为加快实现我国铁路电气化的进程，改造内燃牵引为电力牵引具有现实的迫切性和实际的可行性。

For the purpose of quickening the realization of railway electrization in China, it is necessary to change the diesal traction to electric traction.

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。

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.

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

电力电子技术的新的应用涌现于电力牵引和工业以及发电、输电和配电领域中。

New applications of power electronics are emerging in the worlds of traction and industry and those of generation, transmission and distribution.