中低速磁浮列车传感器防浪涌设计及改进

为提高磁浮列车悬浮传感器的可靠性,分析在雷击、电源干扰等工况条件下的浪涌产生机理,确定浪涌冲击试验的内容,从通流量的角度说明已有防浪涌电路设计的可行性,并指出其在高温环境下在可靠性方面存在的不足。分别从降压和分流的角度进行分析,通过在原有电路中并接大容量电容的方式降低浪涌对敏感器件的冲击,从而提高传感器电源的抗浪涌冲击能力。

Design and Amelioration to Prevent Surge in Sensors of the Middle-low Velocity Maglev Train

The sensors gathering data of the suspension state of the electromagnet can be of real significance in the safety of the maglev train. Mechanism of surge under the local circumstance is analyzed; details of the surge experiment are confirmed. Feasibility of the existing design in preventing surge is explained at a point of current flow capacity view, and insufficiency of reliability under the local circumstance is pointed out. With a capacitance paralleling in front of the circuit, the surge is hindered, the impact to the latter components is reduced, and capability of the circuit to prevent surge is promoted.