At the same time using Holzer sensors will be converted into pulse frequency motor speed feedback to the MCU, realize the speed closed-loopcontrol, to achieve speed detection.
同时利用霍尔传感器将电机速度转换成脉冲频率反馈到单片机中，实现转速闭环控制，达到转速检测目的。
2
It is suitable for control weak voltage current signal in the frequency converter controlloop.
主要用于变频器控制回路中微弱电压、电流信号的控制。
3
The SPLL consists of calculation frequency error, updating loop middle variable, and output control signal.