A multi-stage reconnected electromagnetic propulsion device with low thrust pulsation and its power supply and control method

Abstract

This invention provides a low-thrust pulsation multi-stage reconnected electromagnetic propulsion device and its power supply control method, including two rows of stator coils, a mover plate embedded with multiple metal plates, a mover mechanism, and a stator power supply device; the two rows of stator coils are fixed in parallel on a stationary base, with each pair of stator coils arranged coaxially facing each other; the metal plates are embedded in the mover plate, which is fixed to the mover mechanism, located between and parallel to the two rows of stator coils, with the center of the metal plate and the axis of the two rows of stator coils on the same plane; the load is connected to the mover mechanism through a connecting mechanism; each row of stator coils is evenly spaced along the propulsion direction; multiple metal plates are evenly spaced along the propulsion direction on the mover plate; a pulse current is supplied to the stator coils through the stator power supply device, and the metal plates are subjected to a controllable and powerful thrust, causing the mover mechanism to move at high speed in the direction of the force. This electromagnetic propulsion device is suitable for propelling high-speed motion of moving bodies within different speed ranges.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic propulsion, specifically to a multi-stage reconnected electromagnetic propulsion device with low thrust pulsation and its power supply control method. Background Technology

[0002] Currently, rockets remain the mainstream high-speed propulsion system. Although rocket fuel can continuously provide enormous thrust, the specific thrust of conventional fuel rockets is limited due to the chemical properties of the fuel. While nuclear fuel can provide a very high specific thrust, its components are also very heavy. Rocket propulsion systems suffer from drawbacks such as high launch costs and technological complexity.

[0003] Electromagnetic launchers can convert electromagnetic energy into kinetic energy by doing work with electromagnetic force, and their theoretical exit velocity is much greater than that of rocket propulsion. In 1989, Cowen et al. in the United States proposed the concept of a reconnection electromagnetic launcher and applied for a US patent "MAGNETIC RECONNECTION LAUNCHER, Patent Number: US4817494". The reconnection electromagnetic launcher is a special type of induction coil electromagnetic launcher. It not only retains the advantage of coil guns in releasing huge energy in a short time, but also overcomes the disadvantages of rail wear and material ablation due to non-contact launch. At the same time, its energy loss in the non-propulsion direction is very small. Therefore, it has extremely high application value in artillery shell launching, electromagnetic catapults, and rail trains.

[0004] Traditional multi-stage pulse coil driven reconnection electromagnetic launchers, also known as multi-stage reconnection guns, generate pulsed thrust due to the long interval between adjacent pulse currents. Furthermore, they generate resistance when the coil current decreases because the current cannot be switched off in time, resulting in very low efficiency. Such reconnection electromagnetic launchers are only suitable for applications with short strokes, high speeds, and narrow speed ranges, and are not suitable as long-distance continuous electromagnetic propulsion devices.

[0005] The literature “Zhang Cheng, Zhou Wenxiang, Li Tiantian, et al. Design and optimization of drive scheme for ultra-high-speed experimental vehicle [J]. Journal of Railway Science and Engineering, 2013, 10(6): 109-115” describes the design of a multi-stage reconnecting gun applied to an ultra-high-speed experimental vehicle. This design improves the motion characteristics of the reconnecting electromagnetic launch and increases the launch efficiency by rationally allocating drive units and optimizing the drive circuit scheme. However, the thrust generated by the propulsion device in this design is still in the form of a strong pulse, with very low efficiency, large thrust abrupt changes and certain intervals, making it difficult to ensure the stability of the moving body structure and unsuitable for long-distance propulsion.

[0006] The literature “Guo Fang, Tang Yuejin, Ren Li, Li Jingdong. Fundamental research on continuous pulse magnetic traveling wave electromagnetic launch based on interlaced coil layout [J]. Proceedings of the CSEE, 2010, 30(27): 123-128” describes a multi-stage reconnector that emits continuous thrust. The main feature of this device is that by arranging the pulse coils in an interlaced manner, continuous pulse magnetic traveling waves are generated in time and space, increasing the duration of each thrust stage and shortening the pulse thrust interval, thereby improving the launch efficiency. However, due to the asymmetrical magnetic field distribution on both sides of the secondary metal plate, the vertical forces on the two surfaces of the secondary cannot be canceled out. Although the literature prevents the propulsion direction from deviating by adding a set of symmetrical drivers, it cannot solve the problem of the secondary being twisted and deformed due to the continuous uneven pulsed vertical force. At the same time, the coil is also prone to twisting and deformation due to the asymmetrical reaction force.

[0007] Chinese patent application “Dong Liang, Liu Jing, Xie Huajun. Multi-wing reconnected electromagnetic propulsion device for train drive and its usage method [P]. Sichuan: CN108407824A, 2018-08-17” discloses a multi-wing reconnected electromagnetic propulsion device for train drive, which is a manually controlled discontinuous auxiliary acceleration device.

[0008] Chinese patent application “Cheng Peng, Wang Xiaochao, Lan Hai, Li Weili, Wang Mingdi, Liu Kuo, Han Xiaoqian, Cheng Qian, Li Ruiye. A power unit and power driving method suitable for four-wheel drive electric vehicles [P]. Heilongjiang: CN108674197A, 2018-10-19” discloses a technology for applying electromagnetic reconnection technology to an automotive power unit. This device achieves electromagnetic drive in the form of reciprocating linear motion through a single-stage reconnection cannon, which is then converted into the circular motion of the wheels through a mechanical device. This device provides efficient driving force for four-wheel drive electric vehicles, but the propulsion method is wheel rolling, making it unsuitable for high-speed applications.

[0009] It is known that, in existing technical solutions, although multi-stage reconnected electromagnetic propulsion devices can generate short-interval pulse thrust through circuit optimization, the force on the moving body is still not continuous. While staggered coil arrangements can generate continuous thrust, the system has low structural stability and is unsuitable for engineering applications. Converting the reconnection effect into rotational force can achieve long-distance drive, but wheel drive is not suitable for high-speed applications. Summary of the Invention

[0010] To apply reconnected electromagnetic launchers to electromagnetic propulsion systems, this invention proposes a low-thrust-pulsation multi-stage reconnected electromagnetic propulsion device and its power supply control method. This invention designs a novel multi-stage reconnected electromagnetic launch system arrangement and its power supply device, ensuring continuous and stable thrust on the moving body, making it particularly suitable for continuous high-thrust propulsion of the moving body within a short time and at different speed ranges. Simultaneously, the mover metal plate exhibits more uniform heating, significantly improving operational reliability and efficiency.

[0011] The technical solution adopted by this invention to solve the technical problem is as follows:

[0012] A low-thrust pulsation, multi-stage reconnected electromagnetic propulsion device includes two rows of stator coils, a mover plate embedded with n metal plates, a mover mechanism, and a stator power supply device. The two rows of stator coils are fixed in parallel on a stationary base, with each pair of stator coils arranged coaxially facing each other. Two stator coils arranged face-to-face form a stator coil group, and the axes of the stator coils lie on the same plane. Metal plates are embedded in the mover plate, which is fixed to the mover mechanism. The mover plate is located between and parallel to the two rows of stator coils, and the center of the metal plate lies on the same plane as the axes of the two rows of stator coils. The load is connected to the moving mechanism through a connecting mechanism. Each row of stator coils is evenly spaced along the advancing direction. The axial distance between adjacent stator coil groups is p. There are a total of m stator coil groups, where m ≥ 2n is a positive integer. n metal plates are evenly spaced along the advancing direction on the moving plate. The distance between the centers of adjacent metal plates is q, where p < q < 2p. Each group of stator coils is equipped with a corresponding power supply device. The pulse current supplied to each group of stator coils is set by the stator power supply device, and the current is controlled according to the position of the moving plate to advance the moving plate.

[0013] Furthermore, the n metal plates are non-magnetic, highly conductive materials, including aluminum alloys.

[0014] Furthermore, the stator coils are circular or racetrack-shaped, and the stator coils are modularly packaged to form a stator array.

[0015] Furthermore, the metal plate is a circle with the same diameter as the stator coil, or an external rectangle of a circle with the same diameter as the stator coil, or an irregular shape formed by combining a semicircle with the same diameter as the stator coil and a rectangle whose long side coincides with the diameter of the semicircle and whose long side is twice the length of the short side.

[0016] Furthermore, the metal plates are evenly embedded in the moving plate at equal intervals along the advancing direction, and the distance between the centers of adjacent metal plates is q = (2n-1)p / n.

[0017] Furthermore, each stator coil has the same number of turns and the same size. The two opposing stator coils in each group are connected in series. All stator coils are wound in the same direction so that their magnetic field is in the same direction. The magnitude, start time and duration of the pulse current flowing through each group of stator coils are adjusted by an external stator power supply device.

[0018] This invention also provides a power supply control method for a low-thrust pulsation multi-stage reconnection electromagnetic propulsion device. When the annular edge of the metal plate's tail aligns with the edge of a stator coil, the stator power supply device discharges the current to the two opposing stator coils to its maximum value. Through the reconnection effect of the metal plate in the electromagnetic field generated by the stator coils, the metal plate experiences a forward thrust. Similarly, the stator power supply device supplies discharge current to the first to the (2n-1)th stator coils, and the first to the nth metal plates are alternately subjected to force, propelling the metal plate a distance p. The stator power supply device then supplies discharge current to the second to the (2n)th stator coils, and the first to the nth metal plates are alternately subjected to force, continuing to propel the metal plate. Every n sets of stator coils energized complete the process, and the metal plate travels a distance p, i.e., the edge of the next adjacent set of stator coils aligns with the annular edge of the metal plate's tail, until the mth stator coil pushes the nth metal plate.

[0019] Furthermore, when the reconnected pulse electromagnetic propulsion device needs to operate within a small speed variation range, pulse currents are passed through each group of stator coils in the above sequence. Each time, the magnitude of the pulse current and the duration of the single pulse are the same, causing the n metal plates to generate thrusts of the same magnitude, frequency, and phase, and the resultant force of all thrusts is continuous. When the reconnected pulse electromagnetic propulsion device needs to operate within a large speed variation range, pulse currents are passed through each group of stator coils in the above sequence. The magnitude of the pulse currents passed through all stator coils is the same, but the duration of the single pulse decreases linearly with the increase of speed, causing the n metal plates to generate thrusts of the same magnitude and frequency that varies with speed, forming a continuous thrust in the metal plates.

[0020] Furthermore, each stator coil has a different number of turns but the same size. The stator coils in the low-speed range have more turns and those in the high-speed range have fewer turns. The two stator coils in each group are connected in series, and all stator coils are wound in the same direction. The magnitude, start time, and duration of the pulse current flowing through each group of stator coils are adjusted by an external stator power supply device.

[0021] Furthermore, the stator power supply device uses a supercapacitor as the power source, a thyristor as the main circuit control switch, and the control signal is provided based on the position sensor information. A discharge circuit composed of a resistor and a diode connected in series is connected in parallel with the power supply to provide a freewheeling function.

[0022] Beneficial effects:

[0023] Existing repeating pulse electromagnetic propulsion devices, while providing multiple thrusts in a single pass through multi-stage or continuous arrangements, actually deliver multiple high-impact thrusts to the driven object, making stable, continuous, and controllable operation impossible, and placing high demands on the mechanical structural strength of the driven object. This invention effectively utilizes the characteristics of repeating pulse electromagnetic propulsion devices, rationally arranging the pulse stator coils and metal plates to achieve a repeating pulse electromagnetic propulsion device that provides stable, continuous, and controllable thrust. This ensures the drive system operates according to the required speed and acceleration curves, making it suitable for continuous high-thrust drive of moving bodies within different speed ranges. This invention also provides a low-thrust-pulsation, multi-stage repeating electromagnetic propulsion device with modular packaging for the stator coil array, effectively reducing stator coil maintenance workload. Attached Figure Description

[0024] Figure 1 This is a three-dimensional model of the main structure of an embodiment of the low-thrust pulsation multi-stage reconnected electromagnetic propulsion device of the present invention.

[0025] Figure 2 This is a cross-sectional view of the stator coil assembly and mover plate structure of an embodiment of the low-thrust pulsation multi-stage reconnected electromagnetic propulsion device of the present invention;

[0026] Figure 3 This is an arrangement of metal plates n=4 and coil groups m≥8 in one embodiment;

[0027] Figure 4 A control circuit diagram of a stator power supply device according to one embodiment;

[0028] Figure 5 This is a diagram showing the positional relationship between the stator coil, the mover plate, and the metal plate at each pulse triggering moment, according to one embodiment.

[0029] Figure 6 A sequence diagram of the trigger signals for the control circuit of a stator power supply device according to one embodiment;

[0030] Figure 7 This refers to the total electromagnetic thrust output during the operation of one embodiment;

[0031] Figure 8 This refers to the current in each group of coils during the operation of one embodiment;

[0032] Figure 9 The voltage of the energy storage capacitor C1 during operation in one embodiment;

[0033] In the diagram, 1 is the stator coil, 2 is the mover plate, and 3 is the metal plate. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0035] The low-thrust pulsation reconnection electromagnetic propulsion device of the present invention includes two rows of stator coils, a mover plate embedded with n metal plates, a mover mechanism, and a stator power supply device; the two rows of stator coils are fixed in parallel on a stationary base, and the stator coils are arranged coaxially facing each other in pairs. Two stator coils arranged facing each other form a stator coil group, and the axes of the stator coils are located on the same plane; the metal plates are embedded in the mover plate, and the mover plate is fixed on the mover mechanism. The mover plate is located between and parallel to the two rows of stator coils, and the center of the metal plate is on the same plane as the axes of the two rows of stator coils. The load is connected to the moving mechanism through a connecting mechanism. Each row of stator coils is evenly spaced along the advancing direction. The axial distance between adjacent stator coil groups is p. There are a total of m stator coil groups, where m ≥ 2n is a positive integer. n metal plates are evenly spaced along the advancing direction on the moving plate. The distance between the centers of adjacent metal plates is q, where p < q < 2p. Each stator coil is equipped with a corresponding power supply device. The pulse current supplied to each group of stator coils is set by the stator power supply device, and the current is controlled according to the position of the moving plate to advance the moving plate.

[0036] Figure 1 This is a three-dimensional model of the main structure of an embodiment of the low-thrust pulsating multi-stage reconnected electromagnetic propulsion device of the present invention, including two rows of stator coils 1, a mover plate 2, and a row of metal plates 3. The metal plates 3 are evenly spaced on the mover plate 2 along the propulsion direction, with the mover plate 2 positioned between the two rows of stator coils 1 and parallel to them. The metal plates 3 are made of non-magnetic, highly conductive material, including aluminum alloy.

[0037] Figure 2 This is a cross-sectional view of the stator coil and metal plate structure of an embodiment of the low-thrust pulsation multi-stage reconnected electromagnetic propulsion device of the present invention, including two rows of stator coils 1 and one row of aluminum alloy metal plates 3. The metal plate 3 is an irregular shape formed by combining a semicircle with the same diameter as the stator coil 1 and a rectangle whose long side coincides with the diameter of the semicircle and whose long side is twice the length of the short side.

[0038] Figure 3This is an embodiment of the low-thrust pulsation multi-stage reconnection electromagnetic propulsion device of the present invention, showing an arrangement of metal plates 3 when the number of plates n=4. Each column of m stator coils 1 is evenly spaced along the propulsion direction, with a distance p between the centers of adjacent stator coils 1. Stator coils 1 with the same axis form a group, denoted as stator coil groups W1, W2, ..., W8, ..., Wm, for a total of m groups. Four metal plates S1, S2, S3, and S4 are evenly spaced along the propulsion direction, with a distance q between the centers of adjacent plates, where q = 7p / 4, m ≥ 8. Only the first 8 groups of stator coils are shown in the figure.

[0039] Figure 4 This is a control circuit diagram of a stator power supply device according to an embodiment of the present invention, with an inductive load Z. W1 To Z Wm Corresponding coil groups W1 to Wm, Z W1 To Z Wm Energy storage capacitors C1 to C m Power supply, resistors R1 to R m Diodes D1 to D1 respectively m Series connection, as C1 to C m The freewheeling circuit's on / off time is determined by the control signal g1 to g2 generated by the position sensor. m Control switches T1 to T1 respectively m Decide.

[0040] Figure 5 This diagram illustrates the positional relationship between the stator coils, moving plate, and metal plate at each pulse triggering moment, according to one embodiment. At the initial moment t = t1, the moving plate is located at x = x1, and the axis of metal plate S1 is aligned with the axis of stator coil group W1. Utilizing the reconnection effect, energizing stator coil group W1 at this time drives metal plate S1. After advancing a distance p / 4 until the moving plate is located at x = x2, the axis of metal plate S2 is aligned with the axis of stator coil group W3. At this time, energizing stator coil group W3 drives metal plate S2. This process continues sequentially, with each advance of a distance p / 4 resulting in a metal plate completely aligned with the axis of a stator coil group, sequentially from metal plate S3 to stator coil group W5. Metal plates S4-stator coil group W7, S1-stator coil group W2, S2-stator coil group W4, S3-stator coil group W6, S4-stator coil group W8... are alternately subjected to force. Every four groups of stator coils are energized, the moving plate moves forward by p, aligning the axis of metal plate S1 with the stator coil groups W1, W2, ..., W8. Then, four more groups of stator coils are energized in sequence, causing metal plates S1, S2, S3, and S4 to be alternately subjected to force, thus ensuring that all metal plates continuously generate thrust.

[0041] Figure 6This is a sequence diagram of the trigger signals of the control circuit in an embodiment of the present invention, wherein each position x1, x2, ... x 12 correspond Figure 5 x1, x2, ... x 12 When the moving plate is at x = x1, the axis of metal plate S1 is aligned with the axis of stator coil group W1. Control signal g1 controls control switch T1 to conduct, and energy storage capacitor C1 supplies power to stator coil group W1, generating thrust from metal plate S1. When the moving plate travels p / 4 to x = x2, the axis of metal plate S2 is aligned with the axis of stator coil group W3. Control signal g3 controls control switch T3 to conduct, and energy storage capacitor C3 supplies power to stator coil group W3, generating thrust from metal plate S2. When the moving plate travels p / 2 to x = x3, the axis of metal plate S3 is aligned with the axis of stator coil group W5. Control signal g5 controls control switch T5 to conduct, and energy storage capacitor C1 supplies power to stator coil group W3, generating thrust from metal plate S2. Energy storage capacitor C5 supplies power to stator coil group W5, and metal plate S3 generates thrust; when the moving plate moves 3p / 4 to x=x4, the axis of metal plate S4 is aligned with the axis of stator coil group W7, control signal g7 controls control switch T7 to conduct, energy storage capacitor C7 supplies power to stator coil group W7, and metal plate S4 generates thrust; when the moving plate moves p to x=x5, the axis of metal plate S1 is aligned with the axis of stator coil group W2, that is, metal plate S1 completely leaves stator coil group W1, and control T1 is no longer kept conducting, stator coil group W1 enters freewheeling state, and at the same time control signal g2 controls control switch T2 to conduct, energy storage capacitor C2 supplies power to stator coil group W7. The sub-coil group W2 is powered, causing the metal plate S1 to continuously generate thrust. When the moving sub-plate travels 5p / 4 to x = x6, the axis of the metal plate S2 is aligned with the axis of the stator coil group W4, meaning the metal plate S2 has completely left the stator coil group W3. Control switch T3 is no longer kept on, and the stator coil group W3 enters freewheeling mode. Simultaneously, control signal g4 controls control switch T4 to conduct, and energy storage capacitor C4 powers the stator coil group W4, causing the metal plate S2 to continuously generate thrust. When the moving sub-plate travels 3p / 2 to x = x7, the axis of the metal plate S3 is aligned with the axis of the stator coil group W6, meaning the metal plate S3 has completely left the stator coil group W5. Then, control switch T5 remains on, and stator coil group W5 enters freewheeling mode. Simultaneously, control signal g6 keeps control switch T6 on, and energy storage capacitor C6 supplies power to stator coil group W6, causing metal plate S3 to continuously generate thrust. When the moving plate travels 7p / 4 to x=x8, the axis of metal plate S4 aligns with the axis of stator coil group W8, meaning metal plate S4 has completely left stator coil group W7. Control switch T7 is no longer on, and stator coil group W7 enters freewheeling mode. Simultaneously, control signal g8 keeps control switch T8 on, and energy storage capacitor C8 supplies power to stator coil group W8, causing metal plate S4 to continuously generate thrust. This ensures that each metal plate fully utilizes the energy provided by each coil, and that all metal plates are under thrust at all times, continuously converting energy from the continuously arranged stator coils (stator coil groups W1, W2, ...).

[0042] Figure 7 The total electromagnetic thrust output during the operation of the embodiment Figure 8 For the current of each corresponding group of stator coils 1, Figure 9 The voltage of the energy storage capacitor C1 is used. One structural configuration of the low-thrust pulsating multi-stage reconnected electromagnetic propulsion device is as follows: each stator coil has the same number of turns and the same size. Two opposing stator coils within each group are connected in series, and all stator coils are wound in the same direction. The magnitude, start time, and duration of the pulse current flowing through each group of stator coils are adjusted by an external stator power supply device. Pulse currents are sequentially applied to each group of stator coils 1, with the same magnitude of pulse current applied to all stator coils 1. The duration of a single pulse decreases slightly with increasing speed, generating thrust of the same magnitude and frequency that varies with speed on the four metal plates. The resultant force applied to the mover plate by all thrusts is a continuous, approximately sinusoidal wave. The voltage of the energy storage capacitor eventually drops to 0, indicating that the energy of the capacitor has been fully utilized.

[0043] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage reconnected electromagnetic propulsion device with low thrust pulsation, characterized in that, The system includes two rows of stator coils, a mover plate embedded with n metal plates, a mover mechanism, and a stator power supply device. The two rows of stator coils are fixed in parallel on a stationary base, with each pair of stator coils arranged coaxially facing each other. Two stator coils arranged face-to-face form a stator coil group, and the axes of the stator coils are on the same plane. The metal plates are embedded in the mover plate, which is fixed to the mover mechanism. The mover plate is located between and parallel to the two rows of stator coils, and the center of the metal plate is on the same plane as the axes of the two rows of stator coils. The load is connected to the mover mechanism through a connecting mechanism. Each row of stator coils is evenly spaced along the advancing direction, and the axial distance between adjacent stator coil groups is p. There are m stator coil groups in total, where m ≥ 2n is a positive integer. The n metal plates are evenly spaced along the advancing direction on the mover plate, and the distance between the centers of adjacent metal plates is q, where p < q < 2p. Each group of stator coils is equipped with a corresponding power supply device. By setting the magnitude of the pulse current supplied to each group of stator coils by the stator power supply device and controlling the current flow according to the position of the mover plate, the mover plate is propelled to move.

2. The low-thrust pulsation multi-stage reconnection electromagnetic propulsion device according to claim 1, characterized in that, The n metal plates are made of non-magnetic, highly conductive materials, including aluminum alloys.

3. The low-thrust pulsation multi-stage reconnection electromagnetic propulsion device according to claim 1, characterized in that, The stator coils are either toroidal or racetrack-shaped, and are modularly packaged to form a stator array.

4. The low-thrust pulsation multi-stage reconnection electromagnetic propulsion device according to claim 1, characterized in that, The metal plate is a circle with the same diameter as the stator coil, or a rectangle circumscribed by a circle with the same diameter as the stator coil, or an irregular shape formed by combining a semicircle with the same diameter as the stator coil and a rectangle whose long side coincides with the diameter of the semicircle and whose long side is twice the diameter of the short side.

5. A low-thrust-pulsation, multi-stage reconnection electromagnetic propulsion device according to claim 1, characterized in that, Metal plates are evenly embedded in the moving plate at equal intervals along the advancing direction, and the distance between the centers of adjacent metal plates is q = (2n-1)p / n.

6. A low-thrust-pulsation, multi-stage reconnection electromagnetic propulsion device according to claim 1, characterized in that, Each stator coil has the same number of turns and the same size. The two opposing stator coils in each group are connected in series. All stator coils are wound in the same direction so that their magnetic field is in the same direction. The magnitude, start time and duration of the pulse current flowing through each group of stator coils are adjusted by an external stator power supply device.

7. A power supply control method for a low-thrust pulsation multi-stage reconnection electromagnetic propulsion device according to any one of claims 1-6, characterized in that, When the annular edge of the metal plate aligns with the edge of a stator coil, the stator power supply device discharges the current to the two opposing stator coils to its maximum value. Through the reconnection effect of the metal plate in the electromagnetic field generated by the stator coil, the metal plate is subjected to a forward thrust. In this manner, the stator power supply device sequentially supplies discharge current to the first to the (2n-1)th stator coils, and the first to the nth metal plates are alternately subjected to force, propelling the moving plate to move. The distance traveled is the axial distance p between adjacent stator coil groups. The stator power supply device then sequentially supplies discharge current to the second to the (2n)th stator coils, and the first to the nth metal plates are alternately subjected to force, continuing to propel the moving plate to move. Every n groups of stator coils are energized, the metal plate travels the axial distance p between adjacent stator coil groups, that is, the edge of the next adjacent group of stator coils aligns with the annular edge of the tail of the metal plate, until the mth stator coil pushes the nth metal plate.

8. The power supply control method according to claim 7, characterized in that, When the multi-stage reconnected electromagnetic propulsion device needs to operate within a small speed variation range, pulse currents are passed through each group of stator coils in the above sequence. The magnitude and duration of each pulse current in the stator coils are the same, resulting in thrusts of the same magnitude, frequency, and phase on the n metal plates. The resultant force of all thrusts is continuous. When the multi-stage reconnected electromagnetic propulsion device needs to operate within a large speed variation range, pulse currents are passed through each group of stator coils in the above sequence. The magnitude of the pulse currents in all stator coils is the same, but the duration of each pulse decreases linearly with increasing speed. Thrusts of the same magnitude and frequency that vary with speed are generated on the n metal plates, forming a continuous thrust in the mover plate.

9. The power supply control method according to claim 7, characterized in that, The stator power supply unit uses a supercapacitor as the power source and a thyristor as the main circuit control switch. The control signal is provided based on the position sensor information. A discharge circuit composed of a resistor and a diode connected in series is connected in parallel with the power supply to provide freewheeling.

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