摘要：In this paper,a new hybrid excited doubly salient stator-permanent-magnet motor is proposed,where both permanent magnets and DC field windings are located in the *** theory,the mathematical model and design method of the motor are *** corresponding output power equation and the relationship between the flux control capability and the extended speed range are deduced in *** using an efficient "one-step" three-dimensional(3D) finite element method,the electromagnetic performances are analyzed,in which the leakage flux outside the stator circumference and end-effect are taken into *** on the operation principle of the motor,the control strategy and scheme are developed and implemented *** experimental results and finite element analysis show that the proposed motor not only maintains the advantages of doubly salient permanent magnet motors,but also offers high energy efficiency over a wide speed range,which makes the motor an interesting candidate for electric vehicles.

摘要：Multiscale simulation is a key research tool in the quest for new permanent *** with first principles methods,a sequence of simulation methods can be applied to calculate the maximum possible coercive field and expected energy density product of a magnet made from a novel magnetic material ***(Fe)-rich magnetic phases suitable for permanent magnets can be found by means of adaptive genetic *** intrinsic properties computed by ab initio simulations are used as input for micromagnetic simulations of the hysteresis properties of permanent magnets with a realistic *** machine learning techniques,the magnet’s structure can be optimized so that the upper limits for coercivity and energy density product for a given phase can be *** property relations of synthetic permanent magnets were computed for several candidate hard magnetic *** following pairs(coercive field(T),energy density product(kJ·m^-3))were obtained for iron-tin-antimony(Fe3Sn0.75Sb0.25):(0.49,290),L10-ordered iron-nickel(L10 FeNi):(1,400),cobalt-iron-tantalum(CoFe6Ta):(0.87,425),and manganese-aluminum(MnAl):(0.53,80).

摘要：A novel digital implementation of speed controller for a permanent Magnet Synchronous Motor (PMSM) with disturbance rejection using conventional observer combined with Extended Kalman Filter (EKF) is proposed. First, the EKF is constructed to achieve a precise estimation of the speed and current from the noisy measurement. Second, a proportional integral derivative (PID) controller is developed based on Linear Quadratic Regulator (LQR) to achieve speed command tracking performance. Then, an observer is designed and its error is utilized to provide load disturbance compensation. The proposed method greatly enhances the PMSM performance by reducing the control signal variation as well as the disturbance. The speed control performance is significantly improved compared to the case when we have an observer acting alone. The simulation results for the speed response and variation of the states when the PMSM is subjected to the load disturbance are presented. The results verify the effectiveness of the proposed method.

摘要：The structure and working principle of a kind of permanent-magnet adsorption tracked wall-climbing ro-bot used in ship was analyzed in this paper. The robot can complete vertical climbing wall function when perma-nent-magnet adsorption tracked was driven by ac servo motor. In order to improve the load capacity and obstaclesurmounting ability of robot, a new permanent-magnet auxiliary caster adsorption mechanism and driven wheelfloating mechanism were used for the design of structure. In thispaper, the mechanical state of the permanent-mag-netic adsorption tracked climbing mechanism was analyzed. Through the magnetic simulation and experimental a-nalysis of magnetic adsorption system, the adsorption unit structure and electric drive system parameters of thepermanent-magnet tracked wall-climbing robot were reasonably designed.

摘要：基于Maxwell2D的仿真环境,建立了开关磁通永磁同步电动机（SFPM）的系统模型。在建立仿真模型的基础上,对SFPM电动机基本特性进行了仿真研究,获得了电动机在不同位置时的磁场分布、静态电磁参数和动态性能仿真结果。仿真结果可以用于指导该型电动机及其控制系统的设计和优化。

摘要：为提高永磁同步电动机(permanent magnet synchronous motor,PMSM)调速系统动态性能,基于睾丸性激素反馈调节原理,设计了一种基于生物智能控制算法的控制器,该控制器为双层结构,包含一级控制器和二级控制器。一级控制器采用PI控制,快速消除二级控制器输入端的控制偏差;二级控制器采用滑模控制(sliding mode control,SMC),增强系统的抗扰动能力。Matlab/Simulink仿真结果表明,基于生物智能控制算法的新型控制器较传统PI控制器和滑模控制器响应速度快、超调量小、稳定性好。

摘要：从20世纪60年代起,终身体育逐渐收到了广大体育工作者的关注,终身体育和终身教育的关系也成为一个争论不休的话题,直到今天,仍没有统一结论。本文,笔者从另外一种角度出发,阐述了终生体育和终身教育的关系问题,以期对同行有所参考。一、终身教育教育应贯穿于人生的始末,人的一生都应该接受教育的思想在20世纪曾风行于许多国家,且在很长的历史时期以来成了一个热门话题。日本的《生涯教育字典》。