摘要
传统基于滑模观测器的转速辨识系统,由于纯积分环节的影响,造成电机在低速段转速辨识精度较差、输出转矩脉动大以及电流谐波含量较高等问题。因此,提出将模型预测直接电流控制策略与基于滑模观测器的转速辨识策略相结合的方法,对观测器输出电流进行延时补偿和预测计算,提升了转速辨识精度,通过价值函数的在线优化得到最优电压矢量,进而达到改善输出电流品质、抑制转矩脉动的效果。最后在Simulink仿真平台上验证该方案的有效性。
The traditional speed-based observer-based speed identification system,due to the pure integral part of the impact of the motor in the low speed speed identification accuracy is poor,the output torque ripple and the current harmonic content is high and so on.Therefore,the method of forecasting the direct current control of the model and the speed identification strategy based on the sliding mode observer is proposed to delay and predict the output current of the observer. The accuracy of the speed recognition is improved and the optimal voltage vector is obtained by online optimization of the value function and the effect of improving the output current quality and suppressing the torque ripple is achieved.Finally,the effectiveness of the scheme is verified on Simulink simulation platform.
出处
《变频器世界》
2018年第12期88-92,共5页
The World of Inverters
关键词
转速辨识
模型预测
延时补偿
价值函数
Speed identification
Model prediction
Delay compensation
Value function
作者简介
褚方舟(1992-)男硕士研究生研究方向为电力传动及控制技术
