在交流电路中，电流的幅度是连续不断地变化的，因此相位和时间的概念变得十分重要了。
In ac circuits, the current amplitude changes continuously that the concept of phase or time becomes very important.
谐波理论分析对于非正弦交流电路的研究具有重要的理论和实际意义。
The analysis of modulation wave theory has very important theoretical and actual meaning for studying non sine alternating current.
本文以发动机测试中一项重要的特性测试项目——速度特性测试为目的，重点研究了交流电力测功机及其控制系统设计。
Aiming at the speed characteristics test, which is one of important test items of engine test, this paper proposes studies of ac electrical dynamometer and its control system.
不过，在分析交流电路时，重要的是不仅要考虑相量的幅值，还要考虑相量的方向。
However, when analyzing AC circuit, it is important to consider the magnitude as well as the direction of phasor quantities.
晶界原子畸变和晶粒尺寸对纳米体系的交流电导有重要的影响。
The crystalline grain size and the distortion of interfacial atoms have great influence on the d.
交流电量测试是移动电站测试的重要内容。
Measurement on alternating electricity is very important in movable power station test.
在计算电缆群载流量时，交流电阻是一个重要的参数，其中邻近效应是计算交流电阻的一部分。
Ac resistance of cable conductor is an important factor to calculate the ampacity of cable bundles, and proximity effect factor is an important parameter to affect ac resistance.
交流电动机是广泛用于各领域的重要动力设备。
Alternating current motor is the important power equipment applicated in various fields.
三相同步发电机作为三相工业频率的交流电源，研究其有功功率调节具有重要意义。
It's significant to study the regulation of active power of three-phase synchronous generator by way of the alternating power source of three-phase industrial frequency.
交流电力测功机是发动机测功系统的重要设备，励磁控制系统是测功系统负载调节的主要控制装置。
AC electrical dynamometer is a key equipment of engine power-test system, whose load is mainly regulated by the excitation control system of electrical dynamometer.
目前，交流电力测功机是进行发动机性能试验的重要装置，其优点在于试验条件容易控制，参数便于采集处理，测量精度较高。
AC electrical dynamometer is an important device for engine test with easy-controlled testing conditions, easy-collected and managed parameters as well as high measuring precision.
交流电机是一种机电能量转换的重要装置。
The AC motor is an important mechanism of energy converting between mechanical and electrical.
决定交流污闪条件的最重要的因素是交流电弧的恢复条件，而不是以往人们所认为的重燃条件。
It is proposed that the most important factor to determine the ac flashover criterion is the recovery condition, but not the reignition condition as proposed by others.
无功功率是交流电力系统设计和运行中的一个重要因素，为了减少电能损失，需要在电力用户端与电力系统的变电所内合理配置一定的无功补偿装置。
Workless power is an important factor in designing and running of alternating current system. A compensation device is needed in substation and the end users to save electricity.
交流耐压试验是交流电气设备最重要的试验项目，是考验被试品绝缘承受交流电压能力的有效方法。
AC Withstand Voltage test is the most important test item to AC electric equipments, is a valid method of trying out the ability of the insulation withstanding AC voltage of tested object.
飞机电源系统是飞机机载设备的重要组成部分之一，包括交流电源系统和直流电源系统。
Aircraft electric power source system (AEPSS) is an important part of aircraft equipment. AEPSS includes AC-AEPSS and DC-AEPSS.
无功功率是交流电力系统设计和运行中的一个重要因素，它与电力系统的安全稳定和经济运行息息相关。
Reactive power is a crucial factor for the design and operation of ac power systems, and is closely bound up with the safety, stabilization, and economical operation of the power system.
无功功率是交流电力系统设计和运行中的一个重要因素，它与电力系统的安全稳定和经济运行息息相关。
Reactive power is a crucial factor for the design and operation of ac power systems, and is closely bound up with the safety, stabilization, and economical operation of the power system.
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