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全断面岩巷掘进机容量较大,掘进距离也较长,当刀盘主电动机直接启动时,往往引起其它控制电器设备跳闸,影响正常掘进。为了避免这种故障,除了采取增大供电主变压器容量或电缆截面,还可把控制方式从交流吸引和吸持改为交流吸引、直流吸持,或对吸引线圈电源增加稳压措施,但这均会使控制回路复杂。防止交流接触器跳闸的简易措施是,在允许范围内适当调整控制变压器的控制电压,在输出端增设抽头,如36V、40V、44V等,用转换开关转接。按电源电压波动情况
Full face rock tunnel boring machine capacity larger, boring distance is also longer, when the cutter main motor direct start, often lead to other control electrical equipment tripping, affecting normal driving. In order to avoid this kind of trouble, in addition to increasing the power supply main transformer capacity or cable cross-section, but also the control mode from AC to suction and suction to exchange to attract, DC hold, or to attract coil power supply increased voltage regulation measures, but Will make the control loop complicated. A simple measure to prevent the AC contactor from tripping is to adjust the control voltage of the control transformer properly within the allowable range and add taps to the output terminals such as 36V, 40V, 44V, etc., and use the changeover switch to switch over. Press the power supply voltage fluctuations