Optimal Design of Medium-and-low Speed Maglev Train Levitation Sensor for Small Radius Curve

摘要

One of the most important features of medium-and-low speed maglev train is the ability to turn the small curve. When the train is in the small curve, as each levitation electromagnet module is a rigid structure, which cannot bend and deform, the electromagnet module and the F-shaped rail dislocate from each other, the levitation sensor installed on the end of the electromagnet module may also be offset from the center line of the F-shaped rail, which is more obvious especially on the curve of the smallest radius of 50m. If no measures are taken, the levitation sensor cannot provide accurate levitation gap. In the case that the levitation sensor deviates from the centerline of the F rail by 30mm, a mathematical model between the inductance of detecting coil and levitation gap is established, which provides an electromagnetic analysis method for F rail as the measured conductor and is used to optimize the parameters of the detection coil. Through the test, the results show that the levitation sensor can provide accurate levitation gap, which satisfies the requirement of levitation system, when the maglev train passes curves with 50m radius.