Usually, it is difficult to compute the power-factor of DC drive electric locomotive, furthermore, the outcome is not exact.

通常情况下计算直流传动电力机车的功率因数较为困难，而且计算出来的数值不甚准确。

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Analysis and discussions are made on certain technical problems occurring during the test of AC4000, the first ac drive main line electric locomotive as well as the causes thereof.

对国产首台ac4000交流传动干线电力机车试验中暴露出的几个技术问题及其原因进行了初步的分析与探讨。

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This paper presents the control strategy of type DSA250 pantograph on the electric control concept and pneumatic control concept about type KZ4A AC drive electric locomotive.

从电气控制原理和气动控制原理两方面介绍了KZ 4a型交流传动电力机车用DSA250型受电弓的控制策略。

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