A regulating device and power supply system

Abstract

The application provides a regulating device and a power supply system, which are applied to the technical field of power supply ripple suppression and are used for suppressing power supply output ripple and improving power supply output stability. In the regulating device, a voltage input interface and an output interface are arranged on a shielding box, and a regulating circuit is arranged in the shielding box. The regulating circuit is used for regulating the ripple of a voltage signal and / or the stability of the voltage signal. In the regulating circuit, a low-frequency ripple sampling circuit samples the low-frequency ripple of the voltage signal to obtain a first sampling signal, so that a power supply adjusts the low-frequency ripple in response to the first sampling signal. A high-frequency ripple suppression circuit is used for suppressing the high-frequency ripple of the voltage signal. A voltage comparison circuit is used for determining a reference signal of the difference between the voltage signal and a target voltage signal, so that the power supply adjusts the voltage signal in response to the reference signal to make the absolute value of the difference between the voltage signal and the target voltage signal less than a preset threshold value.

Description

Technical Field

[0001] This application relates to the field of power supply ripple suppression technology, and in particular to a regulating device and a power supply system. Background Technology

[0002] With technological advancements, cutting-edge equipment is facing increasingly stringent requirements for power supply ripple and stability. How to conveniently and efficiently suppress power supply ripple output and improve power supply output stability has become an urgent problem to be solved in the field of power supply ripple suppression technology. Utility Model Content

[0003] This application discloses a regulating device and a power supply system for suppressing power output ripple and improving power output stability.

[0004] In a first aspect, this application provides a regulating device, comprising: a voltage input interface, a regulating circuit, an output interface, and a shielding box. The voltage input interface is connected to a power supply to receive a voltage signal output by the power supply. The input terminal of the regulating circuit is connected to the voltage input interface and is used to regulate the ripple of the voltage signal and / or the stability of the voltage signal. The input terminal of the output interface is connected to the output terminal of the regulating circuit, and the output terminal of the output interface is used to connect to a load, and the output interface is used to output the regulated voltage signal. The voltage input interface and the output interface are disposed on the shielding box, and the regulating circuit is disposed inside the shielding box. Specifically, when the regulating circuit is used to regulate the ripple, the regulating voltage... The circuit includes a low-frequency ripple sampling circuit and / or a high-frequency ripple suppression circuit. When the adjustment circuit is used to adjust stability, the adjustment circuit includes a voltage comparison circuit. The low-frequency ripple sampling circuit samples the low-frequency ripple of the voltage signal to obtain a first sampling signal, so that the power supply adjusts the low-frequency ripple in response to the first sampling signal. The high-frequency ripple suppression circuit suppresses the high-frequency ripple of the voltage signal, wherein the frequency of the low-frequency ripple is less than the frequency of the high-frequency ripple. The voltage comparison circuit determines a reference signal representing the difference between the voltage signal and the target voltage signal, so that the power supply adjusts the voltage signal in response to the reference signal such that the absolute value of the difference between the voltage signal and the target voltage signal is less than a preset threshold.

[0005] In this embodiment, the regulating device effectively suppresses ripple in different frequency ranges by setting a low-frequency ripple sampling circuit and a high-frequency ripple suppression circuit. The voltage comparison circuit can provide feedback regulation of the power supply to optimize the stability of the power supply output voltage. By setting a separate regulating device and coupling it between the power supply and the load, this application can improve the efficiency and convenience of power supply ripple regulation. Compared with setting a ripple suppression and stability improvement module inside the power supply, the shielding box can block electromagnetic signals from the external environment, prevent electromagnetic signals from affecting the operation of various circuits in the regulating module, and prevent electromagnetic signals from being superimposed on the voltage signal to be processed, thereby effectively suppressing ripple and improving the stability of the voltage output.

[0006] In one possible implementation, when the adjustment circuit includes a low-frequency ripple sampling circuit and a high-frequency ripple suppression circuit: the input terminal of the adjustment circuit is the input terminal of the low-frequency ripple sampling circuit, the output terminal of the adjustment circuit is the output terminal of the high-frequency ripple suppression circuit, and the output terminal of the low-frequency ripple sampling circuit is connected to the input terminal of the high-frequency ripple suppression circuit; or the input terminal of the adjustment circuit is the input terminal of the high-frequency ripple suppression circuit, the output terminal of the adjustment circuit is the output terminal of the low-frequency ripple sampling circuit, and the output terminal of the high-frequency ripple suppression circuit is connected to the input terminal of the low-frequency ripple sampling circuit.

[0007] In this embodiment, the low-frequency ripple sampling circuit and the high-frequency ripple suppression circuit are coupled between the voltage input interface and the output interface. They perform segmented and precise processing of ripple in different frequency ranges, enabling both sampling feedback of low-frequency ripple and direct suppression of high-frequency ripple. The adjustment circuit effectively suppresses ripple across the entire frequency band through the series connection of the low-frequency ripple sampling circuit and the high-frequency ripple suppression circuit, meeting the operating requirements of sensitive loads.

[0008] In one possible implementation, if the regulating circuit further includes a voltage comparator circuit, the input terminal of the voltage comparator circuit is connected to the output terminal of the regulating circuit.

[0009] In this embodiment, the voltage comparison circuit is connected to the output of the adjustment circuit. After suppressing ripple, the voltage signal can be adjusted based on a reference signal indicating the difference between the voltage signal and the target voltage signal. The adjustment circuit outputs the adjustment signal, thereby adjusting the stability of the voltage signal.

[0010] In one possible implementation, when the regulating circuit includes a voltage comparator circuit, the input terminal of the regulating circuit is the input terminal of the voltage comparator circuit, and the output terminal of the regulating circuit is connected to the input terminal of the voltage comparator circuit.

[0011] In this embodiment, a voltage comparison circuit can be set separately. The voltage comparison circuit is independently coupled between the voltage input interface and the output interface, which effectively improves the stability of the output voltage.

[0012] In one possible implementation, the adjustment device further includes: a data transmission interface disposed on the shielded box for connection to a communication interface of the power supply; wherein the data transmission interface is used to connect to the sampling terminal of the low-frequency ripple sampling circuit, so that the low-frequency ripple sampling circuit feeds back a first sampling signal to the power supply via the data transmission interface; the data transmission interface is used to connect to the output terminal of the voltage comparison circuit, so that the voltage comparison circuit feeds back a reference signal to the power supply via the data transmission interface.

[0013] In this embodiment, the regulating device is provided with a voltage input interface and a data transmission interface. The voltage input interface is used to input voltage signals, and the data transmission interface is used to transmit communication signals. This embodiment separates the voltage signal and communication signal transmission to avoid mutual interference, improve the accuracy of communication signal transmission and the storage accuracy of voltage signals, thereby enhancing the reliability of the regulating device and the power supply.

[0014] In one possible implementation, the voltage of the power supply is greater than or equal to 50 kV; and / or the power of the power supply is less than 50 watts.

[0015] In this embodiment, the regulating device is suitable not only for low-power power supply scenarios with a power output of less than 50 watts, but also for high-voltage power supply scenarios with an output voltage greater than or equal to 50 kV. Through the adjustment circuit and shielding box configuration, the regulating device can ensure high-voltage insulation and low-power power supply stability.

[0016] In one possible implementation, the low-frequency ripple sampling circuit includes: a capacitor voltage divider circuit and a first operational amplifier. The capacitor voltage divider circuit includes a first capacitor, a second capacitor, and a third capacitor. A first terminal of the first capacitor is connected to a voltage input interface and also to the input terminal of an output interface. A second terminal of the first capacitor is connected to the first terminal of the second capacitor. The second terminal of the second capacitor is connected to a first reference voltage terminal. A first terminal of the third capacitor is connected to the second terminal of the first capacitor. The capacitor voltage divider circuit is used to extract low-frequency ripple from the voltage signal. The input terminal of the low-frequency ripple sampling circuit is the first terminal of the first capacitor. The non-inverting input terminal of the first operational amplifier is connected to the second terminal of the third capacitor, and the inverting input terminal of the first operational amplifier is connected to a data transmission interface. This is used to convert the low-frequency ripple in the voltage signal into a first sampling signal, which is then fed back to the power supply via the data transmission interface. The output terminal of the first operational amplifier is the sampling terminal of the low-frequency ripple sampling circuit.

[0017] In this embodiment, the capacitive voltage divider circuit utilizes the capacitive reactance characteristic of capacitors to low-frequency signals to specifically separate low-frequency ripple in the voltage signal, avoiding interference from high-frequency components and improving the accuracy of low-frequency ripple extraction. The first operational amplifier samples the low-frequency ripple and feeds it back to the power supply, causing the power supply to adjust the low-frequency ripple in response to the first sampling signal.

[0018] In one possible implementation, the high-frequency ripple suppression circuit is a low-pass filter. The input terminal of the low-pass filter is connected to the voltage input interface, and the output terminal of the low-pass filter is connected to the input terminal of the output interface.

[0019] In this embodiment, the low-pass filter has the characteristic of allowing low-frequency signals to pass through and suppressing high-frequency signals. The high-frequency ripple suppression circuit is a low-pass filter, which can accurately intercept high-frequency ripples from the mixed voltage signal, avoid functional overlap with the low-frequency ripple sampling circuit, and achieve targeted processing of high-frequency ripples. This circuit only specifically suppresses high-frequency ripples and will not cause attenuation or interference to the main voltage signal. While filtering out high-frequency ripples, it ensures the stability of the amplitude of the output voltage signal.

[0020] In one possible implementation, the low-pass filter includes a multi-stage resistor-capacitor filter.

[0021] In this embodiment, compared to a single-stage structure, multi-stage resistor-capacitor filtering exhibits a greater attenuation slope for high-frequency signals, more effectively filtering out ripple in the second frequency range and improving the purity of the output voltage signal. The resistor-capacitor structure requires no active components; filtering can be achieved solely through a combination of passive components, avoiding stability issues caused by complex circuits and balancing filtering performance with reliability.

[0022] In one possible implementation, the voltage comparison circuit includes: a sampling circuit and a second operational amplifier. The sampling circuit includes a first resistor, a second resistor, and a sampling terminal. A first terminal of the first resistor is connected to the input terminal of the output interface. A second terminal of the first resistor is connected to the first terminal of the second resistor. The second terminal of the second resistor is connected to a first reference voltage terminal. The sampling terminal of the sampling circuit is connected to the second terminal of the first resistor. The sampling circuit is used to acquire a voltage signal to obtain a second sampled voltage signal. The input terminal of the voltage comparison circuit is the first terminal of the first resistor. The first input terminal of the second operational amplifier is connected to the sampling terminal of the sampling circuit. The input of the second input terminal of the second operational amplifier is the target voltage signal. The output terminal of the second operational amplifier is connected to a data transmission interface. It is used to convert the difference between the target voltage signal and the second sampled voltage signal into a reference signal and output the reference signal to the power supply via the data transmission interface. The output terminal of the second operational amplifier is the output terminal of the voltage comparison circuit.

[0023] In this embodiment, the sampling circuit can stably acquire the real-time state of the voltage signal, providing accurate data for voltage regulation. The second operational amplifier, acting as the comparison core, can quickly perform difference calculations on the target voltage signal and the sampled voltage signal, outputting the result to the power supply or the processing circuit in the regulation circuit. This enables real-time correction of the voltage signal, ensuring the output voltage remains stable at the target voltage signal and improving the stability of the power supply output.

[0024] In one possible implementation, the adjustment device further includes: a processing circuit, a first terminal of which is connected to the sampling terminal of a low-frequency ripple sampling circuit, such that the low-frequency ripple sampling circuit feeds back a first sampling signal to the processing circuit via the first terminal of the processing circuit; a second terminal of the processing circuit is connected to the output terminal of a voltage comparator circuit, such that the voltage comparator circuit feeds back a reference signal to the processing circuit via the second terminal of the processing circuit; and a third terminal of the processing circuit is connected to a first reference voltage terminal. The processing circuit is used to output an adjustment signal to the first reference voltage terminal via the third terminal of the processing circuit based on the first sampling signal and the reference signal, so as to adjust the voltage signal.

[0025] In this embodiment, the processing circuit integrates low-frequency ripple data and voltage deviation information, and generates an adjustment signal after comprehensive analysis to regulate the input voltage signal. This can suppress low-frequency ripple and improve voltage output stability. The processing circuit can correct the power supply output characteristics in real time, quickly respond to load changes or ripple fluctuations, and ensure continuous and stable power supply output.

[0026] Secondly, this application provides a power supply system, including: multiple power sources; and multiple regulating devices as described in the first aspect, wherein each regulating device corresponds to one of the multiple power sources.

[0027] In this embodiment, the power supply system can simultaneously and independently adjust multiple power supplies, with each power supply matched with a dedicated adjustment device, which can specifically address the ripple and voltage issues of different power supplies.

[0028] In one possible implementation, the power supply system further includes a control device coupled to a plurality of regulating devices and a plurality of power sources, for communicating between each regulating device and its corresponding power source.

[0029] In the embodiments of this application, the coordination of multiple power supply regulation can be achieved through a control device to adapt to multiple power supply scenarios.

[0030] In one possible implementation, the control device is specifically used to communicate between the voltage comparison circuit and the power supply in the regulating device.

[0031] In this embodiment, the control device does not need to handle the communication of all modules, reducing the complexity of communication management. At the same time, it can centrally detect the communication status of each power supply and the corresponding voltage comparison circuit, which facilitates the rapid location of communication faults related to voltage regulation and improves system maintenance efficiency.

[0032] In one possible implementation, the regulating device is connected to the power supply via a shielded cable.

[0033] In this embodiment, the cable shielding layer effectively isolates external electromagnetic interference, preventing interference signals from intruding into the transmission link and superimposing them onto voltage or communication signals, thus ensuring the accuracy of signal transmission and providing a reliable original signal for subsequent ripple adjustment and voltage control. Simultaneously, the shielding layer helps isolate dust and moisture, extending the cable's lifespan and ensuring long-term stable signal and power transmission between the device and the power supply.

[0034] In one possible implementation, the second reference voltage terminal of the power supply is coupled to the shielding layer.

[0035] In this embodiment, coupling the shielding layer to the second reference voltage terminal allows the shielding layer to form a stable equipotential surface, more effectively blocking external electromagnetic interference from entering the cable, preventing interference signals from affecting the transmitted signal through capacitive coupling between the shielding layer and the signal line, and improving the anti-interference effect. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the trajectory of a particle in a high-voltage electric field provided in an embodiment of this application; Figure 2 This is a schematic diagram of a power supply system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an adjustment device provided in an embodiment of this application; Figure 4 This is a schematic diagram of another adjusting device provided in an embodiment of this application; Figure 5 This is a schematic diagram of another adjusting device provided in an embodiment of this application; Figure 6 This is a schematic diagram of another power supply system provided in an embodiment of this application; Figure 7This is a schematic diagram of another power supply system provided in an embodiment of this application; Figure 8 This is a schematic diagram of another power supply system provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures: 30-Power supply; 301 - Inverter circuit; 302 - Transformer; 303 - Voltage multiplier circuit; 304 - Drive circuit; 305 - High voltage sampling circuit; 306 - Control circuit; 40 - Adjustment device; 401 - Adjustment circuit; 402 - Shielding box; In1 - Voltage input interface; In2 - Data transmission interface; Out - Output interface; 4011 - Low-frequency ripple sampling circuit; 4012 - High-frequency ripple suppression circuit; 4013 - Voltage comparator circuit; 4014 - Processing circuit; 501 - Capacitor voltage divider circuit; 502 - Sampling circuit; A1 - First operational amplifier; A2 - Second operational amplifier; C1 - First capacitor; C2 - Second capacitor; C3 - Third capacitor; C4 - Fourth capacitor; C5 - Fifth capacitor; C6 - Sixth capacitor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; 50 - Control device. Detailed Implementation

[0039] It should be noted that the terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0040] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0041] The terms “coupling,” “coupled,” and “connection” used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices.

[0042] A power supply is a device that converts electrical energy into power to provide electrical energy to a load. Issues such as non-ideal energy conversion, electromagnetic interference (EMI) in the environment, or variations in the characteristics of internal components can all lead to ripple and instability in the power supply's output signal.

[0043] If the load is a cutting-edge device with stringent requirements for power supply ripple and stability, such as an electron microscope or electron beam equipment, then the power supply needs to achieve extremely low ripple and stability.

[0044] Taking an electron beam device as an example, in this scenario, a high-voltage power supply (HVPS) is needed to generate a high-voltage electric field to extract, collimate, and expand the electron beam. If the output voltage of the high-voltage power supply has ripple, it will cause instantaneous fluctuations in the high-voltage electric field. Furthermore, particles in the high-voltage electric field will experience instantaneous fluctuations, leading to errors.

[0045] like Figure 1 The diagram shows a schematic of the motion trajectory of a particle in a high-voltage electric field according to an embodiment of this application, where the solid line represents the preset particle trajectory and the dashed line represents the actual particle trajectory.

[0046] To ensure the accurate operation of such devices, it is necessary to guarantee the ripple and stability of the power supply output voltage.

[0047] Ripple is categorized into high-frequency ripple (i.e., ripple with a frequency higher than the preset frequency) and low-frequency ripple (i.e., ripple with a frequency lower than the preset frequency). High-frequency ripple is a high-frequency periodic AC component superimposed on the power supply output voltage, typically with a frequency between 50kHz and 50MHz. Low-frequency ripple is a low-frequency periodic AC component superimposed on the power supply output voltage, typically with a frequency around the power frequency (50 / 60Hz) or its harmonics. Stability refers to the power supply's ability to maintain its output voltage / current stable at the set value under various operating conditions.

[0048] The rapid switching of switching devices in a power supply can cause instantaneous fluctuations in the output voltage, resulting in high-frequency ripples that are consistent with the switching frequency. Parasitic inductance and capacitance in the switching power supply can cause oscillations during the switching process, exacerbating the high-frequency ripples. Insufficient attenuation of high frequencies in the filtering stage makes it difficult to effectively filter out high-frequency components, resulting in some high-frequency ripples remaining.

[0049] After rectification, the power frequency AC power will retain a small amount of low-frequency components related to the power frequency. These components are filtered, but the filtering effect is limited, resulting in low-frequency ripple. In addition, low-frequency EMI in the power supply's surrounding environment enters the power supply output circuit through coupling, which will also generate additional low-frequency ripple.

[0050] The drift of the characteristics of various components in the power supply, the poor performance of the power supply's feedback regulation loop, and the fluctuations in the environment in which the power supply is located can all affect the stability of the power supply output.

[0051] In some embodiments, in high-voltage power supplies, high-frequency ripple is suppressed by controlling the parasitic parameters of various components, optimizing EMI design, and strengthening filtering. Low-frequency ripple is suppressed through pre-stage filtering and feedforward regulation. By selecting low-temperature drift, high-precision link devices, the stability of the power supply output is ensured at the hardware level, and loop regulation compensation is used to offset voltage deviations caused by stability issues.

[0052] With technological advancements, cutting-edge equipment has increasingly stringent requirements for power supply ripple and stability. Therefore, a regulating device that can reduce production costs and adapt to different power supplies is urgently needed.

[0053] Example 1: In view of this, in order to solve one or more of the above-mentioned technical problems, this application provides a regulating device that can be applied to a power supply system, such as... Figure 2 The diagram shows a power supply system provided in an embodiment of this application. The power supply system 2 includes a power supply 30 and an adjustment device 40.

[0054] As one implementation, power supply 30 is a high-voltage power supply. For example, the voltage of power supply 30 is greater than or equal to 50 kilovolts.

[0055] As one implementation, power supply 30 is a low-power power supply. For example, the power supply 30 has a power of less than 50 watts.

[0056] The regulating device 40 is coupled to the power supply 30. The regulating device 40 can suppress the ripple of the output voltage of the power supply 30, improve the stability of the power supply 30, and thus supply power to the load connected after the regulating device 40.

[0057] The power supply 30 and the regulating device 40 are connected by connectors and cables. The power supply 30 and the regulating device 40 also transmit high-voltage divided AC sampling signals, high-voltage divided DC sampling signals and other signals other than analog signals through a communication method with strong anti-interference capability.

[0058] Communication methods with strong anti-interference capabilities can include, but are not limited to, Controller Area Network (CAN) bus and Recommended Standard 485 (RS485) bus.

[0059] The regulating device 40 is connected to the power supply 30 via connectors and cables.

[0060] like Figure 3The diagram shows a schematic of the structure of an adjustment device provided in an embodiment of this application. The adjustment device 40 includes: a voltage input interface In1, an adjustment circuit 401, an output interface Out, and a shielding box 402.

[0061] The voltage input interface In1 is used to connect to the power supply 30 to receive the voltage signal output by the power supply 30.

[0062] The input terminal of the output interface Out is connected to the output terminal of the regulation circuit 401, and the output terminal of the output interface Out is also used to connect to the load to output the regulated voltage signal.

[0063] The voltage input interface In1 and the output interface Out are located on the shielding box 402, and the adjustment circuit 401 is located inside the shielding box 402.

[0064] The input terminal of the adjustment circuit 401 is connected to the voltage input interface and is used to adjust the ripple of the voltage signal and / or the stability of the voltage signal.

[0065] The adjustment circuit 401 may include at least one of the following circuits: a low-frequency ripple sampling circuit 4011, a high-frequency ripple suppression circuit 4012, and a voltage comparison circuit 4013, for adjusting the ripple of the voltage signal and / or the stability of the voltage signal.

[0066] Ripple includes low-frequency ripple and high-frequency ripple. The frequency of low-frequency ripple is lower than that of high-frequency ripple. The frequency range of low-frequency ripple typically includes the power frequency of 50 / 60Hz and its harmonics, while the frequency range of high-frequency ripple is typically from 50kHz to 50MHz.

[0067] The low-frequency ripple sampling circuit 4011 is used to sample the low-frequency ripple of the voltage signal to obtain a first sampling signal, so that the power supply 30 adjusts the low-frequency ripple in response to the first sampling signal.

[0068] The high-frequency ripple suppression circuit 4012 is used to suppress high-frequency ripple in voltage signals.

[0069] The voltage comparison circuit 4013 is used to determine a reference signal representing the difference between the voltage signal and the target voltage signal, so that the power supply 30 adjusts the voltage signal in response to the reference signal so that the absolute value of the difference between the voltage signal and the target voltage signal is less than a preset threshold.

[0070] The power supply 30 typically incorporates a proportional-integral-derivative (PID) controller. This PID controller can correct the voltage signal input to the regulation circuit 401 based on a first sampled signal by superimposing a signal opposite to the first sampled signal onto the voltage signal to suppress low-frequency ripple. The PID controller can also adjust the second reference voltage terminal of the power supply 30, or adjust the duty cycle of the power supply 30's output voltage, based on a reference signal, to ensure that the absolute value of the difference between the voltage signal and the target voltage signal is less than a preset threshold, thereby improving the stability of the voltage signal.

[0071] In this embodiment, the target voltage signal can be set according to actual application needs. For example, it can be a set reference voltage. The voltage comparison circuit 4013 adjusts the voltage signal so that the absolute value of the difference between the amplitude of the adjusted voltage signal or the corresponding voltage value and the target voltage signal is less than a preset threshold. The proportion of ripple in the adjusted voltage signal is less than the proportion of ripple in the input voltage signal, or the stability of the adjusted voltage signal is higher than the stability of the input voltage signal. For example, if the proportion of ripple in the input voltage signal is an initial proportion (e.g., 10 ppm), and the proportion of ripple in the adjusted voltage signal is a target proportion (e.g., 1 ppm), the smaller the proportion of ripple in the adjusted voltage signal, the better the ripple suppression effect. Another example is that if the ratio of the preset threshold to the target voltage signal is less than 1 ppm, the stability of the voltage signal is less than 1 ppm.

[0072] In the above embodiments, the shielding box 402 can be made of metal or magnetic materials to reduce external noise interference. The shielding box 402 is encapsulated with insulating material. The insulating material encapsulated inside the shielding box 402 can be silicone or rubber to achieve voltage-resistant insulation.

[0073] The insulating material not only isolates different circuits and components within the shielding box 402, but also further absorbs and blocks electromagnetic signals, reducing crosstalk between different circuits within the shielding box 402. Simultaneously, it fixes the positions of circuit components, ensuring circuit connection stability. Furthermore, the insulating material protects the circuits within the shielding box 402, preventing corrosion of individual components and extending the service life of the regulating device.

[0074] In this embodiment, the regulating device 40 is a separate module. The regulating device 40 is connected to an external power supply 30 through a unified voltage input interface In1 shielded box and an output interface Out. It can be adapted to any power supply 30 to improve the performance indicators of the power supply 30. It can optimize the relevant performance indicators (such as high frequency ripple ratio, low frequency ripple ratio, and output voltage drift indicators) from the initial indicators (such as 10ppm) to the target indicators (such as 1ppm). Moreover, the regulating device 40 has high flexibility and can adapt to different power supplies and load scenarios.

[0075] In some embodiments, the target circuit specifically included in the adjustment circuit 401 (the target circuit includes at least one of the low-frequency ripple sampling circuit 4011, the high-frequency ripple suppression circuit 4012, and the voltage comparison circuit 4013) can be determined according to the target performance requirements (such as the target performance may include the ripple ratio in the voltage signal or the stability of the voltage signal). For example, if the target performance is to reduce the low-frequency ripple ratio in the voltage signal and the adjustment circuit 401 is used to adjust the low-frequency ripple, then the adjustment circuit 401 may include the low-frequency ripple sampling circuit 4011. If the target performance is to reduce the high-frequency ripple ratio in the voltage signal and the adjustment circuit 401 is used to adjust the high-frequency ripple, then the adjustment circuit 401 may include the high-frequency ripple suppression circuit 4012. If the target performance is to improve the stability of the voltage signal and the adjustment circuit 401 is used to adjust the stability, then the adjustment circuit 401 may include the voltage comparison circuit 4013.

[0076] In some examples, when the adjustment circuit 401 includes a low-frequency ripple sampling circuit 4011 and a high-frequency ripple suppression circuit 4012: the input terminal of the adjustment circuit 401 is the input terminal of the low-frequency ripple sampling circuit 4011, the output terminal of the adjustment circuit 401 is the output terminal of the high-frequency ripple suppression circuit 4012, and the output terminal of the low-frequency ripple sampling circuit 4011 is connected to the input terminal of the high-frequency ripple suppression circuit 4012.

[0077] In other examples, where the adjustment circuit 401 includes a low-frequency ripple sampling circuit 4011 and a high-frequency ripple suppression circuit 4012: the input terminal of the adjustment circuit 401 is the input terminal of the high-frequency ripple suppression circuit 4012, the output terminal of the adjustment circuit 401 is the output terminal of the low-frequency ripple sampling circuit 4011, and the output terminal of the high-frequency ripple suppression circuit 4012 is connected to the input terminal of the low-frequency ripple sampling circuit 4011.

[0078] Optionally, in addition to the low-frequency ripple sampling circuit 4011 and the high-frequency ripple suppression circuit 4012, the voltage comparison circuit 4013 is also included, in which case the input terminal of the voltage comparison circuit 4013 is connected to the output terminal of the adjustment circuit 401.

[0079] In some examples, where the regulating circuit 401 includes a voltage comparator circuit 4013, the input terminal of the regulating circuit 401 is the input terminal of the voltage comparator circuit 4013, and the output terminal of the regulating circuit 401 is connected to the input terminal of the voltage comparator circuit 4013.

[0080] The adjustment circuit 401 may also include multiple circuits such as the low-frequency ripple sampling circuit 4011, the high-frequency ripple suppression circuit 4012, and the voltage comparison circuit 4013 to meet different target performance requirements.

[0081] In this embodiment, at least two implementation methods are provided for regulating the voltage signal: In a first implementation, the adjustment circuit 401 acquires a voltage signal and / or a target voltage signal, suppresses high-frequency ripple in the voltage signal, or samples low-frequency ripple in the voltage signal, and feeds back a first sampled signal to the power supply 30, or feeds back the difference between the voltage signal and the target voltage signal—a reference signal—to the power supply 30. The power supply 30 can adjust the low-frequency ripple in response to the first sampled signal, and / or adjust the stability of the voltage signal in response to the reference signal.

[0082] In the second embodiment, the adjustment circuit 401 adjusts the input voltage signal by acquiring the voltage signal and / or the target voltage signal (i.e., closed-loop adjustment within the adjustment circuit 401) to adjust the ripple signal in the voltage signal and / or adjust the stability of the voltage signal.

[0083] Next, we will combine Figure 3 , Figure 4 , Figure 5 The first implementation method will be described below. Figure 3 , Figure 4 , Figure 5 These are all schematic diagrams of the adjustment device provided in the embodiments of this application.

[0084] For the first implementation method, in some embodiments, such as Figure 3 As shown, the voltage input interface In1 is also used to transmit communication signals to enable communication between the regulation circuit 401 and the power supply 30. The simultaneous use of the voltage input interface In1 for both voltage and communication signal transmission saves interface resources in the regulation device 40 and simplifies adaptation complexity.

[0085] In other embodiments, such as Figure 4 As shown, the regulating device 40 also includes a data transmission interface In2, which is disposed on the shielding box 402. The data transmission interface In2 is used to connect to the communication interface of the power supply 30 to transmit communication signals.

[0086] The data transmission interface In2 is used to connect to the sampling terminal of the low-frequency ripple sampling circuit 4011, so that the low-frequency ripple sampling circuit 4011 feeds back the first sampling signal to the power supply 30 via the data transmission interface In2.

[0087] Specifically, the data transmission interface In2 is also used to connect to the output of the voltage comparison circuit 4013, so that the voltage comparison circuit 4013 feeds back the reference signal to the power supply 30 via the data transmission interface In2.

[0088] The data transmission interface In2 can transmit signals bidirectionally at the same time. In some implementations, the data transmission interface In2 is a bidirectional parallel port. For example, the data transmission interface In2 is a D-subminiature connector (DB).

[0089] In this embodiment, by providing a voltage input interface and a data transmission interface in the regulating device 40, wherein the voltage input interface is used to input voltage signals and the data transmission interface is used to transmit communication signals, the voltage signals and communication signals are transmitted separately to avoid mutual interference, improve the accuracy of communication signal transmission and the storage accuracy of voltage signals, thereby enhancing the reliability of the regulating device and the power supply.

[0090] Taking the regulating device 40, which is equipped with a voltage input interface In1 and a data transmission interface In2, as an example, the specific regulating process of the voltage signal will be explained.

[0091] In some examples, the adjustment circuit 401 includes a low-frequency ripple sampling circuit 4011 for sampling the low-frequency ripple of the voltage signal to obtain a first sampling signal, so that the power supply 30 adjusts the low-frequency ripple in response to the first sampling signal.

[0092] After rectification, the power frequency AC power will have a small amount of low frequency components related to the power frequency remaining. These components are filtered, but the filtering effect is limited, resulting in low frequency ripple. In addition, the low frequency EMI in the environment around the power supply 30 will also generate additional low frequency ripple, which enters the output circuit of the power supply 30 through coupling and then enters the regulating device 40.

[0093] like Figure 5 As shown, the low-frequency ripple sampling circuit 4011 is coupled between the voltage input interface In1 and the output interface Out, and is also coupled to the data transmission interface In2.

[0094] The low-frequency ripple sampling circuit 4011 includes: a capacitor voltage divider circuit 501 and a first operational amplifier A1.

[0095] The capacitor voltage divider circuit 501 is coupled to the voltage input interface In1, the output interface Out and the first reference voltage terminal G1 respectively, and the first operational amplifier A1 is coupled between the capacitor voltage divider circuit 501 and the data transmission interface In2.

[0096] The capacitor voltage divider circuit 501 consists of three capacitors: a first capacitor C1, a second capacitor C2, and a third capacitor C3.

[0097] The first terminal of the first capacitor C1 is connected to the voltage input interface In1 and also to the input terminal of the output interface Out. The second terminal of the first capacitor C1 is connected to the first terminal of the second capacitor C2. The second terminal of the second capacitor C2 is connected to the first reference voltage terminal G1. The first terminal of the third capacitor C3 is connected to the second terminal of the first capacitor C1. The input terminal of the low-frequency ripple sampling circuit 4011 is the first terminal of the first capacitor C1.

[0098] The capacitor voltage divider circuit 501 is used to extract low-frequency ripple in the voltage signal.

[0099] The non-inverting input of the first operational amplifier A1 is connected to the second terminal of the third capacitor C3, and the inverting input of the first operational amplifier A1 is connected to the data transmission interface In2. This is used to convert the low-frequency ripple in the voltage signal into a first sampling signal, so that the first sampling signal is fed back to the power supply 30 via the data transmission interface In2. The output of the first operational amplifier A1 is the sampling terminal of the low-frequency ripple sampling circuit 4011.

[0100] In this embodiment, the first operational amplifier A1 is used as a voltage follower to isolate the influence of the load (the component connected to the output of the first operational amplifier) ​​on the capacitor voltage divider circuit 501. Utilizing the capacitive reactance of the capacitor to low-frequency signals, low-frequency ripple in the voltage signal can be selectively separated, avoiding high-frequency interference and improving the accuracy of low-frequency ripple extraction. Furthermore, the first sampling signal is fed back to the power supply 30 via the first operational amplifier A1, so that the power supply 30 adjusts the low-frequency ripple in response to the first sampling signal.

[0101] In other examples, the regulation circuit 401 includes a high-frequency ripple suppression circuit 4012 to suppress high-frequency ripple in the voltage signal.

[0102] The rapid switching of switching devices in a power supply causes instantaneous fluctuations in the output voltage, forming high-frequency ripples that match the switching frequency. Parasitic inductance and capacitance in the switching power supply will oscillate during the switching process, exacerbating the high-frequency ripples. The high-frequency attenuation of the filtering stage is insufficient, making it difficult to effectively filter out high-frequency components, resulting in some high-frequency ripples remaining.

[0103] like Figure 5As shown, the high-frequency ripple suppression circuit 4012 is coupled between the voltage input interface In1 and the output interface Out.

[0104] In some examples, the high-frequency ripple suppression circuit 4012 can be a low-pass filter. The input of the low-pass filter is connected to the voltage input interface In1, and the output of the low-pass filter is connected to the input of the output interface Out.

[0105] Low-pass filters have the characteristic of allowing low-frequency signals to pass through while suppressing high-frequency signals. High-frequency ripple suppression circuits are low-pass filters that can remove high-frequency ripple from voltage signals, achieving targeted processing of high-frequency ripple.

[0106] In one example, the low-pass filter may include a multi-stage resistor-capacitor filter, such as Figure 5 As shown, a low-pass filter can include a two-stage resistor-capacitor filter.

[0107] The low-pass filter includes a third resistor R3, a fourth resistor R4, a fourth capacitor C4, and a fifth capacitor C5.

[0108] The first terminal of the third resistor R3 is connected to the voltage input interface In1. The second terminal of the third resistor R3 is connected to the first terminal of the fourth capacitor C4. The second terminal of the fourth capacitor C4 is connected to the first reference voltage terminal G1. The first terminal of the fourth resistor R4 is connected to the second terminal of the third resistor R3. The second terminal of the fourth resistor R4 is connected to the first terminal of the fifth capacitor C5. The second terminal of the fifth capacitor C5 is connected to the first reference voltage terminal G1.

[0109] Compared to single-stage structures, multi-stage resistor-capacitor filters have a greater attenuation slope for high-frequency signals, can more effectively filter out high-frequency ripple, and improve the purity of the output voltage signal.

[0110] In some other examples, the regulation circuit 401 includes a voltage comparator circuit 4013 that regulates the stability of the input voltage signal.

[0111] like Figure 5 As shown, the voltage comparison circuit 4013 is coupled between the voltage input interface In1 and the output interface Out, and is also coupled to the data transmission interface In2.

[0112] The voltage comparator circuit 4013 includes a sampling circuit 502 and a second operational amplifier A2. The sampling circuit 502 is coupled to the input terminal of the output interface Out and the first reference voltage terminal G1.

[0113] The sampling circuit 502 includes a first resistor R1, a second resistor R2, and a sampling terminal of the sampling circuit 502.

[0114] The first end of the first resistor R1 is connected to the input end of the output interface Out. The second end of the first resistor R1 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is connected to the first reference voltage terminal G1. The sampling terminal of the sampling circuit 502 is connected to the second end of the first resistor R1. The input terminal of the voltage comparison circuit 4013 is the first end of the first resistor R1.

[0115] The sampling circuit 502 is used to acquire voltage signals to obtain a second sampled voltage signal.

[0116] The first reference voltage terminal G1 is the reference voltage terminal for the power supply 30 to adjust the output voltage through the output regulating device 40. The voltage difference between the output interface Out and the first reference voltage terminal G1 is the voltage output by the power supply 30 after adjustment by the output regulating device 40.

[0117] In one example, the first reference voltage terminal G1 may be the ground terminal in the regulating device 40.

[0118] The first input terminal of the second operational amplifier A2 is connected to the sampling terminal of the sampling circuit 502, and the input to the second input terminal of the second operational amplifier A2 is the target voltage signal. The output terminal of the second operational amplifier A2 is connected to the data transmission interface In2. In other words, the target voltage signal is a reference voltage. It should be understood that the reference voltage can be set based on actual conditions. For example, the reference voltage can be determined based on the desired voltage value output by the output interface Out.

[0119] The voltage comparator circuit 4013 also includes a fifth resistor R5 and a sixth capacitor C6 disposed between the first input terminal of the second operational amplifier A2 and the output terminal of the second operational amplifier A2.

[0120] Specifically, the fifth resistor R5 and the sixth capacitor C6 are connected in series between the first input terminal and the output terminal of the second operational amplifier A2. The first end of the fifth resistor R5 is connected to the first input terminal of the second operational amplifier A2, the second end of the fifth resistor R5 is connected to the first end of the sixth capacitor C6, and the second end of the sixth capacitor C6 is connected to the output terminal of the second operational amplifier A2.

[0121] The sampling circuit 502 is used to acquire the voltage signal to obtain a second sampled voltage signal. The second sampled voltage signal is input to the first input terminal of the second operational amplifier A2, and the output terminal of the second operational amplifier A2 is the output terminal of the voltage comparison circuit 4013. The second operational amplifier A2 is used to convert the difference between the target voltage signal and the second sampled voltage signal into a reference signal, and output the reference signal to the power supply 30 via the data transmission interface In2. As some embodiments, the target voltage signal is introduced externally. For example, the target voltage signal is introduced via a Controller Area Network (CAN) bus, that is, the second input terminal of the second operational amplifier is connected to the CAN bus.

[0122] In this embodiment, the second operational amplifier A2 serves as the comparison core, enabling it to quickly perform difference calculations on the target voltage signal and the sampled voltage signal, and output the result to the power supply 30 or the processing circuit inside the adjustment circuit 401. This allows for real-time correction of the voltage signal, ensuring that the output voltage remains stable at the target voltage signal and improving the stability of the power supply 30's output.

[0123] In this embodiment of the application, the parameters of each component in the regulating device 40 can be set according to the voltage level of the power supply 30.

[0124] For example, the parameters of the same component in the regulating device 40 are set to be different for output voltages of 10kV, 30kV, and 60kV.

[0125] Combination Figure 6 The first implementation method will be further described below. Figure 6 This is a schematic diagram of a power supply system provided in an embodiment of this application.

[0126] In one example, power supply 30 includes: inverter circuit 301, transformer 302, voltage multiplier circuit 303, drive circuit 304, high voltage sampling circuit 305, and control circuit 306 (which may be a PID controller).

[0127] The inverter circuit 301, transformer 302, and voltage multiplier circuit 303 are connected in sequence, and a voltage signal is sent to the regulating device 40 through the voltage input interface In1 of the regulating device 40.

[0128] The high-frequency ripple suppression circuit 4012 is coupled to the voltage input interface In1 to process the high-frequency ripple in the voltage signal. The high-frequency ripple suppression circuit 4012 can suppress the high-frequency ripple through its level filtering.

[0129] In power supply 30, high voltage sampling circuit 305 is coupled to the output terminal of voltage multiplier circuit 303 and control circuit 306 respectively, and is used to sample the voltage signal output by power supply 30.

[0130] The second operational amplifier A2 in the voltage comparison circuit 4013 compares the target voltage signal and the sampled voltage signal, and feeds the comparison result back to the power supply 30 to adjust the second reference voltage terminal G2 of the power supply 30 and improve the stability of the voltage output.

[0131] In this embodiment, by adjusting the second reference voltage terminal G2 of the power supply 30, the voltage signal output by the power supply 30 is stabilized at the target voltage, thereby improving the stability of its voltage output.

[0132] In the low-frequency ripple sampling circuit 4011, the capacitor voltage divider circuit 501 is used to extract the low-frequency analog component in the voltage signal, namely the first sampling signal. The low-frequency analog component is input to the non-inverting input terminal of the first operational amplifier A1, and the sampling signal output by the high-voltage sampling circuit 305 is input to the inverting input terminal of the first operational amplifier A1. Through the processing of the first operational amplifier A1, the proportion of low-frequency analog component feedback can be increased, realizing the superposition of low-frequency analog component and sampling signal, and then output to the control circuit 306.

[0133] The control circuit 306 sends a control signal to the drive circuit 304 based on the signal output by the first operational amplifier A1, causing the drive circuit 304 to drive the inverter circuit 301. Through the cooperation of the drive circuit 304 and the inverter circuit 301, compensation is performed for the voltage deviation caused by low-frequency ripple, thereby suppressing the low-frequency ripple.

[0134] For the second implementation method, such as Figure 7 As shown, the regulating device 40 also includes a processing circuit 4014. For example, the processing circuit 4014 is a PID circuit based on an operational amplifier.

[0135] The processing circuit 4014 is coupled to the low-frequency ripple sampling circuit 4011, the voltage comparison circuit 4013 and the first reference voltage terminal G1.

[0136] Specifically, the first terminal of the processing circuit 4014 is connected to the sampling terminal of the low-frequency ripple sampling circuit 4011, the second terminal of the processing circuit 4014 is connected to the output terminal of the voltage comparison circuit 4013, and the third terminal of the processing circuit 4014 is connected to the first reference voltage terminal G1 through the sixth resistor R6.

[0137] The processing circuit 4014 is used to output an adjustment signal to the first reference voltage terminal G1 via its third terminal, based on the first sampled signal and the reference signal, to adjust the voltage signal. Here, the third terminal of the processing circuit 4014 is also connected to the second reference voltage terminal G2. The first reference voltage terminal G1 and the second reference voltage terminal G2 can be the same reference voltage terminal, such as being a ground terminal.

[0138] The high-voltage sampling circuit 305 provides the target voltage signal to the voltage comparison circuit 4013 of the regulating device 40.

[0139] The second operational amplifier A2 in the voltage comparison circuit 4013 compares the target voltage signal and the second sampled voltage signal, converts the difference between the target voltage signal and the second sampled voltage signal into a reference signal, and then feeds the reference signal back to the processing circuit 4014 via the second terminal of the processing circuit 4014.

[0140] In the low-frequency ripple sampling circuit 4011, the capacitor voltage divider circuit 501 is used to extract the low-frequency analog component in the voltage signal. The first input terminal of the first operational amplifier A1 receives the low-frequency analog component, and the second input terminal of the first operational amplifier A1 receives the sampling signal output by the high-voltage sampling circuit 305. The low-frequency ripple sampling circuit 4011 feeds back the first sampling signal to the processing circuit 4014 via the first terminal of the processing circuit 4014.

[0141] The processing circuit 4014 outputs an adjustment signal to the first reference voltage terminal G1 based on the signal output by the low-frequency ripple sampling circuit 4011 and the signal output by the voltage comparison circuit 4013, thereby adjusting the input voltage signal. This improves the stability of the voltage output and suppresses low-frequency ripple.

[0142] Specifically, the processing circuit 4014 can determine the first control signal based on the comparison result output by the voltage comparison circuit 4013. The first control signal is used to adjust the voltage signal input from the power supply 30 to the regulating device 40 so as to output the voltage signal through the output interface Out. The absolute value of the difference between the voltage signal and the target voltage signal is less than a preset threshold.

[0143] The processing circuit 4014 can determine the second adjustment signal based on the voltage deviation compensation signal output by the low-frequency ripple sampling circuit 4011. The second adjustment signal is fed back to the first reference voltage terminal G1 to compensate for the voltage deviation caused by the low-frequency ripple, thereby suppressing the low-frequency ripple.

[0144] In this embodiment, the stability of the voltage output and the suppression of low-frequency ripple are improved by adjusting the internal components of the regulating device 40, without the need to draw an analog signal to the power supply 30, thus having greater applicability.

[0145] Example 2: Based on the above embodiments, this embodiment also provides a power supply system, such as... Figure 8The diagram shows a structural schematic of another power supply system provided in this application embodiment. The power supply system 2 includes: multiple power sources 30 (including: power source 30-1, power source 30-2, ..., power source 30-N) and multiple regulating devices 40 (including: regulating device 40-1, regulating device 40-2, ..., regulating device 40-N), with each regulating device 40 corresponding to a power source 30.

[0146] The regulating device 40 and the power supply 30 are connected via a shielded cable. In this embodiment, the cable shielding effectively isolates external electromagnetic interference, preventing interference signals from intruding into the transmission link and superimposing them onto voltage or communication signals, thus ensuring the accuracy of signal transmission and providing a reliable original signal for ripple regulation and voltage control. Simultaneously, the shielding layer helps to isolate dust and moisture, extending the cable's lifespan and ensuring long-term stable signal and power transmission between the device and the power supply.

[0147] In some embodiments, the power supply system 2 further includes a control device 50.

[0148] The control device 50 is coupled to multiple regulating devices 40 and multiple power supplies 30. Specifically, the data transmission interface In2 of the regulating device 40 is coupled to the control device 50.

[0149] The control device 50 is used to communicate between each regulating device 40 and the corresponding power supply 30, specifically for communication between the voltage comparison circuit 4013 in the regulating device 40 and the power supply 30.

[0150] In this embodiment, the control device 50 can simultaneously detect the communication status between each power supply and its corresponding voltage comparison circuit, facilitating rapid location of communication faults related to voltage regulation and improving system maintenance efficiency. In this embodiment, the regulating device 40 and the power supply 30 are connected via a shielded cable, and the second reference voltage terminal of the power supply 30 is coupled to the shielding layer.

[0151] In this embodiment, coupling the shielding layer to the second reference voltage terminal allows the shielding layer to form a stable equipotential surface, which more effectively blocks external electromagnetic interference from entering the cable, avoids interference signals from affecting the transmitted signal through capacitive coupling between the shielding layer and the signal line, and improves the anti-interference effect.

[0152] Unlike the above embodiments, this application embodiment uses a control device 50 as the communication method between the regulating device 40 and the corresponding power supply 30.

[0153] The above-described preferred embodiments have further detailed the purpose, technical solution, and advantages of this utility model. It should be understood that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjusting device, characterized in that, include: A voltage input interface is provided for connection to a power supply to receive the voltage signal output by the power supply. An adjustment circuit, the input terminal of which is connected to the voltage input interface, is used to adjust the ripple of the voltage signal and / or the stability of the voltage signal; The output interface has an input terminal connected to the output terminal of the regulating circuit and an output terminal for connecting to a load. The output interface is used to output the regulated voltage signal. The voltage input interface and the output interface are disposed on the shielding box, and the adjustment circuit is disposed inside the shielding box; Wherein, when the adjustment circuit is used to adjust the ripple, the adjustment circuit includes a low-frequency ripple sampling circuit and / or a high-frequency ripple suppression circuit; where the adjustment circuit is used to adjust the stability, the adjustment circuit includes a voltage comparison circuit. The low-frequency ripple sampling circuit is used to sample the low-frequency ripple of the voltage signal to obtain a first sampling signal, so that the power supply adjusts the low-frequency ripple in response to the first sampling signal. The high-frequency ripple suppression circuit is used to suppress the high-frequency ripple of the voltage signal, and the frequency of the low-frequency ripple is less than the frequency of the high-frequency ripple. The voltage comparison circuit is used to determine a reference signal representing the difference between the voltage signal and the target voltage signal, so that the power supply adjusts the voltage signal in response to the reference signal so that the absolute value of the difference between the voltage signal and the target voltage signal is less than a preset threshold.

2. The adjusting device according to claim 1, characterized in that, In the case where the adjustment circuit includes a low-frequency ripple sampling circuit and a high-frequency ripple suppression circuit: The input terminal of the adjustment circuit is the input terminal of the low-frequency ripple sampling circuit, and the output terminal of the adjustment circuit is the output terminal of the high-frequency ripple suppression circuit. The output terminal of the low-frequency ripple sampling circuit is connected to the input terminal of the high-frequency ripple suppression circuit; or The input terminal of the adjustment circuit is the input terminal of the high-frequency ripple suppression circuit, and the output terminal of the adjustment circuit is the output terminal of the low-frequency ripple sampling circuit. The output terminal of the high-frequency ripple suppression circuit is connected to the input terminal of the low-frequency ripple sampling circuit.

3. The adjusting device according to claim 2, characterized in that, If the regulating circuit further includes the voltage comparison circuit, the input terminal of the voltage comparison circuit is connected to the output terminal of the regulating circuit.

4. The adjusting device according to claim 1, characterized in that, When the regulating circuit includes the voltage comparison circuit, the input terminal of the regulating circuit is the input terminal of the voltage comparison circuit, and the output terminal of the regulating circuit is connected to the input terminal of the voltage comparison circuit.

5. The adjusting device according to any one of claims 1-4, characterized in that, Also includes: A data transmission interface is provided on the shielding box and is used to connect to the communication interface of the power supply; The data transmission interface is used to connect to the sampling terminal of the low-frequency ripple sampling circuit, so that the low-frequency ripple sampling circuit feeds back the first sampling signal to the power supply via the data transmission interface. The data transmission interface is used to connect to the output terminal of the voltage comparison circuit, so that the voltage comparison circuit feeds back the reference signal to the power supply via the data transmission interface.

6. The adjusting device according to any one of claims 1-4, characterized in that, The voltage of the power supply is greater than or equal to 50 kV; and / or the power of the power supply is less than 50 watts.

7. The adjusting device according to claim 5, characterized in that, The low-frequency ripple sampling circuit includes: A capacitor voltage divider circuit includes a first capacitor, a second capacitor, and a third capacitor. The first terminal of the first capacitor is connected to the voltage input interface and also to the input terminal of the output interface. The second terminal of the first capacitor is connected to the first terminal of the second capacitor. The second terminal of the second capacitor is connected to a first reference voltage terminal. The first terminal of the third capacitor is connected to the second terminal of the first capacitor. The capacitor voltage divider circuit is used to extract low-frequency ripple from the voltage signal. The input terminal of the low-frequency ripple sampling circuit is the first terminal of the first capacitor. A first operational amplifier, the non-inverting input of which is connected to the second terminal of the third capacitor, and the inverting input of which is connected to the data transmission interface, is used to convert the low-frequency ripple in the voltage signal into the first sampling signal, so that the first sampling signal is fed back to the power supply via the data transmission interface. The output of the first operational amplifier is the sampling terminal of the low-frequency ripple sampling circuit.

8. The adjusting device according to claim 5, characterized in that, The high-frequency ripple suppression circuit is a low-pass filter. The input terminal of the low-pass filter is connected to the voltage input interface, and the output terminal of the low-pass filter is connected to the input terminal of the output interface.

9. The adjusting device according to claim 8, characterized in that, The low-pass filter includes a multi-stage resistor-capacitor filter.

10. The adjusting device according to claim 5, characterized in that, The voltage comparison circuit includes: A sampling circuit includes a first resistor, a second resistor, and a sampling terminal of the sampling circuit. A first terminal of the first resistor is connected to the input terminal of the output interface, a second terminal of the first resistor is connected to the first terminal of the second resistor, a second terminal of the second resistor is connected to a first reference voltage terminal, and the sampling terminal of the sampling circuit is connected to the second terminal of the first resistor. The sampling circuit is used to acquire the voltage signal to obtain a second sampled voltage signal, wherein the input terminal of the voltage comparison circuit is the first terminal of the first resistor. The second operational amplifier has its first input terminal connected to the sampling terminal of the sampling circuit, its second input terminal receiving the target voltage signal, and its output terminal connected to the data transmission interface. The second operational amplifier is used to convert the difference between the target voltage signal and the second sampled voltage signal into a reference signal, and output the reference signal to the power supply via the data transmission interface. The output terminal of the second operational amplifier is also the output terminal of the voltage comparison circuit.

11. A power supply system, characterized in that, include: Multiple power supplies; A plurality of regulating devices as described in any one of claims 1-10, wherein each of the plurality of regulating devices corresponds one-to-one with the plurality of power sources.

12. The power supply system according to claim 11, characterized in that, Also includes; A control device, coupled to the plurality of regulating devices and the plurality of power supplies, is used for communication between each regulating device and its corresponding power supply.

13. The power supply system according to claim 12, characterized in that, The control device is further configured to communicate between the voltage comparison circuit of each regulating device and the power supply corresponding to that regulating device.

14. The power supply system according to claim 11, characterized in that, Each regulating device is connected to its corresponding power source via a shielded cable.

15. The power supply system according to claim 14, characterized in that, The second reference voltage terminal of each power supply is coupled to the shielding layer.

Images