A current output mechanism and a test device

Abstract

The present invention relates to a current output mechanism and a test device. The test device includes a current booster and a current output mechanism. The input terminal of the current booster is connected to an external power supply, and the output terminal of the current booster is connected to the current output mechanism. The current output mechanism includes a first output unit and a second output unit. The first output unit encloses a containing cavity, and the output end of the second output unit is inserted into the containing cavity. The output end of the second output unit is connected to the inflow end of the first output unit, and the first output unit and the second output unit together form a closed loop. The second output unit is used to cooperate with the first output unit to shunt the current in the closed loop. By setting the first output unit and the second output unit, the shunting of the current in the closed loop is realized. Thus, the resistance and inductance in the closed loop are reduced, and further the inductive reactance of the closed loop is reduced, so that the apparent power of the power supply is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of current output test devices, and in particular to a current output mechanism and a test device. Background Art

[0002] Currently, in the detection items of some power electronic devices such as current monitoring devices and current transformers, there will be a power frequency short-time overcurrent withstand test, and the test current is generally relatively high. In a strong current circuit, the inductive reactance of cables or copper bars has a great influence.

[0003] Traditional strong current output devices include a power input, a current booster, an output copper bar, connection terminals, and a test output component. Among them, the power input enhances the current output capacity through the current booster. The output end of the current booster is connected to the connection terminals through the output copper bar, and one end of the connection terminals facing away from the output copper bar is connected to the test output component. The input power capacity of the traditional strong current output device mainly depends on the loop impedance of the loop composed of the internal resistance of the current booster coil, the output copper bar, the connection terminals, the test output component, etc. The loop impedance is composed of the internal resistance of the current booster coil in the loop, the output copper bar resistance, the cable resistance between the test output component and the connection terminals, the leakage inductance of the current booster, and the output loop inductive reactance. In the case of a very strong current, the weak inductive reactance of the loop can have a greater impact on the power supply.

[0004] However, under strong current, the resistance of the loop (i.e., the internal resistance of the current booster coil, the output copper bar resistance, and the cable resistance between the test output component and the connection terminals) can be reduced by increasing the cross-sectional area of the output copper bar so that the resistance of the loop can be controlled within dozens of micro-ohms; while the inductance of the loop is difficult to effectively reduce because it is necessary to provide a loop for output detection. Even if it is less than 1 microhenry, it can generate an output loop inductive reactance of several hundred micro-ohms, resulting in a relatively high apparent power of the required power input. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a current output mechanism and a test device, and its advantage is that it can reduce the apparent power of the power input.

[0006] The above object of the present invention is achieved by the following technical solutions: On the one hand, the present invention provides a current output mechanism, including a first output unit and a second output unit. The first output unit encloses a receiving cavity, and the output end of the second output unit is inserted into the receiving cavity. The input end of the second output unit extends to the outside of the receiving cavity. The input end of the second output unit is used for current to flow into the second output unit. The output end of the second output unit is connected to the inflow end of the first output unit, and the outflow end of the first output unit is used for the current to flow out of the first output unit. The first output unit and the second output unit together form a closed loop; the second output unit is used to cooperate with the first output unit to shunt the current in the closed loop.

[0007] Preferably, for the current output mechanism provided by the present invention, the first output unit includes a connection component and a fixing component. One end of the connection component is detachably connected to the fixing component, and the end of the fixing component facing away from the connection component is connected to the output end of the second output unit.

[0008] Preferably, for the current output mechanism provided by the present invention, the connection component includes an output member and two connection members. The two connection members are arranged oppositely, and one end of each of the two connection members is connected to the output member, so that the two connection members are connected in parallel. The two connection members enclose a first chamber; the end of the output member away from the connection members is used for the current in the closed loop to flow out.

[0009] Preferably, for the current output mechanism provided by the present invention, the fixing component includes two fixing members. The two fixing members are arranged oppositely, and the fixing members are arranged in one-to-one correspondence with the connection members. The two fixing members enclose a second chamber. The first chamber is communicated with the second chamber, and the first chamber and the second chamber together form the receiving cavity.

[0010] Preferably, for the current output mechanism provided by the present invention, a first channel and a second channel are respectively arranged at two opposite ends of the second chamber. Both the first channel and the second channel are communicated with the second chamber. The first channel is adapted to the connection component, and one end of the connection component is inserted into the first channel, and the outer wall of the connection component abuts against the inner wall of the first channel; the second channel is adapted to the output end of the second output unit, and the output end of the second output unit is inserted into the second channel, and the outer wall of the output end of the second output unit abuts against the inner wall of the first channel.

[0011] Preferably, for the current output mechanism provided by the present invention, the fixing member is U-shaped, and a connecting portion and a fixing portion are respectively arranged on both sides of the open end of the fixing member, and both the connecting portion and the fixing portion extend outward along the length direction of the first chamber.

[0012] Preferably, for the current output mechanism provided by the present invention, the second output unit includes an input component and an output component. One end of the input component is detachably connected to the output component, and the end of the output component facing away from the input component is connected to the inflow end of the first output unit; the output component is used to be connected to the device under test.

[0013] Preferably, for the current output mechanism provided by the present invention, the input component includes an input piece and two shunt pieces. The two shunt pieces are arranged oppositely, and one end of each of the two shunt pieces is connected to one end of the input piece, so that the two shunt pieces are connected in parallel, and the end of the input piece facing away from the shunt pieces is used for current to flow into the closed loop.

[0014] Preferably, for the current output mechanism provided by the present invention, the output component includes two test rods. The two test rods are arranged oppositely, and the test rods are arranged in one-to-one correspondence with the shunt pieces. One end of the test rod is detachably connected to the shunt piece, and the other end of the test rod is detachably connected to the inflow end of the first output unit.

[0015] On the other hand, a test device provided by the present invention includes a current booster and the above-mentioned current output mechanism; the input terminal of the current booster is connected to an external power supply, the output terminal of the current booster is connected to the current output mechanism, and the end of the current output mechanism away from the current booster is used to be connected to the device under test.

[0016] In summary, the beneficial technical effects of the present invention are as follows: The present application provides a current output mechanism and a test device. The test device includes a current booster and a current output mechanism. The input terminal of the current booster is connected to an external power supply, and the output terminal of the current booster is connected to the current output mechanism. One end of the current output mechanism facing away from the current booster is used to connect to a device under test. The current output mechanism includes a first output unit and a second output unit. The first output unit encloses a receiving cavity, and the output end of the second output unit is inserted into the receiving cavity. The input end of the second output unit extends to the outside of the receiving cavity. The input end of the second output unit is used for current to flow into the second output unit. The output end of the second output unit is connected to the inflow end of the first output unit. The outflow end of the first output unit is used for current to flow out of the first output unit. The first output unit and the second output unit together form a closed loop. The second output unit is used to cooperate with the first output unit to shunt the current in the closed loop. By setting the first output unit and the second output unit, shunting of the current in the closed loop is achieved. Thereby, the resistance and inductance in the closed loop are reduced, and further the inductive reactance of the closed loop is reduced, so that the apparent power of the power supply is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a test device provided by an embodiment of the present invention.

[0018] Figure 2 FIG. is a schematic structural diagram of a current output mechanism in a test device provided by an embodiment of the present invention.

[0019] In the figure, 1, test device; 10, current booster; 101, input terminal; 102, output terminal; 20, current output mechanism; 201, first output unit; 2011, receiving cavity; 2012, connection component; 2013, output member; 2014, connecting member; 2015, first chamber; 2016, fixing component; 2017, second chamber; 2018, fixing member; 2019, connecting portion; 2031, fixing portion; 202, second output unit; 2021, input component; 2022, input member; 2023, shunt member; 2024, horizontal portion; 2025, bending portion; 2026, inclined portion; 2027, mounting portion; 2028, output component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Refer to Figure 1 and Figure 2, a test device 1 disclosed by the present invention, includes a current booster 10 and a current output mechanism 20; an input terminal 101 of the current booster 10 is connected to an external power supply, an output terminal 102 of the current booster 10 is connected to the current output mechanism 20, and one end of the current output mechanism 20 away from the current booster 10 is used to be connected to a device under test; during use, a small current output by the power supply is increased to a large current by the current booster 10, and the large current is input into the device under test through the current output mechanism 20 to perform a power frequency short-time overcurrent withstand test on the device under test.

[0022] Wherein, the current output mechanism 20 includes a first output unit 201 and at least one second output unit 202. The first output unit 201 encloses a receiving cavity 2011, an output end of the second output unit 202 is inserted into the receiving cavity 2011, an input end of the second output unit 202 extends to the outside of the receiving cavity 2011, the output end of the second output unit 202 is connected to an inflow end of the first output unit 201, the input end of the second output unit 202 and the outflow end of the first output unit 201 are both connected to the output terminal 102 of the current booster 10, the input end of the second output unit 202 is for current to flow into the second output unit 202, the outflow end of the first output unit 201 is for current to flow out of the first output unit 201, and the first output unit 201 and the second output unit 202 together form a closed loop; the second output unit 202 is used to cooperate with the first output unit 201 to shunt the current in the closed loop.

[0023] By providing the first output unit 201 and the second output unit 202, during use, a large current flows into the second output unit 202 and is shunted, and then, the two shunted currents flow back to the output terminal 102 of the current booster 10 through the first output unit 201, and the two currents converge at the output terminal 102; by shunting the large current, thus, the resistance and inductance in the closed loop are reduced, and further, the reactance of the closed loop is reduced, so that the apparent power of the power supply is reduced.

[0024] The output end of the second output unit 202 and the inflow end of the first output unit 201 can be connected by a metal bolt, and the output end of the second output unit 202 and the inflow end of the first output unit 201 can also be connected by a metal buckle, and this embodiment does not limit this.

[0025] Exemplarily, the first output unit 201 can be made of a copper bar. Of course, the first output unit 201 can also be made of a cable or other conductive materials.

[0026] To Figure 2Taking the shown orientation as an example, the left end of the first output unit 201 is the outflow end, the right end of the first output unit 201 is the inflow end, the left end of the second output unit 202 is the input end, and the right end of the second output unit 202 is the output end.

[0027] Among them, the device under test is sleeved on the second output unit 202. The device under test takes power through electromagnetic induction. The input terminal 101 of the current booster 10 is connected to the power supply, and the output terminal 102 of the current booster 10 is connected to the input end of the second output unit 202 and the outflow end of the first output unit 201. During use, when a large current flows into the second output unit 202, the large current is shunted. After the shunted current passes through the first output unit 201, it converges to the output terminal 102; by setting the second output unit 202, the second output unit 202 divides the first output unit 201 into two symmetric regions (region D1 and region D2) up and down, that is, divides the large current in the current output mechanism 20 into two symmetric currents, so that the magnetic field in region D1 cancels out the magnetic field in region D2, leaving only the magnetic field of the straight wire (that is, the magnetic field generated by the second output unit 202); that is, the inductance in region D1 cancels out the inductance in region D2, mainly leaving the inductance of the straight wire (that is, the inductance of the second output unit 202). Thus, the resistance and inductance of the closed loop are reduced, and further the inductive reactance of the closed loop is reduced.

[0028] The working principle of the test device 1 provided in this embodiment is as follows: the small current output by the power supply is increased to a large current by the current booster 10. The large current flows into the second output unit 202 and is shunted. The two shunted currents flow through the first output unit 201 and into the output terminal 102 of the current booster 10. At this time, the two currents converge at the output terminal 102, and the converged current repeats the above process.

[0029] Furthermore, in this embodiment, the second output unit 202 includes an input component 2021 and an output component 2028. One end of the input component 2021 is detachably connected to the output component 2028, the other end of the input component 2021 is connected to the output terminal 102 of the current booster 10, and the end of the output component 2028 facing away from the input component 2021 is connected to the inflow end of the first output unit 201; the output component 2028 is used to connect to the device under test; by setting the input component 2021 and the output component 2028 to be detachably connected, it is convenient to replace the output component 2028 so that the size of the output component 2028 is adapted to the device under test. Thus, the applicability of the test device 1 is improved.

[0030] Among them, the output component 2028 can adopt a copper bar, and the output component 2028 can also adopt a cable, which is not limited in this embodiment. In the realizable manner where the output component 2028 adopts a copper bar, the output component 2028 and the first output unit 201 can be connected by metal bolts.

[0031] Exemplarily, the input component 2021 can adopt a copper bar. Of course, the input component 2021 can also adopt other conductive materials.

[0032] Continue to refer to Figure 1 and Figure 2 In this embodiment, the input component 2021 includes an input part 2022 and two shunt parts 2023. The two shunt parts 2023 are arranged oppositely, and one ends of the two shunt parts 2023 are both connected to one end of the input part 2022, so that the two shunt parts 2023 are connected in parallel. The end of the input part 2022 facing away from the shunt parts 2023 is connected to the output terminal 102 of the current booster 10; by setting the two shunt parts 2023 to be connected in parallel, the large current is shunted, thereby reducing the resistance and inductance in the closed loop, further reducing the reactance of the closed loop, and reducing the apparent power of the power supply.

[0033] Among them, the two shunt parts 2023 are respectively a shunt part B1 and a shunt part B2. Taking Figure 2 the shown orientation as an example, the shunt part B1 is located above the shunt part B2.

[0034] In the realizable manner where the input component 2021 adopts a copper bar, in order to facilitate the connection of both shunt parts 2023 to the input part 2022, the shunt part 2023 includes a horizontal part 2024 and a bending part 2025. Both the horizontal part 2024 and the bending part 2025 are rod-shaped. The extending direction of the horizontal part 2024 is parallel to the extending direction of the output component 2028. One end of the horizontal part 2024 is connected to the bending part 2025, and the end of the bending part 2025 facing away from the horizontal part 2024 is connected to the input part 2022.

[0035] In the realizable manner where the input component 2021 adopts a copper bar, in order to facilitate the connection of the input part 2022 to the output terminal 102 of the current booster 10, the input part 2022 includes an inclined part 2026 and a mounting part 2027. Both the inclined part 2026 and the mounting part 2027 are rod-shaped. The extending direction of the mounting part 2027 is parallel to the extending direction of the horizontal part 2024. One end of the mounting part 2027 is connected to the output terminal 102 of the current booster 10, the other end of the mounting part 2027 is connected to one end of the inclined part 2026, a preset angle is formed between the mounting part 2027 and the inclined part 2026, and the end of the inclined part 2026 facing away from the mounting part 2027 is connected to the bending part 2025.

[0036] During use, a large current flows into the inclined portion 2026 through the installation portion 2027. Then, after passing through the input member 2022, the large current is divided into two paths of current, and the two paths of current flow into the shunt member B1 and the shunt member B2 respectively. Thus, the shunting of the large current is achieved.

[0037] Furthermore, in this embodiment, the output assembly 2028 includes two test rods, which are arranged oppositely. The test rods are arranged in one-to-one correspondence with the shunt member 2023. One end of the test rod is detachably connected to the shunt member 2023, and the other end of the test rod is connected to the inflow end of the first output unit 201. By providing the detachable connection between the test rod and the shunt member 2023, it is convenient to replace the test rod, thereby improving the versatility of the use of the test device 1.

[0038] Exemplarily, the test rod and the shunt member 2023 can be connected by a metal bolt, thereby facilitating the electrical connection between the test rod and the shunt member 2023.

[0039] Taking the plane perpendicular to the length direction of the test rod as the cross-section, the cross-sectional shape of the test rod can be rectangular or other polygons. In the realizable manner where the test rod is rectangular, when the outer side walls of the two horizontal portions 2024 are in contact with each other, the outer side walls of the two test rods are arranged in a fitting manner. The device under test is sleeved on the output assembly 2028, and the device under test takes power through electromagnetic induction.

[0040] Among them, the two test rods are respectively the test rod E1 and the test rod E2. Figure 2 Taking the shown orientation as an example, the test rod E1 is located above the test rod E2. The test rod E1 is connected to the shunt member B1, and the test rod E2 is connected to the shunt member B2.

[0041] Specifically, the extending directions of the two test rods are parallel to the extending direction of the horizontal portion 2024. One end of the horizontal portion 2024 away from the bending portion 2025 is connected to the test rod by a metal bolt.

[0042] During use, a through hole is formed on the device under test, and the output assembly 2028 is inserted into the through hole. The cross-sectional area of the output assembly 2028 is smaller than the cross-sectional area of the through hole. In the realizable manner where the outer side walls of the two test rods are in contact with each other, the cross-sectional area of the output assembly 2028 is equal to the sum of the cross-sectional areas of the two test rods. Thus, the cross-sectional area of the test rod needs to be determined according to the size of the cross-sectional area of the through hole of the device under test.

[0043] Among them, the two horizontal portions 2024 can be arranged at intervals, or the two horizontal portions 2024 can be arranged in a fitting manner. This embodiment does not limit this. It should be noted that the distance between the two test rods is basically the same as that between the two horizontal portions 2024.

[0044] Furthermore, in this embodiment, the first output unit 201 includes a connection component 2012 and a fixing component 2016. One end of the connection component 2012 is connected to the output terminal 102 of the current booster 10, and the other end of the connection component 2012 is detachably connected to the fixing component 2016. The end of the fixing component 2016 facing away from the connection component 2012 is connected to the output end of the second output unit 202. By providing that the connection component 2012 and the fixing component 2016 are detachably connected, it is thus convenient to maintain the fixing component 2016.

[0045] During use, both the connection component 2012 and the input component 2021 are arranged inside the housing of the test device 1, and both the fixing component 2016 and the output component 2028 are located outside the housing. The output component 2028 is installed inside the fixing component 2016 so that the fixing component 2016 and the output component 2028 form a small assembly. When replacing the output component 2028, the small assembly is removed as a whole, and then the output component 2028 is replaced. Thus, it is convenient to maintain the fixing component 2016 and the output component 2028.

[0046] Continue to refer to Figure 1 and Figure 2 In this embodiment, the connection component 2012 includes an output member 2013 and two connection members 2014. The two connection members 2014 are arranged oppositely, and one end of each of the two connection members 2014 is connected to the output member 2013 so that the two connection members 2014 are connected in parallel. The two connection members 2014 enclose a first chamber 2015. The end of the output member 2013 away from the connection members 2014 is connected to the output terminal 102 of the current booster 10.

[0047] Among them, the two connection members 2014 are respectively a connection member A1 and a connection member A2. Taking Figure 2 the shown orientation as an example, the connection member A1 is located above the connection member A2.

[0048] Specifically, both of the two shunt members 2023 are accommodated in the first chamber 2015, and the two shunt members 2023 are located at the middle position of the first chamber 2015 extending along its width direction. Taking Figure 2 the shown orientation as an example, the sorting order of the two connection members 2014 and the two shunt members 2023 is successively the connection member A1, the shunt member B1, the shunt member B2, and the connection member A2. Moreover, the connection member A1 and the connection member A2 are connected in parallel, and the shunt member B1 and the shunt member B2 are connected in parallel. Thus, the inductive reactance of the connection component 2012 and the input component 2021 is effectively reduced.

[0049] Among them, the structure of the connection member 2014 is basically the same as that of the shunt member 2023, and the structure of the connection member 2014 will not be elaborated here.

[0050] For the convenience of connecting both the input component 2022 and the output component 2013 to the output terminal 102 of the current booster 10, the input component 2022 and the output component 2013 are arranged oppositely.

[0051] It should be noted that the structure of the output component 2013 is basically the same as that of the input component 2022, and the structure of the output component 2013 will not be elaborated here. Further, in this embodiment, the fixing assembly 2016 includes two fixing members 2018 which are arranged oppositely, and the fixing members 2018 are arranged in one-to-one correspondence with the connecting members 2014. The two fixing members 2018 enclose a second chamber 2017, and the first chamber 2015 communicates with the second chamber 2017, and the first chamber 2015 and the second chamber 2017 together form a receiving cavity 2011.

[0052] Among them, the two fixing members 2018 are respectively a fixing member C1 and a fixing member C2. Figure 2 Taking the shown orientation as an example, the fixing member C1 is located above the fixing member C2.

[0053] Specifically, the output assembly 2028 is received in the second chamber 2017, and the output assembly 2028 is located at the middle position along the width direction of the second chamber 2017.

[0054] Further, in this embodiment, a first channel and a second channel are respectively arranged at opposite ends of the second chamber 2017. Both the first channel and the second channel communicate with the second chamber 2017. The first channel is adapted to the connecting assembly 2012, and the second channel is adapted to the output end of the second output unit 202.

[0055] Specifically, one end of each of the two connecting members 2014 facing away from the output component 2013 is inserted into the first channel, and the outer walls of the two connecting members 2014 are in contact with the inner wall of the first channel. The connecting member A1 is connected to the fixing member C1 by a fastening bolt, and the connecting member A1 is connected to the fixing member C2 by a fixing bolt. One end of each of the two test rods facing away from the input assembly 2021 is inserted into the second channel, and the outer walls of the two test rods are in contact with the inner wall of the second channel. The two test pieces and the two fixing members 2018 are connected by metal bolts.

[0056] Among them, the cross-sectional area of the first channel is larger than that of the second channel. Thus, it is avoided that the current output mechanism 20 has a break circuit phenomenon during use, and the firmness of the connection between the fixing assembly 2016 and the connecting assembly 2012 and the output assembly 2028 is improved.

[0057] It should be noted that Figure 2 Taking the shown orientation as an example, the first channel is located on the left side of the second chamber 2017, and the second channel is located on the right side of the second chamber 2017.

[0058] Furthermore, in this embodiment, the fixing member 2018 is U-shaped. On both sides of the open end of the fixing member 2018, a connecting portion 2019 and a fixing portion 2031 are respectively provided. Both the connecting portion 2019 and the fixing portion 2031 extend outward along the length direction of the first chamber 2015. On the one hand, by providing the connecting portion 2019, it is thus convenient for the connecting member 2014 to be connected to the fixing member 2018. On the other hand, by providing the fixing portion 2031, it is thus convenient for the test rod to be connected to the fixing member 2018.

[0059] Specifically, the extending directions of both the connecting portion 2019 and the fixing portion 2031 are parallel to the extending direction of the test rod. Among them, the two connecting portions 2019 form a first channel, and the two fixing portions 2031 form a second channel. The extending direction of the first channel is parallel to the extending direction of the second channel. In some realizable ways, the central axes of the first channel and the second channel are collinearly arranged.

[0060] During use, the connecting member A1 and the test rod E1 are respectively connected to the connecting portion 2019 and the fixing portion 2031 on the fixing member C1, and the connecting member A2 and the test rod E2 are respectively connected to the connecting portion 2019 and the fixing portion 2031 on the fixing member C2.

[0061] It should be noted that the shunt member B1, the test rod E1, the fixing member C1, and the connecting member A1 together form a region D1; the shunt member B2, the test rod E2, the fixing member C2, and the connecting member A2 together form a region D2.

[0062] The working principle of the test device 1 provided in this embodiment is as follows: The small current output by the power supply is increased to a large current after passing through the current booster 10. The large current flows into the input member 2022, and then the large current is split into two paths of current after passing through the input member 2022. The two paths of current respectively flow into the shunt member B1 and the shunt member B2. The current in the shunt member B1 sequentially flows through the test rod E1, the fixing member C1, the connecting member A1, and finally flows into the output terminal 102 of the current booster 10. The current in the shunt member B2 of the shunt member 2023 sequentially flows through the test rod E2, the fixing member C2, the connecting member A2, and finally flows into the output terminal 102 of the current booster 10. At this time, the two paths of current converge at the output terminal 102 of the current booster 10, and then the converged current continues to repeat the above steps.

[0063] The test device 1 provided by the present application includes a current booster 10 and a current output mechanism 20; the input terminal 101 of the current booster 10 is connected to an external power supply, the output terminal 102 of the current booster 10 is connected to the current output mechanism 20, and the end of the current output mechanism 20 away from the current booster 10 is used to be connected to a device under test; the current output mechanism 20 includes a first output unit 201 and a second output unit 202, the first output unit 201 encloses a receiving cavity 2011, the output end of the second output unit 202 is inserted into the receiving cavity 2011, the input end of the second output unit 202 extends to the outside of the receiving cavity 2011, the output end of the second output unit 202 is connected to the inflow end of the first output unit 201, and the input end of the second output unit 202 and the outflow end of the first output unit 201 are both connected to the output terminal 102 of the current booster 10, and the first output unit 201, the second output unit 202 and the output terminal 102 together form a closed loop; the second output unit 202 is used to cooperate with the first output unit 201 to shunt the current in the closed loop; by setting the first output unit 201 and the second output unit 202, the shunting of the current in the closed loop is realized. Thus, the resistance and inductance in the closed loop are reduced, and further the inductive reactance of the closed loop is reduced, so that the apparent power of the power supply is reduced.

[0064] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0065] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A current output mechanism, Features: A first output unit and a second output unit, wherein the first output unit is surrounded by a receiving cavity, an output end of the second output unit is inserted in the receiving cavity, an input end of the second output unit extends to the outside of the receiving cavity, the input end of the second output unit is used for current to flow into the second output unit, the output end of the second output unit is connected to the inflow end of the first output unit, the outflow end of the first output unit is used for the current to flow out of the first output unit, and the first output unit and the second output unit together form a closed loop; The second output unit is used to cooperate with the first output unit to shunt the current in the closed loop; The first output unit includes a connecting component and a fixing component, one end of the connecting component is detachably connected to the fixing component, and one end of the fixing component away from the connecting component is connected to the output end of the second output unit; The connection assembly includes an output member and two connection members, the two connection members are arranged opposite to each other, one end of the two connection members is connected to the output member, so that the two connection members are connected in parallel, and the two connection members are arranged to form a first chamber; One end of the output member away from the connecting member is used for the outflow of current in the closed loop; The second output unit comprises an input component and an output component, one end of the input component is detachably connected to the output component, and one end of the output component facing away from the input component is connected to the inflow end of the first output unit; The output component is used to connect to the device under test; The input assembly includes an input member and two shunt members, the two shunt members are arranged opposite to each other, one end of the two shunt members is connected to one end of the input member, so that the two shunt members are connected in parallel, and one end of the input member away from the shunt member is used for current to flow into the closed loop; The second output unit divides the first output unit into two symmetrical areas, area D1 and area D2, that is, divides the large current in the current output mechanism into two symmetrical currents, so that the magnetic field in area D1 and the magnetic field in area D2 cancel each other out, leaving only the straight wire magnetic field.

2. The current output mechanism according to claim 1, Features: The fixing assembly includes two fixing parts, the two fixing parts are arranged opposite to each other, the fixing parts and the connecting parts are arranged one by one, the two fixing parts surround a second chamber, the first chamber is connected to the second chamber, and the first chamber and the second chamber together constitute the accommodating cavity.

3. The current output mechanism according to claim 2, Features: The second chamber is provided with a first channel and a second channel at opposite ends thereof, the first channel and the second channel are both connected to the second chamber, the first channel is adapted to the connecting component, one end of the connecting component is inserted into the first channel, and the outer wall of the connecting component abuts against the inner wall of the first channel; The second channel is adapted to the output end of the second output unit. The output end of the second output unit is inserted into the second channel, and the outer wall of the output end of the second output unit abuts against the inner wall of the first channel.

4. The current output mechanism according to claim 3, wherein: The fixing member is U-shaped, and a connecting portion and a fixing portion are respectively arranged on both sides of the open end of the fixing member. Both the connecting portion and the fixing portion extend outward along the length direction of the first chamber.

5. The current output mechanism according to claim 1, wherein: The output assembly includes two test rods which are arranged oppositely. The test rods are arranged in one-to-one correspondence with the shunt members. One end of the test rod is detachably connected to the shunt member, and the other end of the test rod is detachably connected to the inflow end of the first output unit.

6. A test device, wherein: comprising a current booster and the current output mechanism according to any one of claims 1-5; The input terminal of the current booster is connected to an external power supply, the output terminal of the current booster is connected to the current output mechanism, and the end of the current output mechanism away from the current booster is used to be connected to a device under test.

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