CN217062724U

CN217062724U - Power isolation socket

Info

Publication number: CN217062724U
Application number: CN202220747049.3U
Authority: CN
Inventors: 储宁; 董琦
Original assignee: Jinan Fenghou Electronic Technology Co ltd
Current assignee: Jinan Fenghou Electronic Technology Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-26
Anticipated expiration: 2032-04-01

Abstract

The utility model provides a power isolation socket adopts the power isolation socket of the EMI wave filter of two-stage filter structure, can effectively prevent revealing of consumer electromagnetic interference and data information, can effectively prevent electromagnetic conduction information leakage in the comparatively important occasion of data information safety, and protection data safety can reduce the conduction leakage transmission that information equipment spread into power network into, prevents electromagnetic leakage and cross induction coupling between the power cord.

Description

Power isolation socket

Technical Field

The utility model belongs to the technical field of the security of power is secret, concretely relates to power isolation socket.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

With the development of electronic information technology, human society has not been able to leave electronic information and networks, and the problem of potential safety hazard of information equipment is accompanied, so that the problems are paid unprecedented attention nowadays, more scholars begin to research electromagnetic leakage emission, many organizations build information protection systems to prevent data and information from leaking through the internet, and perform physical isolation when more methods are adopted, but due to insufficient experience and knowledge or limitation of equipment conditions, the key red equipment and the key black equipment share the same power supply, so that the potential safety hazard of information leakage exists.

The red and black power isolation socket can meet the requirement that the red and black equipment supplies power independently without transforming an electric power system, but the existing red and black power socket still has the problems of electromagnetic interference of electric equipment and data information leakage, has poor performance, greatly reduces the safety of data, increases the cost frequently due to the size and the price of the existing used filter, and has low safety.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provided a power isolation socket, the utility model discloses can more effectually prevent consumer electromagnetic interference and data information's leakage, carry out optimal design to the wave filter, improve the performance of wave filter and provide a supply socket that the safety configuration is reasonable.

According to some embodiments, the utility model discloses a first aspect provides a power isolation socket, adopts following technical scheme:

a power isolation socket comprises a two-stage EMI filter and a base, wherein the two-stage EMI filter is positioned at one end of the base, the other end of the base is provided with a plurality of rows of power jacks, and one output end of one end of the two-stage EMI filter is connected with the power jacks in series;

the two-stage EMI filter comprises a capacitance resistor and an active operational amplifier and adopts a two-stage filter circuit structure.

Furthermore, the other output end of one end of the EMI filter is connected in series with one end of the overcurrent protector.

And the other end of the overcurrent protector is connected in series with a power jack.

And the input end of the other end of the EMI filter is connected with a socket line.

The receptacle wire has a shielding layer that is connected to the EMI filter housing.

The switch is connected in series with the power jack, and the resistor and the light-emitting diode are also connected in series on the circuit connected in series with the power jack.

The two-stage EMI filtering structure is formed by connecting two EMI filters.

The two EMI filters share a differential mode capacitance.

The two-stage EMI filter circuit structure has two input ends, two output ends and a grounding end.

The two EMI filters are connected in series.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a socket is kept apart to EMI wave filter's of two-stage filter structure power can prevent effectively that consumer electromagnetic interference and data information from revealing, can prevent effectively that electromagnetism conduction information from revealing, protection data safety in the comparatively important occasion of data information safety. The transmission leakage of the information equipment transmitted into the power supply network can be reduced, interference signals carried in the power supply are reduced, electromagnetic leakage and cross inductive coupling between power lines are prevented, and the requirement of independent power supply of the red and black equipment can be met without transforming a power system.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a schematic view of the power isolation socket of the present invention;

figure 2 is the utility model discloses a two-stage EMI wave filter structure

Fig. 3 is an EMI filter structure of the present invention;

the specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. For persons skilled in the art, the specific meanings of the above terms in the present invention can be determined according to specific situations, and should not be construed as limiting the present invention.

Example 1

The utility model provides a power isolation socket, as shown in figure 1, comprising a two-stage EMI filter 3 and a base 2, wherein the two-stage EMI filter 3 is positioned at one end of the base 2, the other end of the base 2 is provided with a plurality of rows of power jacks 7, and one output end of one end of the two-stage EMI filter 3 is connected with the power jacks 7 in series; the two-stage EMI filter 3 comprises a capacitor resistor and an active operational amplifier, adopts a two-stage filter circuit structure, and further comprises an upper cover 1, wherein the upper cover 1 can be fixed on a socket base through screws.

As shown in fig. 3, K1 is a common mode choke coil, Cy is a common mode capacitor, and the common mode inductor and the common mode capacitor form an L-type low pass filter opposite to the PE line, so as to filter out common mode interference of the L line and the N line with respect to the PE line. L1 and L2 are differential mode inductors, Cx is a differential mode capacitor, and the differential mode capacitor and the differential mode inductor form a pi-type low-pass filter circuit which can filter differential mode interference between LN lines.

As shown in fig. 1, the other output terminal of one end of the EMI filter 3 is connected in series with one end of an overcurrent protector 6, the other end of the overcurrent protector 6 is connected in series with a power jack 7, the input terminal of the other end of the EMI filter 3 is connected with a socket wire 5, and the socket wire is provided with a general plug for conveniently connecting an external circuit; the socket line is provided with a shielding layer 4, the shielding layer 4 is connected with the shell of the EMI filter 3, the power jack 7 is connected with a switch 8 in series, and a resistor 9 and a light-emitting diode 10 are further connected on the circuit connected with the switch 8 and the power jack 7 in series.

The two-stage EMI filtering structure is formed by connecting two EMI filters 3, the two EMI filters 3 share a differential mode capacitor, the two EMI filters are provided with two input ends, two output ends and a grounding end, and the two EMI filters 3 are connected in series.

As shown in fig. 3, the EMI filter structure has two input terminals, two output terminals, and a ground terminal. Cx is a differential mode filter capacitor, and the differential mode capacitance value is 1 uF. Cy is the common-mode filter capacitance, and the common-mode capacitance value is 68 nF. L, L ₁ 、L ₂ The inductance is 46mH for differential mode inductance. Cx and Cx together form a differential mode low-pass filter, which can filter out differential mode interference signals between the phase line and the ground line above the cut-off frequency. The Cy and the zero line jointly form a common-mode low-pass filter, and common-mode interference signals entering the phase line and the zero line above the cut-off frequency can be filtered.

Two ends of a first capacitor Cx1 in the filter structure are respectively connected with the inlet ends of a live wire and a zero wire and are connected to the input end of a common mode current-suppressing ring K1 in parallel; the output end of the common mode current-suppressing coil K1 is connected with one end of the first inductor L1 and one end of the second inductor L2 respectively; the other end of the first inductor L1 is respectively connected with one end of the second capacitor Cx2 and one end of the third capacitor Cy1, and is simultaneously connected with the live wire output end; the other end of the second inductor L2 is respectively connected with the other end of the second capacitor Cx2 and one end of a fourth capacitor Cy2, and is simultaneously connected with the output end of the zero line; the other terminal of the third capacitor Cy1 is connected to the other terminal of the fourth capacitor Cy2, which is also connected to ground.

The differential mode capacitor and the common mode capacitor need to be subjected to 1500-1700 VDC one-minute withstand voltage test. The core material of the inductive device is ferrite.

The filter is essentially an active filter, and the structure of the active filter mainly comprises a capacitor resistor and an active operational amplifier. An Active EMI Filter (AEF) is based on a feedback compensation principle, acquires the magnitude and the phase of an interference signal, generates a compensation signal with the same magnitude and the opposite phase through an operational amplifier, and eliminates the influence of the interference signal after the compensation signal is superposed with the interference signal so as to realize dynamic compensation and adjustment. The essence of the AEF is to provide an internal loop with very low impedance to noise sources.

In a situation where electromagnetic interference is severe, a single-stage EMI filter cannot meet the requirement of electromagnetic interference suppression, and a multi-stage EMI filter structure is required, where a circuit structure of the two-stage EMI filter is shown in fig. 3.

The two-stage EMI filter is formed by connecting two EMI filters as shown in fig. 2, while omitting unnecessary differential mode filter capacitance Cx2 to reduce the cost.

The two stages of filters can share one differential mode capacitor to reduce cost. The adoption of the second-level EMI filter can have better filtering effect. And as the frequency increases, the insertion loss difference between the two-stage filtering structure and the single-pole filter also increases.

When the power supply device is used, the power plug of the socket is connected to a public power supply, the power line of the information equipment is connected to any power jack on the socket, and the power line of the socket is restrained by the filter, so that the information equipment can be effectively prevented from transmitting and transmitting information into a public power supply line through the power line, and the conventional power supply is not influenced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A power isolation socket is characterized by comprising two stages of EMI filters and a base, wherein the two stages of EMI filters are positioned at one end of the base, a plurality of rows of power jacks are arranged at the other end of the base, and one output end of one end of each of the two stages of EMI filters is connected with the power jacks in series;

the two-stage EMI filter comprises a capacitor resistor and an active operational amplifier and adopts a two-stage filter circuit structure.

2. The isolated power outlet of claim 1 wherein the other output terminal of the one terminal of the EMI filter is connected in series with one terminal of the overcurrent protector.

3. The isolated power outlet of claim 2, wherein the other end of the over-current protector is connected in series with the power jack.

4. The isolated power outlet of claim 1 wherein the other end of the EMI filter has an input connected to a line outlet.

5. An isolated power outlet according to claim 4, wherein said outlet is provided with a shield, said shield being connected to the EMI filter housing.

6. The isolated power outlet of claim 1, wherein a switch is connected in series with the power jack, and a resistor and a light emitting diode are connected in series with a series circuit of the switch and the power jack.

7. The isolated power outlet of claim 1 wherein said two-stage EMI filtering arrangement is comprised of two EMI filter connections.

8. An isolated power outlet according to claim 7, wherein said two EMI filters share a differential mode capacitor.

9. The isolated power outlet of claim 7, wherein said two EMI filters have two inputs, two outputs and a ground.

10. The isolated power outlet of claim 7 wherein said two EMI filters are connected in series.