three-phase alternating current 三相电流 ; 三相交流 ; 三相交流电流
four-wire three-phase alternating current system 三相四线式交流系统
three-phase alternating current induction motor 三相交流感应电动机
three phase alternating current motor 三相交流电机 ; 三相交流电动机
three-phase alternating-current motor 三相交流电动机
three-phase alternating-current supply 三相交流电源
three-phase alternating current motor 三相交流电机
three-phase alternating current supply 三相交流电源
Hardware of the tension control system was designed. It is consists of power,circuit board,frequency conversion,three phase alternating current motor and so on.
7.张力控制器的硬件设计,系统硬件由电源、张力控制电路板、变频器、三相交流异步电机构成。
参考来源 - 凹印机张力控制系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
电力变换器主电路部（3），其根据该脉冲宽度调制波对 开关元件进行驱动，将直流电压转换为三相交流电压；
A three-phase alternating current parameters instrument to be used in industry is designed. It can measure the voltages, currents, power factors of each phase of three-phase alternating current.
设计开发一种工业用三相交流电参数仪，能够测得三相交流电各相的电压、电流、功率、功率因子等参数；
The modified types will not be equipped with commutation transformer and the three-phase alternating current power supply directly acquires DC voltage through bridge type rectifier.
改进型不配整流变压器，将三相交流电源直接由桥式整流获得直流电压。
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