开关磁阻电机的结构优化设计研究

发布时间：2018-05-13 11:36

本文选题：开关磁阻电机 + 有限元分析　；参考：《河北工程大学》2014年硕士论文

【摘要】：开关磁阻电机作为一种新型的调速系统，在电机领域具有明显优势，如结构简单坚固，系统稳定，调速范围广等。但由于其定转子呈双凸极结构，使得该电机的电磁转矩具有周期脉动性，由此导致了磁场具有饱和特性及非线性，在SR电机运行时会产生较大的振动和噪声，这也成为制约该电机发展和应用的一个重要因素。长久以来，如何更好地抑制电机的转矩脉动和振动一直是研究的焦点所在。本文针对开关磁阻电机转矩脉动较大的特点，通过改进电机本体结构，，以达到优化电机性能的目的。首先，对开关磁阻电机的基本方程以及三种数学模型进行了详细阐述，同时对各种模型下的电感、绕组电流及转矩在不同阶段的变化情况进行了研究。其次，依据电机的电磁设计及性能参数设计的原则，对开关磁阻电机进行预设计。运用ANSOFT软件对样机进行了电磁场有限元分析与瞬态仿真，在此基础上对电机转子采用斜槽结构，并将斜槽前后电机的静态特性进行了对比分析，分析可知，转子斜槽结构可有效改善电机性能且对转矩脉动削弱作用明显。将不动点理论引入遗传算法，并采用基于不动点理论的改进遗传算法对转子斜槽结构的开关磁阻电机进行优化，并建立了多目标优化模型，最终得到了优化问题的近似最优解集，同时验证了该算法的可行性和有效性，为电机优化设计提供了一种通用方案。
[Abstract]:As a new type of speed regulation system, switched reluctance motor (SRM) has obvious advantages in the field of motor, such as simple structure, stable system, wide speed range and so on. However, because of the doubly salient structure of stator and rotor, the electromagnetic torque of the motor has periodic pulsation, which leads to the saturation and nonlinearity of the magnetic field, which will produce large vibration and noise when the SR motor is running. This also becomes an important factor that restricts the development and application of the motor. For a long time, how to better restrain torque ripple and vibration of motor has been the focus of research. In view of the large torque ripple of switched reluctance motor (SRM), the structure of SRM is improved in order to optimize the performance of SRM. Firstly, the basic equations and three mathematical models of switched reluctance motor (SRM) are described in detail. At the same time, the variations of inductance, winding current and torque in different stages are studied. Secondly, according to the principle of electromagnetic design and performance parameter design, the switched reluctance motor is predesigned. The electromagnetic field finite element analysis and transient simulation of the prototype were carried out by using ANSOFT software. On this basis, the rotor of the motor was constructed with slant slot structure, and the static characteristics of the motor before and after the slant slot were compared and analyzed. Rotor slotting structure can effectively improve motor performance and weaken torque ripple obviously. The fixed point theory is introduced into genetic algorithm, and an improved genetic algorithm based on fixed point theory is used to optimize the switched reluctance motor with rotor slant structure, and a multi-objective optimization model is established. Finally, the approximate optimal solution set of the optimization problem is obtained, and the feasibility and effectiveness of the algorithm are verified, which provides a general scheme for the optimal design of the motor.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM352

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