永磁无刷直流电动机系统集成分析模型

Bining Zheng, Zhen Zhang, T. Shi, Yanfei Cao, C. Xia
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引用次数: 0

摘要

本文采用场路耦合的方法,建立了永磁无刷直流电动机与逆变器耦合的解析模型。首先,根据无刷直流电机的调制方案和工作周期,分析了电机电源电压与直流链路电压之间的关系。然后,建立包含电机供电电压、电流和电机结构参数解析关系的全解矩阵,同时计算矢量电位和电流。从而准确地计算出输出转矩。该模型可以考虑电机的结构,如开槽、绕组的空间分布等,以及控制参数对电机性能的影响。将场路耦合时步有限元模型的仿真结果与实验结果进行比较,表明该模型具有计算电流和输出转矩精度高、速度快的特点。在此基础上,研究了极弧比、气隙长度、线圈匝数和引线角对无刷直流电机平均转矩和转矩电流比的影响,为无刷直流电机系统的快速优化设计提供了指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Integrated Analytical Model of Permanent Magnet Brushless DC Motors System
In this paper, an analytical model of permanent magnet brushless dc motors (BLDCM) coupled with inverter is proposed visa field-circuit coupled method. Firstly, the relationship between the motor supply voltage and the DC-link voltage is analyzed based on the modulation scheme and the operation period of BLDCM. Then, a total solution matrix containing the analytical relations of motor supply voltage, current and motor structure parameters is established to calculate the vector potentials and the currents simultaneously. As a result, the output torque is calculated accurately. The proposed model can consider the influence of the motor structure, such as slotting, spatial distribution of the windings, etc, and control parameters on the motor performance. Compared with the simulation results of the field-circuit coupled time-stepping finite element model and experimental results, the proposed model is with high accuracy and rapidity for the current and output torque calculation. Furthermore, based on the proposed model, the effects of the pole arc ratio, air-gap length, coil turns and lead angle on the average torque and torque-current ratio are researched, which can provide the guidance for the fast optimal design of the BLDCM system.
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