High-voltage power supply shielding switching device for electromagnetic compatibility test

Abstract

The utility model discloses a high-voltage power supply shielding switching device used for an electromagnetic compatibility test, comprising a switching socket and a wire harness connector, the switching socket comprises a socket insulation isolation part arranged in a socket shielding shell, the insulation isolation part is internally provided with a socket high-voltage lead, and the socket shielding shell is internally provided with a socket high-voltage lead. A high-voltage input port and a high-voltage output port are respectively formed at two ends of the socket high-voltage wire; a cavity is formed in the end part, opposite to the socket high-voltage wire, of the insulation isolation part; the wire harness connector comprises a plug conductive part arranged in a plug insulation isolation part, a socket insulation protection assembly is arranged at the bottom of the plug conductive part, a plug shielding shell is arranged outside the plug insulation isolation part, and a wire harness outer layer is arranged at the top of the plug insulation isolation part and the top of the plug shielding shell. And a cavity matched with the end part of the socket high-voltage lead is arranged in the plug conductive part. The device can effectively realize safe and convenient operation of the high-voltage port, and can realize functions of high-voltage port type conversion, wire harness extension and expansion and the like.

Description

Technical Field

[0001] The utility model relates to a high-voltage power supply shielding adapter for electromagnetic compatibility testing, belonging to the technical field of electromagnetic compatibility testing. Background Art

[0002] With the rapid development of the new energy vehicle industry, high-voltage power supply solutions are widely used in electric vehicles. To further improve the stability of automotive components, their electromagnetic compatibility (EMC) needs to be evaluated. EMC primarily considers whether the test sample can operate stably according to expected performance requirements under specific electromagnetic interference conditions. EMC testing is used to evaluate this. EMC testing primarily includes two components: external emissions and electromagnetic interference immunity. Emission testing is typically conducted in an anechoic chamber. GB 18655 or CISPR 25 requires that ambient noise levels be at least 6dB below the limit. To improve safety and reduce mutual coupling between high-voltage and low-voltage lines and communication lines, high-voltage signals typically use shielded cables. Shielded cables are used for high-voltage power supply within anechoic chambers. To address the issues of extending the high-voltage power supply channel and port matching within the anechoic chamber, a universal intermediate switching device is required. This device must also meet safety requirements. Therefore, a shielded high-voltage power supply switching device for EMC testing is needed. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a high-voltage power supply shielding adapter for electromagnetic compatibility testing, which provides a shielding path for the extension, conversion and port expansion of high-voltage shielding lines and improves operational safety.

[0004] In order to solve the above problems, the utility model provides a high-voltage power supply shielding adapter device for electromagnetic compatibility testing, which includes an adapter socket and a wiring harness connector that are plugged into each other. The adapter socket includes a socket insulation isolation part arranged in the socket shielding shell, a socket high-voltage wire is provided in the insulation isolation part, and the two ends of the socket high-voltage wire respectively constitute a high-voltage input port and a high-voltage output port. The insulation isolation part is provided with a cavity relative to the end of the socket high-voltage wire, and an elastic fastening component for the end of the socket high-voltage wire is provided in the cavity, and a socket insulation protection component is provided on the outside of the cavity; the wiring harness connector includes a plug conductive part arranged in the plug insulation isolation part, a socket insulation protection component is provided at the bottom of the plug conductive part, a plug shielding shell is provided outside the plug insulation isolation part, and the plug shielding shell is fixed in the socket shielding shell by a plug shielding layer fastening component, the plug insulation isolation part and the top of the plug shielding shell are provided with a wiring harness outer layer, a cavity is provided in the plug conductive part to match the end of the socket high-voltage wire, and the inner wall of the cavity is provided with a plug elastic fastening component, and the plug conductive part and the end of the socket high-voltage wire are nested and tightly connected with each other.

[0005] Preferably, the socket shielding shell is a metal shielding shell with a thickness greater than 6 times the skin depth of the metal material used, so as to achieve a shielding effectiveness greater than 50dB within the target frequency range. The electrical conductivity of the metal material used is greater than 10MS / m.

[0006] Preferably, the socket shielding shell is made of tin-plated steel, which can achieve higher interface transfer impedance under relatively low pressure and improve the problem that the transfer impedance of the conductive connection interface increases significantly with material aging.

[0007] The insulating isolation part is used to prevent high voltage breakdown or induced arc, etc., and preferably uses a material with a body deformation of less than 1‰, a melting point higher than 150°C, and an insulation resistance greater than 5MΩ.

[0008] Preferably, the diameter of the high-voltage wire of the socket is greater than 10 mm. 2 The high-voltage wire of the socket is made of high-conductivity, non-ferromagnetic metal material with a conductivity greater than 15MS / m and a resistivity temperature coefficient less than 0.0005.

[0009] Preferably, the elastic fastening component has a thickness of less than 0.1 mm, and is a fastening component between the socket shielding shell and the surface of the socket high-voltage wire to provide a contact pressure of not less than 5 MPa, and the contact impedance is reduced to below 1 mΩ.

[0010] Preferably, the socket insulation protection assembly is connected to the socket insulation isolation part through a thread. The socket insulation protection assembly is a detachable insulation cover used to protect operators from contacting the conductive core of the high-voltage transmission line.

[0011] Preferably, the thickness of the socket insulation protection component is greater than 3 mm, and the insulation resistance is greater than 5 MΩ.

[0012] Preferably, the conductive part of the plug is greater than 10 mm away from the end and is made of a metal conductor with an electrical conductivity greater than 10 MS / m.

[0013] The insulation resistance of the insulating part of the plug is greater than 5MΩ.

[0014] Preferably, the thickness of the plug shielding shell is greater than 6 times the skin depth of the material used, so as to obtain a shielding effectiveness of more than 50 dB and adopt a high-conductivity, non-ferromagnetic metal conductor.

[0015] The plug elastic fastening assembly is used to provide higher fastening pressure and achieve lower interface impedance.

[0016] The outer layer of the wiring harness is an insulating layer with an insulation resistance greater than 5MΩ to avoid contact with the human body.

[0017] The utility model can effectively solve the problems of extension, conversion, port expansion and the like of high-voltage shielded power supply lines, and can also prevent interference from continuous electromagnetic waves and transient pulse fields.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Realize the applications of port transfer and port expansion of high-voltage wire harnesses under shielding conditions.

[0020] 2. Avoid the mutual coupling between high-voltage wiring harness and low-voltage wiring harness and high and low voltage of communication wiring harness.

[0021] 3. During the wiring harness transfer operation, the possible contact between the connector and the live parts of the wiring harness and the external conductor is avoided, effectively protecting the safety of the operator.

[0022] 4. Can adapt to the mutual conversion of various high-voltage ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of the adapter socket in the high-voltage power supply shielding adapter provided by the utility model;

[0024] Figure 2 A cross-sectional view of a connector device in a high-voltage power supply shielding adapter provided by the present invention;

[0025] Figure 3 It is a schematic diagram of a high-voltage input port and a high-voltage output port;

[0026] Figure 4 This is an application diagram of Example 1;

[0027] Figure 5 This is a port diagram of Example 2. DETAILED DESCRIPTION

[0028] In order to make the present invention more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-3As shown, a high-voltage power supply shielding adapter device for electromagnetic compatibility testing provided by the present invention includes an adapter socket and a wiring harness connector that are plugged into each other. The adapter socket includes a socket insulating isolation part 2 provided in a socket shielding shell 1, a socket high-voltage wire 3 is provided in the insulating isolation part 2, and the two ends of the socket high-voltage wire 3 respectively constitute a high-voltage input port 12 and a high-voltage output port 13. The insulating isolation part 2 is provided with a cavity relative to the end of the socket high-voltage wire 3, and an elastic fastening component 4 for the end of the socket high-voltage wire 3 is provided in the cavity, and a socket insulation protection component 5 is provided on the outside of the cavity; The wiring harness connector includes a plug conductive portion 6 housed within a plug insulating isolation portion 7. A receptacle insulating protection assembly 5 is positioned at the bottom of the plug conductive portion 6. A plug shielding shell 8 is positioned outside the plug insulating isolation portion 7, secured to the receptacle shielding shell 1 by a plug shielding layer fastening assembly 10. A wiring harness outer layer 11 is positioned atop the plug insulating isolation portion 7 and the plug shielding shell 8. The plug conductive portion 6 defines a cavity that mates with the end of the receptacle high-voltage conductor 3. The inner wall of this cavity is secured with a plug elastic fastening assembly 9. The plug conductive portion 6 and the end of the receptacle high-voltage conductor 3 are nested and tightly connected. When the wiring harness connector is inserted into a conversion receptacle, the plug conductive portion 6 nests and tightly connects with the receptacle high-voltage conductor 3, achieving a secure connection thanks to the high elastic force between the plug elastic fastening assembly 9 and the elastic fastening assembly 4. The plug insulating isolation portion 7 and the receptacle insulating isolation portion 2 intersect to isolate the receptacle high-voltage conductor 3 and the plug conductive portion 6 from the receptacle shielding shell 1. The receptacle shielding shell 1 and the plug shielding shell 8 are secured together by the elastic fastening assembly 4 and the plug shielding layer fastening assembly 10.

[0030] The receptacle shielding shell 1 is a metal shielding shell, which can be made of a high-conductivity metal material such as steel, copper, or aluminum. Preferably, the conductivity is greater than 10MS / m. Preferably, the thickness is greater than six times the skin depth of the corresponding material to achieve a shielding effectiveness greater than 50dB within the target frequency range. Preferably, tin-plated steel is used to achieve high interface transfer impedance at relatively low pressures, and to mitigate the problem of significant increase in transfer impedance at the conductive connection interface with material aging.

[0031] The socket insulation portion 2 is made of a hard, slightly elastic insulating material, used to isolate the socket shielding shell 1 from the socket high-voltage terminal 3 to prevent high-voltage breakdown or induced arcing. Preferably, the material has a bulk deformation of less than 1‰. Preferably, the thermal expansion coefficient is less than 1‰. Preferably, the melting point is greater than 150°C. Preferably, the insulation resistance is greater than 5MΩ.

[0032] The socket high voltage wire 3 is made of high conductivity, non-ferromagnetic metal material. Preferably, the wire diameter is greater than 10mm. 2The socket high-voltage wire 3 includes two groups of positive and negative electrodes. Preferably, the electrical conductivity is greater than 15MS / m. Preferably, the temperature coefficient of resistivity is less than 0.0005.

[0033] The elastic fastening component 4 is a fastening component for the surface of the socket shielding shell 1 and the socket high-voltage wire 3, providing a contact pressure of not less than 5 MPa and reducing the contact impedance to less than 1 mΩ. Preferably, the thickness is less than 0.1 mm.

[0034] The socket insulation protection assembly 5 is a removable insulating cover that protects operators from contact with the conductive cores of the high-voltage transmission line. Preferably, the insulating cover is threadedly connected to the socket insulation portion 2. Preferably, the insulation layer has a thickness greater than 3 mm and an insulation resistance greater than 5 MΩ.

[0035] The conductive portion 6 of the plug is a metal conductor with a conductivity greater than 10MS / m. Preferably, the conductive portion is greater than 10mm away from the port.

[0036] The plug insulating isolation portion 7 is an insulating isolation between the plug conductive portion 6 and the plug shielding shell 8. Preferably, the insulation resistance is greater than 5MΩ.

[0037] The plug shielding shell 8 is a high-conductivity, non-ferromagnetic metal conductor, and preferably has a thickness greater than six times the skin depth of the material used to achieve a shielding effectiveness of more than 50 dB.

[0038] The plug elastic fastening assembly 9, like the elastic fastening assembly 4, is used to provide a higher fastening pressure and achieve a lower interface impedance.

[0039] The plug shielding layer fastening assembly 10 is used for fastening the shielding layer to the socket shielding shell 1 .

[0040] The outer layer 11 of the wiring harness is an insulating layer with an insulation resistance greater than 5 MΩ to avoid contact with the human body.

[0041] The high-voltage input port 12 is a port for inputting high-voltage power and includes a group of input ports consisting of "+" and "-" poles.

[0042] The high voltage output port 13 is a port for outputting high voltage power, and includes one or more groups of output ports of different specifications and models, each consisting of a "+" and a "-" pole. Preferably, the "+" and "-" poles are protected against reverse connection.

[0043] The positive electrode port 14 includes the “+” of the high-voltage input port 12 and the high-voltage output port 13 , and is internally connected by a high-conductivity high-voltage wire in a low-impedance manner.

[0044] The negative electrode port 15 includes the negative pole of the high voltage input port 12 and the high voltage output port 13 , and is internally connected by a high-conductivity high voltage wire in a low-impedance manner.

[0045] Example 1

[0046] 1 set of high-voltage plugs (the high-voltage plugs have an input interface Ⅰ and an output interface Ⅱ, both of which include a high-voltage conductive layer 16, an inner insulating layer 17, a shielding layer 18, and an outer insulating layer 19 from the inside to the outside) and two high-voltage sockets according to Figure 4 The solution shown is used for connection to avoid voltage breakdown problems that may be caused by 1000V high voltage power supply.

[0047] The device realizes the continuity of the shielding structure of the high-voltage shielding line.

[0048] Example 2

[0049] like Figure 5 As shown in the figure, input interface I is a set of high-voltage ports including positive and negative poles. The positive and negative poles use anti-reverse sockets.

[0050] The output interface II is a combination of one or more types of ports. In this embodiment, a type A interface and a type B interface with an anti-reverse socket are used.

[0051] One set of high voltage signals can be output through the A-type interface, and one set of high voltage signals can also be output through the B-type interface.

Claims

1. A high voltage power supply shielding adapter for electromagnetic compatibility testing, characterized in that: The invention comprises a transfer socket and a wiring harness connector that are plugged into each other, wherein the transfer socket comprises a socket insulating isolation portion (2) arranged in a socket shielding shell (1), a socket high-voltage wire (3) is arranged in the insulating isolation portion (2), and two ends of the socket high-voltage wire (3) respectively constitute a high-voltage input port (12) and a high-voltage output port (13), the insulating isolation portion (2) is provided with a cavity relative to the end of the socket high-voltage wire (3), an elastic fastening component (4) for the end of the socket high-voltage wire (3) is provided in the cavity, and a socket insulating protection component (5) is provided outside the cavity; The wiring harness connector comprises a plug conductive part (6) arranged in a plug insulating isolation part (7), a socket insulating protection component (5) is provided at the bottom of the plug conductive part (6), a plug shielding shell (8) is provided outside the plug insulating isolation part (7), the plug shielding shell (8) is fixed in the socket shielding shell (1) through a plug shielding layer fastening component (10), a wiring harness outer layer (11) is provided on the top of the plug insulating isolation part (7) and the plug shielding shell (8), a cavity is provided in the plug conductive part (6) to match the end of the socket high-voltage wire (3), the inner wall of the cavity is provided with a plug elastic fastening component (9), and the plug conductive part (6) and the end of the socket high-voltage wire (3) are nested and tightly connected with each other.

2. The high-voltage power supply shielding adapter according to claim 1, characterized in that: The socket shielding shell (1) is a metal shielding shell, the thickness of which is more than 6 times the skin depth of the metal material used.

3. The high-voltage power supply shielding adapter according to claim 1, wherein: The socket shielding shell (1) is made of tin-plated steel.

4. The high-voltage power supply shielding adapter according to claim 1, wherein: The diameter of the socket high-voltage wire (3) is greater than 10 mm 2 The socket high voltage wire (3) is made of high conductivity, metallic non-ferromagnetic material, with a conductivity greater than 15MS / m and a resistivity temperature coefficient less than 0.0005.

5. The high-voltage power supply shielding adapter according to claim 1, wherein: The thickness of the elastic fastening component (4) is less than 0.1 mm.

6. The high-voltage power supply shielding adapter according to claim 1, wherein: The socket insulation protection component (5) is connected to the socket insulation isolation part (2) via threads.

7. The high-voltage power supply shielding adapter according to claim 1, wherein: The thickness of the socket insulation protection component (5) is greater than 3 mm.

8. The high-voltage power supply shielding adapter according to claim 1, wherein: The conductive part (6) of the plug is greater than 10 mm away from the end.

9. The high-voltage power supply shielding adapter according to claim 1, wherein: The thickness of the plug shielding shell (8) is greater than 6 times the skin depth of the material used.

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