黄淑婷论文.doc

摘要
铁路作为远距离、大容量、全天候的陆路交通工具,以其功率大、速度快、效率高、过载能力强、适应性好的特点被广泛受到重视。SS3B型电力机车是第二代机车技术产物SS3型的改进产品,技术有承前启后的必然,也有被取代的必要性。
随着我国经济的腾飞,我国铁路电气化发展很快,至1995年6月底,我国电气化铁路通车里程已达9597km,为适应牵引动力改革的技术发展,因而对SS3型电力机车按标准化、系列化要求进行了技术改进。改进后的韶山3型4000系电力机车(简称韶山3B型电力机车)。SS3B型电力机车它作为第二代电力机车的代表SS3型的改进型,采用了晶闸管不等分三段半控桥调压整流电路、前后转向架独立供电方式和电气轴重补偿;同时新的转向架采用了平拉杆牵引装置,使牵引点高度降低到460mm,从而减少了转向架的轴重转移,提高了机车的粘着利用;电阻制动改为加馈电阻制动,扩大了低速区最大恒制动力性能;具有恒流、准恒速特性控制和空转、滑行保护装置等。本文重点讨论SS3B型电力机车调压整流电路;SS3B型电力机车牵引电路和制动电路;SS3B型电力机车保护电路。
关键词:SS3B型电力机车;调压整流电路;牵引电路;制动电路;保护电路
Abstract
Railway long distance, large capacity, as all-weather land transport, with its big power, high speed, high efficiency, strong overload capacity, good adaptability are wide attention. Type SS3B electric otive is the second generation product of type otive technology improvement of technology products, past is inevitable, also be replaced by necessity.
Along with the economic development of our country, our country railroad electrification development is very rapid, to 1995the end of 6, our country electrified railway traffic mileage has reached 9597km, in order to adapt to the reform and technical development of traction power, the Shaoshan3 electric otive by standardization, series requirements for technological improvement. After the improvement of the Shaoshan3 type 4000 department electric otive ( referred to as the Shaoshan3B electric otive ). SS3B type electric otive as the second generation on behalf of SS3 type electric otive improved, use of the thyristor is divided into three sections of the half controlled bridge pressure regulating rectifier circuit, front and rear bogie independent supply mode and the electrical pensation; at the same time a new bogie adopts the flat rod pulling device, so that the traction height is reduced to 460mm, thereby reducing the bogie axle load transfer, enhanced otive adhesion utilization; resistance braking instead add feedback braking resistor, expanded the low-speed area maximum constant system dynamic pe