Evaluation and Modeling of Cross Saturation Due to Leakage Flux in Vector-Controlled Induction Machines
Evaluation and Modeling 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/tia.2007.895741
复制
发表时间：
2007
影响因子：
4.4
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
一个详细的磁阻为基础的计算模型的感应电机，其中传统的转子磁场定向矢量控制方案已被嫁接，被用来检查饱和的主和漏磁通路径矢量控制的驱动性能的影响。个别机齿，绕组和导体被纳入，因为是伪三维建模的歪斜。因此，交叉饱和效应由电机的基本尺寸和绕组设计数据确定。然后，可以导出用于实际实施的有效补偿方法。直接转子磁通定向和幅值控制用于确保基于机器参数的矢量控制方案中的不准确性不会反映在交叉饱和的结果中。一个15千瓦的四极感应电动机转子倾斜一个定子槽间距的结果表明，倾斜漏磁是主要负责交叉饱和。的偏斜漏磁通严重饱和的机器的一端，并减少在其他的气隙磁通密度。在200%额定负载电流下，如果isd保持恒定，这相当于直轴磁通减少11%。为了弥补这一减少，政府间新闻司需要增加27
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-D modeling 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 four-pole induction motor with rotor skewed one 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 an 11% reduction in direct axis flux if isd is kept constant. To compensate for this reduction, a 27% increase in isd would be required