Purpose

The purpose of this paper is to investigate an alternative simplified analytical approach for the design of electric machines. Numerical-based finite element method (FEM) is a powerful tool for accurate modelling and electromagnetic performance analysis of electric machines. However, computational complexity, magnetic saturation, complex stator structure and time consumption compel researchers to adopt alternate analytical model for initial design of electric machine especially flux switching machines (FSMs).

Design/methodology/approach

In this paper, simplified lumped parameter magnetic equivalent circuit (LPMEC) model is presented for newly developed segmented PM consequent pole flux switching machine (SPMCPFSM). LPMEC model accounts influence of all machine parts for quarter of machine which helps to reduce computational complexity, computational time and drive storage without affecting overall accuracy. Furthermore, inductance calculation is performed in the rotor and stator frame of reference for accurate estimation of the self-inductance, mutual inductance and dq-axis inductance profile using park transformation.

Findings

The developed LPMEC model is validated with corresponding FEA using JMAG Commercial FEA Package v. 18.1 which shows good agreement with accuracy of ∼98.23%, and park transformation precisely estimates the inductance profile in rotor and stator frame of reference.

Practical implications

The model is developed for high-speed brushless AC applications.

Originality/value

The proposed SPMCPFSM enhance electromagnetic performance owing to partitioned PMs configuration which make it different than conventional designs. Moreover, the developed LPMEC model reduces computational time by solving quarter of machine.

中文翻译：

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分段PM后续极磁通开关机设计的集总参数等效电路模型。

目的

本文的目的是研究一种用于电机设计的替代简化分析方法。基于数字的有限元方法（FEM）是用于对电机进行精确建模和电磁性能分析的强大工具。然而，计算复杂性，磁饱和度，复杂的定子结构和时间消耗迫使研究人员采用替代分析模型进行电机特别是磁通开关机（FSM）的初始设计。

设计/方法/方法

本文针对新开发的分段式永磁随后极通量开关机（SPMCPFSM），提出了简化的集总参数磁等效电路（LPMEC）模型。LPMEC模型考虑了四分之一机器对所有机器零件的影响，这有助于降低计算复杂性，计算时间和驱动器存储，而不会影响整体精度。此外，在转子和定子参考系中执行电感计算，以便使用Park变换精确估计自感，互感和dq轴电感曲线。

发现

使用JMAG Commercial FEA软件包v.18.1对开发的LPMEC模型进行了相应的FEA验证，显示出良好的一致性，准确度约为98.23％，并且泊车变换精确地估计了转子和定子参考系中的电感曲线。

实际影响

该模型是为高速无刷交流应用开发的。

创意/价值

所提议的SPMCPFSM由于采用了与传统设计不同的分区PM配置而增强了电磁性能。而且，开发的LPMEC模型通过求解四分之一的机器来减少计算时间。