A high-speed train seat steering device and control circuit

Abstract

The present invention discloses a seat steering device and a control circuit for a high-speed train. The control circuit includes a main circuit connected to an electromagnet coil. The main circuit includes a first branch and a second branch. The first branch and the second branch are respectively connected to the electromagnet coil and form closed loops with different current directions. The control circuit further includes a on-off control circuit for controlling the on-off of the first branch and the second branch, and the on-off control circuit is connected to the first branch and the second branch. By providing the first branch and the second branch and controlling their on-off through the on-off control circuit, the present invention can change the current direction of the electromagnet coil, enabling the electromagnet to move in different directions. It has the advantages of simple circuit structure, easy implementation, and low manufacturing cost.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed bullet trains, and specifically relates to a seat steering device and a control circuit for a high-speed bullet train. Background Art

[0002] The seats of high-speed multiple units need to be adjusted according to their traveling directions so that the seat orientations are consistent with the traveling direction of the multiple units. Since there are a large number of seats in the multiple units, if their orientations need to be adjusted, it is also necessary to identify the current orientations of the seats. To control the manufacturing and maintenance costs, motors or sensors cannot be used. Therefore, the existing seats of multiple units are of mechanical structures, and their steering actions mainly rely on manual labor. When the train needs to change its traveling direction, the train attendants need to spend a lot of time adjusting the seat orientations, which easily causes many inconveniences such as passenger congestion.

[0003] In view of this, the present invention is specifically proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a seat steering device and a control circuit for a high-speed bullet train, which can change the direction of the current in the electromagnet coil, have a simple circuit structure, and reduce costs.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:

[0006] A control circuit for a seat steering device of a high-speed bullet train includes a main circuit connected to an electromagnet coil. The main circuit includes a first branch and a second branch. The first branch and the second branch are respectively connected to the electromagnet coil and form closed loops with different current directions. The control circuit further includes a switching control circuit for controlling the on / off of the first branch and the second branch, and the switching control circuit is connected to the first branch and the second branch.

[0007] Preferably, the first branch includes a first power source. The positive pole of the first power source is connected to the first end of a control switch. The second end of the control switch is connected to the drain of a first field-effect transistor. The source of the first field-effect transistor is connected to the first end of the electromagnet coil. The second end of the electromagnet coil is connected to the drain of a third field-effect transistor. The source of the third field-effect transistor is connected to the negative pole of the first power source.

[0008] Preferably, the second branch includes a second field-effect transistor and a fourth field-effect transistor. The second end of the control switch is connected to the drain of the second field-effect transistor. The source of the second field-effect transistor is connected to the second end of the electromagnet coil. The first end of the electromagnet coil is connected to the drain of the fourth field-effect transistor. The source of the fourth field-effect transistor is connected to the negative pole of the first power source.

[0009] Preferably, the on-off control circuit includes a second power supply. The positive pole of the second power supply is connected to the conductive joint, the negative pole of the second power supply is connected to the first end of the first capacitor, the second end of the first capacitor is connected to the first conductive interface, the second end of the first capacitor is connected to the gates of the second field effect transistor and the fourth field effect transistor, and the sources of the second field effect transistor and the fourth field effect transistor are connected to the negative pole of the second power supply.

[0010] Preferably, the negative pole of the second power supply is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the second conductive interface, the second end of the second capacitor is connected to the gates of the first field effect transistor and the third field effect transistor, and the sources of the first field effect transistor and the third field effect transistor are connected to the negative pole of the second power supply.

[0011] Preferably, it includes a time-limited power-on device that can be automatically disconnected or turned on. The first end of the time-limited power-on device is connected to the second end of the control switch through a limit electromagnet, and the second end of the time-limited power-on device is connected to the negative pole of the first power supply.

[0012] Preferably, the time-limited power-on device includes a diode and a resistor-capacitor circuit. The positive pole of the diode is connected to the limit electromagnet, and the negative pole of the diode is connected to the negative pole of the first power supply through the resistor-capacitor circuit.

[0013] Preferably, the resistor-capacitor circuit includes a first resistor, a second resistor, and a third capacitor. The first end of the first resistor is connected to the negative pole of the diode, the second end of the first resistor is grounded through the second resistor, the second end of the first resistor is connected to the first end of the third capacitor, and the second end of the third capacitor is connected to the negative pole of the first power supply.

[0014] Another object of the present invention is to provide a high-speed train seat steering device having the control circuit as described above, including a fixedly arranged first magnetic unit and a second magnetic unit. The magnetic pole direction of the first magnetic unit is set opposite to that of the second magnetic unit. A first conductive interface is provided on the first magnetic unit, a second conductive interface is provided on the second magnetic unit. A third magnetic unit that is movable and has a variable magnetic pole direction is provided between the first magnetic unit and the second magnetic unit. A conductive joint is provided on the third magnetic unit. The third magnetic unit is connected to the rotating shaft of the seat through a transmission mechanism, and the coil of the third magnetic unit is connected to the main circuit.

[0015] Preferably, it includes a limit electromagnet, and the limit electromagnet is connected to the time-limited power-on device.

[0016] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

[0017] The present invention changes the direction of the current in the electromagnet coil by controlling the on-off of the field effect transistor, thereby changing the magnetic pole direction of the electromagnet, enabling the electromagnet to move in different directions, and having the advantages of simple circuit structure, easy implementation, and low manufacturing cost.

[0018] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0019] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic diagram of a seat steering device for a high-speed train of the present invention;

[0021] Figure 2 is a schematic diagram of the on-off control circuit of the present invention;

[0022] Figure 3 is a schematic diagram of the time-limited power-on device of the present invention;

[0023] Figure 4 is a schematic diagram of the connection between the seat and the steering device of a high-speed train of the present invention.

[0024] In the figure: 1, seat; 2, gear; 3, rack; 41, first magnetic unit; 42, second magnetic unit; 5, third magnetic unit; 6, limit electromagnet; 71, first resistor; 72, second resistor; 8, control switch; 9, first power supply; 10, time-limited power-on device; 111, first field-effect transistor; 112, second field-effect transistor; 113, third field-effect transistor; 114, fourth field-effect transistor; 12, second power supply; 131, first capacitor; 132, second capacitor; 133, third capacitor; 14, diode.

[0025] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] As Figure 1 shown, an embodiment of the present invention introduces a seat steering device for a high-speed train, which includes a fixedly arranged first magnetic unit 41 and a second magnetic unit 42. The magnetic pole directions of the first magnetic unit 41 and the second magnetic unit 42 are arranged in opposite directions. A third magnetic unit 5 that is movable and has a variable magnetic pole direction is provided between the first magnetic unit 41 and the second magnetic unit 42. The third magnetic unit 5 is connected to the rotating shaft of the seat 1 through a transmission mechanism.

[0030] The magnetic pole directions of the first magnetic unit 41 and the second magnetic unit 42 are fixed and unchanged, and the magnetic pole direction of the third magnetic unit 5 is variable. When the magnetic pole direction of the first magnetic unit 41 is the same as that of the third magnetic unit 5, an attractive force is generated between the first magnetic unit 41 and the third magnetic unit 5. At the same time, the magnetic pole direction of the third magnetic unit 5 is opposite to that of the second magnetic unit 42, and a repulsive force is generated between the third magnetic unit 5 and the second magnetic unit 42. The third magnetic unit 5 moves towards the first magnetic unit 41, and while the third magnetic unit 5 moves, it drives the seat 1 to rotate through the transmission mechanism.

[0031] When the magnetic pole direction of the first magnetic unit 41 is opposite to that of the third magnetic unit 5, a repulsive force is generated between the first magnetic unit 41 and the third magnetic unit 5. At the same time, the magnetic pole direction of the third magnetic unit 5 is the same as that of the second magnetic unit 42, and an attractive force is generated between the third magnetic unit 5 and the second magnetic unit 42. The third magnetic unit 5 moves towards the second magnetic unit 42, and while the third magnetic unit 5 moves, it drives the seat 1 to rotate through the transmission mechanism.

[0032] In the present invention, by making the magnetic pole direction of the third magnetic unit 5 variable, the third magnetic unit 5 can move back and forth between the first magnetic unit 41 and the second magnetic unit 42, and drive the seat 1 to rotate through a transmission mechanism, enabling the seat 1 to rotate in different directions, which can quickly complete the adjustment of the direction of the high-speed train seat 1, saving a large amount of human resources and reducing the cost of the steering device.

[0033] As Figure 1 and Figure 4 shown, the steering mechanism includes a rack 3 fixed on the third magnetic unit 5 and a gear 2 meshing with the rack 3. The center of the gear 2 is connected to the rotating shaft of the seat 1. When the third magnetic unit 5 moves, it drives the rack 3 to move, and at the same time, the gear 2 meshing with the rack 3 rotates, driving the seat 1 to rotate through the rotating shaft connected to the seat 1, completing the steering of the seat 1. The steering mechanism of the present invention has the advantages of simple structure, easy implementation, and low manufacturing cost.

[0034] In the embodiment of the present invention, the first magnetic unit 41, the second magnetic unit 42, and the third magnetic unit 5 are all strip-shaped electromagnets. The first magnetic unit 41, the second magnetic unit 42, and the third magnetic unit 5 are all connected to a control circuit. The current directions of the first magnetic unit 41 and the second magnetic unit 42 remain unchanged, and the current direction of the third magnetic unit 5 can be changed through the control circuit, thereby changing the magnetic pole direction of the third magnetic unit 5.

[0035] As Figure 1 shown, the embodiment of the present invention introduces a control circuit for a high-speed train seat steering device. The control circuit includes a main circuit connected to the coil of the third magnetic unit 5. The main circuit includes a first branch and a second branch. The first branch and the second branch are respectively connected to the electromagnet coil and form closed loops with different current directions. It also includes a on-off control circuit for controlling the on-off of the first branch and the second branch, and the on-off control circuit is connected to the first branch and the second branch.

[0036] In the present invention, the current direction of the third magnetic unit 5 is controlled through a control circuit. The control circuit is provided with a first branch and a second branch. The first branch is connected to the third magnetic unit 5 to form a first closed loop, and the second branch is connected to the third magnetic unit 5 to form a second closed loop. The current direction of the third magnetic unit 5 in the first closed loop is different from the current direction of the third magnetic unit 5 in the second closed loop. The on-off of the first branch and the second branch is controlled through the on-off control circuit to change the magnetic pole direction of the third magnetic unit 5, enabling the third magnetic unit 5 to move back and forth between the first magnetic unit 41 and the second magnetic unit 42, and enabling the seat 1 to rotate in different directions, which can quickly complete the adjustment of the direction of the high-speed train seat 1, saving a large amount of human resources and reducing the cost of the steering device.

[0037] As Figure 1As shown in the figure, in the embodiment of the present invention, the first branch includes a first power supply 9. The positive electrode of the first power supply 9 is connected to the first end of the control switch 8, the second end of the control switch 8 is connected to the drain of the first field effect transistor 111, the source of the first field effect transistor 111 is connected to the first end of the coil of the third magnetic unit 5, the second end of the coil of the third magnetic unit 5 is connected to the drain of the third field effect transistor 113, and the source of the third field effect transistor 113 is connected to the negative electrode of the first power supply 9.

[0038] The second branch includes a second field effect transistor 112 and a fourth field effect transistor 114. The second end of the control switch 8 is connected to the drain of the second field effect transistor 112, the source of the second field effect transistor 112 is connected to the second end of the coil of the third magnetic unit 5, the first end of the coil of the third magnetic unit 5 is connected to the drain of the fourth field effect transistor 114, and the source of the fourth field effect transistor 114 is connected to the negative electrode of the first power supply 9.

[0039] The first magnetic unit 41 and the second magnetic unit 42 are connected to the main circuit, and the first power supply 9 supplies power to the first magnetic unit 41 and the second magnetic unit 42 simultaneously.

[0040] After the control switch 8 is closed, the end of the first magnetic unit 41 facing the third magnetic unit 5 is an N pole, and the end of the second magnetic unit 42 facing the third magnetic unit 5 is an N pole. When the first branch is turned on, the end of the third magnetic unit 5 facing the second magnetic unit 42 is an N pole. An attractive force is generated between the third magnetic unit 5 and the first magnetic unit 41, and a repulsive force is generated between the third magnetic unit 5 and the second magnetic unit 42, and the third magnetic unit 5 moves toward the first magnetic unit 41. When the second branch is turned on, the end of the third magnetic unit 5 facing the first magnetic unit 41 is an N pole. A repulsive force is generated between the third magnetic unit 5 and the first magnetic unit 41, and an attractive force is generated between the third magnetic unit 5 and the second magnetic unit 42, and the third magnetic unit 5 moves toward the second magnetic unit 42.

[0041] As Figure 2 shown in the figure, in the embodiment of the present invention, the on-off control circuit includes a second power supply 12. The positive electrode of the second power supply 12 is connected to the conductive joint, the negative electrode of the second power supply 12 is connected to the first end of the first capacitor 131, the second end of the first capacitor 131 is connected to the first conductive interface, the second end of the first capacitor 131 is connected to the gates of the second field effect transistor 112 and the fourth field effect transistor 114, and the sources of the second field effect transistor 112 and the fourth field effect transistor 114 are connected to the negative electrode of the second power supply 12.

[0042] The negative electrode of the second power supply 12 is connected to the first end of the second capacitor 132. The second end of the second capacitor 132 is connected to the second conductive interface. The second end of the second capacitor 132 is connected to the gates of the first field-effect transistor 111 and the third field-effect transistor 113. The sources of the first field-effect transistor 111 and the third field-effect transistor 113 are connected to the negative electrode of the second power supply 12.

[0043] The conductive joint is arranged on the third magnetic unit 5, the first conductive interface is arranged on the first magnetic unit 41, and the second conductive interface is arranged on the second magnetic unit 42. During the movement of the third magnetic unit 5, the conductive joint can be respectively conducted with the first conductive interface and the second conductive interface.

[0044] Before the seat 1 turns, the first magnetic unit 41 fits with the third magnetic unit 5, and the conductive joint is conducted with the first conductive interface. At this time, the control switch 8 is in the off state. The second power supply 12 charges the first capacitor 131, and the gate voltages of the second field-effect transistor 112 and the fourth field-effect transistor 114 reach the turn-on threshold. After the control switch 8 is closed, the second field-effect transistor 112 and the fourth field-effect transistor 114 are turned on, the second branch is conducted, and the third magnetic unit 5 moves towards the second magnetic unit 42. During the movement of the third magnetic unit 5 towards the second magnetic unit 42, the first capacitor 131 provides the turn-on voltage for the second field-effect transistor 112 and the fourth field-effect transistor 114 to turn on the second field-effect transistor 112 and the fourth field-effect transistor 114. After the third magnetic unit 5 moves to the second magnetic unit 42, the seat 1 has completed the turn, and the control switch 8 is disconnected.

[0045] After the seat 1 has completed the turn, the third magnetic unit 5 moves to the second magnetic unit 42, the conductive joint is conducted with the second conductive interface, and the control switch 8 is in the off state. The second power supply 12 charges the second capacitor 132, and the gate voltages of the first field-effect transistor 111 and the third field-effect transistor 113 reach the turn-on threshold. After the control switch 8 is closed, the first field-effect transistor 111 and the third field-effect transistor 113 are turned on, the first branch is conducted, and the third magnetic unit 5 moves towards the first magnetic unit 41. During the movement of the third magnetic unit 5 towards the first magnetic unit 41, the second capacitor 132 provides the turn-on voltage for the first field-effect transistor 111 and the third field-effect transistor 113 to turn on the first field-effect transistor 111 and the third field-effect transistor 113. After the third magnetic unit 5 moves to the first magnetic unit 41, the seat 1 has completed the turn, and the control switch 8 is disconnected.

[0046] When the seat 1 does not need to be steered, the second power supply 12 charges the first capacitor 131 and the second capacitor 132. When the seat 1 needs to be steered, the first capacitor 131 provides the turn-on voltage for the second field effect transistor 112 and the fourth field effect transistor 114, and the second capacitor 132 provides the turn-on voltage for the first field effect transistor 111 and the third field effect transistor 113. The direction of the current in the third magnetic unit 5 can be changed arbitrarily, enabling the third magnetic unit 5 to move back and forth between the first magnetic unit 41 and the second magnetic unit 42, and allowing the seat 1 to rotate in different directions.

[0047] As Figure 1 shown, the embodiment of the present invention includes a time-limited power-on device 10 that can be automatically disconnected or conducted. The first end of the time-limited power-on device 10 is connected to the second end of the control switch 8 via the limit electromagnet 6, and the second end of the time-limited power-on device 10 is connected to the negative pole of the first power supply 9.

[0048] As Figure 3 shown, the time-limited power-on device 10 includes a diode 14 and a resistor-capacitor circuit. The positive pole of the diode 14 is connected to the limit electromagnet 6, and the negative pole of the diode 14 is connected to the negative pole of the first power supply 9 via the resistor-capacitor circuit.

[0049] The resistor-capacitor circuit includes a first resistor 71, a second resistor 72, and a third capacitor 133. The first end of the first resistor 71 is connected to the negative pole of the diode 14. The second end of the first resistor 71 is grounded via the second resistor 72. The second end of the first resistor 71 is connected to the first end of the third capacitor 133, and the second end of the third capacitor 133 is connected to the negative pole of the first power supply 9.

[0050] The first magnetic unit 41, the second magnetic unit 42, and the third magnetic unit 5 are all strip-shaped electromagnets. The first magnetic unit 41, the second magnetic unit 42, and the third magnetic unit 5 have the same size and are arranged horizontally and coaxially. The limit electromagnet 6 is also a horizontally arranged strip-shaped electromagnet, and the axis of the limit electromagnet 6 is perpendicular to the axis of the third magnetic unit 5. The distance between the limit electromagnet 6 and the first magnetic unit 41 is equal to the length of the third magnetic unit 5, and the distance between the limit electromagnet 6 and the second magnetic unit 42 is equal to the length of the third magnetic unit 5. One end of the limit electromagnet 6 is connected to a metal plate through a spring. When the seat 1 is not steered, the limit electromagnet 6 adheres to one end of the third magnetic unit 5, preventing the third magnetic unit 5 from moving and keeping the direction of the seat 1 unchanged.

[0051] After the control switch 8 is closed, the limit electromagnet 6 is energized, and an attractive force is generated between the limit electromagnet 6 and the metal plate. The limit electromagnet 6 compresses the spring and moves towards the metal plate, and the limit electromagnet 6 can no longer prevent the third magnetic unit 5 from moving. The energization time of the time-limited energization device 10 is less than the moving time of the third magnetic unit 5. After the third magnetic unit 5 finishes moving, the attractive force between the limit electromagnet 6 and the metal plate disappears, and the limit electromagnet 6 resets under the action of the spring force to prevent the third magnetic unit 5 from continuing to move.

[0052] After the control switch 8 is closed, the positive voltage of the diode 14 is greater than the negative voltage of the diode 14, and the first power supply 9 charges the third capacitor 133 in the time-limited energization device 10. At this time, the time-limited energization device 10 is turned on, and an attractive force is generated between the limit electromagnet 6 and the metal plate. The limit electromagnet 6 compresses the spring and moves towards the metal plate. After the third capacitor 133 is charged for a period of time, the negative voltage of the diode 14 is greater than the positive voltage of the diode 14, the diode 14 is turned off, the time-limited energization device 10 is powered off, the attractive force between the limit electromagnet 6 and the metal plate disappears, and the limit electromagnet 6 returns to its original position under the action of the spring force.

[0053] In the present invention, by setting the limit electromagnet 6, when the seat 1 does not need to turn, the limit electromagnet 6 prevents the third magnetic unit 5 from moving and keeps the direction of the seat 1 unchanged. When the seat 1 needs to turn, after the limit electromagnet 6 is energized, it compresses the spring and moves towards the metal plate, allowing the third magnetic unit 5 to move and drive the seat 1 to turn. Since the energization time of the time-limited energization device 10 is less than the moving time of the third magnetic unit 5, after the third magnetic unit 5 finishes moving, the time-limited energization device 10 has been powered off, and the limit electromagnet 6 returns to its original position under the action of the spring force to prevent the third magnetic unit 5 from continuing to move and keep the direction of the seat 1.

[0054] In the specification provided herein, a large number of specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure an understanding of this description.

[0055] Except that at least some of such features and / or processes or units are mutually exclusive, any combination may be employed of all the features disclosed in this specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or apparatus so disclosed. Each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

[0056] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments is meant to be within the scope of the present invention and forms different embodiments.

[0057] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above in its preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A control circuit for a seat steering device of a high-speed train, characterized in that, It includes a main circuit connected to an electromagnet coil. The main circuit includes a first branch and a second branch. The first branch and the second branch are respectively connected to the electromagnet coil and form closed loops with different current directions. It also includes a switching control circuit for controlling the on / off of the first branch and the second branch. The switching control circuit is connected to the first branch and the second branch; The first branch includes a first power supply. The positive pole of the first power supply is connected to the first end of the control switch. The second end of the control switch is connected to the drain of the first field-effect transistor. The source of the first field-effect transistor is connected to the first end of the electromagnet coil. The second end of the electromagnet coil is connected to the drain of the third field-effect transistor. The source of the third field-effect transistor is connected to the negative pole of the first power supply; It also includes a time-limited power-on device that can automatically disconnect or conduct. The first end of the time-limited power-on device is connected to the second end of the control switch through a limit electromagnet. The second end of the time-limited power-on device is connected to the negative pole of the first power supply. The time-limited power-on device includes a diode and a resistor-capacitor circuit. The positive pole of the diode is connected to the limit electromagnet. The negative pole of the diode is connected to the negative pole of the first power supply through the resistor-capacitor circuit; One end of the limit electromagnet is connected to a metal plate through a spring. The power-on time of the time-limited power-on device is less than the seat turning time. After the seat turning is completed, the attraction between the limit electromagnet and the metal plate disappears. The limit electromagnet resets under the action of the spring force to prevent the seat from continuing to turn.

2. The control circuit of a high-speed train seat steering device according to claim 1, characterized in that The second branch includes a second field-effect transistor and a fourth field-effect transistor. The second end of the control switch is connected to the drain of the second field-effect transistor. The source of the second field-effect transistor is connected to the second end of the electromagnet coil. The first end of the electromagnet coil is connected to the drain of the fourth field-effect transistor. The source of the fourth field-effect transistor is connected to the negative pole of the first power supply.

3. The control circuit of a high-speed train seat steering device according to claim 2, characterized in that, The switching control circuit includes a second power supply. The positive pole of the second power supply is connected to a conductive joint. The negative pole of the second power supply is connected to the first end of the first capacitor. The second end of the first capacitor is connected to the first conductive interface. The second end of the first capacitor is connected to the gate of the second field-effect transistor and the gate of the fourth field-effect transistor. The source of the second field-effect transistor and the source of the fourth field-effect transistor are connected to the negative pole of the second power supply.

4. The control circuit of a high-speed train seat steering device according to claim 3, characterized in that, The negative pole of the second power supply is connected to the first end of the second capacitor. The second end of the second capacitor is connected to the second conductive interface. The second end of the second capacitor is connected to the gate of the first field-effect transistor and the gate of the third field-effect transistor. The source of the first field-effect transistor and the source of the third field-effect transistor are connected to the negative pole of the second power supply.

5. The control circuit of a high-speed train seat steering device according to claim 1, characterized in that, The resistor-capacitor circuit includes a first resistor, a second resistor, and a third capacitor. The first end of the first resistor is connected to the negative pole of the diode. The second end of the first resistor is grounded through the second resistor. The second end of the first resistor is connected to the first end of the third capacitor. The second end of the third capacitor is connected to the negative pole of the first power supply.

6. A high-speed train seat steering device having the control circuit according to any one of claims 1-5 above, characterized in that It includes a fixedly arranged first magnetic unit and a second magnetic unit. The magnetic pole direction of the first magnetic unit is set opposite to that of the second magnetic unit. A first conductive interface is provided on the first magnetic unit, and a second conductive interface is provided on the second magnetic unit. A third magnetic unit that is movable and has a variable magnetic pole direction is provided between the first magnetic unit and the second magnetic unit. A conductive joint is provided on the third magnetic unit. The third magnetic unit is connected to the rotating shaft of the seat through a transmission mechanism. The coil of the third magnetic unit is connected to the main circuit.

7. The steering device for the seat of a high-speed train according to claim 6, characterized in that, It includes a limit electromagnet, and the limit electromagnet is connected to a time-limited power-on device.

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