内燃机车交流辅助传动系统的现状与发展

介绍了实现内燃机车交流辅助传动的几种方案,并分别就DF7E型调车机车、NJ1型交流传动机车、DF5改进型调车机车及6000马力(4300kW)交流传动机车的交流辅助传动系统进行了阐述,进而提出一种采用逆变器驱动的新型交流辅助传动方案。     

交流传动技术在机车辅助传动中的应用

主要论述了内燃机车的辅助传动采用交流传动的一般形式和控制方法,通过对比几种不同的辅助传动形式、结合HXN3型机车采用的基本技术,探讨辅助传动交流化发展的趋势。     

引进大功率交流传动内燃机车的选型

详细介绍了引进大功率交流传动内燃机车的选型过程,包括机车功率及辅助功率的确定、柴油机的选型、主传动和辅助传动方式的选择以及制动系统的选型;同时,研究和阐述了交流电传动矢量控制、微机网络控制及黏着控制的理论和观点。     

交流辅助发电机励磁调节器的设计

给出NJ1型交流传动内燃机车辅助发电机励磁调节器主电路及控制电路主要元器件的选择及确定.该调节器采用了新型电力半导体器件IPM.     

东风4DJ型交流传动内燃机车

全面介绍了我国第一台大功率交流传动客货运内燃机车的技术特性和结构特点,着重介绍了JF216主发电机,1TB2630牵引电动机、牵引变流器、辅助逆变器、辅助交流发电机等项装置.     

HX_N3B型交流传动调车机车辅助系统设计

阐述了4400马力交流传动调车机车辅助系统的原理、组成、部件结构、模块化设计。     

NJ2型机车的辅助交流传动系统

介绍了从美国GE公司引进的青藏铁路交流传动内燃机车的辅助传动系统,分析了其与国产车辅助交流传动系统的不同特点。     

东风4DJ型交流传动内燃机车

全面介绍了我国第一台大功率交流传动客货运内燃机车的技术特性和结构特点，着重介绍了JF216主发电机，1TB2630牵引电动机、牵引变流器、辅助逆变器、辅助交流发电机等项装置。     

内燃机车交流辅助传动逆变器的研制

介绍了内燃机车交流辅助传动逆变器电源的技术特点、工作原理及电路构成;还介绍了逆变器控制系统的设计、控制方法、过压过流保护以及逆变系统的试验、运行等内容.     

交流牵引电机型式试验平台的研究

现阶段我国轨道交通建筑已经开始大范围应用交流传动技术,对于交流传动设计工作来说,试验验证技术是一个十分重要的攻关环节.因此,本次研究专门设计了一套互馈式交流传动试验系统,该系统可以在实验室中对整套传动系统进行模拟,并在整个功率范围内针对系统组合和各个部件进行试验.     

From symmetric AC/AC to asymmetric AC/graphite,a progress in electrochemical capacitors

Graphitic carbon instead of activated carbon has been employed as the positive electrode material in the activated carbon (AC)/carbon capacitors using organic electrolytes. The advantageous electrochemical performance of the AC/graphite capacitors has been investigated as compared with the AC/AC capacitors. The charge storage mechanism of anions on the graphite positive electrodes in the AC/graphite capacitors has been studied by in situ XRD measurements.     

Performance of AC/graphite capacitors at high weight ratios of AC/graphite

The effect of negative to positive electrode materials’ weight ratio on the electrochemical performance of both activated carbon (AC)/AC and AC/graphite capacitors has been investigated, especially in the terms of capacity and cycle-ability. The limited capacity charge mode has been proposed to improve the cycle performance of AC/graphite capacitors at high weight ratios of AC/graphite.     

Development of Superconducting AC Generator

The superconducting ac generator is expected to be the optimum choice among ac generation systems in the future because of its reduced size, weight, high efficiency, and its contribution to stability of power systems and higher generator terminal voltage. Conceptual design on a 2P-1000MVA class superconducting ac generator has been completed to clarify problems and to confirm advantages. Fundamental studies are performed on key technologies that have to be solved for realization of superconducting generators. As a summary of those fundamental studies, a scaled-down superconducting generator of 3000kVA capacity is constructed and tested. Also clarified are effects of major design parameters for commercial superconducting ac generators such as dimensions, reactances, and weight.     

捷力型交流传动调车内燃机车

捷力型调车内燃机车是中国铁路机车车辆工业"九五"期间的重点科技项目之一.首台机车于1999年9月在四方机车车辆厂研制成功.该型机车的主要性能、结构参数如下.     

2100kW交流电传动内燃机车

介绍了2100kW交流传动内燃机车的总体布置、动力装置、控制系统及结构特点等.     

HEV battery heating using AC currents

A unique method has been developed for internally heating hybrid electric vehicle (HEV) batteries at cold temperatures using alternating current (AC). The poor performance of these batteries in cold climates is of major concern because they suffer a huge loss in capacity. Another symptom of this low performance is a dramatic increase in the series resistance of the battery, R_B, as the temperature drops. Experiments were performed with both low and high frequency heaters, and several tests were conducted on both lead acid and nickel metal hydride (NiMH) batteries at different AC amplitudes, states of charge (SOCs) and cold temperatures. Low frequency 60 Hz heating was first tested on several different 38 Ah lead acid batteries. The feasibility of using high frequency heating was then tested using a 10–20 kHz inverter on a pack of 6.5 Ah nickel metal hydride (NiMH) batteries. A technique also was developed to estimate the internal battery temperature, T_bat, by measuring the battery source resistance, R_B.