阅读说明：本技术 一种用于高速列车的制动力可控永磁式涡流制动装置 (Permanent magnet eddy current brake device with controllable braking force for high-speed train ) 是由 金银锡 邹志龙 潘东华 孙芝茵 于 2019-10-08 设计创作，主要内容包括：本发明提供了一种用于高速列车的制动力可控永磁式涡流制动装置,属于高速列车涡流制动技术领域。本发明制动力可控永磁式涡流制动装置包括初级部分和次级部分,初级部分包括初级铁心和永磁体,永磁体安装在初级铁心上；次级部分包括次级背铁和闭合跑道形线圈,闭合跑道形线圈安装在次级背铁上,闭合跑道形线圈与可变电阻器串联形成一个涡流感应回路；初级部分与次级部分之间留有气隙。本发明提出一种制动力可控永磁式涡流制动器,通过可变电阻器调节每个闭合线圈回路的阻值,控制闭合跑道形线圈中感应出的涡流幅值,进而实现控制制动力的目的；本发明提出的涡流制动器,其初级部分与次级部分无物理接触、无摩擦、无磨损,使用寿命高、维护方便。(The invention provides a permanent magnet type eddy current brake device with controllable brake force for a high-speed train, and belongs to the technical field of eddy current braking of the high-speed train. The invention discloses a braking force controllable permanent magnet eddy current braking device which comprises a primary part and a secondary part, wherein the primary part comprises a primary iron core and a permanent magnet, and the permanent magnet is arranged on the primary iron core; the secondary part comprises a secondary back iron and a closed runway-shaped coil, the closed runway-shaped coil is installed on the secondary back iron, and the closed runway-shaped coil and the variable resistor are connected in series to form an eddy current induction loop; an air gap is left between the primary part and the secondary part. The invention provides a braking force controllable permanent magnet eddy current brake, which adjusts the resistance value of each closed coil loop through a variable resistor, controls the eddy current amplitude induced in a closed runway-shaped coil and further realizes the purpose of controlling the braking force; the vortex brake provided by the invention has the advantages that the primary part and the secondary part are not in physical contact, friction or abrasion, the service life is long, and the maintenance is convenient.)

1. The permanent magnet eddy current brake device with the controllable braking force for the high-speed train is characterized by comprising a primary part and a secondary part, wherein the primary part comprises a primary iron core (1) and a permanent magnet (2), and the permanent magnet (2) is arranged on the primary iron core (1); the secondary part comprises a secondary back iron (4) and a closed runway-shaped coil (3), the closed runway-shaped coil (3) is installed on the secondary back iron (4), and the closed runway-shaped coil (3) and a variable resistor are connected in series to form an eddy current induction loop; an air gap is left between the primary part and the secondary part.

2. The permanent magnet eddy current brake apparatus having controllable braking force for high speed train as claimed in claim 1, wherein the plurality of permanent magnets (2) are installed side by side on a primary iron core (1), the primary iron core (1) is fixedly installed at the bottom of the maglev train, the magnetizing direction of the permanent magnets (2) is perpendicular to the moving direction of the maglev train, and the polarities between the adjacent permanent magnets (2) are opposite.

3. The permanent magnet eddy current brake with controllable braking force for high-speed trains as claimed in claim 1, characterized in that the primary iron core (1) and the secondary back iron (4) are made of high-permeability magnetic materials.

4. The permanent magnet eddy current brake apparatus with controllable braking force for high-speed trains according to claim 1, wherein the secondary part comprises a secondary back iron (4) and a plurality of closed racetrack-shaped coils (3), the plurality of closed racetrack-shaped coils (3) are arranged on the secondary back iron (4) side by side, each closed racetrack-shaped coil (3) forms an eddy current induction loop with a variable resistor, and the braking force of the eddy current brake is controlled in real time by adjusting the resistance value of the variable resistor and adjusting the resistance value of each eddy current induction loop.

Technical Field

The invention relates to a linear eddy current brake applicable to the field of high-speed train braking, and belongs to the technical field of high-speed train eddy current braking.

Background

With the increasing improvement of national economy and people living standard, the demand of the modern society on fast, comfortable, safe and punctual traffic conditions is higher and higher. Therefore, the promotion and application of high-speed magnetic levitation trains or high-speed railway trains are inevitable trends. The braking system of the train is the guarantee for realizing the high-speed and safe operation of the train, and is directly related to the personal safety of passengers, so the requirement on the performance of the braking system is very strict.

At present, the braking of a high-speed train generally adopts a mode of combining electric braking and mechanical braking. The electric brake is used for controlling the slip frequency of the traction motor to enable the traction motor to work in a power generation mode so as to provide braking force; and the mechanical brake provides braking force through the friction force of the friction plate or the wearing plate. The electric braking mode is relatively complex to control, braking force cannot be provided under the condition that a traction motor control system fails, and the reliability is low; the mechanical braking friction plate has the disadvantages of huge loss, high maintenance and repair cost and excessive dependence on material performance.

As the most promising next generation high speed train braking mode, eddy current braking induces eddy currents in the conductor plates through the interaction of the primary magnetic field and the secondary conductor plates, which in turn interact with the primary magnetic field to generate braking force. The eddy current brake as a non-contact brake has the advantages of high brake force density, low noise, long service life, convenient maintenance and the like, and is an electromagnetic device very suitable for a high-speed train brake system

According to the difference of primary magnetic sources, the eddy current brake can be mainly divided into an electric excitation type eddy current brake and a permanent magnet type eddy current brake, an electric excitation structure can control the amplitude of braking force by adjusting exciting current, but the defects of small braking force density, large excitation loss and the like exist, in addition, the reliability is lower because the braking force cannot be provided or traffic accidents can be caused when the train is in unexpected power failure or the control system is in error. The permanent magnet type structure does not need an additional power supply, and has the advantages of compact structure, small volume and high reliability, but the braking force of the permanent magnet type structure is usually uncontrollable.

Disclosure of Invention

The invention aims to solve the problems in the prior art and further provides a braking force controllable permanent magnet eddy current brake device for a high-speed train.

The purpose of the invention is realized by the following technical scheme:

a braking force controllable permanent magnet eddy current brake device for a high-speed train comprises a primary part and a secondary part, wherein the primary part comprises a primary iron core and a permanent magnet, and the permanent magnet is arranged on the primary iron core; the secondary part comprises a secondary back iron and a closed runway-shaped coil, the closed runway-shaped coil is installed on the secondary back iron, and the closed runway-shaped coil and the variable resistor are connected in series to form an eddy current induction loop; an air gap is left between the primary part and the secondary part.

The invention relates to a permanent magnet eddy current brake device with controllable braking force for a high-speed train.

The invention relates to a braking force controllable permanent magnet type eddy current braking device for a high-speed train.

The invention relates to a permanent magnet eddy current brake device with controllable braking force for a high-speed train, wherein a secondary part comprises a secondary back iron and a plurality of closed runway-shaped coils, each closed runway-shaped coil and a variable resistor form an eddy current induction loop, and the resistance value of each eddy current induction loop is adjusted by adjusting the resistance value of the variable resistor, so that the braking force of an eddy current brake is controlled in real time.

The invention discloses a braking force controllable permanent magnet eddy current brake device for a high-speed train, and provides a braking force controllable permanent magnet eddy current brake.A secondary conductor of the brake device is composed of a plurality of closed runway-shaped coils, and each closed runway-shaped coil is connected with a variable resistor in series; based on the working principle of the eddy current brake, the resistance value of each closed coil loop is adjusted through the variable resistor, the eddy current amplitude induced in the closed runway-shaped coil is controlled, and the purpose of controlling the braking force is further achieved; the vortex brake provided by the invention has the advantages that the primary part and the secondary part are not in physical contact, friction or abrasion, the service life is long, and the maintenance is convenient.

Drawings

Fig. 1 is a three-dimensional model diagram of an eddy current brake according to a first embodiment.

Fig. 2 shows the primary part of an eddy current brake according to a first embodiment.

FIG. 3 shows a secondary part of an eddy current brake according to a first embodiment.

FIG. 4 is a circuit formed by a closed racetrack coil and a variable resistor

Fig. 5 is a three-dimensional model diagram of an eddy current brake according to a second embodiment.

Fig. 6 shows the primary part of an eddy current brake according to a second embodiment.

Fig. 7 shows a secondary part of an eddy current brake according to a second embodiment.

The reference numbers in the figures are: 1 is a primary iron core; 2 is a permanent magnet; 3 is a closed runway-shaped coil; 4 is back iron; and 5 is a primary adapter plate.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.