Why are ordinary locomotives and carriages separated, while locomotives and carriages of high-speed trains are connected?

The power equipment of the ordinary train is on the locomotive, and there are only some braking devices in the car, so the ordinary locomotive and the car are separated, while the power equipment of the high-speed rail is in every car, and the locomotive head is only the control system of the power equipment.

Locomotive refers to a rail vehicle which is arranged at both ends of the train and has the function of controlling the train operation. Traditional locomotive is the main body of locomotive, which not only has traction device, but also has a series of control equipment, and the cab is used to adjust the main normal work of the whole train.

With the appearance of new trains, some trains no longer put the driving wheels in the locomotives, but all of them are installed in the middle carriages, such as China Fuxing train. There are also some trains without locomotives, only moving trains, and the comprehensive operation of trains is completely controlled by the dispatching center, such as Guangzhou APM line trains.

Extended data

Automobile power system

The power device of the handlebar is installed in each carriage in a decentralized way, so that it not only has traction, but also can carry passengers. EMU technology originated from subway, which is a kind of power dispersion technology. The ordinary train that everyone rides depends on locomotive traction, and the carriage itself has no power. This is a power concentration technology. On the other hand, trains with "multiple units" have their own power. When running, both the locomotive drive and the "self-running" make the power dispersed and achieve high-speed effect.

As a modern means of transportation suitable for short and medium-distance railway passenger transport, EMU can be divided into many types: EMU and diesel EMU according to transmission type; According to the form of power, it can be divided into centralized power and decentralized power; According to the transmission mode, it can be divided into electric transmission and hydraulic transmission.