永磁同步电机静止参数辨识及电流环控制器自动参数整定

在永磁同步电机数字控制系统中，电流环控制器的参数整定是影响电流环带宽和系统控制性能的重要因素。为优化控制参数设计流程，提出一种基于静止参数辨识的自动整定方法，使控制系统在匹配不同电机平台时具有通用性。在永磁同步电机静止条件下，通过两点式伏安法辨识定子电阻值，消除脉宽调制中死区对定子电阻辨识的影响；通过高频注入法激励定子绕组，运用离散傅里叶变换分别得到交直轴电感值。分析推导自动整定电流环控制器参数方法，并根据辨识参数设计电流环控制器，在两组永磁同步电机实验平台上进行实验。实验结果表明：该控制方法可以使永磁同步电机具有良好的动态和静态性能；永磁同步电机静止参数辨识及电流环控制器参数自动整定方法是有效的。

Standstill Parameter Identification of Permanent Magnet Synchronous Motor and Parameter Auto-tuning Method of Current Loop Controller

In the digital control system of permanent magnet synchronous motor (PMSM)，the parameter setting of current loop controller is an important factor affecting the current loop width and system control performance. An auto-tuning method based on standstill parameter identification is proposed to optimize the design process of control parameters，so that the control system is suitable for different motor platforms. In a standstill condition of PMSM，the stator resistance is identified by two-point voltammetry to eliminate the influence of dead band on stator resistance identification in pulse width modulation，the stator windings are excited by high frequency injection method，and the inductance values of quadrature and direct axis are obtained by using discrete Fourier transform. The method of parameter auto-tuning of current loop controller is analyzed and derived，and a current loop controller is designed according to the identified motor parameters. The proposed method was tested on two PMSM experiment platforms. The experimental results show that the proposed control method can make the PMSM have good dynamic and static performance.The validity of the method for standstill parameter identification of PMSM and parameter auto-tuning of current loop controller is proven through experiment.