机械外文翻译--世界电力机车的发展(编辑修改稿)

机械外文翻译--世界电力机车的发展(编辑修改稿)内容摘要：

be easy to achieve in the larger context of the lootive speed, but such Motor due to the mutator, manufacturing and maintenance are very plex, and also greater volume), the AC into DC lootive in the task pleted. The catenary system DC voltage than to raise a lot of contact wire diameter can be relatively reduced, reducing the consumption of nonferrous metals and construction investment did not. Therefore, the frequency munication system has been widely adopted by majority of the world39。 s electric lootive also pay DC electric lootive. TACDirectexchange by exchange of nonelectric lootive traction motor mutator (that is, threephase asynchronous motors),which is in the motor manufacturing, performance, functionality, size, weight, cost, maintenance and reliability and so on than the motor mutator much easier. It is the failure of the electric lootive, is the main reason for speed rather difficult. This lootive has excellent traction capacity promising. Germanmade electric lootive E120 This is the lootive. The working principle of electric lootive, the current contact wire, and withstand electric lootive into the arch after reentering the circuit breaker after the main transformer, AC traction from the main transformer winding through silicon rectifier units, divided into two groups of six parallel to the traction motor DC supply concentrate to a traction motor torque, the mechanical energy into electric energy through the transmission geardriven lootive drive wheels turning. The development of electric lootives: The first to create the first standard gauge electric lootive is the Scots R Davidson, time is 1842. May 1879, the German Siemens W V design and manufacture of a 18 to pull on the three open passenger electric lootive, this is the first electric lootive successful pilot. 1881, Paris, France at the first of electricity from overhead wires tram lines, which for the upgrade, using highpower traction motors to create the conditions: 1895, the United States in Baltimore Ohio between km long tunnel section DC electrified railway construction. 1903 Germany39。 s threephase AC electric lootive created a 210 km per hour highspeed recording. Electric lootive of development depends on the development of electrified railway. Build a real sense electrified railway is first necessary to resolve how to provide highvoltage, change standard power supply problems. Catenary lootive current。