When the rotationalfrequency exceeds the forced commutation frequency specified with the status of the FST pins, the operation mode is switched to the sensorless mode.
当转动频率超过FST引脚状态指定的强制换向频率后，运行模式切换到无传感器运行模式。
2
Unlike the better balanced straight-six or even the ultra-smooth V-12 engine, the humble four-cylinder generates an up and down vibration with a frequency of twice the crankshaft's rotational speed.
To enlarge measurement range of particle rotational speed, a dual- frequency imaging method was presented, with mathematical analysis and proving experiment.