摘要
提出一种基于载波电压信号注入的新型无传感器永磁电机转子自测角原理,将电机本体作为旋变器,向电机绕组中注入载波电压激励信号.在分析载波电压信号激励下永磁同步电机数学模型的基础上,研究了基于凸极跟踪转子位置的自测角方法.讨论了载波信号的注入、提取以及包含转子位置信息的高频负序电流的外差处理技术.采用仿真结果进行了分析,通过旋变器的实测结果验证了其正确性.仿真结果表明,以此机理实现的永磁同步电机无传感器控制具有很好的鲁棒性,同时具有良好的静、动态性能.
This paper presents a new sensorless self-detecting-angular machine using carrier signal injection. The machine is regarded as a synchro/encoder, and a carrier voltage excitation signal is injected into the phase windings to estimate the rotor position. Based on analyzing the mathematic model of a permanent-magnet synchronous motor （PMSM） excited by carrier signal injection, a novel rotor position self-estimation method is investigated on the basis of rotor saliency-tracking technology. The carrier signal injection method and the heterodyning algorithm for the extraction of high frequency current containing rotor space-position information are all discussed. A simulation result is shown, and the validity of the proposed method is verified through the experimental results of an encoder. Simulation results illustrate the robustness of implementation and the effectiveness of the sensorless control of PMSM under transient operating conditions.
出处
《测试技术学报》
2008年第1期84-89,共6页
Journal of Test and Measurement Technology
关键词
永磁同步电机
凸极效应
转子自测角
差分处理
变速驱动
permanent magnet synchronous motor （PMSM）
salient-effects
self-detecting angular of rotors
heterodyning processing
variable speed drive
