Thus, sensorless control strategy which only according the sampling of the current and voltage to estimate the rotor position and speed by specific methods will be widely applied.
因此，在一些特殊及精度要求不高的场合，由只根据采样电流、电压等易测量，通过特定方法估算转子位置和转速的无位置传感器控制策略将得到广泛应用。
In the sensorless control system, a specified high frequency signal is injected in to trace the magnetic anisotropy of the motor, by which we can get the value of rotor speed and position.
研究采用高频注入法的无传感器直接转矩控制系统，通过注入特定的高频信号来追踪电机转子的空间凸极效应，以此得到转子位置和速度值。
Detecting back EMF is one of the most important methods for the detection of rotor position in square wave current drive BLDCM sensorless control.
方波电流驱动的BLDC电机无位置传感器控制检测转子位置的最重要方法是反电动势检测法。
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