技术创新是企业赖以生存的支柱和持久发展的动力。2003年,我们即着手开展永磁同步牵引系统的基础研究。当时永磁技术在国外尚处于起步阶段,技术完全保密,对外严格封锁技术转让。我们只能从零起步,摸着石头过河,开展了大量理论 Technological innovation is the backbone of an enterprise’s survival and the driving force for its long-term development. In 2003, we started to carry out basic research on permanent magnet synchronous traction system. At that time permanent magnet technology is still in its infancy in foreign countries, the technology is completely secretive and the foreign countries strictly block the technology transfer. We can only start from scratch, feel the stones across the river, carried out a large number of theories