The approach, which takes the ratio of the stator voltage to current as the control criterion, improves the efficiency and power factor of asynchronous motors.
仿真计算及实验结果表明该控制方案可以使异步电动机在不同的负载下均呈现出较高的效率，并且兼顾提高功率因数。
Compared with the conventional TIG welding machine, this new inverter proves to have much higher efficiency and power factor, less volume and weight, and especially, more precise parameter control.
该焊机由于采用了中频逆变技术，使其效率和功率因数都有较大幅度的提高，不但减小了体积，减轻了重量，而且具有比传统TIG焊机更精密的控制、调节性能等。
Experiments result shows that this control system increase work efficiency and power factor by applying nearby capacitance compensation theory. The control system processes fine saving energy effect.
实验结果表明该节能控制系统利用就地电容补偿原理，降低了抽油机的总损耗，提高了工作效率和功率因数，具有较好的节能效果。
Single factor randomized block design was used in order to study chemical control effect of two new kinds of high efficiency herbicides Sumisoya and Harness on weeds in potatoes fields.
试验采用单因素随机区组设计，旨在研究禾耐斯与速收两种新型、高效除草剂对马铃薯田杂草的化学防除效果。
The saving energy control system is proposed for problem of oil drawing machine electric driver which efficiency and power factor is low.
针对抽油机电驱动装置效率和功率因数低、耗能严重的问题，研制了一台新型的抽油机节能控制系统。
IPCS technology was aimed at improving the effection that water shutoff and profile control enhance recovery efficiency factor.
IPCS技术的目的就在于改善高含水期堵水调剖提高采收率的作用。
Overrunning Speed Clutch is one of the key pats in impulseStepless Speed Regulators, and working capability depends on the control factor of its mechanism efficiency, twist moment and life - span.
超越离合器系脉动无级变速器的关键部件，其工作能力决定了整机效率的高低、输出扭矩的大小和耐用寿命的长短。
Overrunning Speed Clutch is one of the key pats in impulseStepless Speed Regulators, and working capability depends on the control factor of its mechanism efficiency, twist moment and life - span.
超越离合器系脉动无级变速器的关键部件，其工作能力决定了整机效率的高低、输出扭矩的大小和耐用寿命的长短。
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