synchronous speed

基本解释

The efficiency of PLC control is increased at high speeds up to 95% of the synchronous speed.
PLC控制效率在同步速度达到95%时提高不少。
Because the AC asynchronous motor' synchronous speed is determined by the frequency, we can control the AC asynchronous motor' speed by changing the supply power's frequency.
交流变频调速系统是利用异步交流电动机的同步转速随频率变化的特性，通过改变电机的供电频率而进行调速。
The coupled dc motor can be adjusted so that the speed of the system is higher than the synchronous speed and the system rotates in the same direction as the stator rotating field.
所连接的直流电动机可以这样调整使得其转速高于同步转速且旋转方向与定子旋转磁场的方向一致。

Metro networks have phone gear like digital cross-connects, which manage high-and low-speed traffic, and synchronous optical network (Sonet) systems, which come from fiber-optic phone networks.
FORBES: The God Box
The top-of-the-line Sanshara drives employ synchronous NAND technology and deliver the best speed and performance available in flash-based storage.
ENGADGET: Modbook Pro to launch with SSD storage, up for pre-order October 3rd
These boxes took in low-speed, asynchronous data from the field and packed it into high-speed (9600 bits per second, it seems quaint now) synchronous trunks.
FORBES: The Fall Of The Texting Empire