Advance in Drive Control Technology and Speeding Up of Shinkansen EMUs

摘要

As described above, the ac motor drive system has now been accepted as a standard drive system for the rolling stocks and contributed to their speeding up. It will make further development with advance in the electronics technologies in the future. It is anticipated that those technologies related to the drive systems will develop in the direction toward: 1. Achieving the power devices with higher frequency, higher dielectric withstand voltage, larger capacity and higher performance. 2. Reducing loss of the power device and miniaturization of the main conversion device by improving the cooling structure. 3. Attaining higher function of the control device, improvement of the readhesion control function and practical use of the high adhesion control. 4. Decreasing the higher harmonics, decreasing the noises and loss of the drive system, optimization of the whole drive system including the cooling system and control system. 5. Improvement of reliability and realization of maintenance free. In conclusion it may be said that the light weight and high performance ac motor drive system which has been put into practical use by application of Japan's advanced electronics technologies to the power dispersion system characterizing Shinkansen EMUs since the advent of Series 0 is one of the most advance systems in the world. The authors have great expectations for further advance in the drive control technology.