A demagnetizing power supply control method, apparatus, electronic device, and readable storage medium

Abstract

This disclosure relates to the field of magnetic shielding technology, and proposes a demagnetizing power supply control method, device, electronic device, and readable storage medium. The method includes: synchronizing a first power supply module and a second power supply module using a reference signal source; monitoring a first output signal of the first power supply module and a second output signal of the second power supply module using a feedback acquisition module; synchronizing the first and second power supply modules in phase based on the first and second output signals using a phase calibration module; and controlling the first and second power supply modules using a centralized controller to collaboratively provide a target power signal matching the power output task, the target power signal being used to demagnetize the target magnetic shielding device. The technical solutions provided by one or more embodiments of this disclosure can achieve precise collaborative operation of the two power supply systems, effectively meeting the high power and high precision requirements of the demagnetizing power supply.

Description

Technical Field

[0001] This disclosure relates to the field of magnetic shielding technology, specifically to a demagnetizing power supply control method, device, electronic equipment, and readable storage medium. Background Technology

[0002] Magnetic shielding devices are facilities used to reduce interference from external magnetic fields on internal equipment or to prevent leakage of internal magnetic fields. Common magnetic shielding devices include large-volume magnetic shielding rooms and magnetic shielding chambers. During use, the shielding layer material of a magnetic shielding device may become magnetized due to prolonged exposure to a magnetic field environment. Therefore, the shielding layer material of large magnetic shielding devices generally needs to be demagnetized to achieve optimal performance.

[0003] Currently, alternating current attenuation demagnetization is a commonly used method. By applying an alternating current with gradually decreasing energy to the shielding material, the magnetization of the shielding material can be effectively reduced, allowing the shielding material to regain its shielding performance. In this process, the current change can be further divided into a high-power saturation stage, a rapid demagnetization stage, and a fine demagnetization stage.

[0004] Compared to the other two stages, which last for hundreds or thousands of cycles, the high-power saturation stage requires enormous power but typically lasts only a few cycles, and this process does not demand excessively high precision and stability from the power supply. In contrast, the fine demagnetization stage requires lower power but demands extremely high stability and parameter accuracy. When a circuit system simultaneously requires both high power and high precision, the difficulty of power supply development and manufacturing costs increase exponentially. Summary of the Invention

[0005] In view of this, one or more embodiments of the present disclosure provide a demagnetizing power supply control method, device, electronic device and readable storage medium, which can realize the precise coordinated operation of two power supply systems and effectively meet the high power and high precision requirements of the demagnetizing power supply.

[0006] In a first aspect, this disclosure provides a demagnetizing power supply control method, which includes: using a reference signal source to clock-synchronize a first power supply module and a second power supply module, wherein the output power range of the first power supply module is higher than that of the second power supply module, and the output waveform quality and output power accuracy of the second power supply module are higher than those of the first power supply module; using a feedback acquisition module to monitor a first output signal of the first power supply module and a second output signal of the second power supply module; using a phase calibration module to perform phase synchronization of the first power supply module and the second power supply module based on the first output signal and the second output signal; and using a centralized controller to respond to the acquired power output task, control the first power supply module and the second power supply module to collaboratively provide a target power signal matching the power output task, wherein the target power signal is used to demagnetize the target magnetic shielding device.

[0007] The technical solution provided in this embodiment allows the first power supply module to have a high output power range but relatively low precision requirements, thus effectively meeting the demagnetizing power supply needs during the high-power saturation stage. The second power supply module can have high output waveform quality and output power accuracy requirements but relatively low output power requirements, thus effectively meeting the demagnetizing power supply needs during the fine demagnetizing stage. With the coordinated use of the reference signal source, feedback acquisition module, phase calibration module, and centralized controller, the precise collaborative operation of the two power supply modules is effectively achieved, not only meeting the high power and high precision requirements of the demagnetizing power supply but also greatly reducing the difficulty of power supply development and manufacturing costs.

[0008] In one alternative implementation, when the target power signal is applied to the target magnetic shielding device, a noise reduction and DC blocking module can be used to reduce the power supply noise floor of the target power signal and isolate the DC bias of the target power signal.

[0009] The noise reduction and DC blocking module effectively reduces noise components in the target power signal, resulting in purer demagnetizing energy. During the fine demagnetization stage, it can act more precisely on the material to be demagnetized, avoiding incomplete demagnetization caused by noise interference, thereby improving the uniformity and thoroughness of the overall demagnetization effect. The module can also isolate the DC bias of the target power signal, ensuring that the demagnetizing energy acts on the material according to the expected current pattern, allowing the magnetic domains of the material to flip and recombine in the correct direction, achieving a better demagnetization effect.

[0010] In one optional implementation, clock synchronization of the first power module and the second power module is performed using a reference signal source, including: generating a clock reference signal using the reference signal source; sending the clock reference signal to a first power controller of the first power module so that the first power module generates a first output signal according to the clock frequency of the clock reference signal; and sending the clock reference signal to a second power controller of the second power module so that the second power module generates a second output signal according to the clock frequency of the clock reference signal.

[0011] Using the clock reference signal generated by the reference signal source as a common reference standard, the output signals of the first power supply module and the second power supply module can indirectly achieve clock synchronization. Based on clock synchronization, the output signals of the two modules can further achieve phase synchronization and power synchronization.

[0012] In one optional implementation, a phase calibration module is used to synchronize the first power module and the second power module based on a first output signal and a second output signal. This includes: using the phase calibration module to determine a first voltage phase based on the first output signal; using the phase calibration module to determine a second voltage phase based on the second output signal; calculating a target phase difference based on the first voltage phase and the second voltage phase; and adjusting at least one of the first power module and the second power module based on the target phase difference so that the output voltage phases of the first power module and the second power module are synchronized.

[0013] Based on the first and second output signals, the signal phase states of the two power modules can be determined in real time. This closed-loop phase recognition and control scheme ensures the phase consistency of the output signals of the two power modules.

[0014] In one optional implementation, a centralized controller is used to respond to an acquired power output task and control a first power module and a second power module to collaboratively provide a target power signal that matches the power output task. This includes: using the centralized controller to acquire the power output task; using the centralized controller to determine a switching period and a desired power signal within the switching period based on the power output task; and using the centralized controller to control the first power module and the second power module to collaboratively provide a target power signal that matches the desired power signal within the switching period.

[0015] By controlling the switching process of the two power modules within a single switching period, the smoothness and stability of the switching process are ensured. In this way, the target power signal can both meet the demagnetization requirements of the desired power signal and ensure the stability of the energy waveform.

[0016] In one optional implementation, controlling a first power module and a second power module to collaboratively provide a target power signal matching a desired power signal includes: calculating a first target power of the first power module and a second target power of the second power module based on the desired power signal; controlling the first power module and the second power module to collaboratively provide the target power signal based on the first target power and the second target power; determining a first feedback power of the first power module based on a first output signal; determining a second feedback power of the second power module based on a second output signal; and optimizing the first target power and the second target power based on the first feedback power and the second feedback power.

[0017] During the switching period, the output power of the high-power first power module is gradually reduced while the output power of the high-precision second power module is gradually increased until the high-power power supply is completely disconnected. The entire switching process is smooth and stable. By utilizing the first and second feedback power, closed-loop control of the two power modules can be achieved, enabling consistent management of power, energy, and noise parameters for both modules.

[0018] In one alternative implementation, a centralized controller can be used to start the second power module before the switching period; the centralized controller can also be used to control the second power module after the switching period, combining the residual energy of the first power module to output signals.

[0019] If the second power module has not yet started, preheating it increases power control efficiency. When the second power module supplies power independently, the residual energy from the first power module is taken into account, ensuring the stability of the energy waveform and avoiding waveform interference from residual energy.

[0020] Secondly, this disclosure provides a demagnetizing power supply control device, which includes a reference signal source module, a feedback acquisition module, a phase calibration module, and a centralized controller module. The reference signal source module is used to synchronize the clock of a first power supply module and a second power supply module. The output power range of the first power supply module is higher than that of the second power supply module, and the output waveform quality and output power accuracy of the second power supply module are higher than those of the first power supply module. The feedback acquisition module is used to monitor the first output signal of the first power supply module and the second output signal of the second power supply module. The phase calibration module is used to synchronize the phase of the first power supply module and the second power supply module based on the first and second output signals. The centralized controller module is used to respond to the acquired power output task, control the first and second power supply modules, and collaboratively provide a target power signal matching the power output task. The target power signal is used to demagnetize the target magnetic shielding device.

[0021] Thirdly, this disclosure provides an electronic device, which includes a memory and a processor. The memory is used to store a computer program, and when the computer program is executed by the processor, it implements the above-described demagnetizing power control method.

[0022] Fourthly, this disclosure provides a computer-readable storage medium for storing a computer program that, when executed by a processor, implements the above-described demagnetizing power supply control method.

[0023] This disclosure provides a technical solution using one or more embodiments, employing a reference signal source to calibrate the output energy of two power supply modules, ensuring clock synchronization of the entire power system by following the excitation signal from the reference signal source. On one hand, the first power supply module can be a high-output-power-range module with relatively low precision requirements, thus effectively meeting the demagnetizing power requirements of the high-power saturation stage. On the other hand, the second power supply module can be a module with high output waveform quality and output power accuracy requirements, but relatively low output power requirements, thus effectively meeting the demagnetizing power requirements of the fine demagnetizing stage. The use of the feedback acquisition module and the phase calibration module completes both the current closed loop and the phase closed loop of the two power supply modules. The centralized controller can accurately calculate the output tasks that each of the two power supply modules needs to undertake based on the power output task, coordinating the two power supply modules to provide the target power signal.

[0024] The technical solutions provided by one or more embodiments of this disclosure effectively meet the high power and high precision requirements of the demagnetizing power supply, solve the problem of significant differences in power requirements at different stages of the demagnetizing process, reduce the cost of the demagnetizing power supply, and ensure the demagnetizing effect. Attached Figure Description

[0025] The features and advantages of the embodiments of this disclosure will be more clearly understood by referring to the accompanying drawings, which are illustrative and should not be construed as limiting the present disclosure in any way. In the drawings:

[0026] Figure 1 A schematic diagram of the stages of the AC attenuation demagnetization method in related technologies is shown;

[0027] Figure 2 A flowchart illustrating a demagnetizing power supply control method in one embodiment of this disclosure is shown;

[0028] Figure 3 A schematic diagram illustrating an application scenario of the demagnetizing power supply control method according to one embodiment of this disclosure is shown.

[0029] Figure 4 A schematic diagram of the functional modules of a demagnetizing power supply control device in one embodiment of this disclosure is shown;

[0030] Figure 5 A schematic diagram of the structure of an electronic device according to one embodiment of the present disclosure is shown. Detailed Implementation

[0031] 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 a part of the embodiments of this disclosure, and not all of them. 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.

[0032] In related technologies, the shielding layer of large magnetically shielded spaces requires demagnetization to achieve optimal performance. A commonly used demagnetization method is AC attenuation demagnetization. Please refer to [link to relevant documentation]. Figure 1 This method, based on the characteristics of current changes, can be mainly divided into a high-power saturation stage, a rapid demagnetization stage, and a fine demagnetization stage. Compared to the other two stages, which last for hundreds or thousands of cycles, the high-power saturation stage requires enormous power but lasts only a few cycles, and this stage does not require the power supply to have excessively high precision and stability. In the fine demagnetization stage, the power supply requires only a few hundred watts, but it demands extremely high stability and parameter accuracy, even reaching tens of milliamps. When a circuit system simultaneously meets the power requirements of nearly a hundred kilowatts and the accuracy requirements of tens of milliamps, the difficulty of power supply development and manufacturing costs increase exponentially.

[0033] In view of this, the demagnetizing power supply control method provided in one embodiment of the present disclosure can realize the coordinated operation of two power supply systems, which not only effectively meets the high power and high precision requirements of the demagnetizing power supply, but also reduces the cost of the demagnetizing power supply.

[0034] Please see Figure 2 The demagnetizing power supply control method provided in one embodiment of this disclosure may include the following steps.

[0035] S1: Using a reference signal source, the first power module and the second power module are clock synchronized. The output power range of the first power module is higher than that of the second power module, and the output waveform quality and output power accuracy of the second power module are higher than those of the first power module.

[0036] In this embodiment, a stable reference signal source (e.g., a crystal oscillator) is used to calibrate the output energy of the two power modules, ensuring that the entire power system can be synchronized with the excitation signal of the reference signal source. Based on clock synchronization, the output signals of the two power modules can be further synchronized in phase and in power.

[0037] In this embodiment, the first power supply module can be a power supply module with a high output power range but relatively low precision requirements, thereby well meeting the demagnetizing power supply requirements during the high-power saturation stage. Typically, the first power supply module can also be used during the rapid demagnetizing stage.

[0038] In this embodiment, the second power supply module can be a power supply module with high requirements for output waveform quality and output power accuracy, but relatively low requirements for output power, thereby well meeting the demagnetizing power supply needs of the fine demagnetization stage. For example, the second power supply module may be equipped with a better filtering circuit, which can more effectively reduce harmonics and noise, thereby improving the output waveform quality; or it may have a more accurate voltage and current feedback controller to ensure higher accuracy of the output power supply.

[0039] In this embodiment, the first power module is a high-power power module, and the second power module is a high-precision power module. The first or second power module may include a bridge arm architecture (e.g., half-bridge, full-bridge, three-phase bridge, etc.) unit composed of several switching devices (e.g., MOSFETs, IGBTs). The first or second power module may also include a constant current forming unit composed of inductors and capacitors. The bridge arm architecture unit converts direct current to alternating current by controlling the switching on and off of the switching devices. The constant current forming unit provides an approximately constant current to the load (e.g., the target magnetic shielding device) by designing the resonant impedance of the inductor-capacitor network (LC network).

[0040] It should be noted that the primary purpose of the first power module is to generate high-power energy output, while the second power module needs to have a superior output waveform and higher control precision, even capable of controlling mA-level currents. Therefore, even if the bridge arm architecture units of the first and second power modules are the same (e.g., a bipolar full-bridge circuit), their component parameters differ significantly. For example, the first power module has lower requirements for the modulation frequency and switching noise of its switching devices, while the second power module uses switching devices with high modulation frequency and low switching noise designs.

[0041] In a practical application example, the switching devices of the first power module have a rated voltage of 1200V and a rated current of 600A. The switching devices of the second power module have a rated voltage of 70V and a rated current of 10A. The rated voltage or rated current of the two typically differs by more than ten times.

[0042] In some embodiments, clock synchronization of the first power module and the second power module is performed using a reference signal source, including: generating a clock reference signal using the reference signal source; sending the clock reference signal to a first power controller of the first power module so that the first power module generates a first output signal according to the clock frequency of the clock reference signal; and sending the clock reference signal to a second power controller of the second power module so that the second power module generates a second output signal according to the clock frequency of the clock reference signal.

[0043] Specifically, the target power signal used for demagnetization may be in the form of a sine wave signal, a pulse signal, etc. Therefore, the output signals of the first and second power modules can be generated according to a certain clock signal. If the clocks of the two power modules are not synchronized, the waveforms they generate will have a time deviation.

[0044] Using the clock reference signal generated by the reference signal source as a common reference standard, the output signals of the first power supply module and the second power supply module can indirectly achieve clock synchronization. Based on clock synchronization, the output signals of the two modules can further achieve phase synchronization and power synchronization.

[0045] S2: Using the feedback acquisition module, monitor the first output signal of the first power supply module and the second output signal of the second power supply module.

[0046] In this embodiment, the feedback acquisition module can monitor the output signals of the first power module and the second power module in real time, such as acquiring current and voltage information. Using the first and second output signals, closed-loop feedback control can be performed on the first and second power modules, ensuring that their output phase and output power achieve the ideal effect during the demagnetization process.

[0047] S3: Using the phase calibration module, the first power supply module and the second power supply module are phase synchronized according to the first output signal and the second output signal.

[0048] In this embodiment, the use of the phase calibration module achieves phase closed-loop control of the two power supply modules, facilitating the combined or switched use of their output signals. For example, assuming that both power supply modules output sinusoidal alternating current, phase synchronization means ensuring that their waveforms reach peaks and troughs at the same time.

[0049] In some embodiments, a phase calibration module is used to synchronize the first power module and the second power module based on a first output signal and a second output signal. This includes: using the phase calibration module to determine a first voltage phase based on the first output signal; using the phase calibration module to determine a second voltage phase based on the second output signal; determining a phase adjustment command based on a target phase difference between the first voltage phase and the second voltage phase; and adjusting at least one of the first power module and the second power module based on the target phase difference so that the output voltage phases of the first power module and the second power module are synchronized.

[0050] Specifically, based on the first and second output signals, the signal phase states of the two power modules can be determined in real time. This closed-loop phase recognition and control scheme ensures the phase consistency of the output signals of the two power modules.

[0051] Based on the monitored phase difference, a control algorithm is used to adjust the output signals of one or both power modules. If the phase of the first output signal is ahead, its phase can be appropriately delayed; if the phase of the second output signal is lagging, its phase can be appropriately advanced, until the two phases are synchronized.

[0052] After initial phase adjustment, continuous monitoring of the target phase difference between the two output signals can handle various dynamic changes in practical applications, such as load fluctuations or drift in internal parameters of the power modules. This ensures that the output signals of the two power modules always maintain precise phase synchronization.

[0053] S4: Using a centralized controller, responding to the acquired power output task, the controller controls the first power module and the second power module to collaboratively provide a target power signal that matches the power output task. The target power signal is used to demagnetize the target magnetic shielding device.

[0054] In this embodiment, the centralized controller can accurately calculate the output tasks that each of the two power modules needs to undertake based on the power output task, and coordinate the two power modules to provide the target power signal.

[0055] In some implementations, a centralized controller is used to respond to an acquired power output task and control a first power module and a second power module to collaboratively provide a target power signal that matches the power output task. This includes: using the centralized controller to acquire the power output task; using the centralized controller to determine a switching period and a desired power signal within the switching period based on the power output task; and using the centralized controller to control the first power module and the second power module to collaboratively provide a target power signal that matches the desired power signal within the switching period.

[0056] Specifically, during the high-power saturation and rapid demagnetization phases, the first power module primarily provides the target power signal to the target magnetic shielding device. At this time, the second power module may not output a signal, or may only provide supplementary signals to increase the power limit of the first power module. During the fine demagnetization phase, the second power module primarily provides the target power signal to the target magnetic shielding device, forming a more precise and stable demagnetizing power supply. At this time, the first power module may no longer output a signal.

[0057] When switching from a high-power power supply to a high-precision power supply, an instantaneous switching scheme can easily cause phase instability in the target power signal, affecting its demagnetization effect. More importantly, instantaneous switching schemes typically result in drastic fluctuations in output power before and after the switching point, violating the stability requirements of the target power signal.

[0058] Therefore, by controlling the switching process of the two power modules within a single switching period, the smoothness and stability of the switching process are ensured. In this way, the target power signal can both meet the demagnetization requirements of the desired power signal and ensure the stability of the energy waveform.

[0059] In a practical application example, if the current power demand of the power output task decreases to a preset ratio of the maximum power demand (e.g., 5%), the switching period can be initiated. That is, for a complete demagnetizing task, if the power output task indicates that the entire power system currently needs to provide only a small portion of the peak demagnetizing energy, a switching process can be executed to gradually transition to power supply only by the second power module, thereby enabling more precise management of the remaining demagnetizing energy.

[0060] In some implementations, controlling a first power module and a second power module to collaboratively provide a target power signal that matches a desired power signal includes: calculating a first target power of the first power module and a second target power of the second power module based on the desired power signal; controlling the first power module and the second power module to collaboratively provide the target power signal based on the first target power and the second target power; determining a first feedback power of the first power module based on a first output signal; determining a second feedback power of the second power module based on a second output signal; and optimizing the first target power and the second target power based on the first feedback power and the second feedback power.

[0061] Specifically, during the switching period, the output power of the high-power first power module is gradually reduced while the output power of the high-precision second power module is gradually increased. The combined output of the two power modules demagnetizes the target magnetic shielding device. The first power module can supplement the output of the first target power by subtracting the gradually increasing second target power of the second power module according to the gradually decaying desired power signal, until the high-power power supply is completely disconnected. The entire switching process is smooth and stable.

[0062] Based on the first and second output signals, the first feedback power and the second feedback power can be determined respectively. Using the first and second feedback power, closed-loop power control can be performed on the two power modules, achieving consistent management of power, energy, and noise parameters for both modules.

[0063] In some implementations, a centralized controller can be used to start the second power module before the switching period; the centralized controller can also be used to control the second power module after the switching period, combining the residual energy of the first power module to output signals.

[0064] Specifically, if the second power module has not yet started (e.g., during the high-power saturation stage and rapid demagnetization stage, when the second power module is not outputting a signal), it can be preheated to increase power control efficiency. When the second power module supplies power independently, the residual energy of the first power module is taken into account, which ensures the stability of the energy waveform and avoids waveform interference from residual energy.

[0065] In some implementations, when the target power signal is applied to the target magnetic shielding device, a noise reduction and DC blocking module can be used to reduce the power supply noise floor of the target power signal and isolate the DC bias of the target power signal.

[0066] Specifically, the noise reduction and DC blocking module can effectively reduce the noise component in the target power signal, making the demagnetizing energy purer. During the fine demagnetization stage, it can act more precisely on the material to be demagnetized, avoiding incomplete local demagnetization caused by noise interference, thereby improving the uniformity and thoroughness of the overall demagnetization effect. The noise reduction and DC blocking module can also isolate the DC bias of the target power signal, ensuring that the demagnetizing energy acts on the material to be demagnetized according to the expected current pattern, allowing the magnetic domains of the material to flip and recombine in the correct direction, achieving a better demagnetization effect.

[0067] Please see Figure 3 The present disclosure provides a demagnetizing power supply control method according to one embodiment, which can be applied in scenarios such as... Figure 3 As shown.

[0068] In this embodiment, the execution body (i.e., power management device) of the demagnetizing power supply control method may include a high-power power supply module (equivalent to the first power supply module mentioned above), a high-precision power supply module (equivalent to the second power supply module mentioned above), a noise reduction and DC blocking module, a reference signal source, a power and phase acquisition and calibration module (equivalent to the combination of the feedback acquisition module and the phase calibration module mentioned above), and a centralized controller.

[0069] In this embodiment, the high-power power module is primarily a bipolar full-bridge circuit structure, comprising a first bridge arm unit consisting of MA1~MA4, and a constant current forming unit consisting of inductors LA1~LA2 and capacitors. The high-precision power module is also primarily a bipolar full-bridge circuit structure, comprising a second bridge arm unit consisting of MB1~MB4, and a constant current forming unit consisting of inductors LB1~LB2 and capacitors. MA1~MA4 are IGBT or MOSFET modules with high current-carrying capacity and high voltage capability. This full-bridge circuit has low modulation frequency and switching noise requirements, primarily aimed at generating high-power energy output. MB1~MB4 are IGBT or MOSFET modules with low switching noise and high-frequency design, possessing higher operating frequency and control precision, capable of controlling output current in the mA range. The two power modules are cascaded (parallel or series), allowing both power supplies to operate simultaneously to improve the overall power supply capacity, or to achieve high- and low-precision power supply coordination through phased operation. The cascading method can be chosen based on the specific application scenario.

[0070] In a practical application example, the two power modules are connected in series. The advantage of this configuration is that the high-precision power module can operate continuously, not only increasing the power limit of the high-power module but also eliminating the need for preheating. However, this configuration makes overall control more complex and requires special design to prevent interference between the capacitors and other components of the two power modules.

[0071] In a practical application example, two power supply modules are connected in parallel, with their outputs directly connected in parallel. The advantage of this configuration is its simplicity in control. However, this configuration requires both power supply modules to have components with the same voltage rating, which may increase the cost of high-precision power supply modules.

[0072] In this embodiment, the noise reduction and DC isolation module has the ability to reduce noise and isolate DC bias. On the one hand, the noise reduction and DC isolation module receives the target power signal provided by the two power modules in cooperation, and on the other hand, it applies the processed target power signal to the target magnetic shielding device to demagnetize the magnetic shielding layer of the target magnetic shielding device. Figure 3 In the diagram, the target magnetic shielding device can be simplified as a circuit load consisting of a resistor R1 and an inductor L1.

[0073] In this embodiment, unlike typical combined power supplies, the disclosed technical solution specifically adds a reference signal source module, a power and phase acquisition and calibration module, and a centralized controller, enabling step-by-step switching of the high and low power supplies. Particularly during the switching period, the centralized controller, based on the reference signal source and phase acquisition and calibration module, can perform phase calibration and output energy calibration for both high and low power supply modules. Utilizing power closed-loop control and phase closed-loop control structures, precise switching between high and low power supplies on the load can be achieved. Since it is a switching period, for the target magnetic shielding device as the load, there is a time when both power supplies generate signals and jointly provide power.

[0074] Specifically, the operation and clock reference of both the large and small power supply modules are derived from a reference signal source, ensuring clock synchronization of the entire power system. Based on this, by continuously acquiring the output signals of the large and small power supplies, the signal phase state and feedback power state of the modules can be determined. After calculation and control, situations where the output signal phase is consistent or the output signal power is inconsistent can be avoided, ensuring seamless connection between the output signal waveform and the output signal energy.

[0075] In a practical application example, one switching scheme is as follows: First, the high-power power supply module is synchronized with the desired power signal. Then, under the closed-loop control of the power and phase acquisition and calibration module, the power output of the high-power power supply module is reduced while the power output of the high-precision power supply module is increased. During this process, the output energy value of the high-precision power supply module is subtracted according to the predetermined attenuation logic of the desired power signal, and the high-power power supply module compensates for the remaining energy of the desired power signal. When a certain switching moment is reached, the high-power power supply is completely disconnected. The high-precision power supply module modulates its attenuation energy value based on its own energy and the remaining energy of the high-power power supply module, ultimately ensuring that the output energy attenuates according to the predetermined attenuation logic of the desired power signal.

[0076] In this embodiment, a dual closed-loop control method is used to solve the phase and power inconsistencies that occur in power supply switching schemes in related technologies. This allows the two power modules to precisely attenuate according to a preset waveform attenuation path, ensuring the effective demagnetization of the power system. In practical applications, combining methods such as early startup of the smaller power module and residual energy compensation further achieves seamless energy waveform transitions during demagnetization, ultimately reducing power supply costs while achieving a good demagnetization effect.

[0077] In a practical application test, for a 2m-sized magnetic shielding device, demagnetization was performed using only a 5kW 180A high-power power supply. Due to insufficient power supply accuracy during the fine demagnetization stage, the spatial residual magnetism of the magnetic shielding device after demagnetization was 10nT. Referring to one or more embodiments of this disclosure, but removing the reference signal source and phase calibration module, and using only a 5kW 180A high-power power supply and a 50W 20A high-precision power supply for demagnetization, the final spatial residual magnetism of the magnetic shielding device was 20nT. After using the complete technical solution including a reference signal source and phase calibration module provided by one or more embodiments of this disclosure, the spatial residual magnetism of the magnetic shielding device can be as low as 3nT.

[0078] This disclosure provides a technical solution using one or more embodiments, employing a reference signal source to calibrate the output energy of two power supply modules, ensuring clock synchronization of the entire power system by following the excitation signal from the reference signal source. On one hand, the first power supply module can be a high-output-power-range module with relatively low precision requirements, thus effectively meeting the demagnetizing power requirements of the high-power saturation stage. On the other hand, the second power supply module can be a module with high output waveform quality and output power accuracy requirements, but relatively low output power requirements, thus effectively meeting the demagnetizing power requirements of the fine demagnetizing stage. The use of the feedback acquisition module and the phase calibration module completes both the current closed loop and the phase closed loop of the two power supply modules. The centralized controller can accurately calculate the output tasks that each of the two power supply modules needs to undertake based on the power output task, coordinating the two power supply modules to provide the target power signal.

[0079] The technical solutions provided by one or more embodiments of this disclosure effectively meet the high power and high precision requirements of the demagnetizing power supply, solve the problem of significant differences in power requirements at different stages of the demagnetizing process, reduce the cost of the demagnetizing power supply, and ensure the demagnetizing effect.

[0080] Please see Figure 4 This disclosure also provides a demagnetizing power supply control device, which includes a reference signal source module, a feedback acquisition module, a phase calibration module, and a centralized controller;

[0081] The reference signal source module 100 is used to clock synchronize the first power supply module and the second power supply module. The output power range of the first power supply module is higher than that of the second power supply module, and the output waveform quality and output power accuracy of the second power supply module are higher than those of the first power supply module.

[0082] The feedback acquisition module 200 is used to monitor the first output signal of the first power module and the second output signal of the second power module.

[0083] The phase calibration module 300 is used to perform phase synchronization of the first power supply module and the second power supply module according to the first output signal and the second output signal;

[0084] The centralized controller module 400 is used to respond to the acquired power output task, control the first power module and the second power module, and coordinate to provide a target power signal that matches the power output task. The target power signal is used to demagnetize the target magnetic shielding device.

[0085] In one embodiment, the demagnetizing power supply control device further includes a noise reduction and DC isolation module. This module is used to reduce the power supply noise floor of the target power signal and isolate the DC bias of the target power signal.

[0086] In one embodiment, the reference signal source module 100 is specifically configured to: generate a clock reference signal; send the clock reference signal to a first power controller of a first power module, so that the first power module generates a first output signal according to the clock frequency of the clock reference signal; and send the clock reference signal to a second power controller of a second power module, so that the second power module generates a second output signal according to the clock frequency of the clock reference signal.

[0087] In one embodiment, the phase calibration module 300 is specifically configured to: determine a first voltage phase based on a first output signal; determine a second voltage phase based on a second output signal; calculate a target phase difference based on the first voltage phase and the second voltage phase; and adjust at least one of the first power supply module and the second power supply module based on the target phase difference so that the output voltage phases of the first power supply module and the second power supply module are synchronized.

[0088] In one embodiment, the centralized controller module 400 is specifically configured to: acquire a power output task; determine a switching period and a desired power signal within the switching period based on the power output task; and control the first power module and the second power module to collaboratively provide a target power signal that matches the desired power signal within the switching period.

[0089] In one embodiment, controlling a first power module and a second power module to collaboratively provide a target power signal matching a desired power signal includes: calculating a first target power of the first power module and a second target power of the second power module based on the desired power signal; controlling the first power module and the second power module to collaboratively provide the target power signal based on the first target power and the second target power; determining a first feedback power of the first power module based on a first output signal; determining a second feedback power of the second power module based on a second output signal; and optimizing the first target power and the second target power based on the first feedback power and the second feedback power.

[0090] In one embodiment, the centralized controller module 400 is further configured to: start the second power module before the switching period; and control the second power module to output a signal by combining the residual energy of the first power module after the switching period.

[0091] The modules described in the above embodiments can be implemented by computer chips or by products with certain functions. A typical implementation device is a computer. Specifically, the computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0092] For ease of description, the above devices are described in terms of function, divided into various units. Of course, in implementing this application, the functions of each unit can be implemented in one or more software and / or hardware.

[0093] Please see Figure 5 This disclosure also provides an electronic device, which includes a memory and a processor. The memory is used to store a computer program, and when the computer program is executed by the processor, it implements the above-described demagnetizing power control method.

[0094] This disclosure also provides a computer-readable storage medium for storing a computer program that, when executed by a processor, implements the above-described demagnetizing power supply control method.

[0095] The processor can be a central processing unit (CPU). It can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof.

[0096] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor executes various functional applications and data processing by running the non-transitory software programs, instructions, and modules stored in the memory, thereby implementing the methods in the above-described embodiments.

[0097] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the processor, etc. Furthermore, the memory may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include memory remotely located relative to the processor, which can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0098] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0099] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, embodiments of apparatus, devices, and storage media are basically similar to method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0100] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0101] 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 demagnetization power supply control method characterized by comprising: The method comprises: clock synchronization of the first power module and the second power module by using a reference signal source, the output power range of the first power module being higher than that of the second power module, and the output waveform quality and output power accuracy of the second power module being higher than those of the first power module; monitoring of a first output signal of the first power module and a second output signal of the second power module by using a feedback acquisition module; phase synchronization of the first power module and the second power module according to the first output signal and the second output signal by using a phase calibration module; control of the first power module and the second power module by using a centralized controller in response to an acquired power output task, so as to cooperatively provide a target power signal matched with the power output task, the target power signal being used for demagnetization of a target magnetic shielding device.

2. The method of claim 1, wherein, The method further comprises: reduction of power noise of the target power signal and isolation of direct current bias of the target power signal by using a noise reduction and direct current isolation module when the target power signal acts on the target magnetic shielding device.

3. The method according to claim 1 or 2, characterized in that, The clock synchronization of the first power module and the second power module by using the reference signal source comprises: generation of a clock reference signal by using the reference signal source; sending of the clock reference signal to a first power controller of the first power module, so that the first power module generates the first output signal according to a clock frequency of the clock reference signal; sending of the clock reference signal to a second power controller of the second power module, so that the second power module generates the second output signal according to the clock frequency of the clock reference signal.

4. The method of claim 3, wherein, The phase synchronization of the first power module and the second power module according to the first output signal and the second output signal by using the phase calibration module comprises: determination of a first voltage phase by using the phase calibration module according to the first output signal; determination of a second voltage phase by using the phase calibration module according to the second output signal; calculation of a target phase difference based on the first voltage phase and the second voltage phase; adjustment of at least one of the first power module and the second power module based on the target phase difference, so that the output voltage phases of the first power module and the second power module are synchronized.

5. The method of claim 1, wherein, The control of the first power module and the second power module by using the centralized controller in response to the acquired power output task, so as to cooperatively provide the target power signal matched with the power output task, comprises: acquisition of the power output task by using the centralized controller; determination of a switching period and an expected power signal in the switching period according to the power output task by using the centralized controller; control of the first power module and the second power module by using the centralized controller in the switching period, so as to cooperatively provide the target power signal matched with the expected power signal.

6. The method of claim 5, wherein, The control of the first power module and the second power module cooperates to provide the target power signal matched with the expected power signal, comprising: According to the expected power signal, the first target power of the first power module and the second target power of the second power module are calculated; Based on the first target power and the second target power, the first power module and the second power module are controlled to cooperatively provide the target power signal; According to the first output signal, the first feedback power of the first power module is determined; According to the second output signal, the second feedback power of the second power module is determined; Based on the first feedback power and the second feedback power, the first target power and the second target power are optimized.

7. The method of claim 5, wherein, The method further comprises: Using the centralized controller, starting the second power module before the switching period; Using the centralized controller, controlling the second power module to output signals in combination with the residual energy of the first power module after the switching period.

8. A demagnetization power supply control device characterized by comprising: The device comprises a reference signal source module, a feedback acquisition module, a phase calibration module and a centralized controller; wherein, The reference signal source module is used to synchronize the clock of the first power module and the second power module, the output power range of the first power module is higher than that of the second power module, and the output waveform quality and output power accuracy range of the second power module are higher than those of the first power module; The feedback acquisition module is used to monitor the first output signal of the first power module and the second output signal of the second power module; The phase calibration module is used to synchronize the phase of the first power module and the second power module according to the first output signal and the second output signal; The centralized controller module is used to control the first power module and the second power module to cooperatively provide the target power signal matched with the power output task in response to the acquired power output task, and the target power signal is used to demagnetize the target magnetic shielding device.

9. An electronic device, comprising: The electronic device comprises a memory and a processor, the memory is used to store a computer program, and the computer program is executed by the processor to realize the method in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium is used to store a computer program, and the computer program is executed by the processor to realize the method in any one of claims 1 to 7.

Images