High-performance rectangular filtering plug

Abstract

The utility model relates to a high-performance rectangular filtering plug, and belongs to the technical field of electromagnetic compatibility. According to the utility model, a filtering structure is additionally arranged outside the rectangular plug equipment, and the filtering module adopts a high-performance inductor made of ultracrystalline and nickel-zinc materials, so that power supply interference can be effectively inhibited; compared with a non-filtering product, the overall dimension of the filter provided by the utility model realizes high-performance filtering only by increasing the thickness of the rectangular plug; the filtering module can be close to the equipment in the shortest distance and reliably grounded.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic compatibility technology, specifically relating to a high-performance rectangular filter plug. Background Technology

[0002] Rectangular plugs are used in conjunction with sockets. Due to their rectangular shape, they can provide maximum space utilization in different devices. They also have advantages such as simple locking method, low contact resistance, trapezoidal shell to prevent misinsertion, strong impact and vibration resistance, and the ability to select appropriate coatings according to different corrosive environments. They are mainly used in blind-insertion situations between devices, such as in the military industry, such as aviation, aerospace, and weaponry, as well as other electronic and electrical equipment markets.

[0003] With the increasing number of system slots (boards) and PCI connections, more and more connectors are being used in high-speed, high-end applications. The drawbacks of previously focusing only on circuit board layout, space, and size during selection, while neglecting electrical performance, are becoming increasingly apparent. In the military and other electronic equipment markets with stringent electromagnetic compatibility requirements, the demand for plugs with filtering functions is growing, and the specifications are becoming increasingly demanding. Adding filtering functionality to the internationally standard rectangular electrical connector can effectively solve electromagnetic compatibility issues and better meet customer needs.

[0004] To solve practical problems encountered by equipment in electromagnetic compatibility testing, it is often necessary to combine the electrical performance parameters of the customer's products and the frequency exceeding the standard to carry out targeted high-performance filtering.

[0005] Conventional rectangular sockets and plugs lack filtering capabilities. While some connectors and rectangular sockets now incorporate filtering features to meet market demands, the electromagnetic environment is becoming increasingly complex and interference is growing due to designers not considering electromagnetic interference during the design phase, as well as the high integration and informatization of internal electrical equipment and the influence of high-frequency devices. During electromagnetic compatibility testing according to national and military standards, the following deficiencies were discovered:

[0006] Due to space constraints within the internal equipment, the socket filtering space is small or nonexistent, making it impossible to perform filtering design effectively.

[0007] Due to significant internal interference, a single socket filter cannot effectively filter out the interference, making it difficult to meet customer needs.

[0008] Due to grounding, secondary interference, and spatial shielding, the filtering effect inside the equipment will be severely reduced. Utility Model Content

[0009] (a) Technical problems to be solved

[0010] The technical problem to be solved by this utility model is: to design a filter plug that does not occupy the internal space of the equipment, has a compact structure, high reliability, and good filtering performance, so as to effectively reduce conducted interference in the low-frequency to high-frequency range, and at the same time suppress the spatial radiation interference of the power line.

[0011] (II) Technical Solution

[0012] To solve the above-mentioned technical problems, this utility model provides a high-performance rectangular filter plug, including a rectangular plug 1 and a filter module 2. The rectangular plug 1 and the filter module 2 are connected by a flexible cable. The filter module 2 can filter out noise interference on the power supply. The filter module 2 is fixed on the rectangular plug 1 through the mounting hole 3.

[0013] Preferably, the filtering module consists of an EMI filter circuit.

[0014] Preferably, the EMI filter circuit is composed of a filter circuit consisting of a common-mode inductor, a common-mode capacitor, and a differential-mode capacitor.

[0015] Preferably, the EMI filter circuit includes common-mode single-phase inductors La and Lb, differential-mode capacitors C1, C2, and C5, and common-mode capacitors C3 and C4; the two ends of C1 are input terminals and are connected to the input terminal of La, C2 is connected to the output terminal of La, and C3 and C4 are connected in series and then in parallel with C2 and connected to the input terminal of Lb, C3 and C4 are grounded, and C5 is connected to the output terminal of Lb.

[0016] Preferably, the common-mode single-phase inductor La can suppress high-frequency common-mode interference generated in the power supply and is made of microcrystalline material; the common-mode single-phase inductor Lb can suppress low-frequency common-mode interference generated in the power supply and is made of nickel-zinc material.

[0017] Preferably, the common-mode capacitors C3 and C4 are 1μF in size, which can suppress common-mode interference in the power supply.

[0018] Preferably, the differential mode capacitors C1, C2, and C5 are 10μF in size, which can suppress differential mode interference in the power supply.

[0019] Preferably, C1, C2 and La form a first-stage filter network to filter out some differential and common-mode interference in the power supply; C3, C4, C5 and Lb form a second-stage filter network to filter out the remaining differential and common-mode interference in the power supply.

[0020] Preferably, this rectangular filter plug is used in the field of electromagnetic compatibility technology.

[0021] This invention also provides an electromagnetic compatibility testing device using the rectangular filter plug.

[0022] (III) Beneficial Effects

[0023] The advantages of this utility model are as follows:

[0024] 1. A filtering design is adopted on the rectangular plug to solve the problem of insufficient internal space for customers;

[0025] 2. Using external filtering can prevent the drawbacks of reduced filtering performance due to secondary interference or poor spatial shielding inside the equipment.

[0026] 3. No need to change the equipment component list; simply increase the thickness of the rectangular plug to improve filtering performance and meet national and military standards.

[0027] 4. High-performance inductors made of microcrystalline and nickel-zinc materials have good filtering performance and small size. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the high-performance rectangular filter plug.

[0029] Figure 2 This is a circuit block diagram of the filter module of this utility model;

[0030] Figure 3 This is a schematic diagram of the filter module circuit of this utility model. Detailed Implementation

[0031] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0032] refer to Figure 1 The present invention provides a high-performance rectangular filter plug including a rectangular plug 1 and a filter module 2. The rectangular plug 1 and the filter module 2 are connected by a flexible cable. The filter module 2 is used to filter out noise interference on the power line. The filter module 2 is fixed on the rectangular plug 1 through a mounting hole 3.

[0033] The block diagram of the filter module circuit is as follows: Figure 2 As shown, by Figure 2 As can be seen, the filtering module mainly consists of an EMI filter circuit. This EMI filter circuit is primarily composed of a common-mode inductor, a common-mode capacitor, and a differential-mode capacitor. The circuit schematic is shown below. Figure 3 As shown, it includes common-mode single-phase inductors La and Lb, differential-mode capacitors C1, C2, and C5, and common-mode capacitors C3 and C4; the two ends of C1 are the input terminals and are connected to the input terminals of La, C2 is connected to the output terminal of La, and C3 and C4 are connected in series and then in parallel with C2 and connected to the input terminal of Lb, C3 and C4 are grounded, and C5 is connected to the output terminal of Lb.

[0034] The common-mode single-phase inductor La is used to suppress high-frequency common-mode interference generated in the power supply line. It uses high-performance microcrystalline material and features very low core loss, very high saturation flux density, high permeability, and good magnetic shock stability. The common-mode single-phase inductor Lb is used to suppress low-frequency common-mode interference generated in the power supply circuit. It uses nickel-zinc material and features high permeability, high saturation flux density, and low loss, primarily suppressing low-frequency common-mode interference. The differential and common-mode capacitors used have high capacitance stability and low dielectric loss. Common-mode capacitors C3 and C4 are 1μF in size and are used to suppress common-mode interference in the power supply; differential-mode capacitors C1, C2, and C5 are 10μF in size and are used to suppress differential-mode interference in the power supply. The connection relationship of the filter network composed of inductors and capacitors is as follows: Figure 3 As shown, the power supply interference noise first passes through the first-stage filter network composed of C1, C2 and La, which filters out most of the differential and common-mode interference in the power supply; then it passes through the second-stage filter network composed of C3, C4, C5 and Lb, which filters out the remaining differential and common-mode interference in the power supply.

[0035] As can be seen, in order to meet the usage requirements of customers in specific structural spaces, this utility model adopts a structure that adds a filter to the outside of the rectangular plug device; the filter module uses a high-performance inductor made of microcrystalline and nickel-zinc materials, which can effectively suppress power supply interference; compared with the non-filtered product, the external dimensions of this utility model achieve high-performance filtering simply by increasing the thickness of the rectangular plug; the filter module can be approached to the device with the shortest distance and reliably grounded.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high performance rectangular filter plug, characterized by, Including rectangular plug (1) and filter module (2), rectangular plug (1) is connected with filter module (2) through flexible cable;Filter module (2) can filter out the spurious interference on power supply;Filter module (2) is fixed on rectangular plug (1) through mounting hole (3).

2. The rectangular filter plug of claim 1, wherein, The filter module is composed of an EMI filter circuit.

3. The rectangular filter plug of claim 2, wherein, The EMI filter circuit is composed of a filter circuit composed of common-mode inductance, common-mode capacitance and differential-mode capacitance.

4. The rectangular filter plug of claim 3, wherein, The EMI filter circuit includes common-mode single-phase inductance La, Lb, differential-mode capacitance C1, C2, C5, and common-mode capacitance C3, C4;The two ends of C1 are input terminals, and are connected to the input terminals of La, C2 is connected to the output terminals of La, C3 and C4 are connected in series and then connected in parallel with C2, and are connected to the input terminals of Lb, C3 and C4 are grounded, and C5 is connected to the output terminals of Lb.

5. The rectangular filter plug of claim 4, wherein, The common-mode single-phase inductance La can suppress the high-frequency common-mode interference generated in the power supply, and adopts supermicrocrystalline material;Common-mode single-phase inductance Lb can suppress the low-frequency common-mode interference generated in the power supply, and adopts nickel-zinc material.

6. The rectangular filter plug of claim 5, wherein, The common-mode capacitance C3, C4 is 1 μF, which can suppress the common-mode interference in the power supply.

7. The rectangular filter plug of claim 6, wherein, The differential-mode capacitance C1, C2, C5 is 10 μF, which can suppress the differential-mode interference in the power supply.

8. The rectangular filter plug of claim 7, wherein, C1, C2 and La constitute a first-stage filter network, which filters out part of the differential-mode and common-mode interference in the power supply;C3, C4, C5 and Lb constitute a second-stage filter network, which filters out the remaining differential-mode and common-mode interference in the power supply.

9. The rectangular filter plug of claim 1, wherein, The rectangular filter plug is applied in the field of electromagnetic compatibility technology.

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