A wide-range pulse compensation circuit and device for magnetic shielding and demagnetization

Abstract

This disclosure relates to the field of magnetic shielding technology, and discloses a wide-range pulse compensation circuit and device for magnetic shielding demagnetization. A primary energy storage unit supplies power to a first energy storage element via a first charging element, and a first control element adjusts the charging speed of the first energy storage element. A power compensation unit charges a second energy storage element via a dual-pathway, and a second control element switches to achieve power compensation. A resonant modulation unit, through a third control element and a resonant adjustment module, maintains the underdamped oscillation of the demagnetizing coil and adjusts the resonant parameters, while the demagnetizing coil generates a demagnetizing pulse magnetic field. The primary energy storage unit adjusts the charging speed of the first energy storage element via the first control element, allowing for flexible adaptation to different operating modes. This satisfies the need for rapid energy replenishment after long-term idle periods, and also addresses scenarios of short-term repeated use and single large energy output, improving the circuit's energy storage adaptability and energy utilization efficiency.

Description

Technical Field

[0001] This invention relates to the field of magnetic shielding technology, specifically to a wide-range pulse compensation circuit and device for magnetic shielding demagnetization. Background Technology

[0002] With the widespread application of magnetic shielding technology in the field of precision equipment, the performance of the demagnetizing circuit, as a core component, directly affects the stability and reliability of the shielding effect. Its application scenarios are constantly expanding and facing more complex working conditions.

[0003] In related technologies, existing demagnetizing circuits often suffer from problems such as unadjustable energy storage and charging speed, oscillation parameters limited by a fixed load, and insufficient high-power compensation capability, making it difficult to adapt to diverse demagnetizing needs. Therefore, how to achieve wide-range parameter adjustability and efficient energy compensation in demagnetizing circuits has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of this, the present invention provides a magnetic shielding demagnetization wide-range pulse compensation circuit and device to solve the problem of how to achieve wide-range adjustable parameters and high-efficiency energy compensation of the demagnetization circuit.

[0005] This disclosure provides a wide-range pulse compensation circuit for magnetic shielding demagnetization. The circuit includes: a primary energy storage unit, a power compensation unit, and a resonant modulation unit. The output terminal of the primary energy storage unit is connected to the input terminal of the power compensation unit, and the output terminal of the power compensation unit is connected to the input terminal of the resonant modulation unit. The primary energy storage unit includes a first charging element, a first control element, and a first energy storage element. The first charging element supplies power to the first energy storage element, and the first control element adjusts the charging speed of the first energy storage element. The power compensation unit includes a second charging element, a second control element, and a second energy storage element. The second charging element and the primary energy storage unit respectively form two paths for charging the second energy storage element. The second control element controls the switching of the second energy storage element to achieve power compensation of the resonant modulation unit by the first or second energy storage element. The resonant modulation unit includes a third control element, a resonant adjustment module, and a demagnetizing coil. The third control element cooperates with the resonant adjustment module to adjust the resonant parameters of the demagnetizing coil under the premise of underdamped oscillation. The demagnetizing coil generates a demagnetizing pulse magnetic field.

[0006] In another aspect, this disclosure provides a magnetic shielding demagnetization wide-range pulse compensation device, which includes the aforementioned magnetic shielding demagnetization wide-range pulse compensation circuit.

[0007] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, the primary energy storage unit adjusts the charging speed of the first energy storage element through the first control element, which can flexibly adapt to different working modes. It can meet the needs of rapid energy replenishment after long-term idleness, and can also cope with short-term repeated use and single large energy output scenarios, thereby improving the energy storage adaptability and energy utilization efficiency of the circuit. The power compensation unit innovatively adopts a dual charging path design. The second charging element and the primary energy storage unit respectively supply power to the second energy storage element. With the switching control of the second energy storage element by the second control element, the first energy storage element and the second energy storage element can compensate energy to the resonant modulation unit as needed, realizing rapid and stable energy replenishment in high-power scenarios and ensuring the continuous and efficient operation of the demagnetization process.

[0008] Furthermore, through the coordinated operation of the third control element and the resonance adjustment module, the resonant modulation unit can adjust the resonance parameters over a wide range while ensuring that the demagnetizing coil is in an underdamped oscillation state. This allows for flexible adaptation to different demagnetizing needs and improves the accuracy and applicability of the demagnetizing effect. 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 the architecture of a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure;

[0011] Figure 2 This is an exemplary schematic diagram of the specific architecture of the primary energy storage unit 101 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure.

[0012] Figure 3 This is an exemplary schematic diagram of the specific architecture of the power compensation unit 102 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure;

[0013] Figure 4 This is an exemplary schematic diagram of another architecture of a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure;

[0014] Figure 5 This is an exemplary schematic diagram of the specific architecture of the resonant modulation unit 103 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure;

[0015] Figure 6This is an exemplary schematic diagram of the architecture of another magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of the present disclosure. Detailed Implementation

[0016] With the widespread application of magnetic shielding technology in the field of precision equipment, the performance of the demagnetizing circuit, as a core component, directly affects the stability and reliability of the shielding effect. Its application scenarios are constantly expanding and facing more complex working conditions.

[0017] In the first related technology, a compensated pulse demagnetizing circuit and method are disclosed. The energy storage capacitor in the resistor-inductor-capacitor (RLC) second-order oscillating circuit is used to charge the demagnetizing coil in the shielding device. When the current reaches the saturation region of the shielding material, the energy storage capacitor is cut off. Then, the oscillating capacitor is put into the discharge circuit to realize inductive energy storage. The RLC second-order oscillating circuit is adjusted to be in an underdamped state, and a pulse current is generated in the demagnetizing coil. The shielding material is repeatedly magnetized by the magnetic field generated by the pulse current to achieve demagnetization.

[0018] However, the first related technology has the following problems:

[0019] 1. Using a combination of switches and diodes during the energy storage capacitor charging stage can only control whether the energy storage capacitor is charged or not, but cannot adjust the charging speed of the energy storage capacitor.

[0020] 2. During the RLC oscillation phase, the decay rate and oscillation frequency are not adjustable if the load is fixed and the load is completely dependent on the load characteristics.

[0021] 3. In terms of energy compensation, a direct linear power supply scheme was used. Although it has higher accuracy, the linear power supply output has a certain energy storage capacitor. Due to capacity limitations, these capacitors cannot meet the compensation requirements at higher power levels.

[0022] Furthermore, the second related technology discloses a high-power demagnetizing main power supply system with cyclic pulses, including a transformer, a three-phase rectifier, a battery energy storage unit, a direct current (DC) / DC step-up / step-down converter, and a chopper commutation unit; the third related technology discloses a high-power pulse demagnetizing power supply circuit and system, which includes an energy storage unit, a transformer, an alternating current (AC) / DC converter, a four-quadrant DC / DC converter, and a DC / DC converter; the fourth related technology includes a main power control module, a direct power supply module, a charging / supply module, a DC-DC conversion module, and a capacitor module. The main power control module controls the timing of the direct power supply module, the charging / supply module, and the DC-DC conversion module, so that during the pulse interval, the charging / supply module absorbs energy from the power station and stores it in the supercapacitor; the fifth related technology discloses an energy storage type demagnetizing module, a demagnetizing power supply, and a charging and discharging control method. The demagnetizing module consists of a charging control unit, an energy storage unit, a downstream constant current conversion unit, a current commutation unit, and a monitoring unit. The demagnetizing power supply consists of multiple demagnetizing modules connected in parallel, with multiple energy storage demagnetizing modules sharing a single monitoring unit. The system first charges the energy storage unit to its rated voltage. The monitoring unit then controls the subsequent constant current converter to perform constant current pulse discharge on the load. The current commutation unit controls the forward and reverse current. The control system performs charging control based on the remaining energy in the energy storage unit after the previous pulse discharge and the sum of the energy from subsequent pulses, maintaining appropriate remaining energy and voltage in the energy storage system until all pulse discharges are complete.

[0023] The second to fifth related technologies mentioned above often have the following problems:

[0024] 1. All of them rely on directly utilizing primary energy storage to generate pulse demagnetization energy, without setting up an independent power compensation unit, and the energy storage charging speed is fixed. This makes them unsuitable for scenarios such as "short-time high-frequency demagnetization and single large energy output", and they are prone to problems such as charger energy redundancy or short-time insufficient charging.

[0025] 2. Both lack a tunable resonant parameter adjustment module, making it impossible to actively modulate the oscillation frequency and damping coefficient during demagnetization, and thus difficult to adapt to the demagnetization requirements of different magnetic shielding devices.

[0026] To address the aforementioned problems, various embodiments of this disclosure provide a magnetically shielded demagnetizing wide-range pulse compensation circuit. The circuit includes: a primary energy storage unit, a power compensation unit, and a resonant modulation unit. The output terminal of the primary energy storage unit is connected to the input terminal of the power compensation unit, and the output terminal of the power compensation unit is connected to the input terminal of the resonant modulation unit. The primary energy storage unit includes a first charging element, a first control element, and a first energy storage element. The first charging element supplies power to the first energy storage element, and the first control element adjusts the charging speed of the first energy storage element. The power compensation unit includes a second charging element, a second control element, and a second energy storage element. The second charging element and the primary energy storage unit respectively form two paths for charging the second energy storage element. The second control element controls the switching of the second energy storage element to achieve power compensation of the resonant modulation unit by either the first or second energy storage element. The resonant modulation unit includes a third control element, a resonant adjustment module, and a demagnetizing coil. The third control element cooperates with the resonant adjustment module to adjust the resonant parameters while maintaining the demagnetizing coil under underdamped oscillation. The demagnetizing coil generates a demagnetizing pulse magnetic field.

[0027] 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.

[0028] Please refer to Figure 1 , Figure 1 This is an exemplary schematic diagram of the architecture of a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure. Figure 1 As shown, the magnetic shielding demagnetization wide-range pulse compensation circuit 100 includes: a primary energy storage unit 101, a power compensation unit 102, and a resonant modulation unit 103. The output terminal of the primary energy storage unit 101 is connected to the input terminal of the power compensation unit 102, and the output terminal of the power compensation unit 102 is connected to the input terminal of the resonant modulation unit 103.

[0029] Among them, the primary energy storage unit 101 can refer to a large-capacity energy storage module with adjustable charging speed, which can be used as an energy source to undertake basic energy storage functions.

[0030] The power compensation unit 102 can refer to a dual-path fast charging and discharging energy replenishment module, which can be used as an intermediate compensation part of the circuit to realize dynamic energy replenishment to the downstream resonant modulation unit 103 of the circuit.

[0031] The resonant modulation unit 103 can refer to a pulse generation module with adjustable resonant parameters. It can serve as the core execution part of the circuit, adjusting parameters such as frequency and damping coefficient while maintaining underdamped oscillation, to adapt to the demagnetization requirements of different magnetic shielding devices.

[0032] Here, the primary energy storage unit 101 transmits energy to the power compensation unit 102, giving the power compensation unit 102 sufficient initial energy; then the power compensation unit 102 transmits energy to the resonant modulation unit 103, supporting the resonant modulation unit 103 to perform continuous resonant oscillation and parameter modulation, ensuring the stability and adjustability of the demagnetizing pulse.

[0033] The primary energy storage unit 101 includes a first charging element 1011, a first control element 1012, and a first energy storage element 1013. The first charging element 1011 is used to supply power to the first energy storage element 1013, and the first control element 1012 is used to adjust the charging speed of the first energy storage element 1013.

[0034] In this embodiment, the first charging element 1011 is the core component responsible for energy input in the primary energy storage unit 101. It is used to convert external electrical energy into a form of electrical energy suitable for storage by the first energy storage element 1013, and to provide electrical energy to the first energy storage element 1013 to ensure that the first energy storage element 1013 can be charged stably.

[0035] The first control element 1012 is the core component in the primary energy storage unit 101 responsible for regulating the charging process. It is used to adjust the charging speed of the first energy storage element 1013 to adapt to the energy storage needs in different scenarios.

[0036] The first energy storage element 1013 is the core component responsible for energy storage in the primary energy storage unit 101. It is used to store the electrical energy input by the first charging element 1011 in the form of chemical energy or electric field energy, and release it to the downstream unit when needed to realize the on-demand distribution of energy.

[0037] Furthermore, the output terminal of the first charging element 1011 can be divided into two paths: the first path is directly connected to the input terminal of the first energy storage element 1013, forming a direct charging path; the second path is first connected to the input terminal of the first control element 1012, and then the output terminal of the first control element 1012 is connected to the input terminal of the first energy storage element 1013.

[0038] The power compensation unit 102 includes a second charging element 1021, a second control element 1022, and a second energy storage element 1023. The second charging element 1021 and the primary energy storage unit 101 respectively form two paths for charging the second energy storage element 1023. The second control element 1022 is used to control the switching of the second energy storage element 1023 to achieve power compensation of the resonant modulation unit 103 by the first energy storage element 1013 or the second energy storage element 1023.

[0039] In this embodiment, the second charging element 1021 is the core component in the power compensation unit 102 that provides independent energy input. It can serve as a second source of electrical energy for the second energy storage element 1023, in addition to the primary energy storage unit 101, thereby providing electrical energy to the second energy storage element 1023 and enhancing the flexibility and redundancy of energy replenishment.

[0040] The second control element 1022 is the core component in the power compensation unit 102 responsible for charge and discharge path control and energy switching. It is used to adjust the charging path of the second energy storage element 1023 and control whether the second energy storage element 1023 releases energy to the resonant modulation unit 103.

[0041] The second energy storage element 1023 is the core component in the power compensation unit 102 responsible for temporary energy storage and release. It is used to store compensation energy and can be quickly released to the resonant modulation unit 103.

[0042] Here, the second energy storage element 1023 is specifically used to temporarily store the electrical energy input from the dual paths, and releases the energy through switching control when the resonant modulation unit 103 needs it, so as to realize real-time power supplementation for the underdamped oscillation process and maintain the stability of the oscillation parameters.

[0043] Furthermore, the connection between the second charging element 1021 and the second control element 1022 is as follows: the output terminal of the second charging element 1021 is directly connected to the input terminal of the second energy storage element 1023, forming an independent first charging path, and the second charging element 1021 can directly charge the second energy storage element 1023.

[0044] The primary energy storage unit 101 and the second energy storage element 1023 are connected as follows: the output terminal of the first energy storage element 1013 of the primary energy storage unit 101 is connected to the input terminal of the second control element 1022, and the output terminal of the second control element 1022 is connected to the input terminal of the second energy storage element 1023, forming a second charging path (i.e., the path for the primary energy storage unit to charge the compensation capacitor).

[0045] The connection between the second energy storage element 1023 and the resonant modulation unit 103 is as follows: the output terminal of the second energy storage element 1023 is connected to the input terminal of the second control element 1022, and the output terminal of the second control element 1022 is connected to the input terminal of the resonant modulation unit 103. Through the switching control of the second control element 1022, the discharge compensation of the second energy storage element 1023 to the resonant modulation unit 103 is realized.

[0046] Here, the second control element 1022 can regulate the charging process of the second energy storage element 1023 by controlling the on / off state of the two charging paths; at the same time, the second control element 1022 can control the discharge of the second energy storage element 1023 to the resonant modulation unit 103, realizing flexible power compensation. This dual-path design can ensure that the second energy storage element 1023 can charge and discharge quickly, meeting the dynamic energy requirements of the resonant modulation unit.

[0047] The resonant modulation unit 103 includes a third control element 1031, a resonant adjustment module 1032, and a demagnetizing coil 1033. The third control element 1031 and the resonant adjustment module 1032 cooperate to maintain the demagnetizing coil 1033 under the premise of underdamped oscillation and adjust the resonant parameters. The demagnetizing coil 1033 is used to generate a demagnetizing pulse magnetic field.

[0048] In this embodiment, the third control element 1031 may be the core component in the resonant modulation unit 103 responsible for switching and parameter control of the resonant adjustment module 1032, controlling the resonant adjustment module 1032 to connect or disconnect the circuit and adjust the resonant parameters.

[0049] The resonant adjustment module 1032 can be the core component in the resonant modulation unit 103 responsible for providing adjustable resonant parameters, and can be used to adjust the resonant frequency and damping characteristics of the circuit.

[0050] Here, the resonant frequency can refer to the natural frequency of the periodic changes in current or voltage when the circuit undergoes underdamped oscillation. The damping characteristic can refer to the decay characteristics of the oscillating signal (i.e., current / voltage) in the RLC circuit; in the underdamped state, the oscillation does not disappear immediately, but gradually decays over time (i.e., the amplitude decreases). The damping characteristic is determined by the circuit resistance: the smaller the resistance value, the weaker the damping, and the slower the oscillation decays (i.e., the longer the amplitude is maintained); the larger the resistance value, the stronger the damping, and the faster the oscillation decays (i.e., the shorter the amplitude is maintained).

[0051] Furthermore, the third control element 1031 can adjust the resonant frequency and damping coefficient within a limited range by controlling the number and combination of capacitors and resistors connected in the resonant adjustment module 1032.

[0052] The demagnetizing coil 1033 can be the core execution component in the resonant modulation unit 103 for generating a demagnetizing pulse magnetic field. Specifically, it generates an alternating magnetic field by flowing pulse current to demagnetize the magnetic shielding device.

[0053] Furthermore, the demagnetizing coil 1033 is connected to the external circuit as follows: the input terminal of the demagnetizing coil 1033 is connected to the output terminal of the power compensation unit 102; the output terminal of the demagnetizing coil 1033 is connected to the input terminal of the third control element 1031.

[0054] The connection between the third control element 1031 and the resonance adjustment module 1032 is as follows: the output terminal of the third control element 1031 is connected to the input terminal of the resonance adjustment module 1032, and the output terminal of the resonance adjustment module 1032 is connected to the output terminal of the first energy storage element 1013 in the primary energy storage unit 101.

[0055] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, the primary energy storage unit 101 adjusts the charging speed of the first energy storage element 1013 through the first control element 1012, which can flexibly adapt to different working modes. It can meet the needs of rapid energy replenishment after long-term idleness, and can also cope with short-term repeated use and single large energy output scenarios, thereby improving the energy storage adaptability and energy utilization efficiency of the circuit. The power compensation unit 102 innovatively adopts a dual charging path design. The second charging element 1021 and the primary energy storage unit 101 respectively supply power to the second energy storage element 1023. With the switching control of the second energy storage element 1023 by the second control element 1022, the first energy storage element 1013 and the second energy storage element 1023 can compensate energy to the resonant modulation unit 103 as needed, realizing rapid and stable energy replenishment in high-power scenarios and ensuring the continuous and efficient demagnetization process. Through the coordinated operation of the third control element 1031 and the resonance adjustment module 1032, the resonant modulation unit 103 can adjust the resonance parameters over a wide range while ensuring that the demagnetizing coil 1033 is in an underdamped oscillation state. This allows for flexible adaptation to different demagnetizing requirements and improves the accuracy and applicability of the demagnetizing effect.

[0056] In one possible implementation of the above embodiments, please refer to Figure 2 , Figure 2 This is an exemplary schematic diagram of the specific architecture of the primary energy storage unit 101 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure. Figure 2 As shown, the first charging element 1011 in the primary energy storage unit 101 includes a first charger, the first control element 1012 includes a first switch and a first inductor, and the first energy storage element 1013 includes a supercapacitor matrix.

[0057] The output terminal of the first charger is connected to the input terminal of the first switch and the input terminal of the supercapacitor matrix, respectively. The output terminal of the first switch is connected to the input terminal of the first inductor, and the output terminal of the first inductor is connected to the input terminal of the supercapacitor matrix.

[0058] The first switch works in conjunction with the first inductor to regulate the charging speed of the supercapacitor matrix by controlling the charging voltage of the supercapacitor matrix.

[0059] In this embodiment, the first charging element 1011 is specifically a first charger (abbreviated as UA0). The first charger serves as an external energy input source and is specifically used to convert external electrical energy into DC electrical energy suitable for storage in a supercapacitor matrix, providing initial charging energy for the entire primary energy storage unit 101.

[0060] The first control element 1012 is specifically composed of a first switch (referred to as MA0) and a first inductor (referred to as LA0). MA0 and LA0 are connected in series to form a controllable charging path adjustment component.

[0061] Specifically, the first switch (MA0) can be a high-speed switch to adapt to the dynamic charging needs of the primary energy storage unit 101.

[0062] Specifically, when demagnetization operations involve short-term high-frequency operation or single large-energy output scenarios, the high-speed switch MA0 can work quickly in coordination with the first inductor (LA0) to rapidly increase the charging voltage and speed of the supercapacitor matrix (CA0) through the energy storage and release characteristics of the first inductor (LA0), meeting the large energy demand in a short period of time. In low-power scenarios such as long-term idle, the high-speed switch MA0 can quickly switch to the direct charging path to avoid energy loss and charger power redundancy, thereby flexibly matching the energy supply requirements of different demagnetization operation modes.

[0063] The first energy storage element 1013 is specifically a supercapacitor matrix (CA0 for short), which utilizes the large capacity and rapid charging and discharging characteristics of supercapacitors to achieve efficient storage and release of electrical energy.

[0064] Furthermore, in the primary energy storage unit 101, the output of the first charger (UA0) is divided into a direct charging path and an inductor regulation path, and the two paths are connected in parallel to the supercapacitor matrix (CA0).

[0065] Specifically, the direct charging path connects the output of the first charger (UA0) directly to the input of the supercapacitor matrix (CA0), forming a direct charging circuit without switches and inductors, which is suitable for low-power, slow-speed charging scenarios. The inductor-controlled path connects the output of the first charger (UA0) to the input of the first switch (MA0), the output of the first switch (MA0) is connected in series with the input of the first inductor (LA0), and the output of the first inductor (LA0) is then connected to the input of the supercapacitor matrix (CA0), forming a controlled charging path that is suitable for fast charging scenarios.

[0066] Here, when rapid charging is required (such as short-term high-frequency demagnetization pre-charge or single large energy demand), the first switch (MA0) is closed, connecting the first inductor (LA0) to the charging path. At this time, the first inductor (LA0) utilizes its characteristic of impeding current changes to store magnetic field energy in the early stage of charging. When the current stabilizes, it releases the energy, increasing the charging voltage, thereby accelerating the charging speed of the supercapacitor matrix and shortening the energy storage time.

[0067] When slow charging is required (such as maintaining power during long-term idle periods or avoiding power redundancy of the charger), disconnect the first switch (MA0) and charge only through the direct charging path. At this time, the charging voltage is directly provided by the first charger (UA0), which is slower and can reduce energy loss.

[0068] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, the primary energy storage unit 101 constructs a dual charging path through the first switch (MA0) and the first inductor (LA0): when MA0 is closed, LA0 increases the charging voltage to accelerate the charging of the supercapacitor matrix (CA0), meeting the needs of scenarios such as short-term high frequency and single large energy; when MA0 is open, it only charges slowly through the direct path, adapting to scenarios such as long-term idleness, solving the problem of power redundancy or insufficient charging in short time caused by the fixed charging mode in related technologies. Through the large capacity characteristics of the supercapacitor matrix (CA0), sufficient basic energy can be stored to provide stable support for the downstream power compensation unit 102 and resonant modulation unit 103; at the same time, the fast charging and discharging characteristics of the supercapacitor matrix match the dual-path charging design, ensuring that energy can be released quickly when needed, avoiding energy accumulation or waste, and improving the energy utilization efficiency of the entire circuit. Charging speed regulation is achieved through a simple series combination of a switch and an inductor, eliminating the need for complex converters or control algorithms, thus reducing circuit complexity and cost. At the same time, the switching logic between the two charging paths is clear (depending on the on / off state of the switch), ensuring high control reliability and enabling stable adaptation to the dynamic energy requirements of large magnetic shielding devices during demagnetization.

[0069] In one possible implementation of the above embodiments, please refer to Figure 3 , Figure 3This is an exemplary schematic diagram of the specific architecture of the power compensation unit 102 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure. Figure 3 As shown, the second charging element 1021 in the power compensation unit 102 includes a second charger, the second control element 1022 includes a second switch, a third switch and a second inductor, and the second energy storage element 1023 includes a compensation capacitor.

[0070] The output terminal of the second charger is connected to the input terminal of the compensation capacitor, the output terminal of the supercapacitor matrix is ​​connected to the input terminal of the second switch, the output terminal of the second switch is connected to the input terminal of the second inductor, the output terminal of the second inductor is connected to the input terminal of the compensation capacitor, and the output terminal of the compensation capacitor is connected to the input terminal of the third switch.

[0071] The second switch works in conjunction with the second inductor to control the charging of the compensation capacitor, and the third switch is used to control the discharge of the compensation capacitor to the resonant modulation unit 103 to achieve power compensation.

[0072] In this embodiment, the second charging element 1021, specifically the second charger (hereinafter referred to as UA1), can serve as an independent energy input source, directly providing electrical energy to the compensation capacitor (hereinafter referred to as CA1), and is a supplementary energy path outside the primary energy storage unit 101.

[0073] The second control element 1022 consists of a second switch (hereinafter referred to as MA1), a third switch (hereinafter referred to as MA2) and a second inductor (hereinafter referred to as LA1), wherein the second switch and the second inductor are connected in series to form a charging control branch, and the third switch is used as a discharge control component.

[0074] The second energy storage element 1023, specifically a compensation capacitor (CA1), is used to temporarily store electrical energy from dual-path input and release it quickly when needed to achieve power compensation for the resonant modulation unit 103.

[0075] Specifically, the output of the second charger (UA1) is directly connected to the input of the compensation capacitor (CA1), forming an independent first charging path that can directly charge the compensation capacitor (CA1). The output of the supercapacitor matrix (CA0) of the primary energy storage unit 101 is connected to the input of the second switch (MA1), the output of the second switch (MA1) is connected in series with the input of the second inductor (LA1), and the output of the second inductor (LA1) is connected to the input of the compensation capacitor (CA1), forming a second charging path. The output of the compensation capacitor (CA1) is connected to the input of the third switch (MA2), and the output of the third switch (MA2) is connected to the input of the resonant modulation unit 103, forming a discharge circuit.

[0076] Here, the charging and discharging control mechanism of the power compensation unit 102 specifically includes a charging control mechanism and a discharging control mechanism.

[0077] Specifically, the charging control mechanism involves the second switch (MA1) and the second inductor (LA1) working together to regulate the second charging path. When the second switch (MA1) is closed, the electrical energy of the supercapacitor matrix (CA0) is transferred to the compensation capacitor (CA1) through the second inductor (LA1). The second inductor (LA1) improves the charging efficiency through its energy storage and release characteristics, thus accelerating the charging speed of the compensation capacitor (CA1). The second charger (UA1) can independently charge the compensation capacitor (CA1), forming a dual-source energy supply with the second path to ensure that the compensation capacitor (CA1) can quickly store energy.

[0078] The discharge control mechanism is that the third switch (MA2) controls the compensation capacitor (CA1) to discharge to the resonant modulation unit 103. Specifically: when the resonant modulation unit 103 needs energy compensation, the third switch (MA2) is closed, and the compensation capacitor (CA1) releases the stored electrical energy to replenish the energy loss of the resonant modulation unit 103 during the resonant oscillation process and maintain the stability of the underdamped oscillation; when the third switch (MA2) is opened, the compensation capacitor (CA1) stops discharging to avoid unnecessary energy consumption.

[0079] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, the power compensation unit 102 forms a dual charging path through the second charger (UA1) and the supercapacitor matrix (CA0) of the primary energy storage unit 101 to charge the compensation capacitor (CA1): UA1 is directly charged, and CA0 is charged in series with the second inductor (LA1) via the second switch (MA1); the compensation capacitor (CA1) discharges to the resonant modulation unit 103 under the control of the third switch (MA2) to achieve power compensation. The dual-path charging design, combined with the inductor, significantly improves the charging speed of the compensation capacitor, meeting the rapid energy replenishment requirements in high-frequency demagnetization scenarios and avoiding the impact of energy supply lag on the demagnetization effect. The precise discharge control of the third switch (MA2) can timely replenish the energy loss of the resonant modulation unit 103 in underdamped oscillations, maintain stable oscillation parameters, and solve the problem of uncontrollable oscillation amplitude in traditional circuits. Furthermore, the charging and discharging paths in the power compensation unit 102 are independently controllable, which can flexibly respond to dynamic energy demands and avoid ineffective energy consumption, improving the energy utilization efficiency and operational reliability of the entire demagnetization circuit.

[0080] In one possible implementation of the above embodiments, both the supercapacitor matrix and the compensation capacitor are provided with a preset voltage margin, which is used to meet the energy required for parameter modulation of the resonant adjustment module 1032.

[0081] In this embodiment, the preset voltage margin can refer to the extra capacity reserved in the design of the supercapacitor matrix (CA0) and the compensation capacitor (CA1) that exceeds the voltage required for normal operation.

[0082] Here, when the resonant adjustment module 1032 performs parameter modulation, the preset voltage margin can supplement the energy consumed by the circuit due to parameter changes, ensuring that the system always maintains an underdamped oscillation state and ensuring the effectiveness of the demagnetization parameter modulation.

[0083] The parameter modulation of the resonant adjustment module 1032 changes the energy demand of the circuit: for example, increasing the damping characteristics of the circuit will increase the energy consumption of the circuit. At this time, the extra electrical energy corresponding to the preset voltage margin can be released to compensate for the energy change in the circuit, so as to avoid the oscillation state deviating from underdamping or parameter modulation failure due to insufficient energy.

[0084] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, by releasing the voltage margin, the supercapacitor matrix and compensation capacitor provide sufficient energy redundancy for the parameter modulation of the resonant adjustment module, ensuring flexible adjustment of demagnetization parameters and stable maintenance of underdamped oscillation.

[0085] In one possible implementation of the above embodiments, please refer to Figure 4 , Figure 4 This is an exemplary schematic diagram of another magnetic shielding demagnetization wide-range pulse compensation circuit architecture according to an embodiment of this disclosure, such as... Figure 4 As shown, the resonant modulation unit 103 also includes a coil switching module 1034, which is used to control the demagnetizing coil 1033 to disconnect from the power supply circuit after the demagnetizing process is completed; wherein, the power supply circuit is a power supply circuit including the primary energy storage unit 101 and the power compensation unit 102.

[0086] In this embodiment, the core function of the coil switching module 1034 is to completely disconnect the demagnetizing coil 1033 from the power circuit containing the primary energy storage unit 101 and the power compensation unit 102 by its own switching action (such as switching off) after the demagnetizing process is completed.

[0087] In this context, "switching" can refer to the action of control elements such as switches to connect (connect) or disconnect (cut) a specific module or component in a circuit from the loop.

[0088] Here, the isolation between the demagnetizing coil 1033 and the power supply circuit can prevent residual energy generated by abnormal fluctuations (such as power supply noise, induced voltage, etc.) in the power supply circuit from being conducted to the demagnetizing coil 1033 after demagnetization, thus preventing the demagnetizing coil from having a short-term or cumulative magnetization effect, and thus avoiding affecting the spatial residual magnetism of the magnetic shielding device.

[0089] In addition, the operation of the coil switching module 1034 is time-sequential: the switching is completed before the demagnetization operation begins (connecting the demagnetization coil 1033 to the power circuit), and the state remains unchanged throughout the entire demagnetization process to ensure that the underdamped oscillation and power compensation operation are not disturbed. The disconnection action is performed after the demagnetization is completed to ensure the stability of the demagnetization process and the final effect.

[0090] The magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure achieve reliable isolation between the demagnetizing coil 1033 and the power supply circuit, preventing abnormal fluctuations in the power supply circuit after demagnetization from conducting residual energy to the demagnetizing coil 1033, preventing short-term or cumulative magnetization effects in the demagnetizing coil 1033, and ensuring that the spatial residual magnetism of the magnetic shielding device is not affected. Strict timing control ensures the stability of underdamped oscillations and power compensation operations during demagnetization, avoids interference from switching actions on oscillation parameters and energy compensation, and improves the reliability and final effect of the demagnetization process.

[0091] In one possible implementation of the above embodiments, please refer to Figure 5 , Figure 5 This is an exemplary schematic diagram of the specific architecture of the resonant modulation unit 103 in a magnetically shielded demagnetizing wide-range pulse compensation circuit according to an embodiment of this disclosure. Figure 5 As shown, the coil switching module in the resonant modulation unit 103 includes a fourth switch module (not shown in the figure), the third control element 1031 in the resonant modulation unit 103 includes a fifth switch and a sixth switch, the resonant adjustment module 1032 includes a resonant capacitor array and a damping resistor array, and the demagnetizing coil 1033 includes an inductor coil for generating a demagnetizing magnetic field.

[0092] The output of the third switch is connected to the input of the fourth switch module. The output of the fourth switch module is connected to the input of the inductor coil. The output of the inductor coil is connected to the input of the inherent resistor and the input of the fifth switch. The output of the inherent resistor is connected to the output of the supercapacitor matrix. The output of the fifth switch is connected to the input of the damping resistor array. The output of the damping resistor array is connected to the input of the sixth switch. The output of the sixth switch is connected to the input of the resonant capacitor array. The output of the resonant capacitor array is connected to the output of the supercapacitor matrix.

[0093] The fourth switch module is used to control the on / off isolation of the inductor coil and the power supply circuit. The fifth and sixth switches work together to control the switching of the damping resistor array and the resonant capacitor array, so as to adjust the resonant parameters while maintaining underdamped oscillation.

[0094] In this embodiment, the coil switching module 1034 specifically includes a fourth switch module (hereinafter referred to as MA3), which is the core component controlling the connection and disconnection of the demagnetizing coil 1033 and the power supply circuit. The third control element 1031 consists of a fifth switch (hereinafter referred to as Q1) and a sixth switch (hereinafter referred to as Q2), which coordinately control the switching of components in the resonance adjustment module 1032. The resonance adjustment module 1032 includes a resonant capacitor array (hereinafter referred to as CL1) and a damping resistor array (hereinafter referred to as RL1), which are used to provide adjustable resonance parameters; wherein, the resonance parameters include the resonant frequency and damping characteristics. The demagnetizing coil 1033 is specifically an inductor coil, which generates a demagnetizing magnetic field by flowing pulse current and is the execution component for the demagnetizing operation.

[0095] In addition, the inductor (hereinafter referred to as L1) is connected to the inherent resistor (hereinafter referred to as R1), and the inductor (L1) and the inherent resistor (R1) constitute a magnetic shielding device; the inductor (L1), the inherent resistor (R1), the resonant capacitor array (CL1) and the damping resistor array (RL1) together form the RLC circuit in the resonant modulation unit 103.

[0096] Furthermore, in the resonant modulation unit 103, the output terminal of the third switch (MA2) in the power compensation unit 102 is connected to the input terminal of the fourth switch module (MA3), and the output terminal of the fourth switch module (MA3) is connected to the input terminal of the inductor coil (L1), forming an energy transmission path from the power supply to the demagnetizing coil. The output terminal of the inductor coil (L1) is divided into two branches, one connected to the input terminal of the inherent resistor (R1), and the other connected to the input terminal of the fifth switch (Q1). The output terminal of the inherent resistor (R1) is directly connected to the output terminal of the supercapacitor matrix (CA0) in the primary energy storage unit 101, forming part of the loop.

[0097] The output of the fifth switch (Q1) is connected to the input of the damping resistor array (RL1), the output of the damping resistor array (RL1) is connected to the input of the sixth switch (Q2), the output of the sixth switch (Q2) is connected to the input of the resonant capacitor array (CL1), and the output of the resonant capacitor array (CL1) is connected to the output of the supercapacitor matrix (CA0), forming a resonant branch that includes the damping resistor array (RL1) and the resonant capacitor array (CL1).

[0098] Furthermore, the fifth switch (Q1) and the sixth switch (Q2) are specifically used to control the switching of the damping resistor array (RL1) and the resonant capacitor array (CL1). By selecting different combinations of capacitors and resistors, the resonant frequency and damping characteristics can be adjusted to meet different demagnetization requirements while maintaining the underdamped oscillation of the circuit.

[0099] Here, since the damping resistor array (RL1) causes a change in the overall DC resistance of the circuit, the adjustment of the resonant parameters in the circuit is mainly based on the modulation of the resonant capacitor array (CL1), while also considering the adjustability of the damping resistor array (RL1).

[0100] Furthermore, the values ​​of the damping resistor array (RL1) and the resonant capacitor array (CL1) are not adjusted during circuit operation.

[0101] Through the wide-range pulse compensation circuit and device for magnetic shielding demagnetization in the above embodiments of this disclosure, the fourth switch module (MA3) controls the on / off isolation between the inductor coil (L1) and the power supply circuit, disconnecting the circuit after demagnetization, effectively avoiding the short-term or cumulative magnetization effect of the coil caused by abnormal fluctuations such as power supply noise and induced voltage, preventing the residual magnetism in the space of the magnetic shielding device from being affected, and ensuring the final demagnetization effect. The fifth switch (Q1) and the sixth switch (Q2) work together to switch the damping resistor array (RL1) and the resonant capacitor array (CL1), achieving the adjustment of the resonant frequency and damping characteristics while maintaining underdamped oscillation. The method of using the resonant capacitor array (CL1) as the main modulator and the damping resistor array (RL1) as the auxiliary modulator avoids the excessive influence of the resistor on the DC resistance of the circuit, and provides compensation space for the oscillation deviation caused by construction and manufacturing errors of the array coil of the large magnetic shielding device, realizing intelligent modulation of the demagnetization parameters. The damping resistor array (RL1) and resonant capacitor array (CL1) do not adjust their values ​​during circuit operation, ensuring the stability of underdamped oscillation and avoiding interference from dynamic parameter changes on the demagnetizing pulse magnetic field. At the same time, the voltage margin support of the primary energy storage unit 101 and the power compensation unit 102 further ensures the reliability of resonant modulation.

[0102] In one possible implementation of the above embodiments, please refer to Figure 6 , Figure 6 This is an exemplary schematic diagram of the architecture of another magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of this disclosure, such as... Figure 6 As shown, the circuit also includes a controller 104, which is electrically connected to the primary energy storage unit 101, the power compensation unit 102, and the resonant modulation unit 103, respectively.

[0103] The controller 104 is used to control the fifth and sixth switches to switch the damping resistor array and the resonant capacitor array before the demagnetization operation begins, so as to set the resonant parameters of the RLC circuit and make the RLC circuit meet the underdamped oscillation condition; wherein, the RLC circuit includes an inductor coil, an inherent resistor, a damping resistor array and a resonant capacitor array.

[0104] In this embodiment, before the demagnetization operation is started, the controller 104 sends control commands to the fifth switch (Q1) and the sixth switch (Q2) in the resonant modulation unit 103, and sets the resonant parameters of the RLC circuit by switching the connection of specific components in the damping resistor array (RL1) and the resonant capacitor array (CL1).

[0105] During the setup process, it is necessary to ensure that the RLC circuit meets the underdamped oscillation condition. This is achieved by selecting appropriate capacitance values ​​(resonant capacitor array) and resistance values ​​(damping resistor array) to make the circuit oscillate in an underdamped mode, so that a stable pulse current can be generated during the subsequent demagnetization process.

[0106] In addition, the controller 104 is also used to confirm the set resonance parameters to ensure that the resonance parameters meet the demagnetization requirements.

[0107] The controller 104 is also used to monitor the voltage and current data of the power compensation unit 102 and the resonant modulation unit 103 in real time, so as to grasp the energy change status.

[0108] Meanwhile, the controller 104 controls the charging energy of the supercapacitor matrix (CA0) by adjusting the output of the first charger (UA0) and the coordinated action of the first switch (MA0) and the first inductor (LA0), ensuring sufficient basic energy storage.

[0109] The controller 104, for the power compensation unit 102, adjusts the charging and discharging state of the compensation capacitor (CA1) by controlling the switching of the second switch (MA1) and the third switch (MA2): when the energy of the resonant modulation unit 103 is insufficient, the compensation capacitor (CA1) is controlled to discharge to replenish energy; when the energy of the compensation capacitor (CA1) is low, it is quickly charged through the path of the second charger (UA1) or the primary energy storage unit 101.

[0110] Here, the entire adjustment process is based on the premise of not interfering with the underdamped oscillation steps of the resonant modulation unit 103, ensuring accurate and stable energy replenishment, maintaining stable parameters of the demagnetizing pulse, and guaranteeing the demagnetizing effect.

[0111] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above embodiments of this disclosure, the controller 104 accurately sets the resonance parameters of the RLC circuit and confirms that it meets the underdamped oscillation condition by switching the damping resistor array (RL1) and the resonant capacitor array (CL1) before demagnetization, laying the foundation for the stable generation of demagnetizing pulse current and avoiding poor demagnetization effect due to abnormal initial parameters. By coordinating the charging and discharging and parameter modulation of each unit, the circuit can adapt to different demagnetization scenarios, realize flexible adjustment of demagnetization parameters, and ensure the intelligence and efficiency of demagnetization operation.

[0112] In one possible implementation of the above embodiments, the specific type of switch is not limited to a relay switch. It is understood that... Figures 1-6 The switch diagram shown in any of the diagrams is for illustrative purposes only.

[0113] 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.

[0114] 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 magnetic shield degaussing wide range pulse compensation circuit, characterized by, The circuit comprises: a primary energy storage unit, a power compensation unit, a resonant modulation unit and a controller, an output end of the primary energy storage unit is connected with an input end of the power compensation unit, an output end of the power compensation unit is connected with an input end of the resonant modulation unit, and the controller is electrically connected with the primary energy storage unit, the power compensation unit and the resonant modulation unit respectively; the primary energy storage unit comprises a first charging element, a first control element and a first energy storage element, the first charging element is used for supplying power for the first energy storage element, and the first control element is used for adjusting a charging speed of the first energy storage element; the power compensation unit comprises a second charging element, a second control element and a second energy storage element, the second charging element and the primary energy storage unit respectively constitute two paths for charging the second energy storage element, and the second control element is used for controlling switching of the second energy storage element to realize power compensation of the resonant modulation unit by the first energy storage element or the second energy storage element; the resonant modulation unit comprises a third control element, a resonant adjustment module, a degaussing coil and an inherent resistance, the third control element comprises a fifth switch and a sixth switch, the resonant adjustment module comprises a resonant capacitor array and a damping resistance array, and the degaussing coil is an inductor coil; the third control element and the resonant adjustment module cooperate to adjust resonant parameters under the premise of underdamped oscillation of the degaussing coil; the degaussing coil is used for generating a degaussing pulse magnetic field; and the inductor coil, the inherent resistance, the damping resistance array and the resonant capacitor array constitute an RLC circuit; the controller is used for controlling the fifth switch and the sixth switch to switch the damping resistance array and the resonant capacitor array to set resonant parameters of the RLC circuit and make the RLC circuit satisfy an underdamped oscillation condition before a degaussing operation starts.

2. The circuit of claim 1, wherein, the first charging element in the primary energy storage unit comprises a first charging machine, the first control element comprises a first switch and a first inductor, and the first energy storage element comprises a super capacitor matrix; an output end of the first charging machine is connected with an input end of the first switch and an input end of the super capacitor matrix respectively, an output end of the first switch is connected with an input end of the first inductor, and an output end of the first inductor is connected with an input end of the super capacitor matrix.

3. The circuit of claim 2, wherein, the first switch and the first inductor cooperate to adjust a charging speed of the super capacitor matrix by controlling a charging voltage of the super capacitor matrix.

4. The circuit of claim 2, wherein, the second charging element in the power compensation unit comprises a second charging machine, the second control element comprises a second switch, a third switch and a second inductor, and the second energy storage element comprises a compensation capacitor; an output end of the second charging machine is connected with an input end of the compensation capacitor, an output end of the super capacitor matrix is connected with an input end of the second switch, an output end of the second switch is connected with an input end of the second inductor, an output end of the second inductor is connected with an input end of the compensation capacitor, and an output end of the compensation capacitor is connected with an input end of the third switch. The second switch cooperates with the second inductor to control charging of the compensation capacitor, and the third switch is used to control discharging of the compensation capacitor to the resonant modulation unit to achieve power compensation.

5. The circuit of claim 4, wherein, The super capacitor matrix and the compensation capacitor are provided with a preset voltage margin, and the voltage margin is used to meet the energy required by parameter modulation of the resonant modulation module.

6. The circuit of claim 5, wherein, The resonant modulation unit further comprises a coil switching module, which is used to control disconnection of the demagnetizing coil from the power supply circuit after completion of the demagnetization process; wherein the power supply circuit is a power supply circuit including the primary energy storage unit and the power compensation unit.

7. The circuit of claim 6, wherein, The coil switching module in the resonant modulation unit comprises a fourth switch module; The output end of the third switch is connected with the input end of the fourth switch module, the output end of the fourth switch module is connected with the input end of the inductor coil, the output end of the inductor coil is connected with the input end of the inherent resistance and the input end of the fifth switch respectively, the output end of the inherent resistance is connected with the output end of the super capacitor matrix, the output end of the fifth switch is connected with the input end of the damping resistance array, the output end of the damping resistance array is connected with the input end of the sixth switch, the output end of the sixth switch is connected with the input end of the resonant capacitor array, and the output end of the resonant capacitor array is connected with the output end of the super capacitor matrix. The fourth switch module is used to control on-off isolation of the inductor coil and the power supply circuit.

8. The circuit of claim 1, wherein, The controller is further used to monitor voltage and current data of the power compensation unit and the resonant modulation unit during the demagnetization process, and simultaneously adjust charging energy of the primary energy storage unit and charging and discharging states of the power compensation unit, so as to complete energy supplement without affecting the resonant step.

9. A magnetic shield degaussing wide range pulse compensation device, characterized by, The magnetic shielding demagnetization wide-range pulse compensation device comprises the magnetic shielding demagnetization wide-range pulse compensation circuit according to any one of claims 1 to 8.

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