与内燃机不同的是，电力汽车具有完美的扭矩表现，其牵引力也因此得名，从零转速起，就像离弦之箭一样不需要借助加速箱。
Unlike internal-combustion engines, electric motors have full torque, as pulling-power is called, from zero revs. They are thus predisposed to go like a bat out of hell without the aid of a gearbox.
大秦线上运行的两万吨运煤列车长度可达7公里，由大功率电力机车牵引，大大降低了运营成本。
Along this line 20,000-ton coal trains can reach a length of over 7 km pulled by powerful electric locomotives over an extra heavy duty track and driving down operating costs.
针对直流电力牵引区段车辆段轨道电路中的信号电流存在的迂回问题，提出了在工程设计中的防范措施。
For the problem of signal current bypass with track circuit of rolling stock depot in DC electric traction sections, the paper provides measures to prevent it.
研究了无速度传感器控制技术在大功率电力牵引传动系统中应用问题。
The problems concerning speed sensorless control in high-power electric traction drives was studied.
通过无线感应，该系统还为电梯内部的照明以及电子产品提供电力，无需再使用物理牵引缆线。
This system can also deliver power to the car's internal lighting and electronics through wireless induction, so no physical tether is needed.
全路客运客车和货运客车大多采用电力机车牵引。
The electric locomotive traction is mostly used in the whole railway passenger carriages and freight passenger carriages.
电力牵引区段的两条钢轨，既作为轨道电路的通道来传输信号电流，又作为牵引电流的回路来传送牵引电流。
The two rails are not only signal lines of track circuits, but also loop current line of locomotive traction current in electrified railway block.
实验结果分析表明，该方法能够有效地应用于电力机车笼型异步牵引电机的故障诊断。
The experimental result shows that the method can effectively be used to fault diagnosis of cage asynchronous traction motor on electric locomotive.
为了解电力牵引的双线铁路运营隧道空气污染状况，选择军都山隧道进行现场测试。
For investigating the air pollution in double line railway tunnel by electric traction, we tested the air condition in Jundushan tunnel.
这保证了公司电力牵引，并允许在未包倾斜，从主持会议时脱离停泊。
This ensures a firm traction and allows the power pack to be parked without tilting, when detached from the chair.
介绍了SS7C型客运电力机车的主要设计思路、特性、技术参数等，对其牵引客运列车的性能进行了简要的分析。
Main design thought, features as well as technical parameters of SS7C passenger electric locomotive are presented. Also briefed is its traction performance of passenger train.
风力发电机、高速电力机车用牵引电机等，为达到大功率、小体积的使用效果，广泛使用高导电性和高强度的铜合金。
Copper alloy with high conductivity and high strength is widely used for wind mill generator and pulling motor used for electric express locomotive to reach to high power and small in size.
本文对高速铁路电力牵引电磁干扰影响的特点进行了分析，并提出防护途径。
The paper analyzes the features of electromagnetic interference on electric traction of high speed railway, and puts forward the protection approaches.
本文依据矢量控制的基本原理，针对电力牵引系统对电机控制性能的要求，设计了基于转子磁场定向的矢量控制交流调速系统。
In this paper a vector controlled ac speed-regulating system is developed, which adopts the rotor flux field-orientated theory to meet the requirements for an electric traction system.
给出了该变压器在相坐标下的节点导纳矩阵，以便同电力系统和牵引网接口进行有关分析。
The nodal admittance matrix in phase coordinates of the transformer is obtained, which can be conveniently used to interface with power systems and traction networks in related analyses.
本文介绍了采用最优化方法进行电力机车牵引齿轮设计计算的程序。
The paper represents the computation program with the method of new optimization in the design of traction gear of electric locomotive.
大功率GTO逆变器用于铁路电力牵引，其PW M控制与一般工业领域中的变频调速系统的PWM控制有很大不同。
High power GTO inverter is used for railway electric traction. Its PWM control is significantly different from variable frequency drive system in conventional industrial area.
通过分析发现电力机车空载启动和牵引变空载合闸都会在系统变压器中造成和应涌流。
The sympathetic inrush may occur in the system transformer when no-load electric locomotive or traction transformer is switched, so the protection may be affected.
在电气化铁路轨道电路中，两条钢轨即是轨道信号的传输线，又是电力机车牵引电流返回变电所的回流线。
In electric railway track circuit, the two steel tracks are both transmission line of the track signal and return line for electric locomotive tractive current back to electric substation.
阐述电力牵引传动与电力电子器件相互促进和相互依存的密切关系。
The article describes the close relation between electric traction drive and power electronic devices that improve and rely on one another.
由于全并联at供电方式输送功率大、接触网电压损失低，因而特别适用于高速铁路电力牵引供电。
The all-parallel AT traction system is the most suitable system to supply the power of high-speed railway because of its characters of higher transport power, lower voltage drop.
无功、负序和谐波的不良影响需要在电力系统进行评估，在牵引供电系统中采取技术措施以期综合解决。
The harmful effects brought by reactive power, harmonics and negative sequence usually be evaluated on some sensitive power system nodes and be comprehensive solved in the traction power system.
截至2015年年底，铁路主要干线全部实现内燃、电力机车牵引，客货运输车辆品种和结构均实现升级换代。
By the end of 2015, all railway trunk lines had realized diesel and electric locomotive traction; types and structures of passenger and freight transport vehicles had been upgraded and updated.
电气化铁路接触网担负着把从牵引变电所获得的电能直接输送给电力机车使用的重要任务。
The important role of electric railway catenary is to transfer electrical energy from traction substation to electric locomotive.
全控型电力电子器件IGBT在牵引电传动电能传输与变换、有源滤波等领域得到了广泛的应用。
All-controlling power electronics device IGBT in traction power transmission and transformation of power transmission and active filter etc widely application.
进入21世纪，世界轨道电力牵引变流技术装备在降耗提效、减少污染方面取得了新的进展。
The world rail electric traction converter technology equipments ha ve taken new headway in advancing efficiency and reducing wasting and pollution in the21st century.
最后，着重介绍了个性化培训的实现方法、培训仿真智能化的实现方法、电力营销智能培训牵引策略。
Lastly, I will emphasize the realize method of characteristic training, intelligent of training simulation, and draught policy of intelligence power marketing training.
随着电力电子技术的飞速发展，非线性装置被广泛应用于电力牵引系统，这就不可避免地引发了谐波危害问题。
With rapid development of electric power and electron technique, nonlinear equipments are applied in power drawing system widely, which will cause harmonic harm question inevitably.
高速铁路列车速度快、行车密度大，要求牵引功率高，电力牵引成为高速铁路动力牵引的必然选择。
For the rapidity and traffic density of trains on high-speed railway, larger traction power is needed, so the electric power supply is adopted.
高速铁路列车速度快、行车密度大，要求牵引功率高，电力牵引成为高速铁路动力牵引的必然选择。
For the rapidity and traffic density of trains on high-speed railway, larger traction power is needed, so the electric power supply is adopted.
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