Halbach array permanent magnet linear motor for railway wagons

Abstract

The utility model discloses a kind of Halbach array permanent-magnetic linear motor for railway freight car, belong to motor technical field, the utility model is provided with fixed frame top plate, it is hinged with lever;And core assembly, it is fixedly connected on fixed frame top plate, outer core is sleeved outside core assembly;Still include fixed frame bottom plate, it is fixedly connected with vehicle body, fixed frame bottom plate is fixedly connected with outer core, outer core inside is sequentially staggered with radial magnetization magnet and axial magnetization magnet, radial magnetization magnet includes several magnet split body, several magnet split body head-tail connection forms closed ring structure, the inner diameter of radial magnetization magnet and axial magnetization magnet and the outer diameter of core assembly gap fit;Wherein, the center axis of core assembly is detachably worn with several slot pieces, winding slot is formed between two adjacent slot pieces periphery, the utility model can convert the vertical vibration of freight car into electric energy, with the beneficial effect of improving power supply efficiency, guaranteeing vehicle operation safety.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a Halbach array permanent magnet linear motor for railway freight cars. Background Technology

[0002] Currently, the traditional methods for charging batteries in railway freight cars mainly include the following:

[0003] 1) Charging via engine: When the engine is running, the electrical energy it generates will be converted by the generator and delivered to the battery. When the engine starts, the generator will automatically charge the battery. To ensure the charging effect, the engine can be kept running at more than 2000 rpm for a period of time during driving.

[0004] 2) Using a charger: First, ensure that the charger's voltage and current match the battery's voltage and current. Then, connect one end of the charger to the positive terminal of the battery and the other end to the negative terminal. Next, plug the charger into a power outlet and adjust the charging current and voltage to appropriate values. Finally, wait for the charger to automatically complete the charging process.

[0005] 3) Emergency Start: If the truck battery is dead, it can be charged using an emergency power supply. Once the truck starts, it will automatically recharge the battery. Alternatively, an emergency start can be performed from another vehicle by jump-starting it. Connect the positive and negative terminals of the batteries of the two vehicles using a cable, start the vehicle with the power supply for about two minutes, and then start the truck with the dead battery. After running the truck for a while, the battery will gradually recharge.

[0006] Although the above methods can effectively ensure the normal operation of railway freight cars and the long-term use of batteries, with the continuous maturation of railway technology, railway freight cars are gradually developing towards centralization, heavy load, and high speed. For heavy-load trains, the wireless ECP braking system can control the air brake through electronic wireless signals, which is of great significance for improving the braking performance of the train. In practical applications, railway freight cars are frequently coupled and decoupled. In order to ensure that the electronic equipment of the wireless ECP braking system can work normally, each car needs to have its own backup power supply.

[0007] To improve the operation and braking performance of railway freight cars, railway workers both domestically and internationally have conducted extensive research on freight car power generation devices, proposing numerous power supply schemes, such as axle-end power generation devices, battery devices, pneumatic motor power generation devices, and vibration-based power generation devices. During operation, railway freight cars are subjected to forced vibration due to various irregularities on the track. By utilizing the vertical vibration characteristics of the freight car body, the relative motion between the stator and mover of a permanent magnet linear generator can be achieved, converting mechanical energy into electrical energy to power the electronic equipment of the wireless ECP braking system.

[0008] Therefore, in light of the above issues, it is necessary to provide a Halbach array permanent magnet linear motor for railway freight cars. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a Halbach array permanent magnet linear motor for railway freight cars, which can convert the vertical vibration of the freight car into electrical energy, thereby powering the wireless ECP braking system on the car, improving power supply efficiency, and ensuring the safe operation of the vehicle.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] This utility model discloses a Halbach array permanent magnet linear motor for railway freight cars, comprising:

[0012] The top plate of the fixed frame is hinged to the lever; and

[0013] The iron core assembly is fixedly connected to the top plate of the fixing frame, and an external iron core is sleeved on the outside of the iron core assembly; it also includes

[0014] A fixed frame base plate is fixedly connected to the vehicle body. The external iron core is fixedly connected to the fixed frame base plate. Radial magnets and axial magnets are sequentially and alternately installed inside the external iron core. The radial magnets include several magnet parts. The several magnet parts are connected end to end to form a closed ring structure. The inner diameters of the radial magnets and the axial magnets are clearance-fitted with the outer diameter of the iron core assembly.

[0015] The iron core assembly has several slot plates that can be detachably installed on its central shaft, and a winding slot is formed circumferentially between two adjacent slot plates.

[0016] Furthermore, the core assembly also includes a core, and the central shaft is fixedly connected to the core and a plurality of slot plates from top to bottom.

[0017] Furthermore, the iron core includes a first iron core and a second iron core;

[0018] The central holes of the first iron core and the second iron core are threaded to the top of the central shaft. The first iron core has multiple threaded holes around the central hole, which are threaded to bolts that pass through the connecting holes of the top plate of the fixing frame. The bottom of the central shaft is threaded to a positioning element.

[0019] Furthermore, the slotted plate includes a first slotted plate, a third slotted plate, and a plurality of second slotted plates disposed between the first slotted plate and the third slotted plate;

[0020] The first and second slot pieces have a boss formed on their lower surfaces with the central hole as the center, and the second and third slot pieces have a groove formed on their upper surfaces with the central hole as the center. The groove can engage with the boss of the adjacent slot piece.

[0021] Furthermore, the external iron core and the base plate of the fixed frame can be detachably and fixedly connected via a connecting rod.

[0022] Furthermore, the external iron core includes two first external iron cores and a second external iron core disposed between the two first external iron cores, as well as a connecting rod. The first external iron core and the second external iron core are evenly distributed with multiple through holes in the circumference, and the connecting rod passes through the through holes to fix the base plate of the fixing frame to the external iron core.

[0023] Furthermore, a slot is provided on the lower surface of the first external iron core to prevent the radial magnet and the axial magnet from detaching from the external iron core.

[0024] Furthermore, the second external iron core is a split structure, and multiple second external iron cores are stacked to increase the height of the external iron core.

[0025] Furthermore, the connecting rod is a double-ended screw.

[0026] Furthermore, the central shaft is a double-ended screw.

[0027] In the above technical solution, the Halbach array permanent magnet linear motor for railway freight cars provided by this utility model has the following advantages compared with the prior art:

[0028] This motor can be continuously installed on the vehicle to generate electricity without the need for external power input. The core assembly is built-in, meaning the permanent magnet is inside the motor, requiring minimal daily maintenance and allowing for complete maintenance and replacement. Furthermore, it utilizes the energy generated by the vibration of railway freight cars to convert into electrical energy, powering the wireless ECP braking system and ensuring vehicle operation safety. It does not consume other energy sources, making it energy-saving and environmentally friendly. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a front sectional view of the Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model.

[0031] Figure 2 This is a top view of the Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model;

[0032] Figure 3 This is a front view full sectional view of the Halbach array permanent magnet linear motor core assembly for railway freight cars disclosed in this utility model;

[0033] Figure 4 This is a front view of the top plate of the Halbach array permanent magnet linear motor mounting bracket for railway freight cars disclosed in this utility model;

[0034] Figure 5 This utility model discloses an isometric drawing of the core of a Halbach array permanent magnet linear motor for railway freight cars.

[0035] Figure 6 This is the isometric drawing of the first external iron core of the Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model;

[0036] Figure 7 This is an isometric view of the first slot of a Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model;

[0037] Figure 8 This is a front view of the second slot of the Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model;

[0038] Figure 9 This is a cross-sectional view AA of the second slot of the Halbach array permanent magnet linear motor for railway freight cars disclosed in this utility model;

[0039] Figure 10 This utility model discloses an isometric view of the radial magnetization magnet of a Halbach array permanent magnet linear motor for railway freight cars.

[0040] Figure 11 This is a front view of the base plate of the Halbach array permanent magnet linear motor mounting bracket for railway freight cars disclosed in this utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Top plate of the fixed frame; 2. Iron core; 2a. First iron core; 2b. Second iron core; 3. First external iron core; 31. Slot; 4. First slot plate; 5. Second slot plate; 6. Second external iron core; 7. Radial magnet; 8. Axial magnet; 9. Central shaft; 10. Third slot plate; 11. Bottom plate of the fixed frame; 12. Connecting rod; 13. Positioning component; 14. Winding slot. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0044] See Figure 1 , 2 As shown;

[0045] The utility model discloses a Halbach array permanent magnet linear motor for railway freight cars, comprising: a fixed frame top plate 1, an iron core assembly, an external iron core, a radially magnetized magnet 7, an axially magnetized magnet 8, and a fixed frame bottom plate 11;

[0046] The top plate 1 of the fixed frame is used for hinge connection with the lever. A core assembly is fixedly connected to the lower part of the top plate 1. The core assembly has a winding groove 14 formed circumferentially. The bottom plate 11 of the fixed base frame is used for connection with the vehicle body. Both the bottom plate 11 and the top plate 1 of the fixed base frame are provided with elongated connecting holes (such as...). Figure 4 , 11 (as shown);

[0047] The upper part of the base plate 11 of the fixed frame is fixedly connected to the bottom end of the external iron core. The external iron core can be sleeved on the outside of the iron core assembly. The outer iron core is equipped with radial magnets 7 and axial magnets 8 arranged alternately in sequence. The radial magnets 7 include several magnet parts, which are connected end to end to form a closed ring structure (e.g., Figure 10 As shown), the inner diameters of the radially magnetized magnet 7 and the axially magnetized magnet 8 are clearance-fitted with the outer diameter of the iron core assembly;

[0048] Among them, the central shaft 9 of the iron core assembly is detachably fitted with several slot plates, and a winding slot 14 is formed circumferentially between two adjacent slot plates. A winding composed of coils is provided in the winding slot 14.

[0049] See Figure 3 As shown:

[0050] The core assembly includes a central shaft 9, a core 2, slotted plates, and a positioning component 13;

[0051] Iron core 2 includes a first iron core 2a and a second iron core 2b;

[0052] The central holes of the first iron core 2a and the second iron core 2b are threaded to the top end of the central shaft 9. The first iron core 2a has multiple threaded holes (such as...) circumferentially located around the central hole. Figure 5 As shown), the bolts are threadedly connected to the connecting holes of the top plate 1 of the fixed frame through the screw holes. The central shaft 9 is located below the iron core 2 and has several slot pieces installed. The number of slot pieces can be selected according to the actual design requirements. The bottom end of the central shaft 9 is threadedly connected to a positioning piece 13 that presses the several slot pieces onto the central shaft 9, thereby fixing the position of the slot pieces and the winding slot 14 formed between two adjacent slot pieces. Specifically, the positioning piece 13 is a positioning block or nut with screw holes in the prior art.

[0053] During assembly, the first iron core 2a and the second iron core 2b are first threadedly connected to the central shaft 9 and locked in position. Then, several slot pieces are assembled and fixed to the central shaft 9 by the positioning piece 13. Finally, the base plate 11 of the fixing frame is fixed to the first iron core 2a by bolts.

[0054] See Figure 1 , 7 As shown in -9:

[0055] The slotted plate includes a first slotted plate 4, a third slotted plate 10, and a plurality of second slotted plates 5 disposed between the first slotted plate 4 and the third slotted plate 10;

[0056] Among them, the lower surfaces of the first slot plate 4 and the second slot plate 5 have protrusions formed around the central hole, which are used to separate adjacent slot plates so that the edges of the adjacent slot plates form winding slots 14. The upper surfaces of the second slot plate 5 and the third slot plate 10 have grooves formed around the central hole. The grooves can engage with the protrusions of the adjacent slot plates so that the first slot plate 4, the second slot plate 5 and the third slot plate 10 are coaxial.

[0057] See Figure 1 As shown:

[0058] The external iron core is constructed as a cylindrical structure with an internal cavity. The external iron core includes two first external iron cores 3, a second external iron core 6 disposed between the two first external iron cores 3, and a connecting rod 12. The first external iron cores 3 and the second external iron core 6 have multiple through holes evenly distributed circumferentially (e.g., ...). Figure 6 As shown), during assembly, the connecting rod 12 is fixedly connected to the base plate 11 of the fixed frame through the through hole. The connecting rod 12 is a double-headed screw in the prior art, and the bottom and top ends of the screw are threaded with fastening nuts.

[0059] Preferably, the lower surface of the first external iron core 3 is provided with a slot 31, which prevents the radial magnet 7 and the axial magnet 8 from detaching from the external iron core. The second external iron core 6 is a split structure, and multiple second external iron cores 6 are stacked to increase the height of the external iron core, thereby adapting to the iron core assembly. The number of second external iron cores 6 can be increased or decreased according to the number of slots on the central shaft 9 of the iron core assembly, thereby adjusting the overall height of the motor.

[0060] In the above technical solution, this utility model provides a Halbach array permanent magnet linear motor for railway freight cars, with the following working principle:

[0061] During installation, the motor is connected to the car body via a lever. One end of the lever is hinged to the car body, and the other end is hinged to the top plate 1 of the fixed frame. The top plate 1 of the fixed frame drives the movement of the iron core assembly. The bottom plate 11 of the fixed frame is used to connect to the car body. An external iron core fixed to the upper part of the bottom plate 11 is sleeved on the outside of the iron core assembly. The movement of the iron core assembly is determined by the vibration of the car body and the lever ratio. Assuming the lever ratio is 1:3, the end of the lever that is hinged to the car body is the lever input end, and the end of the lever that is hinged to the top plate 1 of the fixed frame is the lever output end. The lever fulcrum is installed at the empty / load valve bearing platform of the bogie. In order to enable the cover motor to generate electricity normally in both empty and loaded states, the iron core assembly needs to be lengthened by 150mm. In this way, when the main frequency of the vertical vibration of the car body is 3Hz and the amplitude is ±5mm, the lever mechanism can make the movement amplitude of the iron core assembly reach ±20mm while keeping the frequency constant. The motor's test voltage under a 10Ω load at a frequency of 3Hz and an amplitude of ±5mm is 3.04V. Therefore, the motor's voltage can reach 24.32V at a frequency of 3Hz and an amplitude of ±20mm, with a maximum power of 59.15W. This output power, after rectification and filtering, can meet the charging requirements of a 12V DC battery.

[0062] Compared with existing technologies, the Halbach array permanent magnet linear motor for railway freight cars has the following advantages: the motor can be continuously installed on the vehicle to generate electricity without the need for additional external power input, and the core assembly is built-in, meaning the permanent magnets are inside the motor, requiring minimal daily maintenance and allowing for complete maintenance and replacement. In addition, it utilizes the energy generated by the vibration of the railway freight car to convert into electrical energy to power the wireless ECP braking system, ensuring vehicle operation safety without consuming other energy sources, thus being energy-saving and environmentally friendly.

[0063] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A Halbach array permanent magnet linear motor for railway freight cars, characterized in that, include: The top plate of the fixed frame (1), which is hinged to the lever; and A core assembly, which is fixedly connected to the top plate (1) of the fixed frame, and an external core is sleeved on the outside of the core assembly; it also includes The fixed frame base plate (11) is fixedly connected to the vehicle body. The external iron core is fixedly connected to the fixed frame base plate (11). The external iron core is sequentially and alternately equipped with radial magnets (7) and axial magnets (8). The radial magnets (7) include several magnet parts. The several magnet parts are connected end to end to form a closed ring structure. The inner diameters of the radial magnets (7) and the axial magnets (8) are clearance-fitted with the outer diameter of the iron core assembly. The iron core assembly has a central shaft (9) through which several slot plates are detachably mounted, and a winding slot (14) is formed circumferentially between two adjacent slot plates.

2. The Halbach array permanent magnet linear motor for railway freight cars according to claim 1, Its characteristics are: The core assembly also includes a core (2), and the central shaft (9) is fixedly connected to the core (2) and several slot plates from top to bottom.

3. The Halbach array permanent magnet linear motor for railway freight cars according to claim 2, Its characteristics are: The iron core (2) includes a first iron core (2a) and a second iron core (2b); The central holes of the first iron core (2a) and the second iron core (2b) are threaded to the top of the central shaft (9). The first iron core (2a) has multiple threaded holes around the central hole, which are threaded to bolts that pass through the connecting holes of the top plate (1) of the fixing frame. The bottom of the central shaft (9) is threaded to a positioning element (13).

4. The Halbach array permanent magnet linear motor for railway freight cars according to claim 1 or 2, characterized in that... ； The slotted plate includes a first slotted plate (4), a third slotted plate (10), and a plurality of second slotted plates (5) disposed between the first slotted plate (4) and the third slotted plate (10); The first slotted piece (4) and the second slotted piece (5) have protrusions formed on their lower surfaces with the central hole as the center, and the second slotted piece (5) and the third slotted piece (10) have grooves formed on their upper surfaces with the central hole as the center. The grooves can engage with the protrusions of the adjacent slotted pieces.

5. The Halbach array permanent magnet linear motor for railway freight cars according to claim 1, characterized in that... ； The external iron core and the base plate (11) of the fixed frame can be detachably and fixedly connected by a connecting rod (12).

6. The Halbach array permanent magnet linear motor for railway freight cars according to claim 5, Its characteristics are: The external iron core includes two first external iron cores (3) and a second external iron core (6) disposed between the two first external iron cores (3), and a connecting rod (12). The first external iron core (3) and the second external iron core (6) are evenly distributed with multiple through holes in the circumference. The connecting rod (12) passes through the through holes to fix the base plate (11) of the fixing frame to the external iron core.

7. The Halbach array permanent magnet linear motor for railway freight cars according to claim 6, characterized in that... ； The lower surface of the first external iron core (3) is provided with a slot (31) to prevent the radial magnet (7) and the axial magnet (8) from disengaging from the external iron core.

8. The Halbach array permanent magnet linear motor for railway freight cars according to claim 7, Its characteristics are: The second external iron core (6) is a split structure, and multiple second external iron cores (6) are stacked to increase the height of the external iron core.

9. The Halbach array permanent magnet linear motor for railway freight cars according to claim 5, characterized in that... ； The connecting rod (12) is a double-ended screw.

10. The Halbach array permanent magnet linear motor for railway freight cars according to claim 1, characterized in that... ； The central shaft (9) is a double-ended screw.

Images