A wide-range pulse forming circuit and device for magnetically shielded spaces

Abstract

This disclosure relates to the field of magnetic shielding space technology, and discloses a wide-range pulse forming circuit and device for magnetic shielding spaces. In the positive and negative pulse forming circuits, a charging unit is used to boost and charge the energy storage elements of a stacked boost unit through continuous oscillation. The stacked boost unit is composed of multi-stage Marx circuit modules, used to achieve parallel charging and series discharging of the energy storage elements through switching timing control, outputting bipolar rectangular pulses with independently adjustable amplitude and pulse width. A noise reduction and DC blocking module is used for noise reduction and DC blocking. The magnetic shielding device is used to demagnetize the magnetic shielding space. By setting up identical and independent positive and negative pulse forming circuits, combined with the multi-stage Marx circuit modules of the stacked boost unit and switching timing control, the amplitude and pulse width of the bipolar rectangular pulses are independently adjustable, thus adapting to the diverse demagnetization requirements of magnetic shielding devices and broadening the circuit's applicability.

Description

Technical Field

[0001] This invention relates to the field of magnetic shielding space technology, and more specifically to a wide-range pulse forming circuit and apparatus for magnetic shielding spaces. Background Technology

[0002] With the increasing application of magnetic shielding devices in large-scale precision equipment, the performance of the demagnetizing power supply for the shielding layer plays a crucial role in the shielding effect. It needs to meet stringent requirements such as high stability, wide parameter adjustment and low noise. The expansion of application scenarios has posed higher challenges to demagnetizing technology.

[0003] In related technologies, demagnetization schemes mostly focus on equipment such as transformers. Although they can achieve basic demagnetization functions, they have significant limitations: some schemes have non-adjustable positive and negative output voltages, and pulse parameters are difficult to adjust in real time, making them unsuitable for the high-power, wide-range demagnetization requirements of multi-layered, complex-structured, and multi-dielectric-shielded magnetic shielding devices. Therefore, how to make the pulses generated by the pulse forming circuit flexibly adjustable in pulse parameters to adapt to multi-layered, complex-structured, and multi-dielectric-shielded magnetic shielding devices has become a pressing technical problem that needs to be solved. Summary of the Invention

[0004] In view of this, the present invention provides a wide-range pulse forming circuit and apparatus for magnetic shielding spaces, in order to solve the problem of how to make the pulses formed by the pulse forming circuit flexibly adjust the pulse parameters, thereby adapting to magnetic shielding devices with multi-layered, complex structures and multi-medium shielding materials.

[0005] This disclosure provides a wide-range pulse forming circuit for a magnetically shielded space. The circuit includes a positive pulse forming circuit, a negative pulse forming circuit, a noise reduction and DC blocking module, and a magnetic shielding device. The output terminals of both the positive and negative pulse forming circuits are connected to the noise reduction and DC blocking module, which is then connected to the magnetic shielding device. The positive and negative pulse forming circuits have the same structure and are independent of each other, each including a charging unit and a stacked boost unit. The output terminal of the charging unit is connected to the input terminal of the stacked boost unit. The charging unit is used to boost and charge the energy storage element of the stacked boost unit through a continuous oscillation mode. The stacked boost unit is composed of multi-stage Marx circuit modules and is used to realize parallel charging and series discharging of the energy storage element through switching timing control, outputting a bipolar rectangular pulse with independently adjustable amplitude and pulse width. The noise reduction and DC blocking module is used to perform noise reduction and DC blocking processing on the bipolar rectangular pulses output by the positive and negative pulse forming circuits. The magnetic shielding device is used to receive the bipolar rectangular pulses after noise reduction and DC blocking processing to achieve demagnetization of the magnetically shielded space.

[0006] Another aspect of this disclosure provides a wide-range pulse compensation device for magnetic shielding demagnetization, which includes the aforementioned wide-range pulse forming circuit for magnetic shielding space.

[0007] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces described in the above embodiments of this disclosure, by setting up identical and independent positive pulse forming circuits and negative pulse forming circuits, combined with multi-level Marx circuit modules of stacked boost units and switching timing control, achieves independent adjustment of the amplitude and pulse width of bipolar rectangular pulses. This allows it to adapt to the diverse demagnetization needs of magnetically shielded devices, broadening the circuit's applicability. The charging unit uses a continuous oscillation mode to boost charge the energy storage element, improving charging power and efficiency, reducing the requirements for the charging power supply, and meeting the high-power demands of multi-layered, complex-structured, multi-medium shielding materials during the demagnetization process of magnetically shielded devices, thus optimizing energy utilization efficiency.

[0008] In addition, by using a noise reduction and DC blocking module to process the output rectangular pulse, the noise interference problem of the power supply itself is effectively solved. At the same time, the design of the stacked boost unit reduces the influence of bias energy during demagnetization, thereby improving the stability and reliability of the demagnetization effect of the magnetic shielding device. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is an exemplary schematic diagram of an architecture for a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure;

[0011] Figure 2 This is an exemplary schematic diagram of a specific architecture of a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of this disclosure;

[0012] Figure 3 This is an exemplary schematic diagram of a specific architecture of a charging unit in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure.

[0013] Figure 4 This is an exemplary schematic diagram of a specific architecture of a stacked boost unit in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure;

[0014] Figure 5This is an exemplary schematic diagram of a positive pulse forming circuit 11 outputting a positive polarity rectangular pulse in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure.

[0015] Figure 6 This is an exemplary schematic diagram of a negative pulse forming circuit 12 outputting a negative polarity rectangular pulse in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure.

[0016] Figure 7 This is an exemplary schematic diagram of the charging of a positive pulse forming circuit 11 and a negative pulse forming circuit 12 in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of the present disclosure. Detailed Implementation

[0017] With the increasing application of magnetic shielding devices in large-scale precision equipment, the performance of the demagnetizing power supply for the shielding layer plays a crucial role in the shielding effect. It needs to meet stringent requirements such as high stability, wide parameter adjustment and low noise. The expansion of application scenarios has posed higher challenges to demagnetizing technology.

[0018] In related technologies, various pulse generation and demagnetization schemes are provided, mainly focusing on the demagnetization needs of equipment such as transformers and hydrogen atom frequency standards. Some schemes target transformer core demagnetization by providing oscillation voltage through screening energy storage capacitors, or by using a DC power supply to apply voltage three times (with the same amplitude and alternating polarity) to achieve demagnetization. Some schemes achieve bipolar pulse output through front-end capacitor energy storage and back-end full-bridge circuit switching or transformer polarity reversal, and some include leakage protection, demagnetization detection, or current regulation functions. Some schemes target transformer inrush current suppression by applying voltages of different polarities through measuring the hysteresis curve for demagnetization, and then remagnetizing through short circuit, no-load operation, etc. Some schemes can output nanosecond-level high voltage and microsecond-level low voltage coordinated pulses, or achieve bipolar multi-mode pulse magnetic field output through modular structure, focusing on the diverse adjustment of pulse parameters.

[0019] However, the following problems often exist in related technologies:

[0020] 1. The applicable scenarios are limited, mostly for equipment such as transformers, with low demagnetization requirements, and the stringent requirements of magnetic shielding devices for power supply noise and reverse voltage overshoot are not considered.

[0021] 2. Insufficient pulse parameter adjustment capability: The positive and negative voltages of bipolar pulses are mostly determined by the front-end energy storage, making it impossible to adjust the amplitude in real time and difficult to output demagnetizing waveforms with different pulse widths and amplitudes.

[0022] 3. The circuit structure and function are mismatched. It lacks noise reduction and DC blocking modules, reverse voltage suppression units and high-efficiency charging circuits for magnetic shielding devices. It cannot meet the high-power demagnetization requirements of multi-layer, complex structure and multi-medium shielding materials magnetic shielding devices. Moreover, the noise and bias energy of the power supply itself can easily affect the demagnetization effect.

[0023] To address the aforementioned problems, various embodiments of this disclosure provide a wide-range pulse forming circuit for a magnetically shielded space. The circuit includes: a positive pulse forming circuit, a negative pulse forming circuit, a noise reduction and DC blocking module, and a magnetic shielding device. The output terminals of both the positive and negative pulse forming circuits are connected to the noise reduction and DC blocking module, which in turn is connected to the magnetic shielding device. The positive and negative pulse forming circuits have identical and independent structures, each including a charging unit and a stacked boost unit. The output terminal of the charging unit is connected to the input terminal of the stacked boost unit. The charging unit is used to boost and charge the energy storage element of the stacked boost unit through a continuous oscillation mode. The stacked boost unit is composed of multi-stage Marx circuit modules, used to achieve parallel charging and series discharging of the energy storage element through switching timing control, outputting a bipolar rectangular pulse with independently adjustable amplitude and pulse width. The noise reduction and DC blocking module is used to perform noise reduction and DC blocking processing on the bipolar rectangular pulses output by the positive and negative pulse forming circuits. The magnetic shielding device is used to receive the noise-reduced and DC-blocked bipolar rectangular pulses to demagnetize the magnetically shielded space.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0025] Please refer to Figure 1 , Figure 1 This is an exemplary schematic diagram of an architecture for a wide-range pulse forming circuit for a magnetically shielded space, according to an embodiment of this disclosure. Figure 1 As shown, the wide-range pulse forming circuit 10 for magnetically shielded space includes: a positive pulse forming circuit 11, a negative pulse forming circuit 12, a noise reduction and DC blocking module 13, and a magnetic shielding device 14. The output terminals of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are both connected to the noise reduction and DC blocking module 13, which is then connected to the magnetic shielding device 14.

[0026] In this embodiment, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 form a pulse generating unit. Through the independent operation and coordinated control of the positive pulse forming circuit 11 and the negative pulse forming circuit 12, a bipolar rectangular pulse can be output. After the noise reduction and DC blocking module 13 processes the pulse signal, it is transmitted to the magnetic shielding device 14 to achieve efficient demagnetization of the magnetic shielding space.

[0027] The noise reduction and DC blocking module 13 is connected between the pulse generating unit and the magnetic shielding device 14 to suppress noise interference from the power supply itself and isolate DC bias. The magnetic shielding device 14, as the target of pulse demagnetization, receives bipolar rectangular pulses after noise reduction and DC blocking from the noise reduction and DC blocking module 13, and demagnetizes its own shielding layer through the pulse magnetic field.

[0028] Please refer to Figure 2 , Figure 2 This is an exemplary schematic diagram of another architecture for a wide-range pulse forming circuit for a magnetically shielded space, according to an embodiment of this disclosure. Figure 2 As shown, in the wide-range pulse forming circuit 20 for the magnetically shielded space, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 have the same structure and are independent of each other, both including a charging unit and a stacked boost unit. The output terminal of the charging unit in the positive pulse forming circuit 11 is connected to the input terminal of the stacked boost unit. The charging unit is used to boost and charge the energy storage element of the stacked boost unit through a continuous oscillation mode. The stacked boost unit is composed of multi-stage Marx circuit modules and is used to achieve parallel charging and series discharging of the energy storage element through switching timing control, outputting a bipolar rectangular pulse with independently adjustable amplitude and pulse width. Similarly, the output terminal of the charging unit in the negative pulse forming circuit 12 is connected to the input terminal of the stacked boost unit. The charging unit is used to boost and charge the energy storage element of the stacked boost unit through a continuous oscillation mode. The stacked boost unit is composed of multi-stage Marx circuit modules.

[0029] In this embodiment, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 have the same structure, both including a charging unit and a stacked boost unit, and the charging units included in the positive pulse forming circuit 11 and the negative pulse forming circuit 12 also have the same structure.

[0030] Furthermore, both the positive pulse forming circuit 11 and the negative pulse forming circuit 12 include multi-stage Marx circuit modules in their stacked boost units, and each Marx circuit module has the same structure. It can be understood that the number of multi-stage Marx circuit modules included in the stacked boost units of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 is different.

[0031] For example, the stacked boost unit of the positive pulse forming circuit 11 may include a 5-stage Marx circuit module, while the stacked boost unit of the negative pulse forming circuit 12 may include a 2-stage Marx circuit module.

[0032] The positive pulse forming circuit 11 and the negative pulse forming circuit 12 are independent of each other. Both the positive pulse forming circuit 11 and the negative pulse forming circuit 12 have the ability to emit rectangular pulses to the magnetic shielding device 14. The positive pulse forming circuit 11 emits positive rectangular pulses to the magnetic shielding device 14, and the negative pulse forming circuit 12 emits negative rectangular pulses to the magnetic shielding device 14.

[0033] In addition, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 have the ability to be charged independently.

[0034] For example, the positive pulse forming circuit 11 emits a positive rectangular pulse to the magnetic shielding device 14, while the negative pulse forming circuit 12 is charged; or, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are charged simultaneously.

[0035] Furthermore, the continuous oscillation mode refers to the charging unit using specific timing control to periodically switch between energy storage and release, forming continuous energy oscillation, thereby gradually increasing the charging voltage.

[0036] The continuous oscillation mode can effectively improve the charging power and ensure that sufficient energy is provided to the energy storage elements of the stacked boost unit. It is especially suitable for scenarios that require fast and efficient charging (such as repeated charging and demagnetizing stages), and ultimately achieves boost charging of the energy storage elements, providing sufficient energy reserves for subsequent pulse formation.

[0037] Furthermore, the stacked boost unit is used to control the on / off state of switches in each stage of the Marx circuit module through switching timing, so that each energy storage element in each stage of the Marx circuit module can be connected to the charging circuit in parallel to receive energy from the charging unit and achieve synchronous energy storage; and to make each energy storage element form a series circuit to boost the output pulse voltage; at the same time, the pulse amplitude can be changed by adjusting the voltage input to the charging unit, and the pulse width can be adjusted by controlling the on-time of the switch, thereby achieving independent adjustment of amplitude and pulse width.

[0038] The noise reduction and DC blocking module 13 is used to perform noise reduction and DC blocking processing on the bipolar rectangular pulses output by the positive pulse forming circuit 11 and the negative pulse forming circuit 12.

[0039] In this embodiment, the noise reduction and DC blocking module 13 suppresses the noise of the power supply itself carried in the output pulses of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 through circuit design, thereby reducing the interference of noise on the demagnetization effect of the magnetic shielding device 14 and isolating the DC bias energy in the output pulse to avoid the bias energy affecting the stability of the demagnetization process.

[0040] The magnetic shielding device 14 is used to receive bipolar rectangular pulses after noise reduction and DC blocking processing, so as to demagnetize the magnetic shielding space.

[0041] The wide-range pulse forming circuit and apparatus for magnetic shielding spaces described in the above embodiments of this disclosure, by setting up a positive pulse forming circuit 11 and a negative pulse forming circuit 12 with identical and independent structures, combined with a multi-level Marx circuit module of a stacked boost unit and switching timing control, achieves independent adjustment of the amplitude and pulse width of the bipolar rectangular pulse. This allows it to adapt to the diverse demagnetization requirements of the magnetic shielding device 14, broadening the circuit's applicability. The charging unit uses a continuous oscillation mode to boost charge the energy storage element, improving charging power and efficiency, reducing the requirements for the charging power supply, and meeting the high power requirements of multi-layered, complex-structured, multi-medium shielding materials in the demagnetization process, thus optimizing energy utilization efficiency. The noise reduction and DC blocking module 13 processes the output rectangular pulse, effectively solving the noise interference problem of the power supply itself. Simultaneously, the design of the stacked boost unit reduces the influence of bias energy during demagnetization, improving the stability and reliability of the demagnetization effect of the magnetic shielding device 14.

[0042] In one possible implementation of the above embodiments, please refer to Figure 3 , Figure 3 This is an exemplary schematic diagram of a specific architecture of a charging unit in a wide-range pulse forming circuit for a magnetically shielded space, according to an embodiment of this disclosure. Figure 3 As shown, the charging unit includes a charger, a charging control switch, a charging inductor, and a front-end energy storage capacitor; the first terminal of the charger is connected to the input terminal of the charging control switch, and the second terminal of the charger is grounded; the output terminal of the charging control switch is connected to the input terminal of the charging inductor, the output terminal of the charging inductor is connected to the input terminal of the front-end energy storage capacitor, and the output terminal of the front-end energy storage capacitor is connected to the input terminal of the energy storage element of the stacked boost unit.

[0043] In this embodiment, the charger acts as a power source, with its first terminal outputting electrical energy to the input terminal of the charging control switch, and its second terminal directly grounded as a circuit reference point.

[0044] The output of the charging control switch is connected in series with the charging inductor. Electrical energy is transmitted through the charging inductor to the input of the front-end energy storage capacitor, and finally the output of the front-end energy storage capacitor supplies power to the energy storage elements of the stacked boost unit.

[0045] Here, the above series structure ensures that electrical energy is transmitted along the path of "charger → charging control switch → charging inductor → front-end energy storage capacitor → stacked boost unit", and the ground terminal of the charger provides a potential reference for the entire charging circuit.

[0046] Furthermore, the charger has a built-in DC power module that provides the DC power required for charging.

[0047] The charging control switch regulates the operating state of the charging inductor by adjusting its switching frequency and duty cycle. When the switching frequency and duty cycle are adjusted to specific values, the charging inductor is always in a state of continuous energy storage and release, i.e., continuous charging. In this state, the charging inductor gradually increases the voltage through periodic energy storage oscillations, which, together with the front-end energy storage capacitor, stores energy and provides stable and sufficient charging power to the energy storage elements of the stacked boost unit. Especially during the repeated saturation charging and demagnetizing phases, it can meet the high-power charging requirements.

[0048] Among them, the front-end energy storage capacitor is used to temporarily store the boosted electrical energy and provide charging energy for the energy storage elements of the stacked boost unit.

[0049] Through the wide-range pulse forming circuit and apparatus for magnetically shielded spaces described in the above embodiments of this disclosure, the charging control switch adjusts the switching frequency and duty cycle to enable the charging inductor to enter a continuous charging state. Voltage boost is achieved by utilizing the periodic energy storage oscillation of the inductor, enabling higher charging voltages at lower input voltages, reducing voltage requirements on the charger, and improving the flexibility of charging power adjustment. The front-end energy storage capacitor temporarily stores the boosted energy and can release energy according to the needs of the stacked boost units. Especially during the repeated saturation charging and demagnetizing phase, it provides continuous and stable high-power support to the stacked boost units, avoiding pulse parameter fluctuations caused by insufficient energy supply, thereby ensuring stability and continuity during the demagnetizing process.

[0050] In one possible implementation of the above embodiments, please refer to Figure 4 , Figure 4 This is an exemplary schematic diagram of a specific architecture of a stacked boost unit in a wide-range pulse forming circuit for a magnetically shielded space, according to an embodiment of this disclosure. Figure 4 As shown, the stacked boost unit includes multiple Marx circuit modules; the multiple Marx circuit modules are connected in series, and each single Marx circuit module in the multiple Marx circuit modules includes an energy storage element, a discharge control switch and a charging circuit switch; the discharge control switch is used to control the discharge sequence of the energy storage element, and the series discharge of the energy storage element in each single Marx circuit module is realized through the coordinated action of multiple switches; the charging circuit switch is used to control the parallel charging process of the energy storage element in each single Marx circuit module by the charging unit.

[0051] In this embodiment, the stacked boost unit also includes an isolation diode, which is disposed between two adjacent single-stage Marx circuit modules to achieve electrical isolation between each single-stage Marx circuit module.

[0052] In the stacked boost unit, each stage of the Marx circuit module is connected in series. The output of the previous stage Marx circuit module is connected to the input of the next stage Marx circuit module through an isolation diode, forming a cascaded structure.

[0053] In each stage of the Marx circuit module, the energy storage element, as the energy storage carrier, is the core component for charging and discharging.

[0054] Specifically, when the positive pulse forming circuit 11 and / or the negative pulse forming circuit 12 are charging, the charging circuit switches between each level of the Marx circuit modules are closed. The energy storage elements in each level of the Marx circuit modules are connected in parallel through the charging circuits to receive electrical energy from the charging unit, thus achieving uniform charging. At this time, the voltage of the energy storage elements in each level of the Marx circuit modules is consistent.

[0055] Here, it is understood that during the charging process of the positive pulse forming circuit 11 and / or the negative pulse forming circuit 12, the charging circuit switch in the last stage Marx circuit module of the positive pulse forming circuit 11 and / or the negative pulse forming circuit 12 must be disconnected to prevent the charging current from forming an additional circuit with the noise reduction and DC blocking module 13 and the magnetic shielding device 14 through the charging circuit switch. This would cause some of the charging energy to flow directly to the magnetic shielding device 14 without being stored by the energy storage element, resulting in a decrease in charging efficiency and insufficient energy storage. It may also affect the accuracy of subsequent pulse output due to premature activation of the demagnetizing coil.

[0056] When the positive pulse forming circuit 11 or the negative pulse forming circuit 12 discharges (i.e., when a rectangular pulse is output), the discharge control switch of each level of the Marx circuit module on the discharging side is closed, and the charging circuit switch of each level of the Marx circuit module on the discharging side is opened; and the discharge control switch of each level of the Marx circuit module on the non-discharging side is opened, and the charging circuit switch of each level of the Marx circuit module on the non-discharging side is closed.

[0057] Here, the energy storage elements in each level of the Marx circuit module of the discharge side are connected in series, and the pulse voltage is increased by superimposing multiple voltage levels.

[0058] For example, suppose a stacked boost unit includes two stages of Marx circuit modules, each with a charged energy storage element voltage of 100V. During the charging phase, the two energy storage elements are connected in parallel and both are charged to 100V, at which point the total voltage of the stacked boost unit remains 100V. During the discharging phase, the two 100V energy storage elements that were originally connected in parallel are connected in series, and the total voltage is superimposed to 200V. Through series superposition, the pulse voltage is boosted from 100V to 200V, ultimately outputting a high-amplitude 200V pulse.

[0059] Furthermore, the number of Marx circuit modules in the positive pulse forming circuit 11 and the negative pulse forming circuit 12 can be increased or decreased to flexibly adapt to the pulse amplitude requirements of different magnetic shielding devices and achieve wide-range adjustment.

[0060] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces disclosed in the above embodiments utilizes a multi-stage cascaded Marx circuit module. During discharge, the energy storage elements form a series relationship, significantly increasing the pulse voltage amplitude through voltage superposition. Furthermore, the Marx circuit modules can be added or removed, flexibly adapting to the pulse amplitude requirements of different magnetic shielding devices and achieving wide-range adjustment. During charging, the energy storage elements at each stage are connected in parallel to receive uniform electrical energy, ensuring consistent voltage and providing a stable energy foundation for discharge. During discharge, the energy storage elements are connected in series through switching timing control, reducing energy loss and improving the stability and accuracy of pulse output. Isolation diodes between adjacent Marx circuit modules provide electrical isolation, avoiding inter-stage interference and reducing the risk of circuit failure. Simultaneously, the design of the charging circuit switch being disconnected in the last stage Marx circuit module during charging prevents charging current from accidentally entering the magnetic shielding device, avoiding energy waste and premature activation of the demagnetizing coil, ensuring the accuracy of subsequent pulse output.

[0061] In one possible implementation of the above embodiments, the first port of the noise reduction and DC blocking module 13 connected to the positive pulse forming circuit 11 is the input terminal when the positive pulse forming circuit 11 outputs a positive rectangular pulse; the second port of the noise reduction and DC blocking module 13 connected to the negative pulse forming circuit 12 is the output terminal when the positive pulse forming circuit 11 outputs a positive rectangular pulse.

[0062] The second port of the noise reduction and DC blocking module 13 connected to the negative pulse forming circuit 12 is the input terminal when the negative pulse forming circuit 12 outputs a negative rectangular pulse; the first port of the noise reduction and DC blocking module 13 connected to the positive pulse forming circuit 11 is the output terminal when the negative pulse forming circuit 12 outputs a negative rectangular pulse.

[0063] In this embodiment, when the positive pulse forming circuit 11 outputs a positive rectangular pulse, the first port serves as the input terminal to receive the positive rectangular pulse. After being processed by the noise reduction and DC blocking module 13, the pulse is transmitted to the magnetic shielding device 14. After being processed by the magnetic shielding device 14, the positive rectangular pulse flows back to the noise reduction and DC blocking module 13 and is then transmitted to the negative pulse forming circuit 12 through the second port, which serves as the output terminal.

[0064] When the negative pulse forming circuit 12 outputs a negative rectangular pulse, the second port serves as the input terminal to receive the negative rectangular pulse. After being processed by the noise reduction and DC blocking module 13, it is transmitted to the magnetic shielding device 14. After being processed by the magnetic shielding device 14, the negative rectangular pulse flows back to the noise reduction and DC blocking module 13, and then is transmitted to the positive pulse forming circuit 11 through the first port, which serves as the output terminal.

[0065] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces described in the above embodiments of this disclosure, through dynamic switching of the port roles of the noise reduction and DC blocking module 13, ensures that both positive and negative polarity pulses can flow through the noise reduction and DC blocking module 13 for noise reduction and DC blocking processing, reducing the interference of power supply noise and bias energy on the demagnetization effect. The port switching mechanism allows the same noise reduction and DC blocking module 13 to adapt to different transmission paths of bipolar pulses, simplifying the circuit structure, while ensuring that the pulse signal is transmitted to the magnetic shielding device 14 in the expected direction, guaranteeing the continuity and accuracy of the demagnetization process.

[0066] In one possible implementation of the above embodiments, please refer to Figure 5 , Figure 5 This is an exemplary schematic diagram of a positive pulse forming circuit 11 outputting a positive polarity rectangular pulse in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of this disclosure. Taking an example where the number of Marx circuit modules is two, as shown... Figure 5 As shown, where:

[0067] When the positive pulse forming circuit 11 outputs a positive rectangular pulse, the charging control switch in the positive pulse forming circuit 11 is open, the discharge control switch in each single-stage Marx circuit module in the stacked boost unit is closed, and the charging circuit switch is open; the output terminal of the energy storage element in each single-stage Marx circuit module is connected to the input terminal of the discharge control switch, and the output terminal of the discharge control switch is connected to the input terminal of the energy storage element in the next stage Marx circuit module; the output terminal of the discharge control switch in the last stage Marx circuit module is connected to the input terminal of the noise reduction and DC blocking module 13.

[0068] In the negative pulse forming circuit 12, the charging control switch is open; in each single-stage Marx circuit module of the stacked boost unit, the discharge control switch is open; and the charging circuit switch is closed. The input terminal of the charging circuit switch in the last stage Marx circuit module is connected to the output terminal of the noise reduction and DC blocking module 13. The output terminal of the charging circuit switch in each single-stage Marx circuit module is connected to the input terminal of the charging circuit switch in the previous stage Marx circuit module. The output terminal of the charging circuit switch in the first stage Marx circuit module is connected to the ground terminal of the charger of the negative pulse forming circuit 12.

[0069] In this embodiment, as Figure 5 As shown, taking a Marx circuit module quantity of 2 as an example, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are respectively equipped with two levels of Marx circuit modules. That is, the stacked boost unit in the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are each equipped with 2 energy storage elements, 2 discharge control switches and 2 charging circuit switches.

[0070] For ease of explanation, the charger in the positive pulse forming circuit 11 is named UA0, the charging control switch is named MA0, the charging inductor is named LA0, and the front-end energy storage capacitor is named CA0; the energy storage element in the first-stage Marx circuit module is named CA1, the discharge control switch is named MA1, and the charging circuit switch is named MA3; the energy storage element in the second-stage Marx circuit module is named CA2, the discharge control switch is named MA2, and the charging circuit switch is named MA4.

[0071] The charger in the negative pulse forming circuit 12 is named UB0, the charging control switch is named MB0, the charging inductor is named LB0, and the front-end energy storage capacitor is named CB0; the energy storage element in the first-stage Marx circuit module is named CB1, the discharge control switch is named MB1, and the charging circuit switch is named MB3; the energy storage element in the second-stage Marx circuit module is named CB2, the discharge control switch is named MB2, and the charging circuit switch is named MB4.

[0072] Here, as Figure 5 As shown, when the positive pulse forming circuit 11 outputs a positive rectangular pulse, the charging control switch MA0 in the positive pulse forming circuit 11 is open, the discharge control switches MA1 and MA2 in the 2-stage Marx circuit module of the stacked boost unit are closed, and the charging circuit switches MA3 and MA4 are open; the output terminal of the energy storage element CA1 is connected to the input terminal of the discharge control switch MA1, the output terminal of the discharge control switch MA1 is connected to the input terminal of the energy storage element CA2; the output terminal of the energy storage element CA2 is connected to the input terminal of the discharge control switch MA2, and the output terminal of the discharge control switch MA2 is connected to the noise reduction and DC blocking module 13;

[0073] In the negative pulse forming circuit 12, the charging control switch MB0 is open; in the stacked boost unit, the discharge control switches MB1 and MB2 in the second-stage Marx circuit module are open; and the charging circuit switches MB3 and MB4 are closed. The input terminal of the charging circuit switch MB4 in the second-stage Marx circuit module is connected to the output terminal of the noise reduction and DC blocking module 13. The input terminal of the charging circuit switch MB3 in the first-stage Marx circuit module is connected to the output terminal of the charging circuit switch MB4, and the output terminal of the charging circuit switch MB3 is connected to the ground terminal of the charger UB0.

[0074] Furthermore, in the positive pulse forming circuit 11, the energy storage element CA1 forms a series circuit with the energy storage element CA2 through the discharge control switch MA1. The energy storage elements CA1 and CA2 are superimposed to output a positive rectangular pulse, which is output to the noise reduction and DC blocking module 13 through the discharge control switch MA2. In the negative pulse forming circuit 12, the charging circuit switches MB3 and MB4 form a series circuit to transmit the positive rectangular pulse to the ground terminal of the charger UB0.

[0075] Furthermore, such as Figure 5 As shown, when the positive pulse forming circuit 11 outputs a positive rectangular pulse, the current flow direction is as follows: Figure 5 As shown by the dashed arrow, the energy is output from the energy storage element CA1, flows through the discharge control switch MA1, the energy storage element CA2 and the discharge control switch MA2 into the noise reduction and DC blocking module 13, and then enters the magnetic shielding device 14 through the noise reduction and DC blocking module 13; after flowing out of the magnetic shielding device 14, it flows into the grounding terminal of the charger UB0 along the charging circuit switch MB4 and the charging circuit switch MB3.

[0076] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces disclosed in the above embodiments of this invention, in the positive pulse forming circuit 11, the energy storage elements of the multi-stage Marx circuit are connected in series through a discharge control switch, and a high-amplitude positive rectangular pulse is output using the voltage superposition effect, which meets the requirements of multi-layered, complex-structured, multi-dielectric shielding devices for demagnetizing pulse amplitude. In the negative pulse forming circuit 12, the charging circuit switch is closed to form a series circuit, providing a return path for the positive pulse current, ensuring effective pulse energy transmission and closed-loop circuit operation, and avoiding current turbulence from affecting system stability. By controlling the on / off state of the discharge control switch and combining the energy storage characteristics of the energy storage elements, the amplitude of the output pulse can be flexibly adjusted to adapt to the diverse requirements of pulse parameters during the demagnetization process of the magnetic shielding device, achieving the effect of adjustable pulse amplitude and width.

[0077] In one possible implementation of the above embodiments, please refer to Figure 6 , Figure 6 This is an exemplary schematic diagram of a negative pulse forming circuit 12 outputting a negative polarity rectangular pulse in a wide-range pulse forming circuit for a magnetically shielded space, according to an embodiment of this disclosure. Taking an example where the number of Marx circuit modules is two, as shown... Figure 6 As shown, where:

[0078] When the negative pulse forming circuit 12 outputs a negative polarity rectangular pulse, the charging control switch in the negative pulse forming circuit 12 is turned off, the discharge control switch in each single-stage Marx circuit module in the stacked boost unit is closed, and the charging circuit switch is turned off; the output terminal of the energy storage element in each single-stage Marx circuit module is connected to the input terminal of the discharge control switch, and the output terminal of the discharge control switch is connected to the input terminal of the energy storage element in the next stage Marx circuit module; the output terminal of the discharge control switch in the last stage Marx circuit module is connected to the input terminal of the noise reduction and DC blocking module 13.

[0079] In the positive pulse forming circuit 11, the charging control switch is open, the discharge control switch in each single-stage Marx circuit module in the stacked boost unit is open, and the charging circuit switch is closed; the input terminal of the charging circuit switch in the last stage Marx circuit module is connected to the output terminal of the noise reduction and DC blocking module 13; the output terminal of the charging circuit switch in each single-stage Marx circuit module is connected to the input terminal of the charging circuit switch in the previous stage Marx circuit module; the output terminal of the charging circuit switch in the first stage Marx circuit module is connected to the ground terminal of the charger in the positive pulse forming circuit 11.

[0080] In this embodiment, as Figure 6 As shown, taking a Marx circuit module quantity of 2 as an example, the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are respectively equipped with two levels of Marx circuit modules. That is, the stacked boost unit in the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are each equipped with 2 energy storage elements, 2 discharge control switches and 2 charging circuit switches.

[0081] Continue to use Figure 5 Naming rules in, such as Figure 6 As shown, when the negative pulse forming circuit 12 outputs a negative polarity rectangular pulse, the charging control switch MB0 in the negative pulse forming circuit 12 is open, the discharge control switches MB1 and MB2 in the 2-stage Marx circuit module of the stacked boost unit are closed, and the charging circuit switches MB3 and MB4 are open; the output terminal of the energy storage element CB1 is connected to the input terminal of the discharge control switch MB1, and the output terminal of the discharge control switch MB1 is connected to the input terminal of the energy storage element CB2; the output terminal of the energy storage element CB2 is connected to the input terminal of the discharge control switch MB2, and the output terminal of the discharge control switch MB2 is connected to the noise reduction and DC blocking module 13;

[0082] In the positive pulse forming circuit 11, the charging control switch MA0 is open; in the stacked boost unit, the discharge control switches MA1 and MA2 in the second-stage Marx circuit module are open; and the charging circuit switches MA3 and MA4 are closed. The input terminal of the charging circuit switch MA4 in the second-stage Marx circuit module is connected to the output terminal of the noise reduction and DC blocking module 13. The input terminal of the charging circuit switch MA3 in the first-stage Marx circuit module is connected to the output terminal of the charging circuit switch MA4, and the output terminal of the charging circuit switch MA3 is connected to the ground terminal of the charger UA0.

[0083] Furthermore, such as Figure 6 As shown, when the negative pulse forming circuit 12 outputs a positive rectangular pulse, the current flow direction is as follows: Figure 6 As shown by the dashed arrow, the energy is output from the energy storage element CB1, flows through the discharge control switch MB1, the energy storage element CB2 and the discharge control switch MB2 into the noise reduction and DC blocking module 13, and then enters the magnetic shielding device 14 through the noise reduction and DC blocking module 13; after flowing out of the magnetic shielding device 14, it flows into the grounding terminal of the charger UA0 along the charging circuit switch MA4 and the charging circuit switch MA3.

[0084] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces disclosed in the above embodiments of this invention, in the negative pulse forming circuit 12, the energy storage elements of the multi-stage Marx circuit are connected in series through a discharge control switch, and a high-amplitude negative polarity rectangular pulse is output using the voltage superposition effect, which meets the requirements of multi-layered, complex-structured, multi-dielectric shielding devices for demagnetizing pulse amplitude. In the positive pulse forming circuit 11, the charging circuit switch is closed to form a series circuit, providing a return path for the negative pulse current, ensuring effective pulse energy transmission and closed-loop circuit operation, and avoiding current turbulence from affecting system stability. By controlling the on / off state of the discharge control switch and combining the energy storage characteristics of the energy storage elements, the amplitude of the output pulse can be flexibly adjusted to adapt to the diverse requirements of pulse parameters during the demagnetization process of the magnetic shielding device, achieving the effect of adjustable pulse amplitude and width.

[0085] In one possible implementation of the above embodiments, when the positive pulse forming circuit 11 or the negative pulse forming circuit 12 is charging, the charging control switch is closed, the discharge control switch of each single-stage Marx circuit module in the stacked boost unit is open, the charging circuit switch between two adjacent single-stage Marx circuit modules is closed, and the charging circuit switch of the last stage Marx circuit module is open.

[0086] The front-end energy storage capacitor and the energy storage elements of each single-stage Marx circuit module are connected in parallel with the charger for charging.

[0087] In this embodiment, please refer to Figure 7 , Figure 7This is an exemplary schematic diagram of the charging of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 in a wide-range pulse forming circuit for a magnetically shielded space according to an embodiment of this disclosure. Continuing with the example of two Marx circuit modules, and further using... Figure 5 Naming rules in, such as Figure 7 As shown, where:

[0088] In the positive pulse forming circuit 11, the charging control switch MA0 is closed, the charging circuit switch MA3 between the two Marx circuit modules is closed, the remaining charging circuit switches (i.e., MA4) are open, and each discharge control switch (i.e., MA1 and MA3) is also open.

[0089] At this time, energy storage elements CA1 and CA2 are charged in parallel with the front-end energy storage capacitor CA0.

[0090] In the negative pulse forming circuit 12, the charging control switch MB0 is closed, the charging circuit switch MB3 between the two Marx circuit modules is closed, the remaining charging circuit switches (i.e., MB4) are open, and each discharge control switch (i.e., MB1 and MB3) is also open.

[0091] At this time, energy storage elements CB1 and CB2 are charged in parallel with the front-end energy storage capacitor CB0.

[0092] Furthermore, such as Figure 7 As shown, when the positive pulse forming circuit 11 and the negative pulse forming circuit 12 are charging, the current flows in the following direction: Figure 7 As indicated by the dashed arrow.

[0093] Through the wide-range pulse forming circuit and apparatus for magnetically shielded spaces described in the above embodiments of this disclosure, the front-end energy storage capacitor and the energy storage elements of each stage of the Marx circuit module are charged in parallel, ensuring that the voltage of each energy storage element is the same, providing a stable basis for voltage superposition during subsequent discharge, and avoiding pulse parameter deviations caused by uneven energy distribution. The discharge control switch is disconnected to prevent accidental energy release during charging, and the last-stage charging circuit switch is disconnected to prevent current from accidentally entering subsequent modules or the magnetic shielding device, reducing energy loss and interference; the positive and negative pulse circuits are charged independently to ensure the independence of the bipolar pulse output.

[0094] In one possible implementation of the above embodiments, the energy storage element is a supercapacitor matrix.

[0095] In this embodiment, the energy storage element adopts a supercapacitor matrix, which can be an energy storage unit composed of multiple supercapacitors in a specific combination.

[0096] Here, supercapacitors have the characteristics of high power density, fast charging and discharging speed, and long cycle life. Furthermore, by adopting a matrix form, the total capacitance and energy storage capacity can be flexibly adjusted according to the demagnetization requirements of the magnetic shielding device, so as to adapt to voltage drop control under different current requirements.

[0097] The wide-range pulse forming circuit and apparatus for magnetically shielded spaces described in the above embodiments of this disclosure, through the matrix combination of supercapacitors, can adjust the total energy storage capacity according to the diverse requirements of pulse amplitude and pulse width during the demagnetization process, meeting the power requirements of different magnetic shielding devices and adapting to a wide range of pulse parameter adjustments. The rapid charging and discharging characteristics of supercapacitors, combined with the matrix structure, can quickly respond to the energy supply of the charging unit, providing stable energy support during repeated saturation charging and demagnetizing phases, ensuring the continuity and reliability of pulse output. Furthermore, the supercapacitor matrix is ​​better suited to the high-power, high-frequency charging and discharging scenarios during the demagnetization of magnetically shielded devices, reducing pulse waveform distortion caused by insufficient energy storage and improving the demagnetization effect.

[0098] In one possible implementation of the above embodiment, the noise reduction and DC blocking module 13 further includes a reverse overvoltage suppression component; the reverse overvoltage suppression component is used to suppress reverse voltage overshoot when the polarity of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 is switched.

[0099] In this embodiment, the reverse overvoltage suppression component can be a preset large resistor connected in parallel with the noise reduction and DC blocking module 13. The preset large resistor consumes the energy of the reverse voltage overshoot, so as to suppress the reverse voltage overshoot when the polarity of the positive pulse forming circuit 11 and the negative pulse forming circuit 12 switches.

[0100] For example, the preset large resistance value can be more than 1,000 times the coil resistance in the magnetic shielding device 14.

[0101] Through the wide-range pulse forming circuit and apparatus for magnetically shielded space of the above embodiments of this disclosure, the reverse overvoltage suppression component can effectively suppress reverse voltage overshoot during polarity switching, prevent excessive voltage from damaging the switching devices, energy storage elements, etc. in the positive and negative pulse forming circuits, improve the reliability and service life of the entire device, and avoid affecting the demagnetization effect due to waveform distortion.

[0102] This invention also provides a magnetic shielding demagnetization wide-range pulse compensation device. The magnetic shielding demagnetization wide-range pulse compensation circuit of the above-described embodiments can be applied in the magnetic shielding demagnetization wide-range pulse compensation device as a hardware unit in the magnetic shielding demagnetization wide-range pulse compensation device.

[0103] Although embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A wide-range pulse forming circuit for magnetic shielding of a space, characterized in that, The circuit comprises a positive pulse forming circuit, a negative pulse forming circuit, a noise reduction and direct current blocking module and a magnetic shielding device, the output ends of the positive pulse forming circuit and the negative pulse forming circuit are connected with the noise reduction and direct current blocking module, and the noise reduction and direct current blocking module is connected with the magnetic shielding device; The positive pulse forming circuit and the negative pulse forming circuit are the same in structure and independent of each other, and each comprises a charging unit and a stacked voltage boosting unit; the output end of the charging unit is connected with the input end of the stacked voltage boosting unit; the charging unit is used for boosting charging of an energy storage element of the stacked voltage boosting unit through a continuous oscillation mode; the stacked voltage boosting unit is composed of a plurality of Marx circuit modules, and is used for realizing parallel charging and series discharging of the energy storage element through switch timing control and outputting a bipolar rectangular pulse with independently adjustable amplitude and pulse width; The noise reduction and direct current blocking module is used for noise reduction and direct current blocking processing of the bipolar rectangular pulse output by the positive pulse forming circuit and the negative pulse forming circuit; The magnetic shielding device is used for receiving the bipolar rectangular pulse after noise reduction and direct current blocking processing, so as to realize demagnetization of a magnetic shielding space. The charging unit comprises a charging machine, a charging control switch, a charging inductor and a front-end energy storage capacitor; the first end of the charging machine is connected with the input end of the charging control switch, and the second end of the charging machine is grounded; the output end of the charging control switch is connected with the input end of the charging inductor, the output end of the charging inductor is connected with the input end of the front-end energy storage capacitor, and the output end of the front-end energy storage capacitor is connected with the input end of the energy storage element of the stacked voltage boosting unit; The charging machine is internally provided with a direct current power module, which is used for providing direct current power required for charging; the charging control switch is used for controlling the charging inductor to enter a continuous charging state by adjusting a switch frequency and a duty cycle; the charging inductor and the charging control switch are matched to realize oscillation boosting and improve a charging voltage; and the front-end energy storage capacitor is used for temporarily storing the boosted power and providing charging energy for the energy storage element of the stacked voltage boosting unit.

2. The circuit of claim 1, wherein, The stacked voltage boosting unit comprises a plurality of Marx circuit modules; each single Marx circuit module in the plurality of Marx circuit modules comprises an energy storage element, a discharge control switch and a charging loop switch, wherein the discharge control switch and the charging loop switch in series are connected in parallel to the two ends of the energy storage element; for any two adjacent Marx circuit modules, the first end of the energy storage element in the front Marx circuit module is connected to the first end of the discharge control switch in the front Marx circuit module, and the second end of the discharge control switch in the front Marx circuit module is connected to the second end of the energy storage element in the rear Marx circuit module; the discharge control switch is used for controlling the discharge timing of the energy storage element, and the series discharging of the energy storage element in each single Marx circuit module is realized through multi-switch cooperative action; and the charging loop switch is used for controlling the parallel charging process of the energy storage element in each single Marx circuit module by the charging unit.

3. The circuit of claim 2, wherein, The stack voltage boosting unit further comprises an isolation diode arranged between two adjacent single-stage Marx circuit modules to realize electrical isolation between the single-stage Marx circuit modules.

4. The circuit of claim 2, wherein, The first port of the noise reduction and DC blocking module connected with the positive pulse forming circuit is an input end when the positive pulse forming circuit outputs a positive rectangular pulse; and the second port of the noise reduction and DC blocking module connected with the negative pulse forming circuit is an output end when the positive pulse forming circuit outputs the positive rectangular pulse. The second port of the noise reduction and DC blocking module connected with the negative pulse forming circuit is an input end when the negative pulse forming circuit outputs a negative rectangular pulse; and the first port of the noise reduction and DC blocking module connected with the positive pulse forming circuit is an output end when the negative pulse forming circuit outputs the negative rectangular pulse.

5. The circuit of any one of claims 1-4, wherein, When the positive pulse forming circuit outputs a positive rectangular pulse, the charge control switch in the positive pulse forming circuit is turned off, the discharge control switch in each single-stage Marx circuit module in the stack voltage boosting unit is turned on, and the charge loop switch is turned off. The output end of the energy storage element in each single-stage Marx circuit module is connected with the input end of the discharge control switch, and the output end of the discharge control switch is connected with the input end of the energy storage element in the next-stage Marx circuit module; and the output end of the discharge control switch in the last-stage Marx circuit module is connected with the input end of the noise reduction and DC blocking module. When the negative pulse forming circuit outputs a negative rectangular pulse, the charge control switch in the negative pulse forming circuit is turned off, the discharge control switch in each single-stage Marx circuit module in the stack voltage boosting unit is turned on, and the charge loop switch is turned off.

6. The circuit of claim 5, wherein, The output end of the energy storage element in each single-stage Marx circuit module is connected with the input end of the discharge control switch, and the output end of the discharge control switch is connected with the input end of the energy storage element in the next-stage Marx circuit module; and the output end of the discharge control switch in the last-stage Marx circuit module is connected with the input end of the noise reduction and DC blocking module. When the negative pulse forming circuit outputs a negative rectangular pulse, the charge control switch in the negative pulse forming circuit is turned off, the discharge control switch in each single-stage Marx circuit module in the stack voltage boosting unit is turned on, and the charge loop switch is turned off. The output end of the energy storage element in each single-stage Marx circuit module is connected with the input end of the discharge control switch, and the output end of the discharge control switch is connected with the input end of the energy storage element in the next-stage Marx circuit module; and the output end of the discharge control switch in the last-stage Marx circuit module is connected with the input end of the noise reduction and DC blocking module. The input end of the charging circuit switch in the last-stage Marx circuit module is connected with the output end of the noise reduction and direct current isolation module; the output end of the charging circuit switch in each single-stage Marx circuit module is connected with the input end of the charging circuit switch in the previous-stage Marx circuit module; and the output end of the charging circuit switch in the first-stage Marx circuit module is connected with the grounding end of the charging machine of the positive pulse forming circuit.

7. The circuit of claim 6, wherein, When the positive pulse forming circuit or the negative pulse forming circuit is charging, the charging control switch is closed, the discharge control switches of each single-stage Marx circuit module in the stacked voltage boosting unit are opened, the charging circuit switches between two adjacent single-stage Marx circuit modules are closed, and the charging circuit switch of the last-stage Marx circuit module is opened. The front-end energy storage capacitor and the energy storage elements of each single-stage Marx circuit module are connected in parallel with the charging machine.

8. The circuit of claim 7, wherein, The energy storage elements are super capacitor matrices.

9. The circuit of claim 1, wherein, The noise reduction and direct current isolation module further comprises a reverse overvoltage suppression component; the reverse overvoltage suppression component is used for suppressing reverse voltage overshoot when the positive pulse forming circuit and the negative pulse forming circuit switch polarity.

10. A magnetic shield degaussing wide range pulse compensation device, characterized by, The magnetic shielding and degaussing wide-range pulse compensation device comprises the wide-range pulse forming circuit for a magnetic shielding space according to any one of claims 1-9.

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