高频电压注入法的频率因素对转子位置观测器的影响分析

摘要

The influence of the frequency for the high frequency voltage signal made on estimator was studied when the initial position was estimated with the theory of high-frequency voltage injection was employed.The theory of high-frequency voltage injection was introduced to estimate the initial rotor position of PMSM.Meet the minimum injection frequency estimation convergence was deduced.The influence of injection frequency on the estimate accuracy and speed of the rotor position observer was studied theoretically and experimentally,thereby suitable range of injection frequency was developed.Experimental results indicated that the reasonable cut-off frequency and appropriate injection frequency could effectively balance the estimating speed and precision of the estimator.%研究了在运用高频电压注入法进行初始位置判断时,高频电压信号的频率对估算器的影响.介绍了高频电压注入法估算转子初始位置的原理,推导了满足估算收敛的最小注入频率.通过理论和试验研究了注入频率对转子位置观测器估算精度及速度的影响,提出了注入频率合适的选取范围.试验证明,合理的截止频率与合适的注入频率能有效地平衡位置观测器的估算速度及精度.