Ironless axial flux permanent magnet motor control with multilevel cascaded H-bridge converter for electric vehicle applications

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) Pub Date : 2016-12-01 DOI:10.1109/SPEC.2016.7846107

K. Sun, T. Summers, C. Coates

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引用次数: 5

Abstract

The Ironless Axial Flux Permanent Magnet (IAFPM) machine, also referred to as air-cored or coreless machine is a variant of the AFPM machine with the iron removed from the stator. This allows the efficiency and power density of the machine to be further improved [1]-[4]. However, IAFPM motors generally have very low inductance (< 50μH) due to their ironless nature [5], which increases the design complexity of the drive system as the motor currents becomes difficult to control. If neglected, the large current ripple will produce significant torque ripple. The Multilevel Cascaded H-bridge (MLCHB) converter topology could potentially address this issue. This paper first provides an analysis of the IAFPM motor characteristics and control method, then it provides a review of topologies currently used to control IAFPM motors. Lastly the application of a MLCHB converter for the control of low inductance motors is introduced. Simulation results of an IAFPM motor with 5μH line inductance driven by a MLCHB converter are presented with comparisons made to existing strategies.

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电动汽车用多电平级联h桥变换器无铁轴向磁通永磁电机控制

无铁轴向磁通永磁(IAFPM)电机，也被称为空芯或无芯电机，是一种从定子中去除铁的AFPM电机的变体。这使得机器的效率和功率密度得到进一步提高[1]-[4]。然而，由于IAFPM电机的无铁特性，通常具有非常低的电感(< 50μH)[5]，这增加了驱动系统的设计复杂性，电机电流变得难以控制。如果忽略，大电流纹波将产生显著的转矩纹波。多电平级联h桥(MLCHB)转换器拓扑可以潜在地解决这个问题。本文首先分析了IAFPM电机的特性和控制方法，然后对目前用于控制IAFPM电机的拓扑结构进行了综述。最后介绍了MLCHB变换器在低电感电机控制中的应用。给出了MLCHB变换器驱动5μH线电感的IAFPM电机的仿真结果，并与现有策略进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)

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