城市轨道交通牵引与制动系统中的电磁学应用与技术实现

Applications and Technical Implementation of Electromagnetism in Traction and Braking Systems of Urban Rail Transit

摘要: 随着城市轨道交通朝着大运量、高密度以及短间隔方向发展，对于高效、可靠且节能的列车牵引与制动系统的需求日益增加。但目前部分传统系统受轮轨黏着极限、摩擦制动磨损以及能耗控制这些方面的制约，存在着动态响应不足、停车精度有限与制动能量浪费的问题。本研究焦点在电磁学原理在城市轨道交通牵引与制动方面的应用，探讨怎样借助电磁驱动、电磁制动以及电磁感应定位技术来优化列车核心装备性能。本文系统分析直线感应电机牵引、再生制动与涡流制动以及应答器电磁定位等关键技术，构建起基于电磁原理的牵引–制动协同控制模型与能耗数学模型，以有限状态机形式给出了制动力分配的动态协调逻辑，并通过仿真与缩比实验来验证其提升动态响应、降低机械磨损和实现精准停车的效果。仿真中进一步将所提PID + 前馈控制器与模型预测控制(MPC)从跟踪精度、抗扰动能力、能耗与实时性等维度进行了对比评估。研究发现，合理设计的电磁牵引制动系统可以显著提升列车的加减速性能以及能效比，从而为高密度运营条件下的快速、平稳、节能运行提供可靠的方案。本研究为城市轨道交通装备的电磁化设计提供了理论依据以及实践参考，对于推动轨道交通系统朝着更智能、绿色以及可持续的方向发展，有着积极的工程应用价值。

Abstract: With the development of urban rail transit toward high capacity, high density and short headway operation, the demand for efficient, reliable and energy-saving train traction and braking systems is growing continuously. Nevertheless, certain conventional systems are constrained by the wheel-rail adhesion limit, friction-braking wear and energy consumption control, which lead to insufficient dynamic response, limited stopping accuracy and waste of braking energy. Focusing on the applications of electromagnetic principles in the traction and braking of urban rail transit, this paper explores approaches to optimize the performance of core train equipment by adopting electromagnetic driving, electromagnetic braking and electromagnetic-induction positioning technologies. It systematically analyzes key technologies including linear induction motor (LIM) traction, regenerative and eddy-current braking, and balise-based electromagnetic positioning, establishes a traction-braking cooperative control model and an energy consumption mathematical model based on electromagnetic theories, formulates the dynamic coordination logic of braking force allocation as a finite state machine, and verifies their effects on improving dynamic response, reducing mechanical wear and realizing precise station stopping through simulations and scaled prototype experiments. In the simulations, the proposed PID-plus-feedforward controller is further compared with model predictive control (MPC) in terms of tracking accuracy, disturbance rejection, energy consumption and real-time performance. The research reveals that a properly designed electromagnetic traction-braking system can remarkably improve the acceleration/deceleration performance and energy efficiency ratio of trains, providing a reliable solution for rapid, smooth and energy-saving operation under high-density service conditions. This study offers theoretical foundations and practical references for the electromagnetic design of urban rail transit equipment, and bears positive engineering application value in advancing rail transit systems toward greater intelligence, sustainability and greenness.