Pure resistance load auxiliary device for electromagnetic compatibility detection

Abstract

The utility model relates to the field of electromagnetic compatibility detection, in particular to a pure resistance load auxiliary device for electromagnetic compatibility detection, which comprises an insulating shell and a lamp holder arranged on the insulating shell. The switch controller corresponds to the lamp holder; the first power supply wiring hole L1, the second power supply wiring hole L2 and the third power supply wiring hole L3 are formed in one side of the insulating shell; the fourth power supply wiring hole N is formed in one side of the insulating shell; the wires are connected in the following mode that the lamp holders are connected in series through the wires; one end of the lamp holder is connected with the first power supply wiring hole L1, the second power supply wiring hole L2 and the third power supply wiring hole L3; the other end of the lamp holder is connected with a fourth power supply wiring hole N; and the switch controller is connected in series with the lamp holder. The device can meet power requirements of different electronic products in an electromagnetic compatibility test, realizes switching of a single-phase load and a three-phase load, adjusts and realizes a required load power value, ensures consistency of three-phase resistance values, and avoids the problem of unbalance of load resistance values.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic compatibility performance detection, in particular to a pure resistance load auxiliary device for electromagnetic compatibility detection. Background Art

[0002] In the field of electromagnetic compatibility (EMC) testing, electromagnetic interference (EMI) and electromagnetic susceptibility (EMS) of electronic products are key considerations. With technological advancements, the power and phase load requirements of electronic products are becoming increasingly diverse, placing higher demands on EMC testing. Traditional testing methods often cannot meet the requirements of varying power values ​​and phase loads, especially when switching between three-phase and single-phase loads, lacking flexibility and adaptability. Utility Model Content

[0003] The purpose of the present utility model is to overcome the shortcomings of the existing technology and provide a load device for electromagnetic compatibility testing of electronic products, so as to solve the current problem that it is impossible to simulate the actual load state of the sample (for example, full load or load conditions of different proportions) during the test process to carry out electromagnetic compatibility performance testing.

[0004] In order to achieve the above-mentioned purpose, a pure resistance load auxiliary device for electromagnetic compatibility testing is designed, comprising an insulating housing, and also comprising a plurality of lamp holders arranged on the insulating housing for connecting a pure load; a plurality of switch controllers arranged on the insulating housing and corresponding to each lamp holder; a first power connection hole L1, a second power connection hole L2 and a third power connection hole L3 arranged on one side of the insulating housing, respectively used to connect to the live wire of a single-phase power supply; a fourth power connection hole N arranged on one side of the insulating housing, used to connect to the neutral wire of the power supply; wires for internal connection, wherein the wires are connected in the following manner: the plurality of lamp holders are divided into three groups, each group of lamp holders is independently powered, and the lamp holders in the group are connected in parallel through wires; one end of each group of lamp holders is connected to the first power connection hole L1, the second power connection hole L2 and the third power connection hole L3 respectively through wires; the other end of each group of lamp holders is connected to the fourth power connection hole N through a wire; and each switch controller is connected in series with the corresponding lamp holder through a wire.

[0005] Preferably, the lamp holder is provided with a thread or a bayonet for connecting a tungsten filament lamp, and the lamp holder is an E27 lamp holder or an E14 lamp holder or a bayonet.

[0006] Preferably, a plurality of ventilation holes are provided at the bottom of the insulating shell.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] This device can provide a pure resistance load of predetermined power to meet the power requirements of different electronic products in electromagnetic compatibility testing; a tungsten filament lamp is used as a load element. Since the tungsten filament lamp is a pure resistance element, the resistance value will not change due to heat, thereby ensuring the stability and reliability of the load; the outer shell of the device, including the bottom, is made of insulating material, and the bottom is designed with exhaust holes to help release heat, while avoiding burns to the test interface or site, ensuring the safety of the test and the cleanliness of the site; by combining different interfaces, single-phase and three-phase loads can be switched to meet the needs of electronic products for loads of different phases; by connecting loads of different power values, any required load power value can be adjusted to achieve; each lamp holder is equipped with an independent switch controller, allowing each load to be controlled separately, increasing the flexibility of use; for three-phase loads, the device can ensure that the resistance values ​​of the three phases are completely consistent, avoiding the problem of load resistance imbalance, which is particularly important for electromagnetic compatibility testing of three-phase systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the front view of the device;

[0010] Figure 2 This is the back view of the device;

[0011] Figure 3 This is the internal connection diagram of the device;

[0012] In the figure: 1. Lamp holder; 2. Switch controller; 3. Power wiring hole L1; 4. Power wiring hole L2; 5. Power wiring hole L3; 6. Power wiring hole N; 7. Insulating shell; 8. Bottom vent hole; 9. Wire. DETAILED DESCRIPTION

[0013] In order to make the purpose, principle and structure of the present invention more clear, it is further described below with reference to the accompanying drawings and specific embodiments.

[0014] See also Figure 1 This embodiment provides a pure resistance load auxiliary device for electromagnetic compatibility testing. The device has a rectangular structure and its surface is made of aluminum nitride material with excellent electrical insulation performance and stable physical and chemical properties. This material has a certain heat resistance and is used to protect the shell of the entire device.

[0015] There are 18 lamp holders 1 on the front surface of the insulating shell 7 of the device. The lamp holders 1 are divided into three groups and arranged evenly horizontally. The lamp holder 1 is the user's hand operation part, which is provided with a thread for connecting pure loads such as tungsten filaments. The lamp holder is set to an E27 lamp holder port and can be replaced with an E14 or bayonet lamp holder as needed. The specific number of lamp holders and the number of lamps to be used can be set according to actual needs.

[0016] A corresponding switch controller 2 is provided directly above each lamp holder 1 in the first and second rows, and a corresponding switch controller 2 is provided below each lamp holder 1 in the third row. The switch controller 2 is a user's hand-operated part. Each controller corresponds to a lamp holder and is used to control the start and stop of the load.

[0017] The right side of the device is equipped with power connection holes L1 3, L2 4, L3 5 and N 6. The power connection holes are for user hand operation and are designed in the form of banana plugs. Power connection holes L1 3, L2 4 and L3 5 are used to connect to the live wire of the power supply, and power connection hole N 6 is used to connect to the neutral wire of the power supply.

[0018] See also Figure 2 The bottom of the device is provided with 6 bottom air holes 8, which are divided into two rows for ventilation of the internal structure of the entire device.

[0019] See also Figure 3 This device connects the power wiring holes 3, 4, 5, and 6 to the lamp holder 1 and the switch controller 2 through wires. The specific connection method is: 18 lamp holders are divided into three groups, each group contains 6 lamp holders, and the lamp holders in each group are connected in parallel. One end of each lamp holder in each group is connected to the first power wiring hole L1 3, the second power wiring hole L2 4, and the third power wiring hole L3 5 through a wire, and the other end is connected to the fourth power wiring hole N 6 through a wire. The switch controller 2 corresponding to each lamp holder is connected in series with the corresponding lamp holder 1 through a wire to realize the switching control of the lamp holder.

[0020] The working principle of this utility model is as follows:

[0021] 1. Before testing a sample, calculate the required load power value based on the actual test requirements and load requirements (such as full load or 50% load) of the sample and the requirements of the test item. Select a load with appropriate power and install it on lamp holder 1. If the power of a single load device cannot meet the test requirements, multiple load devices can be arranged horizontally to combine them.

[0022] 2. If the sample is single-phase loaded, generally only the power wiring hole L1 3 and the power wiring hole N 6 are needed. Connect the power wiring hole L1 3 to the live wire of the single-phase power supply and connect the power wiring hole N 6 to the neutral wire of the power supply.

[0023] 3. If the sample is three-phase loaded, the power wiring holes L1 3, L2 4, L3 5 and N 6 will be used. Connect the power wiring holes L1 3, L2 4 and L3 5 to the live wire of the single-phase power supply respectively, and connect the power wiring hole N 6 to the neutral wire of the power supply.

[0024] 4. Before testing, effectively connect the sample to the device via wires through power connection holes L1 3, power connection holes L2 4, power connection holes L3 5 and power connection holes N 6.

[0025] The above description is only a specific implementation method of this utility model, but the protection scope of this utility model is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by this utility model, can make equivalent substitutions or changes based on the technical solutions and new concepts of this utility model, which should be covered by the protection scope of this utility model.

Claims

1. A pure resistance load auxiliary device for electromagnetic compatibility testing, comprising an insulating shell, characterized in that Also includes: A plurality of lamp holders are provided on the insulating housing for connecting pure loads; A plurality of switch controllers are provided on the insulating housing and corresponding to each lamp holder; The first power connection hole L1, the second power connection hole L2 and the third power connection hole L3 provided on one side of the insulating housing are respectively used to connect the live wire of the single-phase power supply; A fourth power connection hole N provided on one side of the insulating housing is used to connect the neutral line of the power supply; Conductors for internal connections where the conductors are connected as follows: Divide the lamp holders into three groups, each group of lamp holders is independently powered, and the lamp holders in the group are connected in parallel through wires; One end of each lamp holder is connected to the first power connection hole L1, the second power connection hole L2 and the third power connection hole L3 through wires; The other end of each lamp holder is connected to the fourth power connection hole N through a wire; Each switch controller is connected in series with the corresponding lamp holder through a wire.

2. A pure resistance load auxiliary device for electromagnetic compatibility testing according to claim 1, characterized in that The lamp holder is provided with a thread or a bayonet for connecting a tungsten filament lamp. The lamp holder is an E27 lamp holder or an E14 lamp holder or a bayonet.

3. A pure resistance load auxiliary device for electromagnetic compatibility testing according to claim 1, characterized in that A plurality of ventilation holes are provided at the bottom of the insulating shell.

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