Magnetic shielding degaussing wide-range pulse compensation circuit and device

Abstract

The invention relates to the technical field of magnetic shielding, and discloses a magnetic shielding degaussing wide-range pulse compensation circuit and device.A primary energy storage unit supplies power to a first energy storage element through a first charging element, and a first control element adjusts the charging speed of the first energy storage element; the power compensation unit charges the second energy storage element through double paths, and the second control element is switched to realize power compensation; the resonance modulation unit is connected with the resonance adjustment module through a third control element, under-damped oscillation of the degaussing coil is maintained, resonance parameters are adjusted, and the degaussing coil generates a degaussing pulse magnetic field. The primary energy storage unit adjusts the charging speed of the first energy storage element through the first control element, different working modes can be flexibly adapted, the requirement for rapid energy supplementation after long-term idling can be met, the scene of short-time repeated use and single-time large energy output can be coped with, and the energy storage adaptability and the energy utilization efficiency of the circuit are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic shielding, in particular to a magnetic shielding demagnetization wide-range pulse compensation circuit and device. BACKGROUND

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

[0003] In the related art, the existing demagnetization circuit often has problems such as unadjustable energy storage charging speed, limited oscillation parameters due to fixed load, insufficient high-power compensation capability, and is difficult to adapt to diversified demagnetization requirements. Therefore, how to realize wide-range parameter adjustment and efficient energy compensation of the demagnetization circuit has become a technical problem to be solved. SUMMARY

[0004] Therefore, the present application provides a magnetic shielding demagnetization wide-range pulse compensation circuit and device to solve the problem of how to realize wide-range parameter adjustment and efficient energy compensation of the demagnetization circuit.

[0005] One aspect of the present disclosure provides a magnetic shielding demagnetization wide-range pulse compensation circuit, the circuit comprising: a primary energy storage unit, a power compensation unit and a resonance modulation unit, the output end of the primary energy storage unit being connected with the input end of the power compensation unit, and the output end of the power compensation unit being connected with the input end of the resonance modulation unit; the primary energy storage unit comprising a first charging element, a first control element and a first energy storage element, the first charging element being used to power the first energy storage element, and the first control element being used to adjust the charging speed of the first energy storage element; the power compensation unit comprising 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 constituting two paths for charging the second energy storage element, and the second control element being used to control the switching of the second energy storage element to realize power compensation of the resonance modulation unit by the first energy storage element or the second energy storage element; the resonance modulation unit comprising a third control element, a resonance adjustment module and a demagnetization coil, the third control element cooperating with the resonance adjustment module to adjust the resonance parameters while maintaining the demagnetization coil in under-damped oscillation; and the demagnetization coil being used to generate a demagnetization pulse magnetic field.

[0006] Another aspect of the present disclosure also provides a magnetic shielding demagnetization wide-range pulse compensation device, which comprises the above-mentioned magnetic shielding demagnetization wide-range pulse compensation circuit.

[0007] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiment of the present 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, can meet the rapid energy compensation demand after long-term idling, can cope with the scene of short-term repeated use and single large energy output, and improves the energy storage adaptability and energy utilization efficiency of the circuit. The power compensation unit innovatively adopts a double-charging path design, the second charging element and the primary energy storage unit supply power to the second energy storage element respectively, and the second control element controls the switching of the second energy storage element, so that the first energy storage element and the second energy storage element can compensate energy for the resonant modulation unit as needed, realizing rapid and stable energy compensation in a high-power scene and ensuring the continuous and efficient performance of the demagnetization process.

[0008] In addition, through the cooperation of the third control element and the resonant adjustment module, the resonant modulation unit can adjust the resonant parameters in a wide range on the basis of ensuring that the demagnetization coil is in an under-damped oscillation state, thereby flexibly adapting to different demagnetization demands and improving the precision and applicability of the demagnetization effect. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present disclosure, the drawings needed in the specific embodiment or related technology description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0010] Figure 1 is an exemplary schematic diagram of the architecture of a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure; Figure 2 is an exemplary schematic diagram of the specific architecture of a primary energy storage unit 101 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure; Figure 3 is an exemplary schematic diagram of the specific architecture of a power compensation unit 102 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure; Figure 4 is an exemplary schematic diagram of the architecture of another magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure; Figure 5 is an exemplary schematic diagram of the specific architecture of a resonant modulation unit 103 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure; Figure 6 is an exemplary schematic diagram of the architecture of yet another magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0011] With the wide application of magnetic shielding technology in the field of precision equipment, the demagnetization circuit as the core component directly affects the stability and reliability of the shielding effect. The application scenarios are expanding and facing more complex working conditions.

[0012] In the first related technology, a compensation type pulse demagnetization circuit and its method are disclosed. The energy storage capacitor in the resistor-inductor-capacitor (RLC) second-order oscillation circuit is used to charge the demagnetization coil in the shielding device first. When the current reaches the saturation region of the shielding material, the energy storage capacitor is cut off, and then the oscillation capacitor is put into the discharge circuit to realize inductive energy storage. The RLC second-order oscillation circuit is adjusted to be in an under-damped state, a pulse current is generated in the demagnetization coil, and the shielding material is repeatedly magnetized by the magnetic field generated by the pulse current to realize demagnetization.

[0013] However, the first related technology has the following problems: 1. The combination of switches and diodes is used in the energy storage capacitor charging stage, which can only control whether the energy storage capacitor is charged or not, but cannot adjust the charging speed of the energy storage capacitor; 2. In the RLC oscillation stage, the attenuation speed and oscillation frequency are not adjustable because it completely depends on the load characteristics, i.e., the load is fixed; 3. In terms of energy compensation, a linear power supply direct power supply scheme is used. Although it has higher precision, there is a certain energy storage capacitor in the output of the linear power supply. Due to the capacity limitation, these capacitors cannot meet the compensation demand under higher power.

[0014] Further, a circulating pulse high-power degaussing main power system is disclosed in the second related technology, which comprises a transformer, a three-phase rectifier, a battery energy storage unit, a direct current (DC) / DC boost-buck converter and a chopping commutation unit. A high-power pulse degaussing power circuit and system are disclosed in the third related technology, which comprises 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 comprises a main control module, a direct supply module, a charging supply module, a direct-direct conversion module and a capacitor module. The main control module controls the input timing of the direct supply module, the charging supply module and the direct-direct conversion module, so that the charging supply module absorbs energy from the power station and stores it in the super capacitor during the pulse interval. The fifth related technology discloses an energy storage type degaussing module, a degaussing power supply and a charging and discharging control method. The degaussing module is composed of a charging control unit, an energy storage unit, a post-stage constant current conversion unit, a current commutation unit and a monitoring unit. The degaussing power supply is composed of a plurality of degaussing modules in parallel, and the plurality of energy storage type degaussing modules share one monitoring unit. The system first charges the energy storage unit to the rated voltage, and the monitoring unit controls the post-stage constant current conversion unit to perform constant current pulse discharge on the load. The current commutation unit controls the positive and negative directions of the current. The control system controls the charging according to the residual energy in the energy storage unit after the last pulse discharge and the total energy of the subsequent pulses, maintains the appropriate residual energy and voltage in the energy storage system, and completes all pulse discharges.

[0015] The above-mentioned second to fifth related technologies often have the following problems: 1. All rely on directly using the primary energy storage energy to generate pulse degaussing energy, without setting an independent power compensation unit, and the energy storage charging speed is fixed. This leads to the inability to adapt to "short-time high-frequency degaussing, single large energy output" and other scenes, and the problem of energy redundancy or short-time charging shortage of the charging machine.

[0016] 2. All lack adjustable resonance parameter adjustment modules, and cannot actively modulate the oscillation frequency and damping coefficient of degaussing, making it difficult to adapt to the degaussing needs of different magnetic shielding devices.

[0017] To solve the above problems, a magnetic shielding demagnetization wide-range pulse compensation circuit is provided in various embodiments of the present disclosure. The circuit comprises a primary energy storage unit, a power compensation unit and a resonance modulation unit. The output end of the primary energy storage unit is connected with the input end of the power compensation unit, and the output end of the power compensation unit is connected with the input end of the resonance modulation unit. 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 to power the first energy storage element, and the first control element is used to adjust the 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. The second control element is used to control the switching of the second energy storage element to realize power compensation of the resonance modulation unit by the first energy storage element or the second energy storage element. The resonance modulation unit comprises a third control element, a resonance adjustment module and a demagnetization coil. The third control element cooperates with the resonance adjustment module to adjust the resonance parameters under the premise of under-damped oscillation. The demagnetization coil is used to generate a demagnetization pulse magnetic field.

[0018] To make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0019] Please refer to Figure 1 , Figure 1 is an exemplary schematic diagram of the architecture of a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure. As shown in Figure 1 , the magnetic shielding demagnetization wide-range pulse compensation circuit 100 comprises a primary energy storage unit 101, a power compensation unit 102 and a resonance modulation unit 103. The output end of the primary energy storage unit 101 is connected with the input end of the power compensation unit 102, and the output end of the power compensation unit 102 is connected with the input end of the resonance modulation unit 103.

[0020] The primary energy storage unit 101 can be a large-capacity energy storage module with adjustable charging speed, which can be used as an energy source to undertake basic energy storage functions.

[0021] The power compensation unit 102 can be a double-path fast charge-discharge energy supplement module, which can be used as an intermediate compensation part of the circuit to realize dynamic energy supply to the resonance modulation unit 103 downstream of the circuit.

[0022] The resonance modulation unit 103 can be a pulse generation module that can adjust resonance parameters, can be the core execution part of the circuit, and can adjust parameters such as frequency and damping coefficient while maintaining under-damped oscillation to adapt to the demagnetization needs of different magnetic shielding devices.

[0023] Here, the primary energy storage unit 101 transmits energy to the power compensation unit 102, so that the power compensation unit 102 has sufficient initial energy; then the power compensation unit 102 transmits energy to the resonance modulation unit 103 to support the resonance modulation unit 103 to continue the resonance oscillation and parameter modulation, and ensure the stability and adjustability of the demagnetization pulse.

[0024] 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 power 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.

[0025] In this embodiment, the first charging element 1011 is the core component of the primary energy storage unit 101 responsible for energy input, which is used to convert external electrical energy into a form suitable for storage by the first energy storage element 1013, to provide electrical energy to the first energy storage element 1013, and to ensure that the first energy storage element 1013 can be charged stably.

[0026] The first control element 1012 is the core component of the primary energy storage unit 101 responsible for charging process regulation, which is used to adjust the charging speed of the first energy storage element 1013 to adapt to the energy storage needs in different scenarios.

[0027] The first energy storage element 1013 is the core component of the primary energy storage unit 101 responsible for energy storage, which 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 to release it to the downstream unit when needed, to realize on-demand energy distribution.

[0028] Further, the output of the first charging element 1011 can be divided into two paths: the first path is directly connected to the input of the first energy storage element 1013, forming a direct charging path; the second path is first connected to the input of the first control element 1012, and then connected to the input of the first energy storage element 1013 through the output of the first control element 1012.

[0029] The power compensation unit 102 comprises 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 constitute 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, so as to realize the power compensation of the first energy storage element 1013 or the second energy storage element 1023 to the resonant modulation unit 103.

[0030] In the embodiment, the second charging element 1021 is a core component of the power compensation unit 102 for providing independent energy input. The second charging element 1021 can be used as a second energy source of the second energy storage element 1023 in addition to the primary energy storage unit 101, so as to provide electric energy for the second energy storage element 1023, thereby enhancing the flexibility and redundancy of energy compensation.

[0031] The second control element 1022 is a core component of the power compensation unit 102 for controlling the charging and discharging paths and the energy switching. The second control element 1022 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.

[0032] The second energy storage element 1023 is a core component of the power compensation unit 102 for temporarily storing and releasing energy. The second energy storage element 1023 is used to store compensation energy and can quickly release energy to the resonant modulation unit 103.

[0033] Here, the second energy storage element 1023 is specifically used to temporarily store the electric energy input by the double paths, and release energy through switching control when the resonant modulation unit 103 needs energy, so as to realize the real-time power compensation for the under-damped oscillation process and maintain the stability of the oscillation parameters.

[0034] Further, the second charging element 1021 and the second control element 1022 are connected in the following manner: the output end of the second charging element 1021 is directly connected to the input end of the second energy storage element 1023, thereby forming an independent first charging path. The second charging element 1021 can directly charge the second energy storage element 1023.

[0035] The primary energy storage unit 101 and the second energy storage element 1023 are connected in the following manner: the output end of the first energy storage element 1013 of the primary energy storage unit 101 is connected to the input end of the second control element 1022, and the output end of the second control element 1022 is connected to the input end of the second energy storage element 1023, thereby forming a second charging path (i.e., a path for charging the compensation capacitor by the primary energy storage unit).

[0036] The connection mode of the second energy storage element 1023 and the resonant modulation unit 103 is that the output end of the second energy storage element 1023 is connected to the input end of the second control element 1022, the output end of the second control element 1022 is connected to the input end of the resonant modulation unit 103, and the discharge compensation of the second energy storage element 1023 to the resonant modulation unit 103 is realized through the switching control of the second control element 1022.

[0037] Here, the second control element 1022 can adjust the charging process of the second energy storage element 1023 by controlling the on-off 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 double-path design can ensure that the second energy storage element 1023 can be quickly charged and discharged, meeting the dynamic energy demand of the resonant modulation unit.

[0038] The resonant modulation unit 103 includes a third control element 1031, a resonant adjustment module 1032 and a degaussing coil 1033. The third control element 1031 cooperates with the resonant adjustment module 1032 to maintain the resonant parameter adjustment of the degaussing coil 1033 under the premise of under-damped oscillation; the degaussing coil 1033 is used to generate a degaussing pulse magnetic field.

[0039] In this embodiment, the third control element 1031 can be a core component in the resonant modulation unit 103 responsible for the switching and parameter control of the resonant adjustment module 1032, controlling the resonant adjustment module 1032 to access or disconnect the loop and adjusting the resonant parameters.

[0040] The resonant adjustment module 1032 can be a core component in the resonant modulation unit 103 responsible for providing adjustable resonant parameters, which can be used to adjust the resonant frequency and damping characteristics of the loop.

[0041] Here, the resonant frequency can refer to the inherent frequency of the periodic change of current or voltage when the loop is under-damped oscillation. The damping characteristic can refer to the decay characteristic of the oscillation signal (i.e. current / voltage) in the RLC loop; in the under-damped state, the oscillation does not immediately disappear, but gradually decays (i.e. amplitude decreases) over time; the damping characteristic is determined by the resistance value of the loop: the smaller the resistance value, the weaker the damping, the slower the oscillation decay (i.e. the amplitude is maintained for a longer time); the larger the resistance value, the stronger the damping, the faster the oscillation decay (i.e. the amplitude is maintained for a shorter time).

[0042] Further, the third control element 1031 can realize the adjustment of the resonant frequency within a limited range and the adjustment of the damping coefficient within a limited range by controlling the number of access and combination of capacitors and resistors in the resonant adjustment module 1032.

[0043] The demagnetization coil 1033 can be a core execution component in the resonance modulation unit 103 for generating a demagnetization pulse magnetic field, specifically by generating an alternating magnetic field through the flow of pulse current to achieve demagnetization of the magnetic shielding device.

[0044] Further, the connection mode of the demagnetization coil 1033 and the external circuit is that the input end of the demagnetization coil 1033 is connected to the output end of the power compensation unit 102, and the output end of the demagnetization coil 1033 is connected to the input end of the third control element 1031.

[0045] The connection mode of the third control element 1031 and the resonance adjustment module 1032 is that the output end of the third control element 1031 is connected to the input end of the resonance adjustment module 1032, and the output end of the resonance adjustment module 1032 is connected to the output end of the first energy storage element 1013 in the primary energy storage unit 101.

[0046] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present 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, not only meeting the fast energy compensation demand after long-term idling, but also coping 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 double-charging path design, the second charging element 1021 and the primary energy storage unit 101 supply power to the second energy storage element 1023 respectively, and the switching control of the second energy storage element 1023 by the second control element 1022 enables the first energy storage element 1013 and the second energy storage element 1023 to compensate energy for the resonance modulation unit 103 as needed, thereby realizing fast and stable energy compensation in a high-power scenario and ensuring the continuous and efficient performance of the demagnetization process. Through the cooperative matching of the third control element 1031 and the resonance adjustment module 1032, the resonance modulation unit 103 can adjust the resonance parameters in a wide range on the basis of ensuring that the demagnetization coil 1033 is in an under-damped oscillation state, thereby flexibly adapting to different demagnetization demands and improving the precision and applicability of the demagnetization effect.

[0047] In one possible implementation manner of the above-mentioned embodiments, please refer to Figure 2 , Figure 2 is an exemplary schematic diagram of a specific architecture of the primary energy storage unit 101 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure. As Figure 2 shown, the first charging element 1011 in the primary energy storage unit 101 includes a first charging machine, the first control element 1012 includes a first switch and a first inductor, and the first energy storage element 1013 includes a super capacitor matrix. The output end of the first charging machine is connected with the input end of the first switch and the input end of the super capacitor matrix respectively, the output end of the first switch is connected with the input end of the first inductor, and the output end of the first inductor is connected with the input end of the super capacitor matrix. The first switch cooperates with the first inductor to adjust the charging speed of the super capacitor matrix by controlling the charging voltage of the super capacitor matrix.

[0048] In the embodiment, the first charging element 1011 is specifically a first charging machine (referred to as UA0 for short), which is an external energy input source and is specifically used to convert external electric energy into direct current electric energy suitable for storage of the super capacitor matrix, thereby providing initial charging energy for the entire primary energy storage unit 101.

[0049] The first control element 1012 is specifically composed of a first switch (referred to as MA0 for short) and a first inductor (referred to as LA0 for short), and the MA0 and the LA0 are connected in series to form a controllable charging path adjusting component.

[0050] The first switch (MA0) can be a high-speed switch to adapt to the dynamic charging requirements of the primary energy storage unit 101.

[0051] Specifically, when the demagnetization operation exists in a short-time high-frequency operation or a single large energy output scene, the high-speed switch MA0 can quickly cooperate with the first inductor (LA0) to rapidly increase the charging voltage and speed of the super capacitor matrix (CA0) through the energy storage-energy release characteristics of the first inductor (LA0), thereby meeting the large energy requirement in a short time; and in a long-term idle or low-power scene, the high-speed switch MA0 can be quickly switched to a direct charging path to avoid energy loss and charging machine power redundancy, thereby flexibly matching the energy supply requirements of different demagnetization operation modes.

[0052] The first energy storage element 1013 is specifically a super capacitor matrix (referred to as CA0 for short), which uses the large capacity and fast charging and discharging characteristics of the super capacitor to realize efficient storage and release of electric energy.

[0053] Further, in the primary energy storage unit 101, the output end of the first charging machine (UA0) is divided into a direct charging path and an inductor adjusting path, and the two paths are connected in parallel to the super capacitor matrix (CA0).

[0054] Specifically, the direct charging path is that the output end of the first charger (UA0) is directly connected to the input end of the super capacitor matrix (CA0), forming a direct charging loop without passing through a switch and an inductor, which can be applied to a low-power and slow-speed charging scene; the inductor adjustment path is that the output end of the first charger (UA0) is first connected to the input end of the first switch (MA0), the output end of the first switch (MA0) is connected in series with the input end of the first inductor (LA0), and the output end of the first inductor (LA0) is connected to the input end of the super capacitor matrix (CA0), forming an adjustment charging path controlled by a switch and an inductor, which can be applied to a fast charging scene.

[0055] Here, when fast charging is needed (such as pre-energy compensation before short-time high-frequency demagnetization or single large energy demand), the first switch (MA0) is closed, so that the first inductor (LA0) is connected to the charging path. At this time, the first inductor (LA0) stores magnetic field energy at the initial stage of charging by using the characteristic of hindering current change, and releases energy when the current tends to be stable, thereby increasing the charging voltage and accelerating the charging speed of the super capacitor matrix, and shortening the energy storage time.

[0056] When slow charging is needed (such as maintaining the power when long-term idle or avoiding power redundancy of the charger), the first switch (MA0) is disconnected, and charging is only performed through the direct charging path. At this time, the charging voltage is directly provided by the first charger (UA0), the speed is slower, and energy loss can be reduced.

[0057] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present disclosure, the primary energy storage unit 101 constructs a double 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 super capacitor matrix (CA0), meeting the needs of short-time high-frequency, single large energy and other scenes; when MA0 is disconnected, only slow charging through the direct path is performed, which is suitable for long-term idle and other scenes, solving the problem of power redundancy or insufficient short-time charging caused by fixed charging mode in the related art. Through the large-capacity characteristic of the super capacitor matrix (CA0), sufficient basic energy can be stored to provide stable support for the downstream power compensation unit 102 and the resonant modulation unit 103; at the same time, the fast charging and discharging characteristics of the super capacitor matrix are matched with the double-path charging design, ensuring that energy can be quickly released when needed, avoiding energy accumulation or waste, and improving the energy utilization efficiency of the entire circuit. Only the simple series combination of a switch and an inductor is used to realize charging speed adjustment, without the need for complex converters or control algorithms, thereby reducing the complexity and cost of the circuit; at the same time, the switching logic of the two charging paths is clear (dependent on the on-off of the switch), and the control reliability is high, which can stably adapt to the dynamic energy demand of the large-scale magnetic shielding device during demagnetization.

[0058] In one possible implementation of the above-mentioned embodiments, please refer to Figure 3 , Figure 3is an exemplary schematic diagram of a specific architecture of a power compensation unit 102 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure. As shown in Figure 3 The second charging element 1021 in the power compensation unit 102 includes a second charging machine, 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. The output end of the second charging machine is connected to the input end of the compensation capacitor, the output end of the super capacitor matrix is connected to the input end of the second switch, the output end of the second switch is connected to the input end of the second inductor, the output end of the second inductor is connected to the input end of the compensation capacitor, and the output end of the compensation capacitor is connected to the input end of the third switch. The second switch and the second inductor cooperate to control the charging of the compensation capacitor, and the third switch is used to control the discharge of the compensation capacitor to the resonance modulation unit 103 to achieve power compensation.

[0059] In this embodiment, the second charging element 1021, specifically the second charging machine (hereinafter referred to as UA1), can be used as an independent energy input source to directly provide electrical energy for the compensation capacitor (hereinafter referred to as CA1), which is a supplemental energy path in addition to the primary energy storage unit 101.

[0060] The second control element 1022 is composed 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.

[0061] The second energy storage element 1023, specifically the compensation capacitor (CA1), is used to temporarily store the electrical energy input by the double-path, and quickly release it when needed to achieve power compensation for the resonance modulation unit 103.

[0062] Specifically, the output end of the second charging machine (UA1) is directly connected to the input end of the compensation capacitor (CA1) to form an independent first charging path, which can directly charge the compensation capacitor (CA1). The output end of the super capacitor matrix (CA0) of the primary energy storage unit 101 is connected to the input end of the second switch (MA1), the output end of the second switch (MA1) is connected in series with the input end of the second inductor (LA1), the output end of the second inductor (LA1) is connected to the input end of the compensation capacitor (CA1), forming a second charging path. The output end of the compensation capacitor (CA1) is connected to the input end of the third switch (MA2), and the output end of the third switch (MA2) is connected to the input end of the resonance modulation unit 103, forming a discharge circuit.

[0063] Here, the charging and discharging control mechanism of the power compensation unit 102 specifically includes a charging control mechanism and a discharging control mechanism.

[0064] Specifically, the charging control mechanism controls the second switch (MA1) and the second inductor (LA1) to regulate the second charging path. When the second switch (MA1) is closed, the electrical energy of the super capacitor matrix (CA0) is transmitted to the compensation capacitor (CA1) through the second inductor (LA1), and the second inductor (LA1) improves the charging efficiency through the energy storage and release characteristics, and accelerates the charging speed of the compensation capacitor (CA1). The second charging machine (UA1) can independently charge the compensation capacitor (CA1), and forms a double-source compensation with the second path, to ensure that the compensation capacitor (CA1) can be quickly charged.

[0065] The discharge control mechanism controls the third switch (MA2) to discharge the compensation capacitor (CA1) to the resonant modulation unit 103. When the resonant modulation unit 103 needs energy compensation, the third switch (MA2) is closed, the compensation capacitor (CA1) releases the stored electrical energy, supplements the energy loss of the resonant modulation unit 103 in the resonant oscillation process, and maintains the stability of the under-damped oscillation. When the third switch (MA2) is opened, the compensation capacitor (CA1) stops discharging to avoid unnecessary energy consumption.

[0066] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present disclosure, the power compensation unit 102 forms a double charging path through the second charging machine (UA1) and the super capacitor matrix (CA0) of the primary energy storage unit 101 to charge the compensation capacitor (CA1): UA1 directly charges, and CA0 charges in series through the second switch (MA1) and the second inductor (LA1); the compensation capacitor (CA1) discharges to the resonant modulation unit 103 through the third switch (MA2) to realize power compensation. Among them, the double-path charging design combines the inductor to significantly improve the charging speed of the compensation capacitor, meet the fast energy compensation demand in the high-frequency demagnetization scene, and avoid the energy supply lag affecting the demagnetization effect. The precise discharge control of the third switch (MA2) can supplement the energy loss of the resonant modulation unit 103 in the under-damped oscillation in time, maintain the stability of the oscillation parameters, and solve the problem that the oscillation amplitude is uncontrollable in the traditional circuit. In addition, the charging and discharging path in the power compensation unit 102 is independently controllable, which can flexibly respond to dynamic energy demand and avoid invalid energy consumption, thereby improving the energy utilization efficiency and working reliability of the entire demagnetization circuit.

[0067] In one possible implementation of the above-mentioned embodiments, a preset voltage margin is arranged in the super capacitor matrix and the compensation capacitor, and the voltage margin is used to meet the energy required for parameter modulation of the resonant modulation module 1032.

[0068] In the present embodiment, the preset voltage margin can refer to the additional capacity of the super capacitor matrix (CA0) and the compensation capacitor (CA1) reserved beyond the required voltage in normal operation when designed.

[0069] Here, when the resonance adjustment module 1032 performs parameter modulation, the preset voltage margin can supplement the additional energy consumed by the parameter change of the loop, ensure that the system always maintains an under-damped oscillation state, and ensure the effectiveness of the demagnetization parameter modulation.

[0070] Among them, the parameter modulation of the resonance adjustment module 1032 changes the energy demand of the loop: for example, increasing the damping characteristics of the loop will increase the energy consumption of the loop. At this time, the additional energy corresponding to the release of the preset voltage margin can make up for the energy change in the loop, avoid the oscillation state deviating from under-damping or parameter modulation failure due to insufficient energy.

[0071] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present disclosure, the release of the above-mentioned voltage margin provides sufficient energy redundancy for the parameter modulation of the resonance adjustment module by the super capacitor matrix and the compensation capacitor, ensuring the flexible adjustment of the demagnetization parameters and the stable maintenance of the under-damped oscillation.

[0072] In one possible implementation manner of the above-mentioned embodiments, please refer to Figure 4 , Figure 4 is another example of the architecture of the magnetic shielding demagnetization wide-range pulse compensation circuit of the embodiments of the present disclosure, as shown in Figure 4 The resonance modulation unit 103 further includes a coil switching module 1034, which is used to control the demagnetization coil 1033 to be disconnected from the power supply loop after the end of the demagnetization process; wherein the power supply loop is a power supply loop including the primary energy storage unit 101 and the power compensation unit 102.

[0073] In this embodiment, the core function of the coil switching module 1034 is to completely disconnect the demagnetization coil 1033 from the power supply loop including the primary energy storage unit 101 and the power compensation unit 102 through its own switching action (such as switch disconnection) after the end of the demagnetization process.

[0074] Among them, switching can refer to the action of a control element such as a switch to realize the connection (switching) or disconnection (cutting) of a specific module or element in the circuit and the loop.

[0075] Here, the isolation of the demagnetization coil 1033 and the power supply loop can avoid the residual energy generated by abnormal fluctuations (such as power supply noise, induced voltage, etc.) of the power supply loop being conducted to the demagnetization coil 1033 after the end of demagnetization, prevent the demagnetization coil from appearing short-time or cumulative magnetizing effect, and further avoid affecting the spatial residual magnetism of the magnetic shielding device.

[0076] In addition, the operation of the coil switching module 1034 has a timing sequence: the switching (connecting the demagnetization coil 1033 to the power supply circuit) is completed before the start of the demagnetization operation, and the state is kept unchanged during the entire demagnetization process to ensure that the under-damped oscillation and power compensation operation are not disturbed, and the disconnection operation is performed after the demagnetization is completed, thereby ensuring the stability and final effect of the demagnetization process.

[0077] The magnetic shielding demagnetization wide-range pulse compensation circuit and device according to the above-mentioned embodiments of the present disclosure can realize reliable isolation of the demagnetization coil 1033 and the power supply circuit, avoid the conduction of residual energy from abnormal fluctuations of the power supply circuit to the demagnetization coil 1033 after the demagnetization is completed, prevent the demagnetization coil 1033 from having a short-time or cumulative magnetization effect, and ensure that the space residual magnetism of the magnetic shielding device is not affected. Through strict timing control (ensuring the stability of the under-damped oscillation and power compensation operation during demagnetization, avoiding the disturbance of the switching operation to the oscillation parameters and energy compensation, and improving the reliability and final effect of the demagnetization process).

[0078] In one possible implementation of the above-mentioned embodiments, please refer to Figure 5 , Figure 5 is an exemplary schematic diagram of a specific architecture of a resonance modulation unit 103 in a magnetic shielding demagnetization wide-range pulse compensation circuit according to an embodiment of the present disclosure. As shown in Figure 5 , the coil switching module in the resonance modulation unit 103 includes a fourth switch module (not shown in the figure), the third control element 1031 in the resonance modulation unit 103 includes a fifth switch and a sixth switch, the resonance adjustment module 1032 includes a resonance capacitor array and a damping resistor array, and the demagnetization coil 1033 includes an inductor coil for generating a demagnetization magnetic field; 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 respectively connected with the input end of the inherent resistance and the input end of the fifth switch, 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 resistor array, the output end of the damping resistor 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 resonance capacitor array, and the output end of the resonance capacitor array is connected with the output end of the super capacitor matrix; The fourth switch module is used for controlling the on-off isolation of the inductor coil and the power supply circuit, and the fifth switch and the sixth switch are used for controlling the switching of the damping resistor array and the resonance capacitor array to adjust the resonance parameters while maintaining the under-damped oscillation.

[0079] In the embodiment, the coil switching module 1034, specifically including a fourth switch module (hereinafter referred to as MA3), is a core component for controlling the on-off of the degaussing coil 1033 and the power supply loop. The third control element 1031, composed of a fifth switch (hereinafter referred to as Q1) and a sixth switch (hereinafter referred to as Q2), cooperatively controls the switching of elements in the resonance adjustment module 1032. The resonance adjustment module 1032, including a resonance capacitor array (hereinafter referred to as CL1) and a damping resistor array (hereinafter referred to as RL1), is used to provide adjustable resonance parameters; wherein the resonance parameters include resonance frequency and damping characteristics. The degaussing coil 1033, specifically an inductor coil, generates a degaussing magnetic field by flowing through a pulse current, and is the execution component of the degaussing operation.

[0080] In addition, the inductor coil (hereinafter referred to as L1) is connected with the inherent resistance (hereinafter referred to as R1), and the inductor coil (L1) and the inherent resistance (R1) constitute a magnetic shielding device; the inductor coil (L1), the inherent resistance (R1), the resonance capacitor array (CL1) and the damping resistor array (RL1) together form an RLC loop in the resonance modulation unit 103.

[0081] Further, in the resonance modulation unit 103, the output end of the third switch (MA2) in the power compensation unit 102 is connected to the input end of the fourth switch module (MA3), the output end of the fourth switch module (MA3) is connected to the input end of the inductor coil (L1), forming the energy transmission path of the power supply to the degaussing coil; the output end of the inductor coil (L1) is divided into two branches, one connected to the input end of the inherent resistance (R1), and the other connected to the input end of the fifth switch (Q1). The output end of the inherent resistance (R1) is directly connected to the output end of the super capacitor matrix (CA0) in the primary energy storage unit 101, constituting part of the loop.

[0082] The output end of the fifth switch (Q1) is connected to the input end of the damping resistor array (RL1), the output end of the damping resistor array (RL1) is connected to the input end of the sixth switch (Q2), the output end of the sixth switch (Q2) is connected to the input end of the resonance capacitor array (CL1), and the output end of the resonance capacitor array (CL1) is connected to the output end of the super capacitor matrix (CA0), forming a resonance branch containing the damping resistor array (RL1) and the resonance capacitor array (CL1).

[0083] Further, the fifth switch (Q1) and the sixth switch (Q2) are specifically used to cooperatively control the switching of the damping resistor array (RL1) and the resonance capacitor array (CL1), by selecting different combinations of capacitors and resistors, the resonance frequency and the damping characteristics are adjusted under the premise of maintaining the under-damped oscillation of the loop, to adapt to different degaussing requirements.

[0084] Here, since the damping resistor array (RL1) causes the overall DC resistance of the loop to change, the adjustment of the resonance parameters in the circuit is mainly modulated by the resonance capacitor array (CL1), while considering the adjustability of the damping resistor array (RL1).

[0085] In addition, the damping resistor array (RL1) and the resonance capacitor array (CL1) do not adjust the values in the circuit process.

[0086] The magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present disclosure, the fourth switch module (MA3) is isolated by controlling the on-off of the inductor coil (L1) and the power supply loop, and the loop is disconnected after demagnetization is completed, effectively avoiding the short-term or cumulative magnetizing effect of the coil caused by abnormal fluctuations such as power supply noise and induced voltage, preventing the space residual magnetism of the magnetic shielding device from being affected, and ensuring the final demagnetization effect. The fifth switch (Q1) and the sixth switch (Q2) cooperate to switch the damping resistor array (RL1) and the resonance capacitor array (CL1), and realize the adjustment of the resonance frequency and the damping characteristic under the premise of maintaining under-damped oscillation. Among them, the main modulation is the resonance capacitor array (CL1), and the damping resistor array (RL1) is adjusted in an auxiliary manner, which not only avoids the excessive influence of resistance on the DC resistance of the loop, but also provides a compensation space for the oscillation deviation of the array coil of the large magnetic shielding device caused by construction and manufacturing errors, realizes the intelligent modulation of the demagnetization parameters. The damping resistor array (RL1) and the resonance capacitor array (CL1) do not adjust the values in the circuit process, which ensures the stability of the under-damped oscillation, avoids the interference of the dynamic change of the parameters on the demagnetization pulse magnetic field, and further guarantees the reliability of the resonance modulation in cooperation with the voltage margin support of the primary energy storage unit 101 and the power compensation unit 102.

[0087] In one possible implementation of the above-mentioned embodiments, please refer to Figure 6 , Figure 6 is another example of the architecture of the magnetic shielding demagnetization wide-range pulse compensation circuit of the embodiments of the present disclosure, as shown in Figure 6 , the circuit further includes a controller 104, which is electrically connected with the primary energy storage unit 101, the power compensation unit 102, and the resonance modulation unit 103, respectively. The controller 104 is configured to control the fifth switch and the sixth switch to switch the damping resistor array and the resonance capacitor array before the demagnetization operation starts, so as to set the resonance parameters of the RLC loop, so that the RLC loop meets the under-damped oscillation condition; wherein the RLC loop includes an inductor coil, an inherent resistor, a damping resistor array, and a resonance capacitor array.

[0088] In the embodiment, the controller 104 sends control instructions to the fifth switch (Q1) and the sixth switch (Q2) in the resonance modulation unit 103 before the demagnetization operation is started, and sets the resonance parameters of the RLC circuit by switching the access of the damping resistor array (RL1) and specific elements in the resonance capacitor array (CL1).

[0089] In the setting process, it is necessary to ensure that the RLC circuit meets the under-damped oscillation condition, that is, by selecting appropriate capacitor values (resonance capacitor array) and resistance values (damping resistor array), the oscillation state of the circuit is in the under-damped mode, so that a stable pulse current is generated in the subsequent demagnetization process.

[0090] In addition, the controller 104 is also used to confirm the resonance parameters after setting to ensure that the resonance parameters meet the demagnetization requirements.

[0091] The controller 104 is also used to monitor the voltage and current data of the power compensation unit 102 and the resonance modulation unit 103 in real time to master the energy change state.

[0092] At the same time, the controller 104 controls the charging energy of the super capacitor 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), and ensures that the basic energy storage is sufficient.

[0093] The controller 104 controls the charging and discharging state of the compensation capacitor (CA1) by controlling the switching of the second switch (MA1) and the third switch (MA2) for the power compensation unit 102: when the energy of the resonance modulation unit 103 is insufficient, the compensation capacitor (CA1) is controlled to discharge to supplement the energy; when the energy of the compensation capacitor (CA1) is low, the compensation capacitor (CA1) is quickly charged through the path of the second charger (UA1) or the primary energy storage unit 101.

[0094] Here, the entire adjustment process is based on the premise of not interfering with the under-damped oscillation step of the resonance modulation unit 103, ensuring that the energy supplement is accurate and stable, maintaining the parameter stability of the demagnetization pulse, and ensuring the demagnetization effect.

[0095] Through the magnetic shielding demagnetization wide-range pulse compensation circuit and device of the above-mentioned embodiments of the present disclosure, the controller 104 accurately sets the resonance parameters of the RLC circuit and confirms that it meets the under-damped oscillation condition by switching the damping resistor array (RL1) and the resonance capacitor array (CL1) before demagnetization, laying a foundation for stable generation of demagnetization pulse current and avoiding poor demagnetization effect due to abnormal initial parameters. By cooperatively controlling 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 the demagnetization operation.

[0096] In one possible implementation of the above-mentioned embodiment, the specific type of the above-mentioned switch is not limited to a relay switch. It can be understood that, Figures 1-6 The switch pattern shown in the figure of any one of the above-mentioned embodiments is only described by way of example.

[0097] The embodiment of the present application also provides a magnetic shielding degaussing wide-range pulse compensation device. The magnetic shielding degaussing wide-range pulse compensation circuit of the above-mentioned embodiment of the present application can be applied to the magnetic shielding degaussing wide-range pulse compensation device as a hardware unit in the magnetic shielding degaussing wide-range pulse compensation device.

[0098] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A wide-range pulse compensation circuit for magnetic shielding and demagnetization, characterized in that, 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 is used to supply power to the first energy storage element, and the first control element is used to adjust 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 is used to control the switching of the second energy storage element to achieve power compensation of the resonant modulation unit by the first energy storage element or the 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 works in conjunction with the resonant adjustment module to maintain the demagnetizing coil under underdamped oscillations while adjusting the resonant parameters. The demagnetizing coil is used to generate a demagnetizing pulse magnetic field.

2. The circuit according to claim 1, characterized in that, The first charging element in the primary energy storage unit includes a first charger, the first control element includes a first switch and a first inductor, and the first energy storage element includes a supercapacitor matrix. 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.

3. The circuit according to claim 2, characterized in that, The first switch, in conjunction with the first inductor, is used to adjust the charging speed of the supercapacitor matrix by controlling the charging voltage of the supercapacitor matrix.

4. The circuit according to claim 2, characterized in that, The second charging element in the power compensation unit includes a second charger, the second control element includes a second switch, a third switch and a second inductor, and the second energy storage element includes a compensation capacitor. 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. The second switch works in conjunction with the second inductor to control the charging of the compensation capacitor, and the third switch controls the compensation capacitor to discharge to the resonant modulation unit to achieve power compensation.

5. The circuit according to claim 4, characterized in that, 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.

6. The circuit according to claim 5, characterized in that, The resonant modulation unit also includes a coil switching module, which is used to control the demagnetizing coil to disconnect from the power supply circuit after the demagnetizing process is completed; wherein, the power supply circuit is a power supply circuit including a primary energy storage unit and a power compensation unit.

7. The circuit according to claim 6, characterized in that, The coil switching module in the resonant modulation unit includes a fourth switch module, the third control element in the resonant modulation unit includes a fifth switch and a sixth switch, the resonant adjustment module includes a resonant capacitor array and a damping resistor array, and the demagnetizing coil includes an inductor coil for generating a demagnetizing magnetic field. The output terminal of the third switch is connected to the input terminal of the fourth switch module. The output terminal of the fourth switch module is connected to the input terminal of the inductor coil. The output terminal of the inductor coil is connected to the input terminal of the inherent resistor and the input terminal of the fifth switch. The output terminal of the inherent resistor is connected to the output terminal of the supercapacitor matrix. The output terminal of the fifth switch is connected to the input terminal of the damping resistor array. The output terminal of the damping resistor array is connected to the input terminal of the sixth switch. The output terminal of the sixth switch is connected to the input terminal of the resonant capacitor array. The output terminal of the resonant capacitor array is connected to the output terminal of the supercapacitor matrix. The fourth switch module is used to control the on / off isolation of the inductor coil and the power supply circuit. The fifth switch works in conjunction with the sixth switch 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.

8. The circuit according to any one of claims 1-7, characterized in that, The circuit also includes a controller, which is electrically connected to the primary energy storage unit, the power compensation unit, and the resonant modulation unit, respectively. The controller 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.

9. The circuit according to claim 8, characterized in that, The controller is also used to monitor the voltage and current data of the power compensation unit and the resonant modulation unit during the demagnetization operation, and to adjust the charging energy of the primary energy storage unit and the charging and discharging state of the power compensation unit, so as to complete the energy replenishment without affecting the resonance step.

10. A wide-range pulse compensation device for magnetic shielding and demagnetization, characterized in that, The magnetic shielding demagnetization wide-range pulse compensation device includes the magnetic shielding demagnetization wide-range pulse compensation circuit as described in any one of claims 1-9.

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