Fully compatible impedance network
By designing a fully compatible impedance network and utilizing series resistors and switching inductors, the problem of existing technologies being incompatible with IEC and GB standards has been solved, enabling electromagnetic compatibility testing to adapt to different voltages and frequencies, and providing broader compatibility and flexibility.
Patent Information
- Application Number
- CN202423027307.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing technologies have failed to design or manufacture impedance networks compatible with both IEC61000-4-13 and GB17626.13 standards, and thus cannot meet electromagnetic compatibility testing requirements under different voltages and frequencies.
A fully compatible impedance network was designed to adapt to different voltages and frequencies by using series resistors and switching inductors. This includes a combination of three sets of resistors and multi-tap inductors, and relays are used to switch different circuit combinations to meet impedance requirements under different voltages and frequencies.
It achieves simultaneous compatibility with IEC61000-4-13 and GB17626.13 standards, adapts to electromagnetic compatibility testing under different voltages and frequencies, and provides broader compatibility and flexibility.
Smart Images
Figure CN223582043U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electromagnetic compatibility test, specifically is a kind of full compatible impedance network. BACKGROUND
[0002] In the latest electromagnetic compatibility test standard, there is a low-frequency immunity test standard for the harmonic and interharmonic (including main signal) of the AC power end with the input current of each phase not exceeding 16A.
[0003] The standard corresponds to the latest International Electrotechnical Commission (IEC) standard respectively:
[0004] IEC61000-4-13 standard 2015, low-frequency immunity test for the harmonic and interharmonic (including main signal) of the AC power end with the input current of each phase not exceeding 16A;
[0005] At the same time, there is also a corresponding latest China National Standardization Management Committee (GB) standard:
[0006] GB17626.13 standard 2006, low-frequency immunity test for the harmonic and interharmonic (including main signal) of the AC power end with the input current of each phase not exceeding 16A;
[0007] According to the above-mentioned latest IEC and GB harmonic and interharmonic immunity test standards, the corresponding appendix A has made the committee's recommendations for the resonance problem.
[0008] From the above-mentioned standard appendix, these standards all suggest adding an impedance network between the voltage source and the test device during the harmonic and interharmonic immunity test.
[0009] The impedance network recommended by GB17626.13 standard has the following resistance value:
[0010] For 240 / 415V, the phase line Z=0.24+j 0.15Ω, and the neutral line Z=0.16+j 0.10Ω In addition to the above-mentioned resistance value recommended by IEC61000-4-13 standard, it also considers the resistance value under the condition of 60Hz: for 120 / 208V, the phase line Z=0.10+j 0.04Ω, and the neutral line Z=0.10+j 0.03Ω for 347 / 600V, the phase line Z=0.29+j 0.07Ω, and the neutral line Z=0.30+j 0.04Ω Therefore, if you want to fully compatible IEC61000-4-13 and GB17626.13 standards, the impedance network recommended by the standard committee will inevitably contain three different impedance values to cope with different test voltages and frequencies.
[0011] Currently all manufacturers involved in the electromagnetic compatibility industry do not design or produce impedance networks that are fully compatible with the above two standards. SUMMARY
[0012] The utility model discloses a kind of fully compatible impedance networks, to solve the problems raised in the above background art.
[0013] To achieve the above object, the utility model provides the following technical scheme: a kind of fully compatible impedance networks, comprising:
[0014] The resistance R1-A1, the resistance R1-A and the switch RL4A connected with the input end;
[0015] Wherein, the other end of the resistance R1-A1 is connected with the resistance R1-A2, the other end of the resistance R1-A2 is connected with the other end of the resistance R1-A, one end of the resistance R2-A, the switch RL3A, the other end of the resistance R2-A is connected with the resistance R2-A1, the resistance R2-A2, the other end of the resistance R2-A2 is connected with the resistance R2-A3, the other end of the resistance R2-A1, the other end of the resistance R2-A3 is connected with the resistance R3-A1, the switch RL1A, the resistance R3-A, the other end of the resistance R3-A1 is connected with the resistance R3-A2, the other end of the resistance R3-A2, the other end of the resistance R3-A is connected with the switch RL2A, the other end of the switch RL1A, the other end of the switch RL2A, the other end of the switch RL3A, the other end of the switch RL4A is connected with one end of the inductor L-A, middle section of the inductor L-A, the other end of the inductor L-A, the other end of the inductor L-A is connected with the output end.
[0016] Preferably, the impedance network is compatible with IEC61000-4-13 and GB17626.13 standards.
[0017] Compared with the prior art, the utility model has the beneficial effects that:
[0018] The present scheme mainly solves the problem of simultaneously compatible with IEC61000-4-13 and GB17626.13 standards. GB17626.13 standard only recommends an impedance network with one resistance specification, while IEC61000-4-13 standard proposes two impedance networks with different resistance specifications for different voltages under 60Hz condition in addition to one resistance specification under the condition of 240Vac, 50Hz. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The circuit schematic diagram of the utility model;
[0020] Figure 2The utility model discloses a circuit schematic diagram. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0022] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0023] Embodiment one:
[0024] Please refer to Figures 1-2 The utility model provides a kind of technical scheme: a kind of impedance network compatible completely, comprising: resistance R1-A1 connected with input end, resistance R1-A, switch RL4A;
[0025] Wherein, the other end of the resistance R1-A1 is connected with resistance R1-A2, the other end of the resistance R1-A2 is connected with the other end of resistance R1-A, one end of resistance R2-A, switch RL3A, the other end of the resistance R2-A is connected with resistance R2-A1, resistance R2-A2, the other end of the resistance R2-A2 is connected with resistance R2-A3, the other end of the resistance R2-A1, resistance R2-A3 is connected with resistance R3-A1, switch RL1A, resistance R3-A, the other end of the resistance R3-A1 is connected with resistance R3-A2, the other end of the resistance R3-A2, the other end of resistance R3-A is connected with switch RL2A, the other end of the switch RL1A, the other end of switch RL2A, the other end of switch RL3A, the other end of switch RL4A is connected with one end of inductance L-A, inductance L-A middle section, inductance L-A middle section other, the other end of inductance L-A, the other end of inductance L-A is connected with output end.
[0026] The impedance network is compatible with IEC61000-4-13 and GB17626.13 standard.
[0027] As Figure 1The specific technical solutions of the scheme are as follows:
[0028] The resistance of each phase adopts a three-group series form, for example, the resistance of phase A adopts 93 mΩ, 130 mΩ and 57 mΩ in series; the resistance of the N neutral line adopts 94 mΩ, 53 mΩ and 145 mΩ in series.
[0029] The inductance of each phase adopts a multi-tap form, for example, the inductance of phase A can be combined as 477 μH, 186 μH and 106 μH; the inductance of the N neutral line can be combined as 318 μH, 106 μH and 79 μH.
[0030] The relay of each phase can switch to the change and combination of the multi-tap inductance and resistance, for example:
[0031] When RL1A and RL1B are closed, RL2A and RL2B are disconnected, RL3A and RL4B are disconnected, and RL4A and RL4B are disconnected, the resistance of 93 mΩ+130 mΩ in series can be realized, the inductance of 477 μH is cut in, and the inductance has a direct current resistance of 17 mΩ at this time, so that the A phase circuit cut-in of 240 mΩ and 477 μH can be realized.
[0032] Similarly, as shown in the figure, Figure 2 Under this condition, the resistance of 94 mΩ+53 mΩ in series can be realized, the inductance of 318 μH is cut in, and the inductance has a direct current resistance of 13 mΩ at this time, so that the N neutral line circuit cut-in of 160 mΩ and 318 μH can be realized.
[0033] Therefore, when RL1A and RL1B are closed, RL2A and RL2B are disconnected, RL3A and RL4B are disconnected, and RL4A and RL4B are disconnected, the impedance cut-in for 240 / 415V, phase line Z=0,24+j0,15Ω, neutral line Z=0,16+j0,10Ω can be realized.
[0034] Similarly, when RL1A and RL1B are disconnected, RL2A and RL2B are closed, RL3A and RL4B are disconnected, and RL4A and RL4B are disconnected, the impedance cut-in for 347 / 600V, phase line Z=0,29+j0,07Ω, neutral line Z=0,30+j0,04Ω can be realized.
[0035] Similarly, when RL1A and RL1B are disconnected, RL2A and RL2B are disconnected, RL3A and RL4B are closed, and RL4A and RL4B are disconnected, the impedance cut-in for 120 / 208V, phase line Z=0,10+j0,04Ω, neutral line Z=0,10+j0,03Ω can be realized.
[0036] In addition, the present scheme also has a bypass mode, when RL1A and RL1B are disconnected, RL2A and RL2B are disconnected, RL3A and RL4B are disconnected, and RL4A and RL4B are closed, all the resistance and inductance are not cut into the impedance network circuit, and the current between the voltage source and the test equipment directly flows through RL4A and RL4B.
[0037] Of course, the present scheme also has a stop mode, when RL1A and RL1B are disconnected, RL2A and RL2B are disconnected, RL3A and RL4B are disconnected, and RL4A and RL4B are disconnected, the loop of the impedance network is in a disconnected state.
[0038] The basic principle and main features of the present application and the advantages of the present application are shown and described above, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, any reference signs in the claims should not be regarded as limiting the claims.
[0039] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A fully compatible impedance network characterized in that, Comprise: The resistance R1-A1, the resistance R1-A, the switch RL4A connected with the input end; Among them, the other end of the resistance R1-A1 is connected with the resistance R1-A2, the other end of the resistance R1-A2 is connected with the other end of the resistance R1-A, one end of the resistance R2-A, the switch RL3A, the other end of the resistance R2-A is connected with the resistance R2-A1, the resistance R2-A2, the other end of the resistance R2-A2 is connected with the resistance R2-A3, the other end of the resistance R2-A1, the resistance R2-A3 is connected with the resistance R3-A1, the switch RL1A, the resistance R3-A, the other end of the resistance R3-A1 is connected with the resistance R3-A2, the other end of the resistance R3-A2, the other end of the resistance R3-A is connected with the switch RL2A, the other end of the switch RL1A, the other end of the switch RL2A, the other end of the switch RL3A, the other end of the switch RL4A is connected with one end of the inductor L-A, the middle section of the inductor L-A, the other middle section of the inductor L-A, the other end of the inductor L-A respectively, the other end of the inductor L-A is connected with the output end.
2. A fully compatible impedance network according to claim 1, characterized in that: The impedance network is compatible with IEC61000-4-13 and GB17626.13 standards.