【摘要】 针对现有永磁同步电机参数辨识算法复杂以及逆变器影响辨识结果的问题,依据最小二乘原理,在辨识相绕组R_s,转子磁链幅值ψ_f时,设计激励信号u_qref分别为方向固定、旋转的斜坡信号,在辨识d,q轴电感L_d,L_q时,分别设计激励信号u_dref,u_qref为方向固定的阶跃信号,从而消除逆变器的影响,简化dq同步旋转坐标系下的电机模型,完成R_s,ψ_f,L_d,L_q的辨识。依据理论整定公式和R_s,L_q的辨识结果,完成电流环P_I控制参数的整定。实验结果表明,辨识结果和真实值误差较小,用于电流环PI控制参数的整定可以得到与理论相近的控制效果。更多还原

【Abstract】 This paper aims at solving two major problems,that is,the existing algorithm for the parameter identification of permanent magnet synchronous motor is complex,and the inverters may affect the accuracy of the identification results.According to the principle of least squares,excitation signal uqrefare designed respectively to be direction-fixed and rotating ramp signal when identifying the phase winding Rsand the rotor flux amplitudeψf;and the excitation signal udrefand uqrefare designed to be direction-fixed step signal when identifying the Ldand Lq inductances of d and q axis.Thereby,the influence of the inverter is eliminated.And with the motor model in dq synchronous rotating coordinate motor model simplified,the identification of Rs,ψf,Ld,and Lqis completed.According to the theoretical tuning formula and the identification results of Rsand Lq,the tuning of the current loop PI control parameters is completed.The experimental results show that the identification result is close to the true value with small errors,and the experimental current response is close to the theoretic analysis.更多还原