Electromagnetic magnetic rail brake and control method thereof

Abstract

The invention discloses an electromagnetic magnetic rail brake and a control method of the electromagnetic magnetic rail brake. 2n electromagnets distributed in the vertical direction of a rail at equal intervals are arranged between the rail and a vertical beam, each electromagnet respectively consists of a magnetic core and at least two groups of excitation coils, the excitation coils are arranged in the axial direction of the magnetic core and have the same winding modes, the adjacent two electromagnets sequentially form one pair, a closed work magnetic path is formed by each pair of electromagnets, the vertical beam, the rail, and air gaps between each pair of electromagnets and the rail, all of the closed work magnetic paths have loop directions in sequential arrangement at intervals in opposite directions, in addition, axial lines of the closed work magnetic paths are respectively vertical to the vertical direction of the rail, all excitation coils in one closed work magnetic path are respectively connected with the same excitation module, all of the excitation modules are respectively connected with an electronic control unit (ECU), two sets of power supply circuits with a storage battery connected in parallel with a contact network are adopted for control, high braking reliability of high-speed rail vehicles during the emergency braking can be ensured, and the rail vehicles can reliably stop through consuming little energy during the parking.

Description

technical field [0001] The invention relates to an electromagnetic magnetic rail brake and a control method for driving brake and parking and parking thereof, and belongs to the technical field of driving braking and parking and parking of rail vehicles. Background technique [0002] Magnetic rail braking technology is a new type of braking method developed in recent years to adapt to the popularization and high speed of rail vehicles. It mainly relies on the attraction of magnets and rails to generate sliding friction to decelerate rail vehicles. Magnetic rail braking technology mainly includes two types of braking: permanent magnet and electromagnetic. Since the permanent magnet track brake uses permanent magnets, it does not need to consume energy during braking except for manipulation. Compared with permanent magnetic track brakes, electromagnetic track brakes have the characteristics of large braking force, simple maintenance, and convenient operation. [0003] For ma...

AI Technical Summary

Problems solved by technology

On the basis of the above technical solutions, the patent application of Knorr-Bremse Rail Vehicle Systems Co., Ltd. "Magnetic rail brake device with asymmetric field coil and / or multi-piece coil" (application number 00880009381.2) , with an electromagnet supporting at least one field coil on a horseshoe-shaped core, its disadvantages are: because the field coil is wound on the horseshoe-shaped core, it leads to difficulty in arranging multiple coils, difficulty in maintenance, excessive volume and weight of the electromagnet

The electromagnetic magnetic track brake relying on the direct power supply of the catenary has the advantage of large braking force, but its disadvantage is that once accidents such as large-scale power failure of the power supply grid or lightning strikes occur, the catenary will lose power, which will further cause Causes the electromagnetic track brake to fail to work

Although the electromagnetic rail brake relying on the battery power supply has the advantages of high reliability, its disadvantages are: because the power supply voltage of the rail vehicle battery is generally 24 volts, which belongs to the low voltage range, and the excitation current density of the electromagnet is usually It is limited, for example: the allowable current density of the excitation coil for long-term work is 2~4 amperes / mm2; the allowable current density of the excitation coil for repeated short-time work is 5~12 amperes / mm2; The allowable current density of the coil is 13~30 amperes / mm2; in order to ensure the safety of the electromagnet excitation coil, it is recommended to use the allowable current density of the excitation coil of the long-term working system; therefore, under this small allowable current density and low excitation voltage, single An electromagnet excited by a wire will inevitably have a problem that the excitation ampere-turns is too small

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