A dc circuit adding interference device based on a magnetic bias transformer
Patent Information
- Application Number
- CN202521684112.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-08-07
AI Technical Summary
[0003]现有的测试技术只有电流互感器或电压互感器，或是示波器等仪器设备可以单纯从电网上取得一些干扰信号，但这些对目前的测试技术这种应用来说并不完整，特别是需再向直流电路中加入很强的交流信号基本上无法做到
[0020]本实用新型与现有技术相比具有明显的优点和有益效果，具体而言，由上述技术方案可知，其主要是通过偏磁变压器和交流信号发生器的结合设计，并使偏磁变压器包括上夹件散热板、下夹件散热板、磁芯和绕组，绕组包括第一绕组和第二绕组，第一绕组上设置第一输入脚和第四输入脚，第二绕组上设置第二输入脚和第三输入脚，使第一输入脚、第二输入脚为初级侧，第三输入脚、第四输入脚为次级侧，并使第一输入脚、第二输入脚用于串联于直流电路，第三输入脚、第四输入脚与交流信号发生器相连接，如此，工作时，交流信号发生器产生交流信号，将交流信号加入至次级侧的第三输入脚、第四输入脚，初级侧产生干扰交流信号并将该干扰交流信号由第一输入脚、第二输入脚加入至直流电路中，这样，可使其能够将干扰交流信号强行注入直流电路中，起到干扰的作用，从而在其应用于测试时能够在直流电路中加入强的交流信号，以满足用户的测试需求，且加入的交流信号其频率和幅度值均可根据测试需求进行任意调整；
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Figure CN224788848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of DC circuit interference testing technology, and in particular to a DC circuit interference adding device based on a biased magnetic transformer. Background Technology
[0002] In large UPS applications and PSW inverter environments, the current from the energy storage battery is sometimes converted from DC to AC, and sometimes from AC to DC for storage in the battery. Because the operation of this circuit can generate significant interference signals in our overall power grid, it is necessary to perform interference testing on the circuit.
[0003] Existing testing technologies only have current transformers or voltage transformers, or instruments and equipment such as oscilloscopes, which can simply obtain some interference signals from the power grid. However, these are not complete for this application of current testing technologies, especially since it is basically impossible to add a strong AC signal to the DC circuit.
[0004] Therefore, in this utility model, the applicant has carefully researched a new technical solution to solve the above problems. Utility Model Content
[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a DC circuit interference device based on a biased magnetic transformer, which can inject AC signals into the DC circuit to play an interference role.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A DC circuit interference device based on a biased magnet transformer includes a biased magnet transformer and an AC signal generator;
[0008] The biased magnetic transformer includes an upper clamp heat sink, a lower clamp heat sink, a magnetic core, and windings;
[0009] The magnetic core is sandwiched between the upper clamp heat sink plate and the lower clamp heat sink plate. The magnetic core has two winding posts arranged with a left-right spacing. The winding includes a first winding and a second winding, and the first winding and the second winding are respectively wound on the two winding posts.
[0010] The first winding is provided with a first input pin and a fourth input pin, and the second winding is provided with a second input pin and a third input pin; the first input pin and the second input pin are the primary side, and the third input pin and the fourth input pin are the secondary side; the first input pin and the second input pin are connected in series with a DC circuit, and the third input pin and the fourth input pin are connected to an AC signal generator.
[0011] As a preferred solution, the magnetic core is a silicon-iron magnetic core, and the silicon-iron magnetic core is a structure formed by splicing a plurality of silicon-iron magnetic blocks.
[0012] As a preferred solution, the winding posts comprise a first winding post and a second winding post; after being spliced, the silicon-iron magnetic core forms a square-shaped structure, the first winding post is arranged on the left side, the second winding post is arranged on the right side, the first winding is wound outside the first winding post, and the second winding is wound outside the second winding post.
[0013] As a preferred solution, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are respectively located at the upper end and the lower end of the magnetic core, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are arranged vertically symmetrically, and the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are connected by a plurality of counter-pull bolts; by tightening the plurality of counter-pull bolts, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate provide clamping restraining force to the magnetic core, so as to realize assembly and fixation.
[0014] As a preferred solution, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are respectively provided with an upper insertion part and a lower insertion part, and the upper insertion part and the lower insertion part are oppositely inserted into the magnetic core.
[0015] As a preferred solution, a plurality of heat dissipation holes spaced sequentially in the left-right direction are arranged in the middle of each of the upper clamping heat dissipation plate and the lower clamping heat dissipation plate, the heat dissipation holes penetrate through the upper and lower sides of the corresponding clamping heat dissipation plate, the upper insertion part and the lower insertion part are respectively provided with an upper through slot and a lower through slot, the upper through slot communicates with the lower through slot, and one of the heat dissipation holes communicates with the through slot of the corresponding insertion part.
[0016] As a preferred solution, brackets are arranged on the left and right sides of the lower end of the lower clamping heat dissipation plate, and the lower ends of the plurality of counter-pull bolts pass through the lower clamping heat dissipation plate and are locked and fixed on the corresponding brackets by nuts.
[0017] As a preferred solution, hollow slots extending in the left-right direction are arranged on the front and rear sides of each of the upper clamping heat dissipation plate and the lower clamping heat dissipation plate, and the hollow slots penetrate through the upper and lower sides of the corresponding clamping heat dissipation plate.
[0018] As a preferred solution, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are made of aluminum alloy.
[0019] As a preferred solution, the frequency of the interference AC signal is 500Hz-5kHz.
[0020] This utility model has significant advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly combines a biasing transformer and an AC signal generator. The biasing transformer includes an upper clamp heat sink, a lower clamp heat sink, a magnetic core, and windings. The windings include a first winding and a second winding. The first winding is provided with a first input pin and a fourth input pin, and the second winding is provided with a second input pin and a third input pin. The first and second input pins are the primary side, and the third and fourth input pins are the secondary side. The first and second input pins are connected in series in a DC circuit, and the third input pin is connected in series in a DC circuit. The first and fourth input pins are connected to the AC signal generator. During operation, the AC signal generator generates an AC signal and adds it to the third and fourth input pins on the secondary side. The primary side generates an interfering AC signal and adds it to the DC circuit through the first and second input pins. This allows the interfering AC signal to be forcibly injected into the DC circuit, thus interfering with the DC circuit. When used for testing, a strong AC signal can be added to the DC circuit to meet the user's testing requirements. The frequency and amplitude of the added AC signal can be adjusted arbitrarily according to the testing requirements.
[0021] Furthermore, by designing the magnetic core as an iron-silicon core, which is a structure formed by splicing together several iron-silicon magnetic blocks, the iron-silicon magnetic blocks have good DC superposition capabilities, so they can be applied in DC circuits and are suitable for high-frequency applications. In addition, by making the upper and lower clamping heat sinks made of aluminum alloy, better heat dissipation can be achieved. Several heat dissipation holes are provided in the middle of the upper and lower clamping heat sinks. The upper and lower insertion parts have upper and lower through slots, respectively, which are connected to each other. One of the heat dissipation holes is connected to the through slot of the corresponding insertion part. In this way, the combination of heat dissipation holes, upper through slots, and lower through slots creates a heat dissipation channel within the magnetic core. The air channel and the aluminum alloy clamping heat sink are integrally formed, which can achieve better heat dissipation effect.
[0022] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural schematic diagram of a biased magnet transformer according to an embodiment of the present utility model;
[0024] Figure 2 This is a three-dimensional structural schematic diagram of the biased magnet transformer according to another embodiment of the present utility model;
[0025] Figure 3 This is a cross-sectional schematic diagram of a biased magnetizing transformer according to an embodiment of the present invention;
[0026] Figure 4 This is an exploded view of the biased magnet transformer according to an embodiment of the present invention;
[0027] Figure 5 This is a partially exploded structural diagram of the bias magnet transformer according to an embodiment of the present invention;
[0028] Figure 6 This is a schematic diagram of the magnetic core of the bias transformer according to an embodiment of the present invention;
[0029] Figure 7 This is a schematic diagram of an embodiment of the present invention applied to a DC circuit.
[0030] Explanation of reference numerals in the attached diagram:
[0031] 10. Upper clamp heat sink plate; 11. Upper insertion part
[0032] 111. Upper through slot 20. Lower clamp heat sink plate
[0033] 21. Lower insertion part 211. Lower through groove
[0034] 30. Magnetic core; 31. Ferrosilicon magnetic block
[0035] 32. First revolution around the pillar 33. Second revolution around the pillar
[0036] 40. First winding; 41. First input pin
[0037] 42. Fourth input pin; 50. Second winding
[0038] 51. Second input pin 52. Third input pin
[0039] 60. Tie bolts; 70. Brackets
[0040] 80. Heat dissipation holes; 90. Empty slots
[0041] 101. Upper partition; 102. Lower partition
[0042] 201. Battery pack; 202. Inverter system
[0043] 203. Load system. Detailed Implementation
[0044] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0045] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of an embodiment of this utility model, which is mainly used, but not limited to, for testing the power output quality and system stability of energy storage stations.
[0046] An interference device for a DC circuit based on a biased magnet transformer includes a biased magnet transformer, an AC signal generator, and a signal analysis module. The biased magnet transformer includes an upper clamp heat sink 10, a lower clamp heat sink 20, a magnetic core 30, and windings. The magnetic core 30 is clamped between the upper clamp heat sink 10 and the lower clamp heat sink 20. The magnetic core 30 has two winding posts arranged at a left-right distance. The windings include a first winding 40 and a second winding 50, which are respectively wound on the two winding posts. The first winding 40 is provided with a first input pin 41 and a fourth input pin 42, and the second winding 50 is provided with a second input pin 51 and a third input pin 52. The first input pin 41 and the second input pin 51 are the primary side, and the third input pin 52 and the fourth input pin 42 are the secondary side. The first input pin 41 and the second input pin 51 are connected in series with the DC circuit, and the third input pin 52 and the fourth input pin 42 are connected to the AC signal generator.
[0047] The signal analysis module is configured to analyze a signal generated by a secondary side according to a direct current circuit connected to a primary side, and control an alternating current signal generator to generate an alternating current signal based on the signal; in operation, the alternating current signal generator generates an alternating current signal and applies the alternating current signal to a third input pin 52 and a fourth input pin 42 of the secondary side, and the primary side generates an interference alternating current signal and applies the interference alternating current signal to the direct current circuit via a first input pin 41 and a second input pin 51. Specifically, when the device is used for testing, after the first input pin 41 and the second input pin 51 are connected in series into the direct current circuit, the secondary side generates a signal according to the direct current circuit connected to the primary side, the signal analysis module analyzes the signal (in some embodiments, the secondary side induces an equivalent medium- and high-frequency sine or trapezoidal wave current, which is converted by the signal analysis module to form a waveform or complete conversion of voltage and current data), controls the alternating current signal generator to generate an alternating current signal based on the analyzed signal, and the alternating current signal generator applies the alternating current signal to the third input pin 52 and the fourth input pin 42 of the secondary side. At this time, the primary side generates an interference alternating current signal and applies the interference alternating current signal to the direct current circuit via the first input pin 41 and the second input pin 51, thereby forming a strong disturbance. Then the data of the load system 203 is tested, and the waveform distortion and system stability are checked, thus completing the interference test.
[0048] The magnetic core 30 is a silicon-iron magnetic core 30, and the silicon-iron magnetic core 30 is a structure formed by splicing a plurality of silicon-iron magnetic blocks 31. Since the silicon-iron magnetic blocks 31 have a good DC superposition capability, the magnetic core can be applied in direct current circuits and is suitable for high-frequency applications.
[0049] The winding columns comprise a first winding column 32 and a second winding column 33; after being spliced, the silicon-iron magnetic core 30 forms a "square-shaped" structure, with the first winding column 32 located on the left side and the second winding column 33 located on the right side. The first winding 40 is wound around the outside of the first winding column 32, and the second winding 50 is wound around the outside of the second winding column 33. The upper sides of the first winding 40 and the second winding 50 abut against the lower part of an upper partition plate 101, the lower sides of the first winding 40 and the second winding 50 abut against the upper part of a lower partition plate 102, the first winding column 32 and the second winding column 33 pass through the upper partition plate 101 and the lower partition plate 102, the upper side of the upper partition plate 101 is limited by the inner upper side wall of the silicon-iron magnetic core 30, and the lower side of the lower partition plate 102 is limited by the inner lower side wall of the silicon-iron magnetic core 30.
[0050] The upper clamping heat sink 10 and the lower clamping heat sink 20 are made of aluminum alloy, which can achieve better heat dissipation. The upper clamping heat sink 10 and the lower clamping heat sink 20 are located at the upper and lower ends of the magnetic core 30, respectively. The upper clamping heat sink 10 and the lower clamping heat sink 20 are arranged symmetrically, and are connected by several tie bolts 60. By tightening the tie bolts 60, the upper clamping heat sink 10 and the lower clamping heat sink 20 form a clamping constraint force on the magnetic core 30, thereby achieving assembly and fixation. In addition, brackets 70 are provided on both the left and right sides of the lower end of the lower clamping heat sink 20, and the lower ends of the tie bolts 60 pass through the lower clamping heat sink 20 and are locked to the corresponding brackets 70 by nuts.
[0051] The upper clamping heat sink 10 and the lower clamping heat sink 20 each have an upper insertion part 11 and a lower insertion part 21, which are inserted into the interior of the magnetic core 30. The upper clamping heat sink 10 and the lower clamping heat sink 20 each have several heat dissipation holes 80 arranged sequentially along the left-right direction in their middle portions. The heat dissipation holes 80 penetrate the upper and lower sides of the corresponding clamping heat sink. The upper insertion part 11 and the lower insertion part 21 each have an upper through groove 111 and a lower through groove 211, which are connected. One of the heat dissipation holes 80 is connected to the through groove of the corresponding insertion part. Thus, through the combined design of the heat dissipation holes 80, the upper through groove 111, and the lower through groove 211, a heat dissipation channel can be formed within the magnetic core 30. The air channel and the aluminum alloy clamping heat sink are integrally formed, resulting in better heat dissipation.
[0052] In this embodiment, there are two upper insertion parts 11 and two lower insertion parts 21. The two upper insertion parts 11 are arranged symmetrically on the left and right, and the two lower insertion parts 21 are arranged symmetrically on the left and right, so that the two upper insertion parts 11 and the two lower insertion parts 21 are respectively inserted into the first winding post 32 and the second winding post 33.
[0053] The upper clamp heat sink 10 and the lower clamp heat sink 20 are provided with slots 90 extending in the left and right direction on both the front and rear sides. The slots 90 penetrate the upper and lower sides of the corresponding clamp heat sink, so that the upper surface of the magnetic core 30 is exposed on the lower side of the slot 90, which is more conducive to heat dissipation.
[0054] The frequency of the interference AC signal is preferably 500Hz-5kHz, so that a 500Hz-5kHz AC signal can be forcibly added to the DC circuit to play a strong interference role; preferably, the interference AC signal can be a 160V 20A AC signal. In application, the 160V 20A AC signal can be forcibly superimposed into a 160V 200A DC working circuit for testing.
[0055] In some embodiments, the first winding 40 and the second winding 50 can be a reactor winding and a transformer winding, respectively, so as to integrate the transformer and the reactor into one product, changing the traditional separate structure where they are installed and arranged independently.
[0056] like Figure 7 As shown, the DC circuit structure of this utility model may include a battery pack 201, an inverter system 202 and a load system 203 connected in sequence, with the first input pin 41 and the second input pin 51 connected in series between the inverter system 202 and the load system 203.
[0057] The DC circuit interference device based on biased magnetic transformer provided by this utility model is a signal extractor used in interference test circuits, or an interference device that simulates a signal applied to a powerful interference source; it is particularly suitable for testing complex receiver environments and interference states in situations where AC and DC superposition is required.
[0058] In summary, the key design feature of this utility model lies in its combination of a biased magnetic transformer and an AC signal generator. The biased magnetic transformer includes an upper clamp heat sink, a lower clamp heat sink, a magnetic core, and windings. The windings include a first winding and a second winding. The first winding has a first input pin and a fourth input pin, and the second winding has a second input pin and a third input pin. The first and second input pins are the primary side, and the third and fourth input pins are the secondary side. The first and second input pins are connected in series with a DC circuit, and the third and fourth input pins are connected to the AC signal generator. During operation, the AC signal generator generates an AC signal, which is then applied to the third and fourth input pins on the secondary side. An interfering AC signal is generated on the primary side and applied to the DC circuit via the first and second input pins. This allows the interfering AC signal to be forcibly injected into the DC circuit, thus creating interference. When applied to testing, it can introduce a strong AC signal into a DC circuit to meet the user's testing needs. The frequency and amplitude of the introduced AC signal can be arbitrarily adjusted according to the testing requirements. Furthermore, by designing the magnetic core as an iron-silicon core, which is a structure formed by splicing several iron-silicon magnetic blocks, it can be applied to DC circuits due to the good DC superposition capability of the iron-silicon magnetic blocks. It is also suitable for high-frequency applications. In addition, by making the upper and lower clamping heat sinks made of aluminum alloy, better heat dissipation can be achieved. Several heat dissipation holes are provided in the middle of the upper and lower clamping heat sinks. The upper and lower insertion parts have upper and lower through slots, respectively, which are connected to each other. One of the heat dissipation holes is connected to the through slot of the corresponding insertion part. In this way, the combination of heat dissipation holes, upper through slots, and lower through slots forms a heat dissipation channel within the magnetic core. The air channel and the aluminum alloy clamping heat sink are integrally formed, which can achieve better heat dissipation effect.
[0059] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A DC circuit interference device based on a biased magnetic transformer, characterized in that: comprising a bias magnet transformer and an alternating current signal generator; the bias magnet transformer comprises an upper clamping heat dissipation plate, a lower clamping heat dissipation plate, a magnetic core and a winding; the magnetic core is clamped between the upper clamping heat dissipation plate and the lower clamping heat dissipation plate, the magnetic core is provided with two winding columns arranged at a left-right spacing, the winding comprises a first winding and a second winding, and the first winding and the second winding are respectively wound on the two winding columns; the first winding is provided with a first input pin and a fourth input pin, and the second winding is provided with a second input pin and a third input pin; the first input pin and the second input pin form a primary side, the third input pin and the fourth input pin form a secondary side, the first input pin and the second input pin are used for being connected in series to a direct current circuit, and the third input pin and the fourth input pin are connected with the alternating current signal generator.
2. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: the magnetic core is an iron-silicon magnetic core, and the iron-silicon magnetic core is a structure formed by splicing a plurality of iron-silicon magnetic blocks.
3. The DC circuit interference device based on a biased magnetic transformer according to claim 2, characterized in that: the winding columns comprise a first winding column and a second winding column; after the iron-silicon magnetic core is spliced and formed, a square-shaped structure is formed, the first winding column is arranged on the left side, the second winding column is arranged on the right side, the first winding is wound outside the first winding column, and the second winding is wound outside the second winding column.
4. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are respectively located at the upper end and the lower end of the magnetic core, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are arranged vertically symmetrically, and the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are connected by a plurality of counter-pull bolts; by tightening the plurality of counter-pull bolts, the upper clamping heat dissipation plate and the lower clamping heat dissipation plate form clamping binding force on the magnetic core, so as to realize assembly and fixation.
5. The DC circuit interference device based on a biased magnetic transformer according to claim 4, characterized in that: the upper clamping heat dissipation plate and the lower clamping heat dissipation plate are respectively provided with an upper inserting part and a lower inserting part, and the upper inserting part and the lower inserting part are oppositely inserted into the magnetic core.
6. The DC circuit interference device based on a biased magnetic transformer according to claim 5, characterized in that: a plurality of heat dissipation holes arranged sequentially at intervals along the left-right direction are arranged in the middle of each of the upper clamping heat dissipation plate and the lower clamping heat dissipation plate, the heat dissipation holes penetrate through the upper and lower sides of the corresponding clamping heat dissipation plate, the upper inserting part and the lower inserting part are respectively provided with an upper through groove and a lower through groove, the upper through groove is communicated with the lower through groove, and one of the heat dissipation holes is communicated with the through groove of the corresponding inserting part.
7. The DC circuit interference device based on a biased magnetic transformer according to claim 4, characterized in that: brackets are arranged on the left and right sides of the lower end of the lower clamping heat dissipation plate, and the lower ends of the plurality of counter-pull bolts pass through the lower clamping heat dissipation plate and are locked and fixed on the corresponding brackets by nuts.
8. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: hollow grooves extending along the left-right direction are arranged on the front and rear sides of each of the upper clamping heat dissipation plate and the lower clamping heat dissipation plate, and the hollow grooves penetrate through the upper and lower sides of the corresponding clamping heat dissipation plate.
9. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: the material of the upper clamping heat dissipation plate and the lower clamping heat dissipation plate is aluminum alloy.