摘要
在多相感应电机非对称T型等效电路的基础上,提出了一种静止状态下的参数辨识方法。考虑到低压大功率多相感应电机的参数较常规三相感应电机小,为避免逆变器非线性和补偿误差,采用直接测量相电压的方法代替电压重构法,可以准确辨识出电机的全部参数。针对励磁电感在数值上仅为几毫亨,对采样误差较为敏感的问题,励磁电感的辨识采用低频交流注入和突减电流两种方法互相校核。最后通过实验验证了该方法的有效性。
In order to obtain the accurate parameters of multiphase induction motor(IM)at standstill,a method was proposed based on the asymmetric T type circuit.Considering the smaller parameters of the low voltage and high power multiphase IMs than usual 3-phase IMs,voltage acquirement is via measuring phase voltage directly instead of voltage reconstruction so that the nonlinearity and compensation errors are avoided.Especially for the magnetizing inductance(approximately 8~10mH),both low-frequency injection and current dropping methods are adopted to validate the final value of magnetizing inductance.The experimental results show the validation of the proposed parameter identification method.
作者
郑仕达
杨家强
ZHENG Shida;YANG Jiaqiang(Zhejiang University,Hangzhou 310027,China)
出处
《大电机技术》
2018年第6期1-5,共5页
Large Electric Machine and Hydraulic Turbine
基金
国家自然科学基金(面上项目)(51777191)
关键词
参数辨识
静止状态
低压大功率
多相感应电机
parameters estimation
standstill state
low-voltage&high power
multiphase induction motor
