该系统使用一个交流驱动系统用于向测试对象提供直接耦合输入。
The test system uses an AC drive system which provides direct coupled input to the test item.
该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。
The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.
采用GE交流电驱动系统技术，成功减少了系统保养工作量，更大力提高了车辆爬坡能力。
By adopting GE alternator drive system technology, system maintenance workload has been reduced and its grade ability has improved dramatically.
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