The paper expatiates the relationship of locomotive reliability,maintainability with availability.As an example of one locomotive,it presents the evaluation method of its inherent and technical availability and points out that the integrative balance between reliability and maintainability design of locomotive should be considered in order to achieve the specified targets of availability.
This article briefly introduces the latest developed domestic powerful AC-drive passenger electric lo-comotive(type DJ 2).Its overal structure,technical characteristic and main technical parameters are described in gen-eral,and its calculated trac tion behavior is analysed.Hence,it is pointed out that AC-drive represents the developing trend of Chinese traction power in the21st cen tury.
Many new technologies,new structures are applied in the design of type JD112asynchronous traction motor,which may used on metro and urban rail vehicles.Me an while the series and generalization principle s are also considered.This article in tro-duces the main parame ters,tech ni cal performance,design characteristic s and structure of the motor.
The interactive effects of aided cutting gases on CO 2 TEM00CW laser cutting of silicon steel sheet are studied.The qualitative analysis of the formation and elimination of the sinter is discussed.The cutting efficiency is ex-periment studied too.
The developing of laser technology and its application in manufacture is presented in this paper.As an example,the application of laser cutting and laser surface strengthening treatment technology in some of the manufac-ture of locomotive parts is introduced.The current situation and future perspective of laser technology to locomotive manufacture is clarified.
SS3B型电力机车接口插件电路是机车控制电路与电子电路的交接逻辑环节,它的功能是将110V控制电路的机车状态信号转换为低电平的逻辑信号,并输入到电子系统,但当控制电路提供错误的机车状态信号时,该输入输出电子电路无法进行识别,以致电子系统无法按正常的程序工作,本文就此提出改进意见.
介绍黑客行为的发展过程及对网络安全的威胁,提出在密码学技术、数字签名、防火墙、身份认证和在电子邮件及安全监控等方面防范黑客入侵的安全措施.
A new scheme of vector control for asynchronous motor is proposed.A new rotate flux observation is suggested,which is used in a typical vector control system designed in this paper.The vector control system is mod eled and simulated with MATLAB/SIMULINK software.
