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本文就我国未来高级电气牵引客车上空调机供电电源采用Ｄ－Ｆ机组的可行性进行了讨论，提出了相应的措施，重点研究了单相电容电动机起动与运行电容的计算方法，实验结果证明，这种计算方法比较符合实际。
In this paper, the feasibility of using D-F unit for the power supply of air conditioner in our country’s advanced electric towing passenger car is discussed. Corresponding measures are put forward. The calculation method of starting and running capacitor of single phase capacitor motor is emphatically studied. The experimental results show that, This calculation method is more realistic.