By rotor position tracking observer, with heterodyning processing adopted, the rotor position signal can be picked up and then the self-sensing of the rotor position can be implemented without any specialized mechanical position-sensor. 通过采用外差法的转子位置跟踪观测器完成了转子位置信息的提取,实现无机械位置传感器的电机转子位置的检测。
The methods using rotating vector, carrier frequency excitation and heterodyning, tracking observers for rotor position estimation are discussed. 讨论了利用旋转矢量载波高频信号注入、外差法及跟踪观测器检测转子位置的原理。
Using this CO2 laser, the experiment of three-frequency heterodyning is suooefully carried out. 利用该激光器,成功地进行了三频外差测量研究。
The problem of recovery is implemented in a second order low-pass filter with heterodyning process. 高频载波的解调则通过一个带有外差处理的二阶低通滤波器来实现。
Because the two optical modes share the same cavity and experience the same phase fluctuations, a good phase noise performance heterodyning signal is expected due to the good phase coherence. 由于腔内两个正交激光模式是由同一个谐振腔产生,经历相同的相位波动、具有很好的相位相干性,因此拍频得到的微波信号具有很好的相位噪声性能。
Using heterodyning processing to the high frequency current, the rotor position error signal can be extracted. 通过对高频电流做外差处理,提取转子位置误差信号,省去旋转高频信号注入法中的同步轴系滤波单元。