排序方式: 共有58条查询结果,搜索用时 271 毫秒
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基于数字信号处理器的直接转矩控制技术的实现 总被引:1,自引:1,他引:0
文章介绍了三项异步电动机直接转矩控制技术中一些关键模块的新型实现方法,其中详细叙述了一种根据电压区段空间几何特性估计定子磁链位置的新方法,还介绍了一些简化计算的方法。该方法在基于TITMS320F240数字信号处理器的实验系统上得到实现,实验结果表明,该方法简化了运算,控制效果良好。 相似文献
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基于粗糙集理论的中长期风速预测 总被引:5,自引:0,他引:5
在中长期风速预测中,正确处理相关因素的影响是提高风速预测精度的关键。该文提出一种粗糙集理论预测方法。利用粗糙集理论分析出风速预测的主要影响因素,将其作为中长期风速预测模型的附加输入,建立粗糙集神经网络预测模型。利用黑龙江某风电场的数据进行训练和预测,并将预测结果与单纯的混沌神经网络预测方法和持续模型方法进行对比,结果表明,粗糙集神经网络模型的预测精度最高。粗糙集方法在中长期风速预测中将是一个有用的工具。 相似文献
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SOOMRO Amir Mahmoo KHAHRO Shahnawaz Farhan SYED Feroz Shah 廖晓钟 FARHAN Manzoor 《北京理工大学学报(英文版)》2013,22(4):504-508
The multiphase boost DC-DC converter with stable control strategy is presented. Multi- phase boost DC-DC converter is designed for high voltage and high power applications, and could be achieved by the adjustment of voltage doubler rectifiers on the secondary side of high frequency transformers. The stable control strategy for three phase boost DC-DC converter has been utilized during simulation in this study and this strategy can be extend to N-number of phases. The stable control strategy consists of only three voltage loops, which are sufficient for appropriate and efficient operation of three phase boost DC-DC converter. With the stable control strategy, the equal power balance sharing can be obtained between input and output. The stability of control strategy has been evaluated by simulating the multiphase boost DC-DC converter for the same and mismatch turn ratios of high frequency transformers. The simulation result is good and the objective of the strategy is a- chieved. 相似文献
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