High-speed switch valve driving electromagnet based on double-coil excitation and control method thereof

Abstract

The invention relates to a high-speed switch valve driving electromagnet based on double-coil excitation and a control method thereof.The electromagnet comprises an outer protection assembly, a plug iron, coils, an armature and a movable iron core, the plug iron, the armature and the movable iron core are sequentially arranged on the outer protection assembly from top to bottom, and a set of coils are arranged on the outer side of the plug iron and the outer side of the movable iron core in a surrounding mode; the two groups of coils are respectively used for exciting the armature and the movable iron core, and the lower end of the movable iron core is used for being connected with a high-speed switch valve. Compared with the prior art, the movable iron core and the static iron core can be excited simultaneously, and the response speed of the electromagnet is greatly increased; suction force can be provided when currents of the two coils are in the same direction, release force is provided when the currents are in the reverse direction, and the reset speed of a valve element of the high-speed switch valve is remarkably increased; according to the invention, the actuation frequency of the valve is 1 / 2 of the voltage switching frequency under the condition of no deviation of voltage excitation, so that the upper limit of the working frequency of the high-speed switching valve is greatly improved, and higher-performance control is realized.

Description

Technical Field

[0001] The present invention relates to an electric-mechanical conversion mechanism for a high-speed digital switch valve in the technical field of fluid transmission and control, and in particular to a high-speed switch valve driving electromagnet based on double-coil excitation and a control method thereof. Background Art

[0002] As a key component that can quickly respond and accurately control the on and off of fluids, high-speed switch valves are widely used in aerospace, automobile, hydraulic and pneumatic control systems and other fields. As the core driving component of high-speed switch valves, the performance of electromagnets directly affects the dynamic response speed, control accuracy and long-term working stability of high-speed switch valves. Therefore, the development of high-performance and high-reliability electromagnets has become an important research direction in related fields.

[0003] Traditional electromagnets usually adopt a single-coil structure, which generates electromagnetic force to drive the armature and the moving iron core to move after the coil is energized. However, the design of the single-coil structure has certain limitations in terms of high-speed action and precise control. For example, under high-frequency excitation, the driving efficiency of the single-coil electromagnet may decrease due to hysteresis effect and response delay. In addition, the structural design of traditional electromagnets is prone to problems such as unstable air gap size and magnetic flux leakage, which reduces its magnetic circuit efficiency and response speed.

[0004] In order to solve the above problems, some improved electromagnets have been gradually proposed in recent years, such as multi-coil design, optimized magnetic circuit structure and improved moving parts. However, most of the current dual-coil driven electromagnets have high complexity in structural design, increased costs, and the flux utilization rate is still not ideal. Therefore, how to simplify the electromagnet structure design while further improving the response speed, reducing the hysteresis effect, and enhancing the control accuracy is still a key problem that the existing technology needs to solve urgently.

[0005] Chinese patent CN202310062521.9 provides a high-speed switch valve driven by dual electromagnets, which uses two upper and lower electromagnet components to form two closed magnetic flux loops through the excitation of the upper coil and the lower coil to achieve high-speed response performance. However, it ensures the centering of the valve core by setting multiple pairs of ball slides inside the core ring seat and embedding guide rollers, which has a complex structure and is difficult to process and assemble; the control method proposed by it does not require the dual coils to work at the same time, and when one of the electromagnets is idle, its efficiency has a large room for improvement.

[0006] Chinese patent CN201220277819.9 provides a high-pressure resistant springless direct-acting high-speed switch electromagnet, which is designed with a multi-yoke iron nested structure, isolating an independent space for the coil, and uses a sealing ring for sealing, so that the system has the ability to work in a wet state. It nests a permanent magnet in the shell, and controls the opening and closing of the solenoid valve by changing the direction of the coil current; but its working air gap is small, the stroke is short, and the coil winding space is small, the internal space is large, and when the interior is filled with oil, a damping force will be formed, which has a great impact on the output force, and cannot cope with high-power and high-load conditions; at the same time, it relies on sealing rings and the like for dry-wet separation, and the reliability of the seal needs to be improved in a high-pressure wet environment.

[0007] Chinese patent CN202310072280.6 provides a high-frequency response, high-reliability, high-speed switching electromagnet device and control method. Its high-speed switching electromagnet uses a main and auxiliary coil structure, and uses an auxiliary coil to assist the reset spring to enhance the armature restoring force, thereby increasing the armature return speed and force. However, this control method retains the reset spring while using the auxiliary coil, which increases the structural complexity and control difficulty, and relies on precise detection of the control current, which greatly increases the complexity and instability of the control system. Summary of the invention

[0008] The purpose of the present invention is to provide a high-speed switch valve driving electromagnet based on double coil excitation and a control method thereof in order to solve the problems existing in the prior art. The present invention effectively improves the dynamic response performance of the electromagnet, enhances its control reliability and stability, and meets the application requirements of high-speed switch valve driving by reasonably designing the double coil arrangement, magnetic circuit structure, and the coordinated working mode of the moving iron core and the armature.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A high-speed switch valve driving electromagnet based on double-coil excitation includes an outer protection component, a plug, a coil, an armature and a moving iron core. The outer protection component is provided with a plug, an armature and a moving iron core in sequence from top to bottom. A group of coils are arranged around the outer side of the plug and the outer side of the moving iron core. The two groups of coils are used to excite the armature and the moving iron core respectively. The lower end of the moving iron core is used to be connected to the high-speed switch valve.

[0011] As a preferred technical solution, the iron stopper, the armature and the moving iron core are arranged on the central axis of the outer protection component.

[0012] Furthermore, the outer protection assembly includes a blocking frame, a shell and a sealing iron which are sequentially connected and assembled from top to bottom, and a cavity is formed in the blocking frame, the shell and the sealing iron, and the cavity is used to accommodate the blocking iron, the coil, the armature and the moving iron core.

[0013] The blocking frame is arranged on the outside of the blocking iron, the shell is arranged on the outside of the blocking frame and the coil, and the sealing iron is arranged on the outside of the moving iron core.

[0014] Furthermore, the blocking iron and the blocking frame are connected by threads, and the lower part of the blocking iron is in close contact with the armature.

[0015] Furthermore, the blocking frame is provided with two upper and lower coil frames, and the two groups of coils are respectively wound on one coil frame.

[0016] As a preferred technical solution, a screw plug is provided between the coil frame and the armature, and the screw plug is used to fix the armature.

[0017] Furthermore, a valve sleeve is provided between the coil frame and the moving iron core, the valve sleeve is fixed above the sealing iron, and the valve sleeve is used to axially limit the moving iron core.

[0018] Furthermore, the movable iron core and the valve sleeve are provided with a sliding fit structure to ensure that the movable iron core can flexibly move axially, and the lower end of the movable iron core is connected to the valve core of the high-speed switching valve through the valve sleeve to control the on-off of the working medium.

[0019] Furthermore, a fixing sleeve is provided between the moving iron core and the outer shell, the fixing sleeve is fixed on the coil frame below, the armature is located above the fixing sleeve, the fixing sleeve is used to limit the armature, and the fixing sleeve also limits the maximum movement distance of the moving iron core.

[0020] As a preferred technical solution, the coil frame and the fixing sleeve jointly define the installation positions of the two groups of coils, ensuring that the two groups of coils are respectively located outside the blocking iron and the moving iron core and are coaxial therewith.

[0021] Furthermore, an air gap is provided between the stopper and the armature, and the air gap is used to provide a free movement space for the armature under the action of electromagnetic force.

[0022] Furthermore, the materials of the blocking frame, blocking iron, housing, armature, moving iron core and sealing iron are all electrical pure iron DT4C.

[0023] The material of the fixed sleeve and the valve sleeve is aluminum alloy.

[0024] The material of the coil is copper.

[0025] The material of the coil frame is PVC.

[0026] In addition, the present invention also provides a control method for a high-speed switch valve driving electromagnet based on double-coil excitation, and the specific steps are as follows:

[0027] S1. Use the initial positive voltage preset by the control system to apply voltage to the upper coil and the lower coil and monitor the current in the two sets of coils in real time. At this time, the electromagnet is attracted and the high-speed switch valve is opened;

[0028] S2, after applying the initial positive voltage for a preset first period of time Δt, the voltage applied to the upper coil is switched to the initial negative voltage, and the voltage of the lower coil remains unchanged, at which time the electromagnet is released;

[0029] S3. After step S2, the upper coil and the lower coil operate at a frequency of 4Δt and maintain a phase difference of Δt.

[0030] As a preferred technical solution, the voltage changes in the two sets of coils of the control system are utilized to change the magnetic flux and magnetic flux direction in the device. The moving iron core affected by the magnetic flux continuously moves back and forth to control the opening and closing state of the valve core, thereby realizing the driving of the switch valve load.

[0031] The working principle of the present invention is as follows:

[0032] The plugging iron and the armature are in close contact to form a permanent magnet, which is axially magnetized to N and S levels under the excitation of the upper coil; the moving iron core serves as a permanent magnet, which is axially magnetized to N and S levels under the excitation of the lower coil.

[0033] Furthermore, when the two groups of coils are excited with current in the same direction, the N-pole and S-pole of the two permanent magnets point in the same direction, and the two permanent magnets generate an attractive force. Since the armature is completely fixed, the moving iron core generates an upward attractive force, moves closer to the armature, and the electromagnet is attracted.

[0034] Furthermore, when the two groups of coils are excited with reverse currents, the N-pole and S-pole of the two permanent magnets point in opposite directions, a repulsive force is generated between the two permanent magnets, the moving iron core moves away from the armature, and the electromagnet is released.

[0035] The control method described in the present invention is to control the voltage instruction timing of the control system to the two sets of coils and the coordination relationship between the two sets of coils. By reasonably configuring the voltage timing of the two sets of coils, the response speed of the electromagnet moving iron core can be improved, thereby improving the opening and closing response speed of the high-speed switch valve, reducing the minimum adjustable duty cycle of the high-speed switch valve, and improving the flow control accuracy.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] 1. The structural dimensions of the present invention are not significantly different from those of the existing electromagnets for high-speed switch valves, and the performance of the electromagnets is improved without increasing their dimensions.

[0038] 2. Compared with the traditional single-coil high-speed switch electromagnet, the present invention proposes a double-coil electromagnet, which utilizes the mechanism that the same-direction currents of the double coils attract each other and the opposite-direction currents repel each other, so that the release process of the high-speed switch valve no longer requires the reset force provided by the spring, thereby eliminating the spring, simplifying the high-speed switch valve structure and the mathematical model of the high-speed switch valve, and greatly reducing the response time of the high-speed switch valve's attraction and release, increasing the available duty cycle, and achieving more precise and extensive control.

[0039] 3. Compared with the traditional single voltage control method, the present invention proposes a working method for independent operation of dual coils based on the unique mechanism of dual-coil high-speed switching electromagnets, so that when the dual-coil currents are both excited at a frequency of 4Δt and an alternating Δt between the two currents, the moving iron core will operate at a frequency of 2Δt, which can greatly increase the upper limit of the working frequency of the high-speed switching valve and obtain better performance.

[0040] 4. Compared with the comparative patent CN202310062521.9, the moving iron core of the high-speed switch valve described in the present invention is limited by the valve sleeve, and has a small size, fast response, simple structure and easy assembly; the high-speed switch valve control method described in the present invention fully mobilizes the dual electromagnets, can output greater electromagnetic force, greatly increase the response speed, and significantly improve the working efficiency of the high-speed switch valve.

[0041] 5. Compared with the comparative patent CN201220277819.9, the present invention is an improved design based on the original common aerospace high-speed switch valve. The overall design relies on interference fit to avoid complex nested structures, and the structure is reliable. The present invention uses the basic electromagnetic theory of polarity, uses a dual electromagnet structure, and abandons the use of permanent magnets, so that the core release process is driven by active electromagnetic force, avoiding the influence caused by demagnetization of permanent magnets in extreme environments.

[0042] 6. Compared with the comparative patent CN201220277819.9, the control method described in the present invention only requires the dual-coil voltage to alternate periodically and maintain a certain phase difference, eliminating the reset spring structure and also not requiring a high-precision detection and feedback system, which greatly reduces the cost and improves the system reliability.

[0043] 7. The control method of the high-speed switch valve driving electromagnet based on dual-coil excitation provided by the present invention provides a new form different from the traditional single-coil driving method, which can provide attraction and release force for the valve core. Compared with the existing direct-acting high-speed switch valve electromagnet, the present invention can excite the dynamic and static iron cores at the same time, greatly improving the response speed of the electromagnet; the present invention can provide attraction force when the dual-coil current is in the same direction, and provide release force when the current is reversed, significantly improving the reset speed of the high-speed switch valve valve core; the present invention can achieve the valve actuation frequency of 1 / 2 of the voltage switching frequency under the condition of no deviation based on voltage excitation, greatly improving the upper limit of the high-speed switch valve working frequency and achieving higher performance control. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the driving electromagnet in the present invention;

[0045] Figure 2 It is a schematic diagram of the control current and the actuation state of the moving iron core used in the present invention.

[0046] Explanation of the accompanying figures: 1. blocking frame, 2. iron blocking, 3. shell, 4. coil frame, 5. coil, 6. armature, 7. fixed sleeve, 8. moving iron core, 9. valve sleeve, 10. sealing iron. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0049] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or structures used in the art to achieve corresponding functions.

[0052] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0053] Example 1

[0054] See also Figure 1 The present embodiment provides a high-speed switch valve driving electromagnet based on double-coil excitation, including an outer protection component, a plug 2, a coil 5, an armature 6 and a moving iron core 8, the outer protection component is provided with a plug 2, an armature 6 and a moving iron core 8 from top to bottom, a group of coils 5 are arranged around the outer side of the plug 2 and the outer side of the moving iron core 8, the two groups of coils 5 are used to excite the armature 6 and the moving iron core 8 respectively, and the lower end of the moving iron core 8 is used to be connected to the high-speed switch valve.

[0055] In this embodiment, the iron stopper 2, the armature 6 and the moving iron core 8 are arranged on the central axis of the outer protection component.

[0056] In this embodiment, the outer protection assembly includes a blocking frame 1, a shell 3 and a sealing iron 10 which are sequentially connected and assembled from top to bottom. The cavity formed in the blocking frame 1, the shell 3 and the sealing iron 10 is used to accommodate the blocking iron 2, the coil 5, the armature 6 and the moving iron core 8.

[0057] The blocking frame 1 is arranged outside the blocking iron 2 , the housing 3 is arranged outside the blocking frame 1 and the coil 5 , and the sealing iron 10 is arranged outside the moving iron core 8 .

[0058] In this embodiment, the blocking iron 2 is connected to the blocking frame 1 by threads, and the lower part of the blocking iron 2 is in close contact with the armature 6.

[0059] In this embodiment, two upper and lower coil frames 4 are provided on the blocking frame 1 , and the two groups of coils 5 are respectively wound on one coil frame 4 .

[0060] In this embodiment, a screw plug is provided between the coil frame 4 and the armature 6 , and the screw plug is used to fix the armature 6 .

[0061] In this embodiment, a valve sleeve 9 is provided between the coil frame 4 and the moving iron core 8 . The valve sleeve 9 is fixed above the sealing iron 10 . The valve sleeve 9 is used to axially limit the moving iron core 8 .

[0062] In this embodiment, the moving iron core 8 and the valve sleeve 9 are in a sliding fit structure to ensure that the moving iron core 8 can move flexibly in the axial direction. The lower end of the moving iron core 8 is connected to the valve core of the high-speed switching valve through the valve sleeve 9 to control the on and off of the working medium.

[0063] In this embodiment, a fixing sleeve 7 is provided between the moving iron core 8 and the outer shell 3, and the fixing sleeve 7 is fixed on the coil frame 4 below. The armature 6 is located above the fixing sleeve 7. The fixing sleeve 7 is used to limit the armature 6. The fixing sleeve 7 also limits the maximum movement distance of the moving iron core 8.

[0064] In this embodiment, the coil frame 4 and the fixing sleeve 7 jointly define the installation positions of the two groups of coils 5, ensuring that the two groups of coils 5 are respectively located outside the blocking iron 2 and the moving iron core 8 and are coaxial therewith.

[0065] In this embodiment, an air gap is provided between the stopper 2 and the armature 6, and the air gap is used to provide a free movement space for the armature 6 under the action of electromagnetic force.

[0066] In this embodiment, the materials of the blocking frame 1, the blocking iron 2, the housing 3, the armature 6, the moving iron core 8 and the sealing iron 10 are all electrical pure iron DT4C.

[0067] The material of the fixing sleeve 7 and the valve sleeve 9 is aluminum alloy.

[0068] The material of the coil 5 is copper.

[0069] The material of the coil frame 4 is PVC.

[0070] In addition, this embodiment also provides a control method for a high-speed switch valve driving electromagnet based on dual-coil excitation, and the specific steps are as follows:

[0071] S1, using the initial positive voltage preset by the control system to apply voltage to the upper coil 5 and the lower coil 5 and monitor the current in the two sets of coils 5 in real time, at this time the electromagnet is attracted and the high-speed switch valve is opened;

[0072] S2, after applying the initial positive voltage for a preset first period of time Δt, the voltage applied to the upper coil 5 is switched to the initial negative voltage, and the voltage of the lower coil 5 remains unchanged, at which time the electromagnet is released;

[0073] S3. After step S2, the upper coil 5 and the lower coil 5 operate at a frequency of 4Δt and maintain a phase difference of Δt.

[0074] Example 2

[0075] See also Figure 1 This embodiment provides a high-speed switch valve driving electromagnet based on double-coil excitation, which is composed of a blocking frame 1, a shell 3 and a sealing iron 10 as an outer protection component. The internal cavity of the outer protection component contains a double-coil electromagnet component, a fixing sleeve 7 and a valve sleeve 9.

[0076] The double-coil electromagnet assembly includes: an upper coil 5 and a coil frame 4, a lower coil 5 and a coil frame 4, a plug 2 as a permanent magnet, an armature 6 and a moving iron core 8. Since an air gap is provided inside the electromagnet device, the moving iron core 8 can move up and down to change the working state. The lower part of the moving iron core 8 is connected to the switch valve unit. The movement of the moving iron core 8 drives the switch valve core to open and close, realizing the function of the high-speed switch valve to control the on and off of the working medium.

[0077] In the external protection assembly, the connection between the blocking frame 1 and the housing 3, and between the housing 3 and the sealing iron 10 are both interference fit, and the matching between the blocking frame 1 and the sealing iron 2 is threaded matching. By adjusting the tightness of the thread, the sealing iron 2 is closely attached to the armature 6 to ensure that there is no gap, reduce magnetic leakage, and ensure the response performance of the electromagnet.

[0078] The functions of the fixing sleeve 7 include: positioning the moving iron core 8 laterally to ensure that the moving iron core 8 moves in a straight line, and serving as a lower support for the armature 6 to ensure that the relative position of the armature 6 inside the valve is fixed.

[0079] The valve sleeve 9 has the following functions: lateral positioning of the moving iron core 8 to ensure that the moving iron core 8 moves in a straight line.

[0080] When the moving iron core 8 is subjected to the upward attraction electromagnetic force, the moving iron core 8 moves upward until the upper side of the moving iron core 8 is close to the lower side of the armature 6, and the valve core of the switch valve connected below the electromagnet is opened. When the moving iron core 8 is subjected to the downward repulsive electromagnetic force, the moving iron core 8 moves downward until the lower side of the boss of the moving iron core 8 is close to the upper edge of the valve sleeve 9, and the valve core of the switch valve connected below the electromagnet is closed.

[0081] When no voltage is applied to the double coils 5 and the working medium flows in the high-speed switch valve, the moving iron core 8 is only subjected to the pressure of the working medium. At this time, the working medium is disconnected, and because the high-speed switch valve based on the double coils 5 is not provided with a spring reset, the moving iron core 8 will not automatically reset to the closed state. The preset initial state is that both the double coils 5 apply a positive current, at which time the moving iron core 8 is subjected to an upward suction force, and the high-speed switch valve is opened.

[0082] In this embodiment, the materials of the blocking frame 1, the blocking iron 2, the housing 3, the armature 6, the moving iron core 8, and the sealing iron 10 are electrical pure iron DT4C, which has good magnetic conductivity and is widely used as the material of the electromagnet core component;

[0083] The material of the fixed sleeve 7 and the valve sleeve 9 is aluminum alloy, which has low magnetic conductivity. Placing it between the coil and the valve core can effectively guide the magnetic flux and improve the efficiency of the electromagnet;

[0084] The material of the coil 5 is copper, and the material of the coil frame 4 is PVC.

[0085] In addition, see Figure 2 This embodiment also provides a control method for a high-speed switch valve driving electromagnet based on double-coil excitation, and the specific steps are as follows:

[0086] Step 1: Use the initial positive voltage preset by the control system to apply voltage to the upper coil 5 and the lower coil 5 and monitor the current in the upper coil 5 and the lower coil 5 in real time. The polarity direction of the permanent magnet formed by the combination of the plug 2 and the armature 6 is the same as the polarity direction of the permanent magnet formed by the moving iron core 8. The magnetic pole at the bottom of the permanent magnet formed by the combination of the plug 2 and the armature 6 is different from the magnetic pole at the top of the permanent magnet formed by the moving iron core 8. An attraction is formed between the two permanent magnets. At this time, the electromagnet is attracted and the high-speed switch valve is opened.

[0087] Step 2: After applying the initial positive voltage for a preset first period of time Δt, the voltage applied to the upper coil 5 is switched to the initial negative voltage, and the voltage of the lower coil 5 remains unchanged. The polarity direction of the permanent magnet formed by the combination of the plug 2 and the armature 6 is opposite to the polarity direction of the permanent magnet formed by the moving iron core 8. The magnetic pole at the bottom of the permanent magnet formed by the combination of the plug 2 and the armature 6 is the same as the magnetic pole at the top of the permanent magnet formed by the moving iron core 8, and a repulsive force is formed between the two permanent magnets. At this time, the electromagnet is released and the high-speed switch valve is closed.

[0088] Step 3: After step 2, the upper coil 5 and the lower coil 5 operate at a frequency of 4Δt and maintain a phase difference of Δt. The voltage change in the control system double coil 5 is used to change the magnetic flux and magnetic flux direction in the device. The moving iron core 8 affected by the magnetic flux continuously moves back and forth to control the opening and closing state of the valve core, thereby realizing the drive of the switch valve load.

[0089] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A high-speed switch valve driving electromagnet based on double coil excitation, characterized in that: The invention comprises an outer protection component, an iron plug (2), a coil (5), an armature (6) and a moving iron core (8), wherein the iron plug (2), the armature (6) and the moving iron core (8) are arranged on the outer protection component in sequence from top to bottom, a group of coils (5) are arranged around the outer side of the iron plug (2) and the outer side of the moving iron core (8), the two groups of coils (5) are used to excite the armature (6) and the moving iron core (8) respectively, and the lower end of the moving iron core (8) is used to be connected to a high-speed switch valve.

2. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 1, characterized in that: The outer protection assembly comprises a blocking frame (1), a housing (3) and a sealing iron (10) which are sequentially connected and assembled from top to bottom, a cavity formed in the blocking frame (1), the housing (3) and the sealing iron (10), and the cavity is used to accommodate the blocking iron (2), the coil (5), the armature (6) and the moving iron core (8), The blocking frame (1) is arranged on the outside of the blocking iron (2), the housing (3) is arranged on the outside of the blocking frame (1) and the coil (5), and the sealing iron (10) is arranged on the outside of the moving iron core (8).

3. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 2, characterized in that: The blocking iron (2) is connected to the blocking frame (1) by threads, and the lower part of the blocking iron (2) is in close contact with the armature (6).

4. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 2, characterized in that: The blocking frame (1) is provided with two upper and lower coil frames (4), and the two groups of coils (5) are respectively wound on one coil frame (4).

5. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 4, characterized in that: A valve sleeve (9) is provided between the coil frame (4) and the moving iron core (8), the valve sleeve (9) being fixed above the sealing iron (10), and the valve sleeve (9) being used for axially limiting the moving iron core (8).

6. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 5, characterized in that: The movable iron core (8) and the valve sleeve (9) are provided with a sliding fit structure to ensure that the movable iron core (8) can flexibly move in the axial direction. The lower end of the movable iron core (8) is connected to the valve core of the high-speed switch valve through the valve sleeve (9) to control the on and off of the working medium.

7. A high-speed switch valve driving electromagnet based on double coil excitation according to claim 5, characterized in that: A fixing sleeve (7) is provided between the moving iron core (8) and the outer shell (3); the fixing sleeve (7) is fixed on the coil frame (4) below; the armature (6) is located above the fixing sleeve (7); the fixing sleeve (7) is used to limit the position of the armature (6); and the fixing sleeve (7) also limits the maximum movement distance of the moving iron core (8).

8. The high-speed switch valve driving electromagnet based on double coil excitation according to claim 1, characterized in that: An air gap is provided between the iron stopper (2) and the armature (6), and the air gap is used to provide a free movement space for the armature (6) under the action of electromagnetic force.

9. The high-speed switch valve driving electromagnet based on double coil excitation according to claim 7, characterized in that: The materials of the blocking frame (1), blocking iron (2), housing (3), armature (6), moving iron core (8) and sealing iron (10) are all electrical pure iron DT4C. The material of the fixing sleeve (7) and the valve sleeve (9) is aluminum alloy. The material of the coil (5) is copper. The material of the coil frame (4) is PVC.

10. A control method for a high-speed switch valve driving electromagnet based on double-coil excitation as claimed in any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, using the initial positive voltage preset by the control system to apply voltage to the upper coil (5) and the lower coil (5) and monitor the current in the two sets of coils (5) in real time, at which time the electromagnet is attracted and the high-speed switch valve is opened; S2, after applying the initial positive voltage for a preset first period of time Δt, the voltage applied to the upper coil (5) is switched to the initial negative voltage, and the voltage of the lower coil (5) remains unchanged, at which time the electromagnet is released; S3. After step S2, the upper coil (5) and the lower coil (5) operate at a frequency of 4Δt and maintain a phase difference of Δt.

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