With the development of electrified railway, electric traction loads increase quickly.

随着电气化铁路的快速发展, 电力牵引负荷有了快速增长.

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It also introduces working principle and developing tendency of the shearer with AC electric traction.

阐述了变频调速技术在采煤机中的应用,介绍了交流电牵引采煤机工作原理及发展趋势.

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Industry of electric traction equipment is our country begins to start from 50 time metaphase.

牵引电气设备行业是我国自50年代中期开始起步.

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The problems concerning speed sensorless control in high - power electric traction drives was studied.

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.

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It also introduces working principle and developing tendency of the she area with AC electric traction.

阐述了变频技术在采煤机中的应用情况,介绍了交流电牵引采煤机的工作原理及发展趋势.

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The name Electric Traction Company was changed to the Hongkong Tramways Company Limited.

正式名为[香港电车有限公司].

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