高速永磁电机铁耗的计算与分析

发布时间：2019-05-11 18:32

【摘要】：高速永磁电机具有结构简单、效率高、可靠性高等优点，在许多场合可以取消机械调速装置，提高系统效率和功率密度，，在分布式发电独立电站、机械储能装置、高速驱动等领域得到广泛应用，具有良好的应用前景。由于高速永磁电机的工作频率远高于传统电机，其产生的定子铁芯损耗也远高于传统电机，所以高速永磁电机温升也不同于传统电机，准确计算高速永磁电机的损耗，合理设计通风散热对于高速电机的设计尤为重要。本文分析了几种高速电机的铁耗计算方法，通过对一台样机铁耗计算的对比分析，比较了各个方法的适用性。首先，总结和详细介绍了电机铁耗的多种计算模型。从电机种类上来说，既有传统电机的铁耗的计算模型，也有高速电机的铁耗计算模型。从电源波形上来说，既有正弦波下铁耗的计算模型，也有任意波形下铁耗的计算模型。从磁化条件上来说，既有单独考虑交变磁化时的铁耗计算模型，也有同时考虑交变、旋转磁化条件时的铁耗计算模型。其次，详细介绍了电磁场有限元计算的原理，有限元分析通过将对偏微分方程的求解转换为对代数方程的求解，从而简化了计算过程，给出了有限元法分析电磁场的计算过程，并总结了有限元分析法的步骤。最后，对一台高速永磁发电机建立了有限元模型，仿真分析了电机内部磁场和电机的性能。用传统理论定子铁耗计算模型和Bertitto分离铁耗计算模型对一台高速永磁发电机的铁芯损耗进行了计算，并与实际测量和有限元计算值进行了对比。根据计算误差分析了这两种计算模型的适用性。
[Abstract]:High speed permanent magnet motor has many advantages, such as simple structure, high efficiency, high reliability and so on. In many cases, mechanical speed regulating device can be eliminated, system efficiency and power density can be improved, in distributed power generation independent power station, mechanical energy storage device. High speed drive and other fields have been widely used and have a good application prospect. Because the working frequency of high speed permanent magnet motor is much higher than that of traditional motor, and the loss of stator core produced by high speed permanent magnet motor is much higher than that of traditional motor, the temperature rise of high speed permanent magnet motor is also different from that of traditional motor, and the loss of high speed permanent magnet motor is calculated accurately. Reasonable design of ventilation and heat dissipation is particularly important for the design of high-speed motor. In this paper, several calculation methods of iron consumption of high-speed motor are analyzed, and the applicability of each method is compared by comparing and analyzing the calculation of iron consumption of a prototype machine. First of all, a variety of calculation models of motor iron consumption are summarized and introduced in detail. As far as the type of motor is concerned, there are not only the calculation model of the iron consumption of the traditional motor, but also the calculation model of the iron consumption of the high-speed motor. As far as the waveform of power supply is concerned, there is not only the calculation model of iron consumption under sine wave, but also the calculation model of iron consumption under arbitrary waveform. In terms of magnetization, there are not only the calculation model of iron consumption considering alternating magnetization alone, but also the calculation model of iron consumption when alternating magnetization and rotating magnetization are considered at the same time. Secondly, the principle of finite element calculation of electromagnetic field is introduced in detail. The finite element analysis simplifies the calculation process by transforming the solution of partial differential equation into the solution of algebra equation, and gives the calculation process of finite element analysis of electromagnetic field. The steps of finite element analysis are summarized. Finally, the finite element model of a high-speed permanent magnet generator is established, and the internal magnetic field and the performance of the motor are simulated and analyzed. The core loss of a high speed permanent magnet generator is calculated by using the traditional theoretical stator iron loss calculation model and Bertitto separation iron consumption calculation model, and compared with the actual measurement and finite element calculation values. The applicability of the two models is analyzed according to the calculation error.
【学位授予单位】：中国舰船研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM351

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