What is the principle of subway braking?

"subway braking" means subway braking. The principle of subway braking is divided into electric braking and air braking.

1. Electric braking

Electric braking is to achieve "braking" by braking the traction system. When the train is braking, the original traction motor is converted into a generator, which converts the kinetic energy of the train forward into electric energy, and the generated electricity is fed back to the original power supply system catenary.

2. Air braking

Air braking mainly uses compressed air to push the brake action, and pushes the brake shoe of the "brake pad" to be attached to the wheel for friction, thus consuming heat energy and realizing deceleration and parking. Electric braking is preferred in the braking process of subway trains, and when the train speed drops to a low level, air braking is used to supplement it.

Extended information

Precautions when braking in the subway:

1. When braking in the subway, pay attention to tighten the armrest or seat to prevent personal injury caused by physical relationship.

2. When braking in the subway, please don't drink drinks or eat bread and other foods to prevent choking or choking caused by braking impact.

3. When standing, you should hold the rings or posts tightly, and don't lean your hands or body against the screen door.

4. Please don't bend down to pick up things during the subway braking process to avoid accidents.

Baidu encyclopedia-subway brake

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