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1·The low. speed range comes to 30 percent of synchronous speed of the machine.

低速工作转速范围达同步转速的30％。

2·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。

3·The effectiveness of the PLC-based control software is satisfactory up to 96% of the synchronous speed.

基于PLC的控制软件的工作效率可达同步速度的96%，非常令人合意。

4·Their design is optimized for synchronous speed direct drive applications thus avoiding unnecessary and expensive construction features.

在设计上对同步直接驱动的应用进行了优化以避免不必要以及昂贵的工程设计。

5·Its rotor's change changes same as the rotary field, but the rotational speed slightly is higher than the rotary field the synchronous speed.

其转子的转向和旋转磁场的转向相同，但转速略高于旋转磁场的同步转速。

6·According to the features of the carpet washes drying machine, a synchronous speed controls system based on PLC and the swinging arm compensator was introduced.

根据铁路客车地毯清洗干燥机的工艺特点，研制了一种用PLC和摆式松紧架实现的同步控制装置。

7·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。

8·The machine can be operated in sub-synchronous, super-synchronous speeds, minimum rotor current and full compensation when adjusting the speed and reactive power independently.

控制系统可以单独控制电机的转速和无功功率，使其工作在超同步、亚同步、转子电流量最小和全补偿工作方式下。

9·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。

10·According to the requirements of synchronous speed control of series conveying belt, several patterns which could realize the synchronous speed control under frequency conversion was analyzed.

针对多级胶带输送机同步运行要求，分析了胶带机变频拖动同步运行实现的几种模式。