Direct-current circuit interference adding device based on magnetic biasing transformer

Abstract

The invention discloses a direct-current circuit interference adding device based on a magnetic biasing transformer. The direct-current circuit interference adding device comprises the magnetic biasing transformer, an alternating-current signal generator and a signal analysis module. The magnetic biasing transformer comprises an upper clamping piece heat dissipation plate, a lower clamping piece heat dissipation plate, a magnetic core and a winding; the winding comprises 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 input pin and the second input pin are primary sides, the third input pin and the fourth input pin are secondary sides, the first input pin and the second input pin are used for being connected in series with a direct current circuit, and the third input pin and the fourth input pin are connected with an alternating current signal generator; during working, the alternating current signal generator generates an alternating current signal and adds the alternating current signal to the secondary side, the primary side generates an interference alternating current signal and adds the interference alternating current signal to the direct current circuit, and the alternating current signal can be injected into the direct current circuit to play a role in interference.

Description

Technical Field

[0001] This invention relates to the field of DC circuit interference testing technology, and in particular to a DC circuit interference adding device based on a bias 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 invention, the applicant has carefully researched a new technical solution to solve the above-mentioned problems. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide a DC circuit interference device based on a biased magnetic transformer, which can inject AC signals into a DC circuit to achieve interference.

[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, an AC signal generator, and a signal analysis module;

[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] The signal analysis module is used to analyze the signal generated by the secondary side according to the DC circuit connected to the primary side, and control the AC signal generator to generate an AC signal according to this signal;

[0012] During operation, the AC signal generator generates an AC signal and adds the AC signal to the third input pin and the fourth input pin of the secondary side. The primary side generates an interfering AC signal and adds the interfering AC signal to the DC circuit through the first input pin and the second input pin.

[0013] As a preferred solution, 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.

[0014] As a preferred solution, the winding columns include a first winding column and a second winding column; after the iron-silicon magnetic core is spliced, a "mouth" - shaped structure is formed. The left side is the first winding column, and the right side is the second winding column. The first winding is wound around the outside of the first winding column, and the second winding is wound around the outside of the second winding column.

[0015] As a preferred solution, the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate are respectively located at the upper end and the lower end of the magnetic core. The upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate are arranged symmetrically up and down, and the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate are connected by a plurality of tie bolts; by tightening the plurality of tie bolts, the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate form a clamping binding force on the magnetic core to achieve assembly fixation.

[0016] As a preferred solution, the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate respectively have an upper insertion portion and a lower insertion portion, and the upper insertion portion and the lower insertion portion are inserted into the inside of the magnetic core in an opposite direction.

[0017] As a preferred solution, a plurality of heat dissipation holes are arranged at intervals in the left - right direction in the middle of the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate. The heat dissipation holes penetrate through the upper and lower sides of the corresponding clamping piece heat dissipation plate. The upper insertion portion and the lower insertion portion respectively have an upper through - slot and a lower through - slot, and the upper through - slot is connected to the lower through - slot. One of the heat dissipation holes is communicated with the through - slot of the corresponding insertion portion.

[0018] As a preferred solution, brackets are arranged on both the left and right sides at the lower end of the lower clamping piece heat dissipation plate. The lower ends of the plurality of tie bolts pass through the lower clamping piece heat dissipation plate and are locked on the corresponding brackets by nuts.

[0019] As a preferred solution, empty slots extending in the left - right direction are arranged on both the front and rear sides of the upper clamping piece heat dissipation plate and the lower clamping piece heat dissipation plate. The empty slots penetrate through the upper and lower sides of the corresponding clamping piece heat dissipation plate.

[0020] As a preferred embodiment, the upper clamp heat sink and the lower clamp heat sink are made of aluminum alloy.

[0021] As a preferred embodiment, the frequency of the interfering AC signal is 500Hz-5kHz.

[0022] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly combines a biased magnetic transformer, an AC signal generator, and a signal analysis module. 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 in a DC circuit, and the third and fourth input pins are connected to the AC signal generator. Therefore, during operation, the signal analysis module can analyze the signal generated by the DC circuit connected to the primary side on the secondary side, and control the AC signal generator to generate an AC signal based on the signal. The AC signal is then added to the third and fourth input pins on the secondary side. The primary side generates an interfering AC signal and adds this interfering AC signal to the DC circuit through the first and second input pins. In this way, it can forcibly inject the interfering AC signal into the DC circuit to play an interference role. Thus, when it is applied to testing, a strong AC signal can be added to the DC circuit to meet the user's testing requirements. Moreover, the frequency and amplitude of the added AC signal can be arbitrarily adjusted according to the testing requirements.

[0023] 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.

[0024] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1This is a three-dimensional structural schematic diagram of a biased magnetic transformer according to an embodiment of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the biased magnet transformer according to another embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional schematic diagram of a biased magnetizing transformer according to an embodiment of the present invention;

[0028] Figure 4 This is an exploded view of a biased magnetizing transformer according to an embodiment of the present invention;

[0029] Figure 5 This is a partial structural exploded view of the bias magnet transformer according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the magnetic core of a bias transformer according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of an embodiment of the present invention applied to a DC circuit.

[0032] Explanation of reference numerals in the attached diagram:

[0033] 10. Upper clamp heat sink plate; 11. Upper insertion part

[0034] 111. Upper through slot 20. Lower clamp heat sink plate

[0035] 21. Lower insertion part 211. Lower through groove

[0036] 30. Magnetic core; 31. Ferrosilicon magnetic block

[0037] 32. First revolution around the pillar 33. Second revolution around the pillar

[0038] 40. First winding; 41. First input pin

[0039] 42. Fourth input pin; 50. Second winding

[0040] 51. Second input pin 52. Third input pin

[0041] 60. Tie bolts; 70. Brackets

[0042] 80. Heat dissipation holes; 90. Empty slots

[0043] 101. Upper partition; 102. Lower partition

[0044] 201. Battery pack; 202. Inverter system

[0045] 203. Load system. Detailed Implementation

[0046] In the description of this invention, 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 product of this invention is in use, they are only for the convenience of describing this invention 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 invention.

[0047] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of an embodiment of the present invention, which is mainly used, but not limited to, for testing the power output quality and system stability of energy storage stations.

[0048] 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.

[0049] The signal analysis module is used to analyze the signals generated by the secondary side according to the DC circuit connected to the primary side, and control the AC signal generator to generate AC signals according to these signals. During operation, the AC signal generator generates AC signals and adds the AC signals to the third input pin 52 and the fourth input pin 42 of the secondary side. The primary side generates interfering AC signals and adds the interfering AC signals to the DC circuit through the first input pin 41 and the second input pin 51. Specifically, when it is applied to testing, when the first input pin 41 and the second input pin 51 are connected in series to the DC circuit, the secondary side generates signals according to the DC circuit connected to the primary side. The signal analysis module analyzes these signals (in some embodiments, the secondary side will induce an equal high-frequency sine or trapezoidal wave current, which is converted by the signal analysis module to form waveform or voltage-current data conversion) and controls the AC signal generator to generate AC signals according to these signals. The AC signal generator adds the AC signals to the third input pin 52 and the fourth input pin 42 of the secondary side. At this time, the primary side generates interfering AC signals and adds the interfering AC signals to the DC circuit through the first input pin 41 and the second input pin 51, thus forming a strong perturbation. Then, the data of the load system 203 is tested, and the distortion of the waveform and the stability of the system are checked to complete the interference test.

[0050] The magnetic core 30 is an iron-silicon magnetic core 30, and the iron-silicon magnetic core 30 is a structure formed by splicing several iron-silicon magnetic blocks 31. Since the iron-silicon magnetic blocks 31 have good DC superposition ability, they can be applied to DC circuits and are suitable for high-frequency applications.

[0051] The winding columns include a first winding column 32 and a second winding column 33. After the iron-silicon magnetic core 30 is spliced, it forms a "mouth" - shaped structure. The left side is the first winding column 32, and the right side is the second winding column 33. 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 side of an upper partition 101, and the lower sides of the first winding 40 and the second winding 50 abut against the upper side of a lower partition 102. The first winding column 32 and the second winding column 33 pass through the upper partition 101 and the lower partition 102. The upper side of the upper partition 101 is limited by the inner upper side wall of the iron-silicon magnetic core 30, and the lower side of the lower partition 102 is limited by the inner lower side wall of the iron-silicon magnetic core 30.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] like Figure 7 As shown, the DC circuit structure of the present invention 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.

[0059] The DC circuit interference device based on biased magnetic transformer provided by this invention is a signal extractor used in interference test circuits, or an interference device that simulates a strong interference source signal; it is particularly suitable for testing complex receiver environments and interference states in situations where AC and DC superposition is required.

[0060] In summary, the key design feature of this invention lies in the combined design of a biased magnetic transformer, an AC signal generator, and a signal analysis module. 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 signal analysis module analyzes the signal generated on the secondary side based on the DC circuit connected to the primary side, and controls the AC signal generator to generate an AC signal, which is then added to the third and fourth input pins on the secondary side. Meanwhile, the primary side generates an interfering AC signal, which is added to the DC circuit via the first and second input pins. This allows the interference AC signal to be filtered out. A strong AC signal is forcibly injected into the DC circuit to act as interference, thereby introducing a strong AC signal into the DC circuit during testing to meet the user's testing requirements. The frequency and amplitude of the introduced AC signal can be arbitrarily adjusted according to the testing needs. Furthermore, by designing the magnetic core as a ferrosilicon core, which is a structure formed by splicing several ferrosilicon magnetic blocks, it is possible to apply it to DC circuits due to the good DC superposition capability of ferrosilicon magnetic blocks, and it is 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 set 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.

[0061] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A DC circuit interference device based on a biased magnetic transformer, characterized in that: It includes a bias magnetic transformer, an AC signal generator and a signal analysis module; The bias magnetic transformer includes an upper clamping plate heat sink, a lower clamping plate heat sink, a magnetic core and windings; The magnetic core is clamped between the upper clamping plate heat sink and the lower clamping plate heat sink. The magnetic core has two winding columns arranged at a left-right interval. The windings include a first winding and a second winding, and the first winding and the second winding are respectively wound around the two winding columns; A first input pin and a fourth input pin are provided on the first winding, and a second input pin and a third input pin are provided on the second winding; the first input pin and the second input pin are on the primary side, and the third input pin and the fourth input pin are on the secondary side. The first input pin and the second input pin are used to be connected in series to a DC circuit, and the third input pin and the fourth input pin are connected to the AC signal generator; The signal analysis module is used to analyze the signal generated by the secondary side according to the DC circuit connected to the primary side, and control the AC signal generator to generate an AC signal according to this signal; During operation, the AC signal generator generates an AC signal and adds the AC signal to the third input pin and the fourth input pin on the secondary side. The primary side generates an interfering AC signal and adds this interfering AC signal to the DC circuit through the first input pin and the second input pin.

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 several 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 include a first winding column and a second winding column; after the iron-silicon magnetic core is spliced, an "open" - shaped structure is formed. The left side is the first winding column, and the right side is the second winding column. 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 plate heat sink and the lower clamping plate heat sink are respectively located at the upper end and the lower end of the magnetic core. The upper clamping plate heat sink and the lower clamping plate heat sink are symmetrically arranged up and down, and the upper clamping plate heat sink and the lower clamping plate heat sink are connected by several tension bolts; by tightening the several tension bolts, the upper clamping plate heat sink and the lower clamping plate heat sink form a clamping binding force on the magnetic core to achieve assembly fixation.

5. The DC circuit interference device based on a biased magnetic transformer according to claim 4, characterized in that: The upper clamping plate heat sink and the lower clamping plate heat sink respectively have an upper insertion part and a lower insertion part, and the upper insertion part and the lower insertion part are inserted into the inside of the magnetic core in an opposite direction.

6. The DC circuit interference device based on a biased magnetic transformer according to claim 5, characterized in that: A number of heat dissipation holes are arranged at intervals in the left - right direction in the middle of the upper clamping plate heat sink and the lower clamping plate heat sink. The heat dissipation holes penetrate through the upper and lower sides of the corresponding clamping plate heat sink. The upper insertion part and the lower insertion part respectively have an upper through - slot and a lower through - slot, and the upper through - slot and the lower through - slot are connected. One of the heat dissipation holes is connected to the through - slot of the corresponding insertion 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 at the lower end of the lower clamping plate heat sink, and the lower ends of the several tension bolts pass through the lower clamping plate heat sink and are locked to the corresponding brackets by nuts.

8. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: Empty slots extending in the left - right direction are arranged on the front and rear sides of the upper clamping plate heat sink and the lower clamping plate heat sink, and the empty slots penetrate through the upper and lower sides of the corresponding clamping plate heat sink.

9. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: The materials of the upper clamping plate heat sink and the lower clamping plate heat sink are aluminum alloy.

10. The DC circuit interference device based on a biased magnetic transformer according to claim 1, characterized in that: The frequency of the interfering AC signal is 500HZ - 5KHZ.

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