Filtering assembly, power supply module circuit, power supply module device and power supply system

Abstract

The utility model relates to the technical field of power supply filtering, in particular to a filtering assembly, a power supply module circuit, a power supply module device and a power supply system. According to the scheme, a plurality of capacitors on a filter circuit are integrated on at least one circuit board, and the circuit board is clamped between a first positive conductor and a first negative conductor along the thickness direction, so that the circuit board and a magnetic ring inserted on the first positive conductor and the first negative conductor are arranged adjacently; therefore, the filtering assembly which can attenuate a specific frequency band and output low ripples is formed. Therefore, the first positive conductor and the first negative conductor can be separated through the circuit board, short circuit caused by direct contact between the first positive conductor and the first negative conductor is avoided, the first positive conductor and the first negative conductor can be in direct contact with the front and back surfaces of the circuit board to realize electric connection, the loop is short, and the filter is suitable for filtering design in a low-voltage environment.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply filtering, in particular to a filtering component, a power module circuit, a power module device and a power supply system. Background Art

[0002] Ripple voltage will affect the operation of the system and bring noise, so the power supply should have sufficient filtering measures to limit the ripple within a certain amplitude. Multistage filtering is a commonly used electromagnetic interference filtering technology for reducing electromagnetic interference between electronic devices. It reduces interference signals in different frequency ranges by using multiple filter levels. For example, the power supply filtering circuit and the power supply filtering device provided in the patent document with the prior art publication number CN214228115U have a multistage filtering circuit connected across the power supply input end and the load power supply output end. Each stage of the filtering circuit includes an inductor module and a capacitor module connected in series; the specific circuit settings of the multistage filtering circuit can adjust the filtering level and parameters according to specific requirements to adapt to different environments and application scenarios, with high flexibility and adjustability. Correspondingly, designing a suitable layout structure to adapt to the circuit design can also give full play to the power supply parameter performance to a certain extent.

[0003] Specifically in this technical solution, the power supply filtering device sets two cavities in the base and a partition between the two cavities, and uses the two cavities to isolate the inductor module and the capacitor module in the N-stage filtering circuit (N is a positive integer greater than or equal to 1), avoiding the situation that the working of the capacitor module is affected due to the too high temperature of the inductor module when the power supply filtering device works, so as to achieve the purpose of heat dissipation and temperature reduction; but there are also the following problems:

[0004] In this scheme, the inductor module of each stage of the filtering circuit in the power supply filtering circuit is arranged in one of the cavities, and all the capacitor modules in the power supply filtering circuit are arranged on the same PCB board and arranged in the other cavity. The PCB board needs to be electrically connected to the first positive conductor connecting all the inductor modules through several second positive conductors penetrating the partition, and electrically connected to the first negative conductor connecting all the inductor modules through several second negative conductors penetrating the partition. Such a setting has problems of long circuit loop and large space occupation. Moreover, when it is necessary to adjust the number of filtering circuit stages or parameters, it is necessary to re-design the space occupation of the power supply filtering device and the layout of the PCB circuit, and the amount of transformation work is large. The device structure has poor adaptability to circuit adjustment. Especially when there are more components, the arrangement of the components needs to occupy a large PCB area, and correspondingly, it will also increase the volume of the power supply filtering device, resulting in poor environmental adaptability. Summary of the Utility Model

[0005] The object of the present utility model is to provide a low-ripple power supply device for solving the problems existing in the prior art power filter device, in which the inductance module and the capacitance module in the N-stage filter circuit are isolated by using two cavities, all the capacitance modules in the power filter circuit are arranged on the same PCB board and are respectively electrically connected to the first positive conductor and the second negative conductor passing through the partition board corresponding to the first positive conductor and the first negative conductor in series with all the inductance modules, resulting in a long circuit loop, large space occupation, and poor adaptability of the device to circuit adjustment.

[0006] In order to achieve the above object, the technical solution adopted by the present utility model is as follows:

[0007] A filtering component includes a first positive conductor and a first negative conductor, and the first positive conductor and the first negative conductor are arranged in parallel; it further includes:

[0008] At least one circuit board, which is clamped between the first positive conductor and the first negative conductor along the thickness direction, and a plurality of capacitors are arranged on the circuit board, and both ends of the capacitors are electrically connected to the first positive conductor and the first negative conductor respectively through the circuit board;

[0009] At least one magnetic ring, and the first positive conductor and the first negative conductor jointly pass through the magnetic ring;

[0010] The circuit board and the magnetic ring are arranged adjacent to each other on the output path.

[0011] In the filtering component of this solution, a plurality of capacitors on the filter circuit are integrally arranged on at least one circuit board, and the circuit board is clamped between the first positive conductor and the first negative conductor along the thickness direction, so that the circuit board and the magnetic ring inserted on the first positive conductor and the first negative conductor are arranged adjacent to each other, realizing attenuation of a specific frequency band and output of low ripple. In this way, not only can the first positive conductor and the first negative conductor be separated by the circuit board to avoid direct contact between the first positive conductor and the first negative conductor and generate a short circuit, but also the capacitors on the filter circuit can be in electrical connection with the first positive conductor and the first negative conductor through the front and back sides of the circuit board respectively, realizing a short loop and being suitable for the filter design in a low-voltage environment.

[0012] Moreover, the structural arrangement of this filtering component is more flexible, with high space utilization rate and good scene applicability. For example: the number of filter circuit stages can be adjusted by changing the number of circuit boards, or the total electrical parameters of a certain stage of filtering link can be changed by changing the number or capacitance specification of the capacitors in a certain circuit board to adapt to different scenarios, without having to redesign the entire circuit structure and layout design, with less re-design workload and good adaptability to circuit adjustment.

[0013] In an implementable mode of the present utility model, the positions of the circuit board and the magnetic ring arranged adjacent to each other on the output path can be interchanged. The circuit board is an output filter capacitor board, and the magnetic ring is a common-mode magnetic ring. At least two output filter capacitor boards are arranged in sequence to form a filter capacitor unit, and at least two common-mode magnetic rings are arranged in sequence to form a magnetic ring unit; the output filter capacitor board or the filter capacitor unit is arranged at intervals with the common-mode magnetic ring or the magnetic ring unit.

[0014] Specifically, the output filter capacitor board is arranged at intervals with the common-mode magnetic ring; or, the output filter capacitor board is arranged at intervals with the magnetic ring unit; or, the filter capacitor unit is arranged at intervals with the common-mode magnetic ring; or, the filter capacitor unit is arranged at intervals with the magnetic ring unit. It can also be: the common-mode magnetic ring is arranged at intervals with the output filter capacitor board; or, the magnetic ring unit is arranged at intervals with the output filter capacitor board; or, the common-mode magnetic ring is arranged at intervals with the filter capacitor unit; or, the magnetic ring unit is arranged at intervals with the filter capacitor unit.

[0015] A single output filter capacitor board or filter capacitor unit and a single common-mode magnetic ring or filter magnetic ring unit form a first-stage filter, and multiple output filter capacitor boards or filter capacitor units and multiple common-mode magnetic rings or filter magnetic ring units form a multi-stage filter.

[0016] Capacitors are mounted on one side or both sides of the output filter capacitor board. Busbars are arranged on the wide-side of the output filter capacitor board. The two ends of the capacitor are respectively electrically connected to the busbar, and the busbars are respectively electrically connected to the first positive conductor and the first negative conductor. Preferably, the output filter capacitor board is provided with copper foil, and the two ends of the capacitor are respectively electrically connected to the busbar through the copper foil.

[0017] As a preferred solution of the present utility model, the output filter capacitor board includes a first filter capacitor board, a second filter capacitor board, a third filter capacitor board, a fourth filter capacitor board, and a fifth filter capacitor board. The first filter capacitor board, the second filter capacitor board, the third filter capacitor board, the fourth filter capacitor board, and the fifth filter capacitor board are arranged at intervals in sequence from the power supply end to the load end;

[0018] The common-mode magnetic ring includes a first magnetic ring, a second magnetic ring, a third magnetic ring, and a fourth magnetic ring. The first magnetic ring and the second magnetic ring are arranged in sequence between the second filter capacitor board and the third filter capacitor board. The third magnetic ring is arranged between the third filter capacitor board and the fourth filter capacitor board. The fourth magnetic ring is arranged between the fourth filter capacitor board and the fifth filter capacitor board. For example, the first magnetic ring and the second magnetic ring can be used for common-mode attenuation in frequency bands above 100 kHz, and the third magnetic ring and the fourth magnetic ring are both used for attenuation in frequency bands of 100 kHz and below, aiming to achieve attenuation in multiple frequency bands.

[0019] In this solution, a plurality of output filter capacitor plates are clamped between the first positive electrode conductor and the first negative electrode conductor, and a common mode magnetic ring is arranged between two adjacent output filter capacitor plates in a linear shape to achieve attenuation in multiple frequency bands, having a good low-ripple output effect.

[0020] As a preferred solution of the present utility model, the above-mentioned filtering component further includes a grounding bar, the grounding bar is arranged parallel to the first positive electrode conductor or the first negative electrode conductor, the grounding bar is electrically connected to the circuit board through a grounding stud to prevent electromagnetic coupling interference and ensure the operation requirements of the circuit; the cross-section of the grounding bar is in an L shape, which is convenient for installation and fixation.

[0021] As a preferred solution of the present utility model, an insulating gasket is provided between the grounding bar and the first positive electrode conductor / the first negative electrode conductor to ensure the normal operation of the circuit; the grounding bar, the first positive electrode conductor, the circuit board and the first negative electrode conductor are fixedly connected through fixing bolts to ensure close fitting between the output filter capacitor plate and the grounding bar, the first positive electrode conductor, and the first negative electrode conductor. Correspondingly, the fixing bolts are in insulating contact with the grounding bar, the first positive electrode conductor, the circuit board and the first negative electrode conductor respectively. For example, an insulating cup is sleeved on the outer wall of the fixing bolt or the fixing bolt itself is made of an insulating material to prevent circuit short-circuit. The components in the filtering component are assembled together through fixing bolts, which is convenient for transportation, storage and reuse.

[0022] The present utility model also provides a power module circuit, including a power module, a bus filtering capacitor module, an H-bridge module, an inductor module and the above-mentioned filtering component;

[0023] The power module and the filtering component are grounded;

[0024] The bus filtering capacitor module is connected across the positive output terminal and the negative output terminal of the power module;

[0025] The H-bridge module is connected in parallel with the bus filtering capacitor module;

[0026] The H-bridge module, the inductor module and the filtering component are connected in sequence;

[0027] The H-bridge module includes a first half-bridge module and a second half-bridge module.

[0028] This solution is applicable to power supply designs that output high-precision, high-stability, and low-ripple current, with low ESR (equivalent series resistance of the loop) and low ESL (equivalent inductance of the loop).

[0029] The present utility model also provides a power module device, including a box body, the box body is provided with an inner cavity, and the above-mentioned power module circuit is arranged in the inner cavity;

[0030] The bus filter capacitor module in the power module circuit includes multiple electrolytic capacitors connected in parallel, and all the multiple electrolytic capacitors connected in parallel are arranged on the bus filter capacitor board;

[0031] A laminated busbar is provided in the inner cavity. The laminated busbar is electrically connected to the power module in the power module circuit, and the laminated busbar is electrically connected to the bus filter capacitor board;

[0032] The H-bridge module in the power module circuit is arranged on a PCB board, and the PCB board is electrically connected to the laminated busbar;

[0033] A second positive conductor and a second negative conductor are provided on the PCB board. The second positive conductor is electrically connected to the input end of the inductor module. The output end of the inductor module is connected to the power supply end of the first positive conductor in the filter component. The second negative conductor is electrically connected to the power supply end of the first negative conductor in the filter component. The load ends of the first positive conductor and the first negative conductor both extend out of the box body and serve as load connection terminals for connecting a load.

[0034] This solution integrates the above power module circuit, which is convenient for transportation and subsequent modular installation; in this device, the power supply is output to the bus filter capacitor module and the H-bridge module respectively in a laminated manner, and then output to the inductor module and the filter component in sequence through the H-bridge module; among them, the bus filter capacitor module can adopt multiple large-capacity low-ESR electrolytic capacitors connected in parallel, and the main purpose is to reduce low-frequency ripple and absorb part of the high-frequency ripple generated when the switching tubes work. This solution has convenient electrical connection, simple assembly, high space utilization rate, low impedance, anti-interference and good reliability.

[0035] As a preferred solution of the present invention, an RC absorption circuit is connected beside each switching tube on the PCB board for absorbing the voltage spike of the switching tube; the PCB board includes a first PCB substrate, a second PCB substrate and a third PCB substrate. The first PCB substrate and the second PCB substrate are arranged side by side on the same plane and are both located below the laminated busbar. The first PCB substrate and the second PCB substrate support the laminated busbar through several copper columns. The third PCB substrate is arranged above the laminated busbar, and the third PCB substrate is used to arrange the drive circuit of the H-bridge module. The laminated busbar supports the third PCB substrate through copper columns, with simple structure and high space utilization rate.

[0036] As a preferred solution of the present invention, the power module in the power module circuit adopts a switching power supply, and the switching power supply and the filter component are distributed on the left and right sides of the inner cavity; the laminated busbar, the H-bridge module and the inductor module are all arranged between the power module and the filter component, with simple structure and high space utilization rate.

[0037] The present utility model further provides a power supply system, which includes a multi-pulse transformer, a rectification module, an LC filtering module, and at least one of the above-mentioned power supply module circuits, and the multi-pulse transformer, the rectification module, the LC filtering module, and the power supply module circuit are connected in sequence; or:

[0038] It includes a multi-pulse transformer, a rectification module, an LC filtering module, and at least one of the above-mentioned power supply module devices, and the multi-pulse transformer, the rectification module, the LC filtering module, and the power supply module device are connected in sequence.

[0039] This solution is applicable to the power supply design that outputs high-precision, high-stability, and low-ripple current.

[0040] To sum up, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0041] 1. The structural design of the filtering component provided by the present utility model has the characteristics of short circuit loop, flexible structural arrangement, high space utilization rate, good scene applicability, and good adaptability to circuit regulation.

[0042] 2. The power supply module circuit and the power supply system adopting the filtering component provided by the present utility model are applicable to the power supply design that outputs high-precision, high-stability, and low-ripple current, and have low ESR and ESL.

[0043] 3. The power supply module device provided by the present utility model integrates a specific power supply module circuit, reserves load connection terminals, which is convenient for transportation and subsequent modular installation; moreover, in this solution, the power supply is output to each subsequent electrical module in a stacked manner, with convenient electrical connection, simple assembly, high space utilization rate, low impedance, anti-interference, and good reliability. Description of the Drawings

[0044] Figure 1 is the structural schematic diagram of a filtering component in Embodiment 1 Figure 1 ;

[0045] Figure 2 is the structural schematic diagram of a filtering component in Embodiment 1 Figure 2 ;

[0046] Figure 3 is the structural schematic diagram of a filtering component in Embodiment 1 Figure 3 ;

[0047] Figure 4 is the structural schematic diagram of a filtering component in Embodiment 1 Figure 4 ;

[0048] Figure 5 is the circuit diagram of a power supply module circuit in Embodiment 2;

[0049] Figure 6 is a schematic plan view of the power module device in Embodiment 3;

[0050] Figure 7 is Figure 6 a perspective view of;

[0051] Figure 8 is a schematic assembly view of the internal structure of the power module device in Embodiment 3;

[0052] Figure 9 is Figure 8 a structural exploded view of;

[0053] Figure 10 is a schematic circuit diagram of the power system in Embodiment 4, where the dashed box part in the figure corresponds to the power module circuit structure.

[0054] Icon: 1 - Filter component; 101 - First positive conductor; 102 - First negative conductor; 103 - Output filter capacitor board; 1031 - Safety capacitor; 104 - Common mode magnetic ring; 105 - Fixing bolt; 106 - Grounding bar; 107 - Insulating gasket; 108 - Grounding stud; 2 - Power module; 3 - Bus filter capacitor module; 4 - First half - bridge module; 5 - Second half - bridge module; 6 - Inductor module; 7 - First capacitor module; 8 - Second capacitor module; 9 - Box body; 10 - Stacked busbar; 11 - First PCB substrate; 12 - Second PCB substrate; 13 - Third PCB substrate; 14 - Second positive conductor; 15 - Second negative conductor. Detailed implementation manners

[0055] The following further describes the present utility model in detail with specific embodiments. However, this should not be construed as limiting the scope of the above - mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.

[0056] In the description of the specific embodiments of the present utility model, without special explanation, the expression terms of the orientation or positional relationship indicated by "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product / device / equipment is usually placed. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0057] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in directions such as "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8% of the error / deviation, more preferably within ±6% of the error / deviation, more preferably within ±5% of the error / deviation, more preferably within ±4% of the error / deviation. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.

[0058] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0059] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation exceeding 9.

[0060] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, when terms such as "set", "installed", "connected", "coupled", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, and can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0061] Embodiment 1

[0062] A filtering component 1, as Figures 1 - 4 shown, includes a first positive conductor 101 and a first negative conductor 102, and the first positive conductor 101 and the first negative conductor 102 are arranged in parallel; further includes:

[0063] At least one circuit board, the circuit board is clamped between the first positive conductor 101 and the first negative conductor 102 along the thickness direction, and a number of capacitors are arranged on the circuit board, and both ends of the capacitors are electrically connected to the first positive conductor 101 and the first negative conductor 102 respectively through the circuit board;

[0064] At least one magnetic ring, the first positive conductor 101 and the first negative conductor 102 pass through the magnetic ring together, and the magnetic ring is used to suppress the change of current by suppressing the change of magnetic field;

[0065] The circuit board and the magnetic ring are arranged adjacent to each other on the output path.

[0066] In the filtering component 1 of this solution, several capacitors on the filtering circuit are integrally arranged on at least one circuit board, and the circuit board is clamped between the first positive conductor 101 and the first negative conductor 102 in the thickness direction, so that the circuit board and the magnetic ring inserted on the first positive conductor 101 and the first negative conductor 102 are arranged at intervals, realizing attenuation of a specific frequency band and outputting low ripple. In this way, not only can the first positive conductor 101 and the first negative conductor 102 be separated by the circuit board to avoid short circuit caused by direct contact between the first positive conductor 101 and the first negative conductor 102, but also the capacitors on the filtering circuit can be in electrical connection with the first positive conductor 101 and the first negative conductor 102 respectively through the front and back sides of the circuit board, realizing a short circuit, with small loop loss and being suitable for the filtering design of a low-voltage environment. Among them, the positions of the circuit board and the magnetic ring arranged adjacent to each other on the output path can be interchanged according to needs.

[0067] The structural arrangement of this filtering component 1 is more flexible, with high space utilization rate and good scene applicability. For example: the number of stages of the filtering circuit can be adjusted by changing the number of circuit boards, or the total electrical parameters of a certain filtering link can be changed by changing the number or capacitance specification of the capacitors in a certain circuit board, so as to adapt to different scenarios, without having to redesign the entire circuit structure and layout design, with less workload for redesign and good adaptability to circuit adjustment.

[0068] Specifically, in this embodiment, the first positive electrode conductor 101 uses a positive electrode copper bar. The two ends of the positive electrode copper bar are respectively used as the positive electrode of the power input end and the positive electrode of the load power output end, and are respectively used to connect to the positive electrode of the power supply and the positive electrode of the load end; the first negative electrode conductor 102 uses a negative electrode copper bar. The two ends of the negative electrode copper bar are respectively used as the negative electrode of the power input end and the negative electrode of the load power output end, and are respectively used to connect to the negative electrode of the power supply and the negative electrode of the load end; the first positive electrode conductor 101 and the first negative electrode conductor 102 are fixedly connected by a fixing bolt 105. The fixing bolt 105 is provided to ensure that the circuit board fits with the positive and negative copper bars to fix the circuit board. Insulation is provided between the fixing bolt 105 and the first positive electrode conductor 101, and between the fixing bolt 105 and the first negative electrode conductor 102. The circuit board is an output filter capacitor board 103, and the magnetic ring is a common mode magnetic ring 104. The single output filter capacitor board 103 and the single common mode magnetic ring 104 can be arranged at intervals, or at least two sequentially arranged output filter capacitor boards 103 can be formed into a filter capacitor unit, at least two sequentially arranged common mode magnetic rings can be formed into a magnetic ring unit, and the filter capacitor unit and the magnetic ring unit can be arranged at intervals, or the filter capacitor unit and a single common mode magnetic ring can be arranged at intervals, or the single output filter capacitor board 103 and the magnetic ring unit can be arranged at intervals. Capacitors are mounted on one side or both sides of the output filter capacitor board 103. Busbars are provided on the wide side of the output filter capacitor board 103. The output filter capacitor board is provided with copper foil. Both ends of the capacitor are electrically connected to the busbar through the copper foil, and the busbars are respectively electrically connected to the first positive electrode conductor 101 and the first negative electrode conductor 102.

[0069] In this embodiment, by way of example, the number of output filter capacitor boards 103 is five, namely the first filter capacitor board, the second filter capacitor board, the third filter capacitor board, the fourth filter capacitor board and the fifth filter capacitor board. The first filter capacitor board, the second filter capacitor board, the third filter capacitor board, the fourth filter capacitor board and the fifth filter capacitor board are arranged at intervals in sequence from the power supply end to the load end. The first filter capacitor board, the second filter capacitor board, the third filter capacitor board, the fourth filter capacitor board and the fifth filter capacitor board are arranged in an L shape and the first filter capacitor board and the second filter capacitor board are vertically arranged; correspondingly, in this embodiment, the common mode magnetic ring 104 includes a first magnetic ring, a second magnetic ring, a third magnetic ring and a fourth magnetic ring. The first magnetic ring and the second magnetic ring form a magnetic ring unit and are sequentially arranged between the second filter capacitor board and the third filter capacitor board. The third magnetic ring is arranged between the third filter capacitor board and the fourth filter capacitor board. The fourth magnetic ring is arranged between the fourth filter capacitor board and the fifth filter capacitor board. Among them, the first magnetic ring and the second magnetic ring are used for common mode attenuation in frequency bands above 100 kHz, and the third magnetic ring and the fourth magnetic ring are both used for attenuation in frequency bands of 100 kHz and below, aiming to achieve attenuation in multiple frequency bands. The inner diameter size of the magnetic ring is preferably close to that of the two-stage copper bar to prevent leakage. The number and arrangement of the circuit board and the magnetic ring are not limited to the above examples.

[0070] By clamping and arranging a plurality of output filter capacitor plates 103 between the first positive electrode conductor 101 and the first negative electrode conductor 102, and making a turning design between two adjacent capacitor plates among the plurality of output filter capacitor plates 103, the plurality of output filter capacitor plates 103 are integrally arranged in an L shape, which is beneficial to reducing the overall structural length of the component, improving the space utilization rate, facilitating adaptation to the arrangement of other device modules, and thus reducing the connection loop; this solution uses the turning design to isolate the electromagnetic interference between adjacent two capacitor plates, and a common mode choke 104 is arranged between two adjacent output filter capacitor plates 103 arranged linearly continuously to achieve attenuation in multiple frequency bands, having a better low ripple output effect.

[0071] In this embodiment, in order to make both ends of the positive and negative copper bars adapt to the wiring habit of positive on the left and negative on the right (viewing from the opening direction facing the wiring terminal), both the first positive electrode conductor 101 and the first negative electrode conductor 102 adopt two-section copper bars and are misaligned and spliced at the interval of the L-shaped turning.

[0072] Furthermore, the above-mentioned filter component 1 further includes a grounding bar 106, and the grounding bar 106 is arranged in parallel with the first positive electrode conductor 101 or the first negative electrode conductor 102. In this embodiment, the grounding bar 106 is preferably arranged on the side of the first negative electrode conductor 102 facing away from the output filter capacitor plate 103. The grounding bar 106 is electrically connected to the output filter capacitor plate 103 at the corresponding position through a plurality of grounding studs 108 to prevent electromagnetic coupling interference and ensure the working requirements of the circuit; in this embodiment, the cross-section of the grounding bar 106 is in an L shape, and the bottom of the grounding bar 106 is provided with mounting holes. In this embodiment, it is preferably to realize the overall installation and fixation of the filter component 1 through the grounding bar 106; the planar shape of the grounding bar 106 is also in an L shape, which is adapted to the arrangement of the L-shaped output filter capacitor plate 103. Correspondingly, an insulating gasket 107 is provided between the grounding bar 106 and the first negative electrode conductor 102 to isolate the grounding bar 106 and the first negative electrode conductor 102 and ensure the normal operation of the circuit.

[0073] Furthermore, in this embodiment, the grounding bar 106, the first positive electrode conductor 101, the output filter capacitor plate 103 and the first negative electrode conductor 102 are fixedly connected through fixing bolts 105 to ensure close fitting between the output filter capacitor plate 103 and the grounding bar 106, the first positive electrode conductor 101, and the first negative electrode conductor 102; correspondingly, an insulating cup is sleeved on the outer wall of the fixing bolt 105 to prevent electrical conduction between the first negative electrode conductor 102, the first negative electrode conductor 102 and the grounding bar 106.

[0074] In this embodiment, on each output filter capacitor board 103, a number of chip ceramic capacitors are connected in parallel, which can minimize the equivalent series resistance (ESR) and equivalent series inductance (ESL) of the filter capacitor, resulting in a better low-ripple output effect. Additionally, two safety capacitors (positive electrode to ground, negative electrode to ground) 1031 are provided and grounded.

[0075] The filter component 1 provided in this embodiment is applicable to power supply filter designs with low ESR and ESL and low ripple, and is suitable for low-voltage environments below 1000V, especially for low-voltage environments below 100V, having outstanding advantages compared to the technical solution of the prior art with the publication number CN214228115U.

[0076] Embodiment 2

[0077] Based on Embodiment 1, this embodiment further provides a power module circuit, as Figure 5 shown, including a power module 2, a bus filter capacitor module 3, an H-bridge module, an inductor module 6, and the above-mentioned filter component 1; wherein:

[0078] The power module 2 and the filter component 1 are grounded;

[0079] The bus filter capacitor module 3 is connected across the positive output terminal and the negative output terminal of the power module 2;

[0080] The H-bridge module is connected in parallel with the bus filter capacitor module 3;

[0081] The H-bridge module, the inductor module 6, and the filter component 1 are connected in sequence;

[0082] The H-bridge module includes a first half-bridge module 4 and a second half-bridge module 5.

[0083] The bus filter capacitor module 3 can be formed by connecting multiple large-capacity electrolytic capacitors with low ESR in parallel, mainly for reducing low-frequency ripple and absorbing part of the high-frequency ripple generated during the operation of some switching tubes. The power module 2 uses a Mean Well commercial switching power supply, which supports AC / DC power supply and has good applicability.

[0084] Furthermore, an absorption capacitor module is included. The absorption capacitor module is connected to the H-bridge module and is used to absorb the voltage spikes of the switching tubes in the H-bridge module. The absorption capacitor module preferably uses chip ceramic capacitors (with a large number and low ESR) and is correspondingly arranged on the absorption capacitor board. Specifically, in this embodiment, the H-bridge adopts a dual half-bridge method, and the absorption capacitor module correspondingly includes a first capacitor module 7 and a second capacitor module 8. The first half-bridge module 4 is electrically connected to the first capacitor module 7, and the second half-bridge module 5 is electrically connected to the second capacitor module 8.

[0085] This solution is applicable to power supply designs with high-precision, high-stability, and low-ripple current output, with low ESR and ESL.

[0086] Embodiment 3

[0087] Based on Embodiment 2, this embodiment further provides a power module device, as Figures 6 - 9 shown, which includes a box body 9. The box body 9 is provided with an inner cavity. An above-mentioned power module circuit is arranged in the inner cavity. A laminated busbar 10 is also arranged in the inner cavity. The laminated busbar 10 is electrically connected to the power module 2, and the laminated busbar 10 is electrically connected to the busbar filter capacitor module 3 in the above-mentioned power module circuit. After the switching power supply outputs, it is output to the busbar filter capacitor module 3 and the H-bridge module in a laminated manner. Specifically, the busbar filter capacitor module 3 is integrally arranged on a busbar filter capacitor board, the H-bridge module is arranged on a PCB board, and both the busbar filter capacitor board and the PCB board are electrically connected to the laminated busbar 10.

[0088] The PCB board is provided with a second positive conductor 14 and a second negative conductor 15. The second positive conductor 14 is electrically connected to the input end of the inductor module 6. The output end of the inductor module 6 is connected to the power supply end of the first positive conductor 101 in the filter component 1. The second negative conductor 15 is electrically connected to the power supply end of the first negative conductor 102 in the filter component 1. The load ends of the first positive conductor 101 and the first negative conductor 102 both extend out of the box body 9 and serve as load connection terminals for connecting a load. The second positive conductor 14 is preferably a positive copper bar, and the second negative conductor 15 is preferably a negative copper bar; the second positive conductor 14 and the second negative conductor 15 are respectively electrically connected to the PCB board. The second positive conductor 14 serves as the positive output end of the H-bridge module on the PCB board, and the second negative conductor 15 serves as the negative output end of the H-bridge module on the PCB board.

[0089] This solution integrates the above-mentioned power module circuit, which is convenient for transportation and subsequent modular installation, has convenient electrical connection, simple assembly, high space utilization rate, low impedance, anti-interference, and good reliability.

[0090] Furthermore, an RC absorption circuit is connected beside each switching tube on the PCB board for absorbing the voltage spike of the switching tube; the PCB board includes a first PCB substrate 11, a second PCB substrate 12, and a third PCB substrate 13. The first PCB substrate 11 and the second PCB substrate 12 are arranged side by side on the same plane and are both located below the laminated busbar 10. The first PCB substrate 11 and the second PCB substrate 12 support the laminated busbar 10 through a plurality of copper columns. The third PCB substrate 13 is arranged above the laminated busbar 10. The laminated busbar 10 supports the third PCB substrate 13 through copper columns. The first PCB substrate 11 is used to arrange the first half-bridge module 4, the second PCB substrate 12 is used to arrange the second half-bridge module 5, and the third PCB substrate 13 is used to arrange the drive circuit of the H-bridge module, with a simple structure and high space utilization rate.

[0091] The absorption capacitor plates include a first absorption capacitor plate and a second absorption capacitor plate. The first capacitor module 7 is disposed on the first absorption capacitor plate, and the second capacitor module 8 is disposed on the second absorption capacitor plate. The absorption capacitor plates are all surface-mounted ceramic capacitors (with a large number and low ESR). The positive and negative electrodes of the first absorption capacitor plate and the second absorption capacitor plate are both electrically connected to the laminated busbar 10. The first absorption capacitor plate and the second absorption capacitor plate are disposed between the laminated busbar 10 and the third PCB substrate 13 through copper posts. The first absorption capacitor plate and the second absorption capacitor plate are arranged side by side in the horizontal direction and are respectively vertically corresponding to the positions of the first PCB substrate 11 and the second PCB substrate 12, for absorbing the voltage spikes of the switching tubes on the H-bridge module, reducing the output switching noise caused by the influence of the voltage spikes of the switching tubes on the H-bridge, reducing the difficulty of ripple control, and adapting to the situation where both the load resistance and the inductance are very small.

[0092] Further, the power supply module 2 in the power supply module circuit adopts a switching power supply. The switching power supply and the filtering component 1 are distributed on the left and right sides of the inner cavity; the laminated busbar 10, the H-bridge module, and the inductor module 6 are all arranged between the power supply module 2 and the filtering component 1, and the busbar filtering capacitor plate and the power supply module 2 are located on the front and rear sides of the laminated busbar 10, with a simple structure and high space utilization rate.

[0093] Embodiment 4

[0094] The vertical cutting magnet power supply is a high-stability and low-ripple static power supply, which is an important device for supplying power to the vertical cutting magnet in the hard X-ray free electron laser device (SHINE). The load parameters of the vertical cutting magnet power supply of the hard X-ray free electron laser device are as follows: the required output current range is -100A to 1100A, and at the same time, the output current is required to be continuously adjustable; the accuracy of the power supply output current is better than 0.001%; when the output current is at 10% to 100% of the rated value, the short-term (three minutes) stability is less than 10ppm (peak-peak), and at the same time, the 8-hour stability is less than 50ppm (peak-peak); the output current ripple is less than 40ppm.

[0095] In the existing vertical cutting magnet power supply, the accuracy and stability of the power supply output current cannot meet the requirements. Therefore, to meet the technical requirements, based on Embodiment 2 or Embodiment 3, this embodiment provides a power supply system, as Figure 10 shown, including a multi-pulse transformer, a rectification module, an LC filtering module, and at least one of the above-mentioned power supply module circuits, and the multi-pulse transformer, the rectification module, the LC filtering module, and the power supply module circuit are connected in sequence; or, the power supply system includes a multi-pulse transformer, a rectification module, an LC filtering module, and at least one of the above-mentioned power supply module devices, and the multi-pulse transformer, the rectification module, the LC filtering module, and the power supply module circuit are connected in sequence.

[0096] In this embodiment, the topology of the power supply system preferably adopts a front-stage rectifier + LC filter + commercial switch power supply + capacitor filter + H-bridge + inductor + multi-stage filtering device. Among them, the commercial switch power supply + capacitor filter + H-bridge + inductor + multi-stage filtering device is made into a device, that is, set as the power module device in Embodiment 3. The power supply system uses 6 power module devices in parallel output. The pulses adopt a phase-shifting method to reduce the ripple. At the same time, the H-bridge adopts a phase-shifted pulse method to achieve frequency doubling.

[0097] To achieve low output ripple, in this embodiment, the power module 2 in the front stage of the H-bridge module adopts a Mean Well commercial switch power supply. When powered by AC, the measured power frequency ripple of this power supply output is about 6 mV. Referring to the power supply specification, this switch power supply supports AC / DC power supply. Therefore, a 24-pulse transformer (380:4*220) is added to the power supply inlet line, and 4 groups of rectifier bridges are connected. Then the power frequency ripple is equivalent to changing from 50 Hz to 600 Hz. After that, it is connected to a group of LC filters and then supplies power to each device. After testing, the power frequency ripple of the switch power supply drops from 50 Hz / 6 mV to 600 Hz / 1 mV.

[0098] After the output of the switch power supply, it is output to the bus filter capacitor module 3 and the H-bridge module in a stacked manner. This bus filter capacitor module 3 uses multiple large-capacity low-ESR electrolytic capacitors in parallel. The main purpose is to reduce the low-frequency ripple and absorb part of the high-frequency ripple generated when the switching tubes work.

[0099] Because both the load resistance and inductance are very small, the output switching noise will be caused by the voltage spike of the switching tubes on the H-bridge, resulting in difficulties in the ripple index. Therefore, on the stack, the positive and negative poles are supported by copper posts to absorb the capacitor plates, and the capacitor plates are all surface-mounted ceramic capacitors (with a large number and low ESR) to absorb the voltage spike of the switching tubes.

[0100] The H-bridge adopts a double-pin half-bridge method. The PCB substrate uses a copper substrate. The copper substrate places the absorption capacitor on the copper substrate through a thermoelectric separation technology, minimizing the path from the bus to both sides of the capacitor. At the same time, an RC absorption circuit is placed beside each switching tube on the copper substrate to absorb the voltage spike of the switching tubes.

[0101] At the same time, a filter inductor + the filter component 1 in Embodiment 1 is connected to the output end of the H-bridge to achieve multi-stage filtering, with a small loop, low ESR and ESL. Using the above power supply system can meet the current technical requirements of low output ripple, high stability and high precision.

[0102] It should be noted that in the above Embodiment 1 - Embodiment 4, the output filter capacitor plates 103, absorption capacitor plates, bus filter capacitor plates and other plates are essentially PCB circuit boards, which can conduct electricity through the conductive layer. Their manufacturing processes are mature technologies in the prior art, and their circuit layout methods and shapes can be customized according to actual needs, and will not be elaborated here.

[0103] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A filtering component (1), characterized in that, It includes a first positive electrode conductor (101) and a first negative electrode conductor (102), and the first positive electrode conductor (101) and the first negative electrode conductor (102) are arranged in parallel; it further includes: At least one circuit board, which is clamped between the first positive electrode conductor (101) and the first negative electrode conductor (102) along the thickness direction. A number of capacitors are provided on the circuit board, and both ends of the capacitor are electrically connected to the first positive electrode conductor (101) and the first negative electrode conductor (102) respectively through the circuit board; At least one magnetic ring, and the first positive electrode conductor (101) and the first negative electrode conductor (102) pass through the magnetic ring (104); The circuit board and the magnetic ring are arranged adjacent to each other on the output path.

2. A filtering component (1) according to claim 1, characterized in that, The positions of the circuit board and the magnetic ring arranged adjacent to each other on the output path can be interchanged. The circuit board is an output filter capacitor board (103), and the magnetic ring is a common mode magnetic ring (104). At least two output filter capacitor boards (103) are arranged in sequence to form a filter capacitor unit, and at least two common mode magnetic rings (104) are arranged in sequence to form a magnetic ring unit; the output filter capacitor board (103) or the filter capacitor unit and the common mode magnetic ring (104) or the magnetic ring unit are arranged at intervals.

3. A filtering component (1) according to claim 2, characterized in that, Capacitors are mounted on one side or both sides of the output filter capacitor board (103). Busbars are provided on the wide side of the output filter capacitor board (103). Both ends of the capacitor are electrically connected to the busbar respectively, and the busbars are electrically connected to the first positive electrode conductor (101) and the first negative electrode conductor (102) respectively.

4. A filtering component (1) according to claim 2, characterized in that, The output filter capacitor board (103) includes a first filter capacitor board, a second filter capacitor board, a third filter capacitor board, a fourth filter capacitor board and a fifth filter capacitor board, and the first filter capacitor board, the second filter capacitor board, the third filter capacitor board, the fourth filter capacitor board and the fifth filter capacitor board are arranged at intervals in sequence from the power supply end to the load end; The common mode magnetic ring (104) includes a first magnetic ring, a second magnetic ring, a third magnetic ring and a fourth magnetic ring. The first magnetic ring and the second magnetic ring are arranged in sequence between the second filter capacitor board and the third filter capacitor board, the third magnetic ring is arranged between the third filter capacitor board and the fourth filter capacitor board, and the fourth magnetic ring is arranged between the fourth filter capacitor board and the fifth filter capacitor board.

5. A filter component (1) according to any one of claims 1-4, further includes a grounding bar (106), the grounding bar (106) is arranged parallel to the first positive electrode conductor (101) or the first negative electrode conductor (102), and the grounding bar (106) is electrically connected to the circuit board through a grounding stud (108); the cross section of the grounding bar (106) is L-shaped; An insulating gasket (107) is provided between the grounding bar (106) and the first positive conductor (101) / the first negative conductor (102); the grounding bar (106), the first positive conductor (101), the circuit board, and the first negative conductor (102) are fixedly connected by fixing bolts (105), and the fixing bolts (105) are in insulating contact with the grounding bar (106), the first positive conductor (101), the circuit board, and the first negative conductor (102) respectively.

6. A power module circuit, characterized in that, It includes a power module (2), a bus filter capacitor module (3), an H-bridge module, an inductor module (6), and the filter component (1) according to any one of claims 1-5; The power module (2) and the filter component (1) are grounded; The bus filter capacitor module (3) is connected across the positive output terminal and the negative output terminal of the power module (2); The H-bridge module is connected in parallel with the bus filter capacitor module (3); The H-bridge module, the inductor module (6), and the filter component (1) are connected in sequence; The H-bridge module includes a first half-bridge module (4) and a second half-bridge module (5).

7. A power module device, characterized in that, It includes a box body (9), the box body (9) is provided with an inner cavity, and the power module circuit according to claim 6 is arranged in the inner cavity; The bus filter capacitor module (3) in the power module circuit includes a plurality of electrolytic capacitors connected in parallel, and the plurality of electrolytic capacitors connected in parallel are all arranged on a bus filter capacitor board; A laminated bus bar (10) is provided in the inner cavity, the laminated bus bar (10) is electrically connected to the power module (2) in the power module circuit, and the laminated bus bar (10) is electrically connected to the bus filter capacitor board; The H-bridge module in the power module circuit is arranged on a PCB board, and the PCB board is electrically connected to the laminated bus bar (10); The PCB board is provided with a second positive conductor (14) and a second negative conductor (15), the second positive conductor (14) is electrically connected to the input end of the inductor module (6), the output end of the inductor module (6) is connected to the power supply end of the first positive conductor (101) in the filter component (1), the second negative conductor (15) is electrically connected to the power supply end of the first negative conductor (102) in the filter component (1), and the load ends of the first positive conductor (101) and the first negative conductor (102) both extend out of the box body (9).

8. According to the power module device of claim 7, an RC absorption circuit is connected beside each switching tube on the PCB board; The PCB board includes a first PCB substrate (11), a second PCB substrate (12) and a third PCB substrate (13). The first PCB substrate (11) and the second PCB substrate (12) are arranged side by side in the same plane and are both located below the stacked busbar (10). The first PCB substrate (11) and the second PCB substrate (12) support the stacked busbar (10) through a plurality of copper posts. The third PCB substrate (13) is arranged above the stacked busbar (10). The third PCB substrate (13) is used to arrange the drive circuit of the H-bridge module. The stacked busbar (10) supports the third PCB substrate (13) through copper posts.

9. For a power module device according to claim 7 or 8, the power module (2) in the power module circuit uses a switching power supply. The switching power supply and the filtering component (1) are distributed on the left and right sides of the inner cavity; the stacked busbar (10), the H-bridge module and the inductor module (6) are all arranged between the power module (2) and the filtering component (1).

10. A power supply system, characterized in that, It includes a multi-pulse transformer, a rectification module, an LC filtering module and at least one power module circuit according to claim 6. The multi-pulse transformer, the rectification module, the LC filtering module and the power module circuit are connected in sequence; Or: It includes a multi-pulse transformer, a rectification module, an LC filtering module and at least one power module device according to any one of claims 7-9. The multi-pulse transformer, the rectification module, the LC filtering module and the power module device are connected in sequence.

Images