的基本尺寸和绕组设计数据决定的。然后可以推导出实际实施的有效补偿方法。直接，转子磁链方向和大小控制用于确保不准确的机器参数为基础的矢量控制方案不反映在交叉饱和的结果。对转子偏斜1定子槽距的15kw 4极感应电动机的结果表明，偏斜漏磁是交叉饱和的主要原因。斜漏磁通会使机器一端严重饱和，而另一端则会降低气隙磁通密度。在200%额定负载电流下，如果i/sub / d/保持不变，这相当于直接轴磁通减少20%。为了弥补这一减少，需要增加40%的i/sub / d/。
A detailed magnetic, reluctance based, computational model of an induction machine into which a traditional, rotor-flux-orientated, vector, control-scheme has been grafted, is used to examine the influence of saturation of both main and leakage flux paths upon vector controlled drive performance. Individual machine teeth, windings and conductors are incorporated, as is pseudo 3 dimensional modelling of skew. The cross saturation effect is therefore determined from the basic dimensional, and winding, design data of the machine. Effective compensation methods can then be derived for practical implementation. Direct, rotor flux orientation and magnitude control is used to ensure that inaccuracies in a machine parameter based vector control scheme are not reflected in the results for cross saturation. Results for a 15 kW, 4 pole induction motor with rotor skewed 1 stator slot pitch show that skew leakage flux is predominantly responsible for cross saturation. The skew leakage flux is shown to heavily saturate one end of the machine and to reduce the air gap flux density at the other. At 200% rated load current this equates to a 20% reduction in direct axis flux if i/sub d/ is kept constant. To compensate for this reduction a 40% increase in i/sub d/ would be required.