Analysis on accuracy of rotor‐locked transient‐response‐based vibration model for switched reluctance machines
Analysis on accuracy of rotor‐locked transient‐response‐based vibration model for switched reluctance machines
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DOI：
10.1049/elp2.12181
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发表时间：
2022-03
影响因子：
1.7
通讯作者：
Bingchu Li;Zikang Dong;Yixiang Huang;Chengliang Liu
中科院分区：
文献类型：
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作者：
Bingchu Li;Zikang Dong;Yixiang Huang;Chengliang Liu
研究了基于转子锁定暂态响应的开关磁阻电机振动模型的准确性。RLTR是开关磁阻电机闭锁关断时，径向力突变引起的定子振动，开关磁阻电机的总振动可以模型化为RLTR级数的线性叠加。建立了开关磁阻电机的机电模型，阐明了电机在转子闭锁时，机电模型中的某些速度相关项会被忽略，从而导致转子闭锁状态下的RLRT与旋转状态下的RLRT不可避免地存在差异，并通过多物理仿真说明了这种差异。提出了一种简谐的径向力模型来定量评估基于RLTR的振动模型的精度，比较了锁定转子和旋转转子的径向力谱，以预测基于RLTR的振动与实际振动的相对误差。分析了关断角和速度对基于RLTR的振动模型精度的影响。通过在三相12/8开关磁阻电机上的实验，对基于RLTR的振动模型的精度进行了评估，结果表明：(1)基于RLTR的振动模型的精度受关断角度和速度的影响；(2)基于RLTR的振动模型与实际振动之间的相对误差可以用简谐的径向力模型来预测。阐述了常用的基于RLTR的开关磁阻电机振动模型建模误差的产生机理，提出的误差预测方法可以通过误差补偿来提高开关磁阻电机振动模型的精度。
This paper investigates the accuracy of rotor‐locked transient‐response (RLTR)‐based vibration model for switched reluctance machines (SRM). RLTR is stator vibration stimulated by abrupt change of radial force when turning off one phase of SRM with rotor being locked, the total vibration of SRM can be modelled as linear superposition of RLTR series. An electromechanical model is built to clarify the generation of SRM vibration, it is revealed that some velocity‐depend terms in electromechanical model would be neglected when rotor is locked, it leads to inevitable difference of RLRT between rotor‐locked condition and rotational condition, the difference is illustrated through multi‐physics simulation. A harmonic radial force model is proposed to quantitatively evaluate the accuracy of RLTR‐based vibration model, radial force spectrums with locked rotor and rotational rotor are compared to predict relative error between RLTR‐based vibration and actual vibration. The influence of turn‐off angle and velocity on accuracy of RLTR‐based vibration model is also analysed. The accuracy of RLTR‐based vibration model is evaluated through experiment on 3‐phase 12/8 SRM, the results showed that: (1) the accuracy of RLTR‐based vibration model is impacted by turn‐off angle and velocity; (2) relative error between RLTR‐based vibration and actual vibration can be predicted using harmonic radial force model. This paper illustrates the generation mechanism of modelling error for commonly used RLTR‐based vibration model of SRM, the proposed error prediction method could lead to improved accuracy on SRM vibration model through error compensation.