共查询到19条相似文献,搜索用时 46 毫秒
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开关磁阻电机的优化设计 总被引:6,自引:0,他引:6
全面研究了开关磁阻电机的优化设计问题,首次提出开通角系数和关断角系数的概念,有效地处理了优化设计过程中的控制参数问题,讨论了优化点及恒功率区特点在优化过程中的处理方法。 相似文献
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开关磁阻电动机开关角的在线最优控制 总被引:3,自引:1,他引:2
针对传统的开关磁阻电动机角度位置控制只是离线计算合适的开通关断角,或随着负载、转速的变化线性地改变开通关断角,提出了在稳态时使驱动系统的性能指标转矩/安培最优的开通关断角在线控制方案,详细了一种利用EPROM实现开关角控制的方法,给出了一些实验结果,证实了该在线调整方法的必要性和有效性。 相似文献
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损耗计算是研究电机效率的基础,本文讨论了开关磁阻电机铜耗、铁耗、机械损耗和杂散损耗的计算方法,给出了适于解析计算的各种损耗计算公式,为设计开关磁阻电机时估算效率提供了条件。 相似文献
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针对开关磁阻电机存在磁场严重的非线性且数学模型不精确等问题,提出了一种滑模变结构控制方法。它主要是通过切换函数从而不间断地来回切换系统量,系统总约束在切换面上,然后系统的状态变量自动地滑到原点。利用滑模变结构控制的快速性和完全自适应性,设计了滑模变结构控制的开关磁阻电机调速系统,同时推导出了该方法的数学模型,最后编程实现并在实验台上调试。实验结果证明,与常规的控制策略相比,滑模变结构控制改善了系统的动态性能,有较强的鲁棒性,且在无需知道电机精确模型的情况下可有效克服转矩脉动。 相似文献
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开关磁阻电动机控制方法研究 总被引:1,自引:0,他引:1
简要介绍了开关磁阻电动机的特点,详细介绍和分析了开关磁阻电动机的各种控制方法,分析了各种控制方法的原理、优缺点和适用范围,重点分析了直接转矩控制方法。 相似文献
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针对开关磁阻电机再生制动控制中存在制动电流波动大的问题,提出一种基于电流预测的开关磁阻电机再生制动控制方法.分析了电机制动过程中其对应功率开关的工作模式及相应状态向量的确定方法,研究了基于电流预测的开关磁阻电机再生制动控制的具体设计方法,并对其效果进行了仿真验证,同时与传统变制动相电压占空比控制法进行了对比仿真分析,结... 相似文献
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Fuzzy logic control of a switched reluctance motor drive 总被引:2,自引:0,他引:2
The paper deals with the fuzzy logic control of a switched reluctance motor (SRM) drive. The fundamentals of the fuzzy logic are first illustrated, pointing out the aspects related to the control under consideration. A fuzzy logic controller (FLC) of the motor speed is then designed and simulated. The results show that the use of an FLC in the speed loop gives the drive superior performances. In particular, the robustness of the drive has been proved 相似文献
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针对简化磁链法开通角和关断角无法灵活且精确控制的问题,限制SRM(swithed reluctance motor)效率和高速运行性能,根据不同转速,提出实时调整开关角的无位置检测控制策略,通过建立电机有限元仿真模型,计算得到样机不同转子位置磁链模型.为提高角度位置控制精确度,针对SRM磁链模型的特点,给出参考磁链选取原则,在此基础上,根据不同转速实时调整开关角,实现SRM变角度位置控制.为验证提出的无位置控制策略的有效性,分别选取低速和高速样机进行试验.结果表明,提出的无位置检测法适用于低速和高速SRM,具有较高位置估算精确度. 相似文献
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Han-Kyung Bae Byeong-Seok Lee Vijayraghavan P. Krishnan R. 《Industry Applications, IEEE Transactions on》2000,36(5):1351-1359
The converter topology with a minimum number of power devices and control implementations to facilitate the pulsation-free force control of the linear switched reluctance machines are investigated for the first time in this paper. The minimization of the devices offers cost reduction, compact packaging, and enhanced overall reliability. With that in view, a topology with 3Nsc+3 devices is chosen where Nsc is the number of sectors in the linear machine. The propulsion force with conventional control of single-phase excitation has high-commutation torque pulsation and it is overcome with a multiphase excitation strategy, proposed in this paper. Further, the proposed control strategy reduces the normal force pulsation. A systematic step-by-step design procedure of the switching strategy for the converter known as unipolar switching strategy, proportional plus integral current controller, and gating control strategy of a long linear switched reluctance machine is presented. Experimental correlation of the proposed converter arrangement and control strategy is presented with a 4.8 m-long linear switched reluctance machine in achieving the stated objectives 相似文献
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Hossain S.A. Husain I. Klode H. Lequesne B. Omekanda A.M. Gopalakrishnan S. 《Industry Applications, IEEE Transactions on》2003,39(5):1343-1349
A four-quadrant sensorless controller for switched reluctance motor (SRM) drives is presented in this paper. The drive system with appropriate turn-on and turn-off angles for each operating quadrant delivers excellent dynamic performance over a wide speed range including zero speed. The problems associated with practical implementation especially at low and zero speeds have been addressed and overcome with engineering solutions. Experimental results for a 1-kW SRM obtained on a dSPACE-based system are presented along with useful guidelines for practical implementation. 相似文献