Inverted linear motor short primary and long secondary driving system

Abstract

The invention discloses an inverted linear motor short primary and long secondary driving system, and relates to the technical field of linear motor driving, and the system comprises a long secondary assembly which is installed on the lower surface of a top plate of an air track, and the air track is provided with a bogie matched with the air track; the short primary assembly is installed on the upper surface of the bogie, and the long secondary assembly and the short primary assembly are oppositely arranged; the cooling assembly is integrated on the short primary assembly and used for cooling the short primary assembly and the long secondary assembly; the short primary assembly and the cooling assembly are both in signal connection with the control unit. According to the inverted linear motor short primary and long secondary driving system, the technical effects of reducing the dead weight of the train and reducing the energy consumption are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motor driving, and in particular to an inverted linear motor short primary and long secondary driving system. Background Art

[0002] With the development and diversification of rail transit technology, linear motor vehicles can make up for the shortcomings of traditional rotating motor subway vehicles, especially when facing lines with large slopes and small radius curves.

[0003] In a traditional linear motor drive system configuration, a short primary is located beneath the bogie, while a long secondary induction plate is mounted on the ground, below the short primary. While this system meets basic operational requirements, it suffers from several significant drawbacks. First, the normal suction force generated between the primary and secondary during motor operation increases the vehicle's axle weight, leading to an increase in the vehicle's basic drag and, consequently, increased energy consumption. Second, because the direction of the normal suction force is the same as gravity, the interaction between the two requires increased suspension strength, which in turn increases material usage. Finally, existing technologies are suitable for ground-based linear motor vehicles and are difficult to directly apply to aerial rail (ART) linear motor vehicles, limiting their scope of application.

[0004] Therefore, how to provide an inverted installed linear motor short primary and long secondary drive system that effectively reduces the vehicle's own weight, reduces energy consumption, and is suitable for sky-rail linear motor trains is a technical problem that technical personnel in this field currently need to solve. Summary of the Invention

[0005] The purpose of the present invention is to provide an inverted linear motor short primary and long secondary drive system, which solves the technical problems of increased train energy consumption and weight caused by existing linear motor drives.

[0006] To achieve the above objectives, the present invention provides an inverted linear motor short primary and long secondary drive system, comprising:

[0007] A long secondary assembly is mounted on the lower surface of the top plate of the aerial track, and a bogie adapted therefor is provided on the aerial track;

[0008] a short primary assembly mounted on an upper surface of the bogie, the long secondary assembly and the short primary assembly being arranged opposite to each other;

[0009] a cooling assembly, integrated on the short primary assembly, for cooling the short primary assembly and the long secondary assembly;

[0010] A control unit is provided, and both the short primary assembly and the cooling assembly are connected to the control unit in a signal manner.

[0011] Preferably, the short primary assembly comprises:

[0012] case;

[0013] an iron core, the iron core being disposed in the shell;

[0014] A coil is wound on the iron core.

[0015] Preferably, the cooling assembly comprises:

[0016] Cooling fans, multiple cooling fans are arranged at the bottom of the shell, the interior of the shell is a cavity, the air outlet channels of the cooling fans are connected to the cavity, and both sides and the top of the shell in the length direction are provided with first air outlets connected to the cavity, which are used to cool the iron core and the coil.

[0017] Preferably, the cooling component also includes a second air outlet and a third air outlet, the second air outlet is arranged at the top of one side in the width direction of the shell, and the third air outlet is arranged at the bottom of the other side in the width direction of the shell, and the second air outlet and the third air outlet are used to achieve cooling of the long secondary component.

[0018] Preferably, exhaust holes are provided on both sides of the aerial track.

[0019] Preferably, each of the cooling fans is independently powered by a relay.

[0020] Preferably, a temperature sensor is provided on the coil, and the temperature sensor establishes a signal connection with the control unit.

[0021] Preferably, the short primary assembly is connected to the bogie via a suspension member.

[0022] Compared with the above-mentioned background technology, the present invention provides an inverted installed linear motor short primary and long secondary drive system, in which the short primary component is fixedly mounted on the upper surface of the bogie and is arranged opposite to the long secondary component. The short primary component and the long secondary component generate thrust to push the skyrail train forward, and the normal suction direction between the short primary component and the long secondary component is opposite to the direction of vehicle gravity, and can offset each other to reduce the vehicle axle weight, thereby effectively reducing the vehicle's own weight and reducing energy consumption. It is suitable for skyrail linear motor driven trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a short primary and long secondary drive system of an inverted linear motor provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram illustrating the operation of a long secondary assembly and a short primary assembly according to an embodiment of the present invention;

[0026] Figure 3 A side view of a housing provided by an embodiment of the present invention;

[0027] Figure 4 This is a front view of the shell provided by an embodiment of the present invention.

[0028] in:

[0029] 1-long secondary assembly, 2-aerial track, 3-bogie, 4-short primary assembly, 5-housing, 6-iron core, 7-coil, 8-cooling fan, 9-first air outlet, 10-second air outlet, 11-third air outlet, 12-exhaust hole, 13-temperature sensor, 14-suspension. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] See also Figure 1 、 Figure 2 The present invention provides an inverted linear motor short primary and long secondary drive system, which includes an aerial track 2, which is arranged on the track beam. The top of the aerial track train is provided with a bogie 3 that cooperates with the aerial track 2; a long secondary component 1, which is fixedly installed on the lower surface of the top plate of the aerial track 2; a short primary component 4, which is fixedly installed on the upper surface of the bogie 3, and the long secondary component 1 and the short primary component 4 are arranged opposite to each other; a cooling component, which is integrated in the short primary component 4 and is used to cool the short primary component 4 and the long secondary component 1; a control unit, and both the short primary component 4 and the cooling component establish signal connections with the control unit.

[0033] The long secondary assembly 1 is fixedly mounted on the lower surface of the top plate of the aerial track 2, and the short primary assembly 4 is fixedly mounted on the upper surface of the bogie 3, and is arranged opposite to the long secondary assembly 1. The short primary assembly and the long secondary assembly generate thrust to propel the aerial track train forward, and the normal suction direction between the short primary assembly 4 and the long secondary assembly 1 is opposite to the direction of the vehicle's gravity, and can offset each other to reduce the vehicle's axle weight.

[0034] Both the short primary assembly 4 and the cooling assembly establish signal connections with the control unit, which is responsible for receiving and processing signals from various components. According to the preset control strategy and algorithm, the power supply of each component and the vehicle running speed are controlled based on the operating status, temperature, working status of the short primary assembly 4, etc.

[0035] In summary, the present application provides an inverted installed linear motor short primary and long secondary drive system, in which the short primary component 4 is fixedly mounted on the upper surface of the bogie 3 and is arranged opposite to the long secondary component 1. The short primary component and the long secondary component generate thrust to push the skyrail train forward, and the normal suction direction between the short primary component 4 and the long secondary component 1 is opposite to the direction of vehicle gravity, and can offset each other to reduce the vehicle axle weight, thereby effectively reducing the vehicle's own weight and reducing energy consumption, which is suitable for skyrail trains.

[0036] Based on the above embodiments, see Figure 3 、 Figure 4 The short primary assembly 4 includes a shell 5 and an iron core 6 . The iron core 6 is disposed in the shell 5 ; the coil 7 is wound around the iron core 6 .

[0037] Based on the above embodiments, see Figure 3 and Figure 4 The cooling component includes a cooling fan 8, and multiple cooling fans 8 are arranged at the bottom of the shell. The interior of the shell is a cavity. The air outlet channel of the cooling fan 8 is connected to the cavity. Both sides and the top of the shell in the length direction are provided with a first air outlet 9 connected to the cavity for cooling the coil 7; the cooling component also includes a second air outlet 10 and a third air outlet 11. The second air outlet 10 is arranged at the top of one side in the width direction of the shell, and the third air outlet 11 is arranged at the bottom of the other side in the width direction of the shell. The second air outlet 10 and the third air outlet 11 are used to cool the long secondary component 1.

[0038] That is to say, the cooling fan 8 is arranged at the bottom of the shell and is an independent fan. It can generate a strong airflow, suck in the relatively low-temperature air from the outside, and form an airflow with a certain pressure and flow rate. The air outlet channel of the cooling fan 8 is connected to the cavity inside the shell, and can accurately guide the generated airflow into the shell cavity.

[0039] The cavity formed inside the shell plays the role of airflow distribution and buffering. After the cooling fan 8 sends the airflow into the cavity, the cavity can evenly distribute the airflow so that the airflow can flow to each air outlet more evenly. The first air outlet 9 is arranged on both sides and the top of the shell in the length direction, and is connected to the cavity, so that the cooling air can be blown to the coil 7 and the iron core 6 from multiple directions, thereby achieving comprehensive cooling of the coil 7 and the iron core 6. During the operation of the linear motor, the coil 7 and the iron core 6 will generate a large amount of heat. The cooling air blown out through the first air outlet 9 can quickly take away the heat on the surface of the coil 7 and the iron core 6, reduce the temperature of the coil 7 and the iron core 6, and ensure the normal working performance of the coil 7 and the iron core 6 and the operating efficiency of the motor.

[0040] The second air outlet 10 is arranged at the top of one side in the width direction of the shell, and the third air outlet 11 is arranged at the bottom of the other side in the width direction of the shell, so that the cooling air can cool the long secondary component 1 from different directions. Since the long secondary component 1 will also generate heat during the operation of the linear motor, the airflow blown out by the second air outlet 10 and the third air outlet 11 can directly act on the long secondary component 1, take away the heat generated by it, reduce the temperature of the long secondary component 1, ensure the stability of the electromagnetic performance of the long secondary component 1, and thus ensure the overall performance of the linear motor.

[0041] On the basis of the above embodiment, each cooling fan 8 is independently powered by a relay, so that when a single fan fails, the remaining fans can operate normally, thereby maintaining normal operation for a long time.

[0042] Based on the above embodiment, exhaust holes 12 are provided on both sides of the aerial track 2, so that the heat generated by the short primary component 4 and the long secondary component 1 is discharged into the interior of the aerial track 2, and the heated cooling gas is discharged through the exhaust holes on both sides.

[0043] Based on the above embodiment, the short primary assembly 4 is connected to the bogie 3 via the suspension member 14 .

[0044] Based on the above embodiment, a temperature sensor 13 is provided on the coil 7. The temperature sensor 13 can sense the temperature change of the coil 7 in real time and accurately, and establish a stable and reliable signal connection with the control unit to ensure that the temperature data can be transmitted to the control unit in a timely and accurate manner.

[0045] To facilitate hierarchical management and response to different temperature conditions, three temperature levels, A, B, and C, are set, satisfying the relationship A < B < C. In this embodiment, temperature levels A, B, and C are set to 160°C, 180°C, and 200°C, respectively (the actual setting values can be adjusted according to specific operating conditions and safety requirements).

[0046] The specific temperature response logic is as follows:

[0047] When the temperature reaches value A: When temperature sensor 13 detects that the temperature of coil 7 has reached temperature level A (160°C), the control unit rapidly processes this temperature signal and triggers the linear motor short circuit primary overtemperature alarm. At this point, the overtemperature alarm is clearly displayed on the vehicle's display interface to alert the operator to the current coil temperature. When the coil temperature drops below value A (160°C), the control unit automatically clears the overtemperature alarm and restores normal display.

[0048] When the temperature reaches value B: If the temperature of coil 7 continues to rise and reaches temperature level B (180°C), the control unit will also display an alarm message on the vehicle side indicating that the linear motor short primary is overheated, prompting the operator to pay close attention. At the same time, the control unit will activate the timer function to accurately record the overtemperature duration. If the overtemperature duration exceeds 30 minutes, to prevent irreversible damage to the linear motor short primary due to excessive temperature, the vehicle will automatically cut off the power supply to the linear motor short primary to ensure safe operation of the equipment.

[0049] When the temperature reaches C: When the temperature of Coil 7 rises sharply and reaches Temperature Level C (200°C), it indicates that the coil temperature is extremely dangerous. To prevent equipment damage and possible safety accidents, the vehicle will immediately cut off the power supply to the linear motor short primary, quickly stopping the linear motor operation to maximize the safety of equipment and personnel.

[0050] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0051] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An inverted linear motor short primary and long secondary drive system, characterized in that: include: A long secondary assembly (1) is mounted on the lower surface of the top plate of an aerial track (2), wherein the aerial track (2) is provided with a bogie (3) adapted therefor; A short primary assembly (4) is mounted on the upper surface of the bogie (3), and the long secondary assembly (1) and the short primary assembly (4) are arranged relative to each other; a cooling assembly, integrated on the short primary assembly (4), for cooling the short primary assembly (4) and the long secondary assembly (1); A control unit is provided, and the short primary component (4) and the cooling component are both connected to the control unit in a signal manner.

2. The inverted mounted linear motor short primary and long secondary drive system according to claim 1, characterized in that: The short primary assembly (4) comprises: housing (5); An iron core (6), the iron core (6) being arranged in the housing (5); A coil (7), wherein the coil (7) is wound on the iron core (6).

3. The inverted mounted linear motor short primary and long secondary drive system according to claim 2, characterized in that: The cooling assembly comprises: A cooling fan (8), wherein a plurality of cooling fans (8) are arranged at the bottom of the shell (5), the interior of the shell (5) is a cavity, the air outlet passages of the cooling fans (8) are connected to the cavity, and first air outlets (9) connected to the cavity are provided on both sides and the top of the shell (5) in the longitudinal direction, for cooling the iron core (6) and the coil (7).

4. The inverted mounted linear motor short primary and long secondary drive system according to claim 3, characterized in that: The cooling assembly further comprises a second air outlet (10) and a third air outlet (11), wherein the second air outlet (10) is arranged at the top of one side in the width direction of the shell (5), and the third air outlet (11) is arranged at the bottom of the other side in the width direction of the shell (5), and the second air outlet (10) and the third air outlet (11) are used to achieve cooling of the long secondary assembly (1).

5. The inverted mounted linear motor short primary and long secondary drive system according to claim 4, characterized in that: Exhaust holes (12) are provided on both sides of the aerial track (2).

6. The inverted mounted linear motor short primary and long secondary drive system according to claim 3, characterized in that: Each of the cooling fans (8) is independently powered via a relay.

7. The inverted mounted linear motor short primary and long secondary drive system according to claim 2, characterized in that: A temperature sensor (13) is provided on the coil (7), and the temperature sensor (13) establishes a signal connection with the control unit.

8. The inverted mounted linear motor short primary and long secondary drive system according to claim 2, characterized in that: The short primary assembly (4) is connected to the bogie (3) via a suspension member (14).

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