Brief introduction of maglev train:
Maglev train is a modern high-tech rail transit vehicle, which realizes non-contact suspension and guidance between the train and the track through electromagnetic force, and then draws the train by electromagnetic force generated by linear motor.
German engineer Herman Complin put forward the principle of electromagnetic levitation, and then applied for a patent. Since 1970s, with the strengthening of the economic strength of industrialized countries, Germany, Japan, the United States and other countries have successively carried out research and development of magnetic levitation transportation systems to improve their transportation capacity and meet the needs of their own economic development and people's lives. Among them, Germany and Japan have made great achievements.
Train kinetic energy:
"Normal-oriented" maglev train, the working principle of track and motor is exactly the same. Just arrange the "rotor" of the motor on the train and lay the "stator" of the motor on the track. Through the interaction between "rotor" and "stator", electric energy is converted into positive kinetic energy.
When the "stator" of the motor is electrified, the "rotor" can be driven to rotate through the action of current on the magnetic field. But the power consumption is huge, just like a motor covering the track. When electric energy is transmitted to the "stator" of the track, the train is driven to move linearly like the "rotor" of the motor through the action of current on the magnetic field.
Maglev train system;
1, propulsion system
The principle of synchronous linear motor is used to drive maglev train. The electromagnet coil supported on the lower part of the vehicle is equivalent to the excitation coil of the synchronous linear motor, and the three-phase moving magnetic field driving winding on the inner side of the ground track is equivalent to the armature and the long stator winding of the synchronous linear motor.
According to the working principle of the motor, when the armature coil as the stator is energized, the rotor of the motor is driven to rotate due to electromagnetic induction. Similarly, when the substations arranged along the line provide three-phase frequency modulation and amplitude modulation power to the driving windings inside the track, the bearing system and the train are pushed to do linear motion similar to the motor "rotor" due to electromagnetic induction.
2. Suspension system
At present, the design of suspension system can be divided into two directions, namely, the normal conduction type adopted by Germany and the superconducting type adopted by Japan. In terms of levitation technology, it is electromagnetic levitation system (EMS) and electromagnetic levitation system (EDS).
EMS is a kind of suction suspension system. The electromagnet combined on the locomotive and the ferromagnetic track on the guide rail repel each other to produce suspension. EDS) Use the magnet on the moving locomotive to generate current on the guide rail. As the gap between the locomotive and the guide rail decreases, the electromagnetic repulsion will increase, thus providing stable support and guidance for the locomotive.