摘要
针对永磁同步电机(PMSM)无差拍电流预测控制(DPCC)系统易受模型失配影响,导致电流静差的问题,提出了一种具有延迟补偿的改进DPCC策略来实现精确的电流环控制。此处根据旋转坐标系下PMSM模型,针对数字控制系统的固有延迟,采用电流预测校正算法估计下一时刻电流值;构建了带扰动补偿的无差拍电流预测控制器,将输出量进行前馈补偿,该算法适用于电机模型定子电感、电阻与磁链失配的情况,可有效抑制因参数失配引起的电流静差。实验结果表明,此处采用的算法较传统DPCC策略在补偿控制延迟的同时,对模型失配时的电流静差有明显的抑制作用,并具有较强的鲁棒性。
Aiming at the problem that the permanent magnet synchronous motor(PMSM)deadbeat predictive current control(DPCC)system is susceptible to model mismatch,which leads to static current difference,a robust DPCC strategy with delay compensation is proposed to achieve accurate current loop control.Based on the PMSM model in the rotating coordinate system,the current delay value of the digital control system is estimated by the current prediction correction algorithm.The internal model disturbance observer is built to feed-forward compensate the output.This algorithm is suitable for motors.Model stator inductance,resistance and magnetic chain mismatch can effectively suppress the current static difference caused by parameter mismatch.The experimental results show that the algorithm used has a stronger suppression effect than the traditional DPCC strategy while compensating the control delay while suppress-ing the current static difference during model mismatch.
作者
仝淼
李好文
郑岗
TONG Miao;LI Hao-wen;ZHENG Gang(Xi'an University of Technology,Xi'an 710048,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第12期99-102,共4页
Power Electronics
关键词
永磁同步电机
无差拍电流预测控制
延时补偿
permanent magnet synchronous motor
deadbeat predictive current control
delay compensation
