目前，绝大多数城轨列车采用的常用制动方式为电空联合制动，但由于空气制动可控性较差和响应速度较慢等缺点，会带来停车不准、舒适度较差以及损耗较大等问题。如果能够将空气制动替换为电制动，则能克服这些问题。为了真正实现全电制动，并使其有取代空气制动的可能性，一方面，要满足全速域范围内的大转矩输出能力；另一方面，要保证低速下转速测量的准确性、转矩输出的可控性以及Jerk的控制效果。本文以全电制动的发展历程为基础，阐述了全电制动应用的现状以及需要克服的主要问题。从高速和低速两个角度切入，详细介绍了实现全电制动的难点问题及其所对应的解决思路，并针对每一个难点问题进行了总结，对其未来的发展方向进行了展望。

At present, the common braking method adopted by most urban rail trains is the electropneumatic braking. However, due to the disadvantages of poor controllability and slow response of air brakes, it will result in inaccurate parking and poor comfort. As well as issues such as greater loss, if you can replace air brakes with electric brakes, you can overcome these problems. In order to truly realize pure electric braking and make it necessary to replace air braking, on the one hand, it is necessary to satisfy the maximum torque output capability in the full-speed range as much as possible; on the other hand, it is necessary to ensure the accuracy of the speed measurement at low speeds. The controllability of the torque output and the control effect of the jerk have good performance. Based on the development history of pure electric brake, this paper expounds the status quo of pure electric brake application and the main problems to overcome. From the perspectives of high speed and low speed, the difficulties of pure electric brake and the corresponding problems are described in detail. The solution to the problem, and summarized for each difficult issue, and looked forward to the future development direction.

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国家重点研发计划资助-2022YFB4301202