Train braking system based on eddy current braking

Abstract

The embodiment of the invention discloses a train braking system based on eddy current braking. The train braking system comprises an eddy current cutting loop and N sets of eddy current braking systems, the eddy current braking system comprises braking control devices, an excitation power supply, an eddy current braking device and a first circuit breaker, wherein the excitation power supply is connected with the eddy current braking device through the first circuit breaker; the eddy current cutting loop comprises an interruption line and a state line, the interruption line is provided with N switches which are in one-to-one correspondence with the braking control devices, and when any switch is in an off state, the state line is in a power-off state; the first circuit breaker is used for disconnecting the excitation power supply and the eddy current braking device when the state line is in a power-off state; the braking control device is used for controlling the corresponding switch to be in an off state when the speed of the corresponding vehicle is lower than a preset value. According to the invention, the application safety of the eddy current braking device can be improved.

Description

technical field [0001] The invention relates to the technical field of train braking, in particular to a train braking system based on eddy current braking. Background technique [0002] When a large metal conductor is placed in an alternating magnetic field, the free electrons in the metal will be affected by the induced electromotive force generated by the changing magnetic field, thereby forming an eddy current in the metal, called eddy current. According to Lenz's law, it can be seen that the effect of the induced current is always against the cause of the induced current. The braking device designed according to this principle is eddy current braking. Linear eddy current braking uses the rail as a magnetic induction body, and installs a length bar magnet between the wheels on both sides of the bogie. The N and S poles of the magnet are arranged alternately, and a small vertical distance is maintained between the pole surface and the rail surface ( air gap). When the t...

AI Technical Summary

Problems solved by technology

[0011] 1. The speed of the single vehicle is used. Since the speed of the single vehicle is detected by the sensor, when the sensor of a certain vehicle in the train fails, the detected speed of the vehicle is inaccurate, which may lead to the removal of the eddy current brake of the vehicle. moving but not cut off, which may cause the electromagnet in the eddy current braking device of the car to rub against the rail, resulting in destructive consequences

[0012] 2. The cutting action only exists at the electrical command level, and does not cut off from the energy transmission path

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