飞机电动环控用高速电机全速域无位置控制稳定性分析

Stability Analysis of Sensorless Control of High-Speed Motor in Full-Speed for Aircraft Electric Environment Control

以飞机电动环控用高速永磁同步电机(High-speed permanent magnet synchronous motor,HSPMSM)控制系统为研究对象,考虑到HSPMSM无传感器控制的研究主要集中在算法实现和转子估计误差消除方面,本文提出了一种基于小信号分析的无传感器全速控制全局稳定性分析和参数设计方法。该方法在扩展反电动势法的基础上设计了位置估计环的参数,并建立了位置估计环和速度环的参数对系统稳定性的影响。其次,本文使用根轨迹来设计I/f控制能够运行的最高转速和扩展反电动势法能够运行的最低转速,以确定算法切换的稳定转速。同时分析了电机参数在高温下的灵敏度。最后,在45 kW、4000 r/min表贴式HSPMSM上进行了全速域电动环控实验。结果表明,本文设计的回路参数和切换转速具有更好的动态和稳态性能,参数的灵敏度与理论分析一致,为HSPMSM的全局参数设计和灵敏度分析提供了可行的思路。

This paper takes the high-speed permanent magnet synchronous motor(HSPMSM)control system for electric environment control as the research object.Considering that researches on sensorless control of HSPMSM mainly focuses on algorithm realization and rotor estimation error elimination,we proposes a global stability analysis and parameter design method based on small-signal analysis for sensorless control in full-speed.This method designs the parameters of the position estimation loop based on extended back electromotive force(EMF)method,and studies the influence of the parameters of position estimation loop and speed loop on system stability.Then we uses the root locus to design the upper frequency of I/f control and the lower frequency of extended back EMF method to determine the stable domain of switching.Also,the sensitivity of motor parameters under high temperature are analyzed.Finally,full-speed experiment is carried out on the 45 kW,40000 r/min surface mounted HSPMSM for electric environment control.The result shows that the designed loop parameters and switching speed achieve better dynamic and steady-state performance,and the sensitivity of parameter is consistent with the theoretical analysis.It provides a feasible idea for global parameter design and sensitivity analysis of HSPMSM in the full-speed.