永磁同步电机-虚拟电流环控制技术的研究

Study on virtual current loop control technology for PMSM

首先从永磁同步电动机(Permanent Magnet Synchronous Motor,PMSM)无电流传感器的角度出发,提出了虚拟电流环控制方案。在分析了永磁同步电机数学模型的基础上,得出采用电流估算方式来重构反馈电流,以此来实现永磁同步电机转速、电流的双闭环控制。搭建了系统仿真模型和硬件实验平台,仿真及实验结果表明控制系统采用该方案后有效地实现了电机响应速度快、控制精度高的良好控制性能,从而验证了该方案的可行性和合理性。

Firstly ,from the angle of permanent magnet synchronous motor（PMSM） with no current sensor, the scheme of virtual cur- rent loop control was proposed. Based on analyzing the PMSM mathematical model, current estimates mode was established to recon- struct the feedback current, and so as to achieve the purpose of dual closed-loop control of speed and current of PMSM. Secondly, system simulation model and hardware test platform was built, and the simulation and experimental results verify the virtual current loop control scheme, which can effectively realize the good motor control capability of fast response and high precision , and also proves the feasibility and rationality of the scheme in the paper.