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运行中的SS3型电力机车常出现“无流无压”故障,导致列车区间频繁晚点,甚至途停,严重影响运输效能及客车正点率。为找出故障原因,杜绝机车“无流无压”故障隐患,提高机车调速能力,保证机车正常运输效能和运输秩序。用示波表等仪器对故障机车控制电路进行实际测试对比;用电路理论对机车控制电路进行计算分析;通过现场反复试验调整,把设计电路中R113阻值改为68 kΩ,增大了比例系数,提高了牵引特性控制指令最大输出电压。在119台SS3系列机车电路进行改进试验,历时一年多的运行结果表明:在100 km/h限速区段,牵引特性控制指令最大输出电压可达9.0 v以上,机车提速到95 km/h以上,未发生一起“无流无压”故障,故障率降为0%。
Running SS3 electric locomotive often appear “no flow no pressure ” failure, resulting in frequent delays in the train interval, or even stop, seriously affecting the transport efficiency and bus punctuality. To find out the cause of the malfunction, put an end to locomotive “no flow and no pressure ” hidden trouble, improve locomotive speed capability, to ensure the locomotive normal transport efficiency and transport order. Using oscilloscope and other equipment to test the actual control of the fault locomotive control circuit; using circuit theory to calculate and analyze the locomotive control circuit; through the field trial and error adjustment to the design circuit R113 resistance to 68 kΩ, increasing the proportionality coefficient , The maximum output voltage of traction control instruction is increased. The test results of 119 SS3 locomotive circuits were improved. The results of more than a year of operation showed that the maximum output voltage of the tractive characteristics control instruction was above 9.0 v at 100 km / h speed limit, and the locomotive speed increased to 95 km / h Above, did not happen together “no flow no pressure ” failure, the failure rate reduced to 0%.