摘要
定子磁链的有效观测直接决定转矩控制的稳定性。针对纯积分观测定子磁链存在的问题,对一阶惯性环节、幅值限定的改进积分器、一阶惯性环节串联HPF三种定子磁链观测方案进行了深入比较分析。定量分析了一阶惯性环节中截止频率对相位和幅值偏差的影响,给出了截止频率的选择依据;结合原理结构图分析了幅值限定改进积分器的效果;对比幅频特性图并得到带补偿的一阶惯性环节串联HPF环节。对幅值限定的改进积分器较一阶惯性环节带来幅值和相位的误差进行了补偿;而一阶惯性环节串联HPF则可以完全消除直流偏置和积分初值问题,进一步提高定子磁链的估算精度。通过仿真和试验进行了对比验证。
The stability of the torque control was directly decided by the effective of the stator flux observation, for the problem of stator flux in the pure integral observation, the first order filter, the amplitude limited of improved integrator, the first order filter series HPF three schemes of the stator flux observer were in-depth analyzed in comparison. Quantitative analysis of the influence of the first-order filter in the cutoff frequency of the phase error and amplitude deviation, and the selection basis of the cutoff frequency was given ; The effect of the amplitude limited of improved integrator was analysed with the principle construction diagram; Comparing amplitude-frequency characteristic diagram and obtaining the first order filter series HPF with compensation. The amplitude limited of improved integrator could make a compensation for amplitude and phase deviation compared to the first order filter; and the first order filter series HPF could completely eliminate the dc bias and integral initial value problems, made a big improvement to the estimation precision of the stator flux. The comparison verification was carried out with the simulation and experiment.
出处
《电机与控制应用》
北大核心
2016年第7期7-11,共5页
Electric machines & control application
