The disc coreless permanent magnet synchronous machine (PMSM) has a special coreless structure. This kind of PMSM has very low inductance, which is referred to as the low-inductance PMSM(LIPMSM) in this paper. The LIPMSM offers many advantages to drive systems. However, the current fluctuates strongly when driven by general converters, which makes the LIPMSM difficult to be popularized into modern drive systems. To tackle the above problems, a converter with output inductance is used. The influences of the inductance on the performance of the LIPMSM system are analysed, including current fluctuations, the maximum speed without flux weakening and the current response time. Based on above analyses, a method of obtaining the optimal inductance is proposed to obtain the optimal inductance simply and efficiently. The method has been verified through simulations and experiments. The system cannot work due to the huge current fluctuations when driven by the general converter. By using the converter with the optimal inductance, the current fluctuations have been reduced to 2 A. The experimental LIPMSM can reach 11000 rpm with very short response time of the current. Therefore, the LIPMSM system performance can been improved significantly and meet the requirements by using the converter with the optimal inductance.

中文翻译：

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改善低电感PMSM驱动系统性能的方法

盘式无芯永磁同步电机（PMSM）具有特殊的无芯结构。这种PMSM具有非常低的电感，在本文中被称为低电感PMSM（LIPMSM）。LIPMSM为驱动系统提供了许多优势。但是，当由通用转换器驱动时，电流波动很大，这使得LIPMSM难以推广到现代驱动系统中。为了解决上述问题，使用了具有输出电感的转换器。分析了电感对LIPMSM系统性能的影响，包括电流波动，无磁通减弱的最大速度和电流响应时间。在以上分析的基础上，提出了一种求最佳电感的方法，可以简单有效地求出最优电感。通过仿真和实验验证了该方法。由通用转换器驱动时，由于巨大的电流波动，系统无法工作。通过使用具有最佳电感的转换器，电流波动已减小至2A。实验LIPMSM的电流响应时间非常短，可以达到11000 rpm。因此，通过使用具有最佳电感的转换器，可以显着改善LIPMSM系统的性能并满足要求。