Fast Computation of Radial Vibration in Switched Reluctance Motors
Fast Computation of Radial Vibration in Switched Reluctance Motors
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DOI：
10.1109/tie.2017.2767548
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发表时间：
2018-06
影响因子：
7.7
通讯作者：
Xiaoqiang Guo;Rui Zhong;Mingshu Zhang;Desheng Ding;Weifeng Sun
中科院分区：
文献类型：
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作者：
Xiaoqiang Guo;Rui Zhong;Mingshu Zhang;Desheng Ding;Weifeng Sun
提出了一种快速计算开关磁阻电机径向振动的新方法。该方法仅采用分段一阶线性函数计算总峰值加速度，计算速度较快。整体径向振动是各振型固有振动的叠加。在此之前，需要预先计算或测量几个关键参数，包括每个模态的重量因子、固有频率和阻尼比，以获得每个模态各自的固有振动的解析表达式。首先，从径向力突变的角度，解析地推导出与海流倍数及其斜率有关的总峰值加速度。在此基础上，提出了一种由总峰值加速度计算各振型峰值加速度分布权重系数的简单方法。固有频率的测量和比较的三种方法，包括有限元分析，锤脉冲测试，和直流脉冲激励。针对传统阻尼比计算方法不能用于多自由度系统的问题，对阻尼比的计算方法进行了改进。最后，通过仿真和实验验证了该方法的有效性和准确性。
This paper proposes a new method for fast radial vibration computation in switched reluctance motors. Only a piecewise first-order linear function is used to calculate the total peak acceleration, which is rather fast. The overall radial vibration is the superposition of natural oscillation of each mode. Before that, several critical parameters need to be calculated or measured in advance, including weight factor, natural frequency and damping ratio of each mode, in order to obtain the respective analytical expression of natural oscillation of each mode. First, the total peak acceleration concerning the multiple of current and its slope is derived analytically from the perspective of abrupt change of radial force. Then, a simple method for calculating weight factors is presented for the distribution of peak acceleration of each mode from the total peak acceleration. Natural frequencies are measured and compared by three methods, including finite-element analysis, hammer impulse test, and dc pulse excitation. The calculation of damping ratio is improved since the traditional damping ratio calculation method cannot be used in a multiple degree-of-freedom system. Finally, both simulation and experiments are conducted to verify the effectiveness and accuracy of the proposed method.