Excuse me, who gave the power to the EMU? Is there only power at the front and rear of the car or does every car have power? What about the high-speed rail?

Each section of a bullet train is called a bullet train, which has an independent power system. The front of the high-speed rail has only the control room, but there is no power. Together, it is called EMU.

Power devices are installed on each carriage in a scattered way, so that both traction and passengers can be carried. This kind of bus is called a bullet train. EMU consists of several self-powered vehicles and several unpowered vehicles. Powered vehicles are called motor trains, and unpowered vehicles are called trailer groups. EMU technology originated from subway, which is a kind of power dispersion technology.

Under normal circumstances, ordinary trains are towed by locomotives, and the carriages themselves do not have power, which belongs to 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.

Extended data:

Motor train principle:

Power is installed on the bogie of the motor car. A bogie has two wheelsets, each wheelset is driven by a motor. A motor car has two sets of such power bogies, namely four motors as driving force, and the whole car has sixteen driving wheel pairs. Compared with the traditional electric locomotive traction train (6-motor drive, co-co mode), this kind of locomotive has more power units.

On average, the driving force or propulsion power borne by each power unit is much lower than that of traditional locomotives, which saves electricity relatively. When the train set is started, one end of the train starts to give an instruction, and the motors distributed on each car are started by electricity to generate thrust, so the starting time of the whole car is short and the acceleration is fast. In terms of braking performance, the driver pulls down the brake handle and the whole vehicle brakes at the same time.

The braking distance of EMU is relatively short. Another difference is that the traditional locomotive axle is heavy because it needs a large starting torque, and its dead weight is generally around 100 ton, while the motor car does not need such a large starting torque because of its overall propulsion.

Therefore, the axle load is light, which makes the whole train set relatively light, which is conducive to improving the running speed and driving at high speed for a long time. Under normal circumstances, the center of gravity of bullet trains is lower than that of ordinary trains, so that bullet trains can obtain better high-speed stability performance.