CN217562971U - Adapter type electromagnetic compatible filter - Google Patents

Abstract

The utility model discloses an adapter type electromagnetic compatibility wave filter, through increase the wave filter circuit on the input wire rod of electron electrical apparatus, the circuit board that need not to change the product carries out circuit filtering, electromagnetic compatibility wave filter includes first filter circuit, second filter circuit and auxiliary filter circuit, the adapter uses with the cooperation of electromagnetic compatibility wave filter, make it have good equilibrium and have certain decay ability at the high frequency, auxiliary filter circuit can provide the high frequency processing characteristic for the output of product, make whole frequency channel have better wave filter throughput. The magnetic ring buckle is arranged on a power line of the adapter and can well inhibit high-frequency noise, the electromagnetic compatibility filter can enable indoor equipment to work and has the functions of resisting interference and optimizing the environment, meanwhile, the application range of the electromagnetic compatibility filter is widened, the structure is simple, the use is convenient and fast, and therefore the interference inhibiting capability of a complete electromagnetic compatibility effect wide frequency domain is achieved.

Description

Adapter type electromagnetic compatibility filter

Technical Field

The utility model belongs to the technical field of the wave filter, especially, relate to an adapter type electromagnetic compatibility wave filter.

Background

At present, many electronic products are prone to have problems in the link of electromagnetic compatibility, the main reason is that product filtering is insufficient, and later electromagnetic compatibility is adjusted, and great changes such as matching of PCBs, wires and electronic components are often required, so that the time of products on the market is influenced. In addition, the interference is large in many practical household appliances at present, so that the electromagnetic compatibility environment is more and more complicated, in order to solve the problem, a filter technology is generally adopted to be applied to the interior of a product, so that the requirement of the whole electromagnetic compatibility cannot be met, even the whole electricity utilization environment is influenced,

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides an adapter type electromagnetic compatibility wave filter realizes simply conveniently solving the influence of whole product to electromagnetic compatibility ability through the replacement wire rod to solve the problem of proposing among the above-mentioned background art.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides an adapter type electromagnetic compatibility filter, including first power plug, first power cord, electromagnetic compatibility filter, second power cord, magnetic ring knot and second power plug, first power plug passes through the input of first power cord connection electromagnetic compatibility filter, electromagnetic compatibility filter's output passes through the second power cord connection magnetic ring knot, the magnetic ring knot with the second power plug connection;

the electromagnetic compatibility filter include with the first filter circuit that the input is connected, with the second filter circuit that first filter circuit connects and connect second filter circuit's supplementary filter circuit, first filter circuit includes parallelly connected first electric capacity, first common mode inductance and second electric capacity, second filter circuit includes parallelly connected second common mode inductance, third electric capacity and fourth electric capacity, the second electric capacity with the third electric capacity is parallelly connected, supplementary filter circuit includes parallelly connected three inductance, supplementary filter circuit connects the output.

As a further improvement of the above technical solution, the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are all safety capacitors.

As a further improvement of the above technical solution, the first capacitance is a capacitance Cx1 of 0.1uF, and the fourth capacitance is a capacitance Cx2 of 0.1 uF.

As a further improvement of the above technical solution, the second capacitance and the third capacitance are a capacitance Cy of 2200 pF.

As a further improvement of the above technical solution, the inductance of the first common mode inductor and the inductance of the second common mode inductor are both 0.5mH.

As a further improvement of the above technical solution, the first common mode inductor is made of a manganese-zinc material or an amorphous material, and the second common mode inductor is made of a manganese-zinc material or a nickel-zinc material.

As a further improvement of the above technical solution, the type of the first power plug is national standard RW-3P, and the type of the second power plug is C14 female.

As a further improvement of the above technical solution, the three inductors in the auxiliary filter circuit are made of nickel-zinc material or amorphous material.

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

the utility model provides an adapter type electromagnetic compatibility wave filter, through increase the wave filter circuit on the input wire rod of electron electrical apparatus, the circuit board that need not to change the product carries out circuit filtering, electromagnetic compatibility wave filter includes first filter circuit, second filter circuit and auxiliary filter circuit, the adapter uses with the cooperation of electromagnetic compatibility wave filter, make it have good equilibrium and have certain decay ability at the high frequency, auxiliary filter circuit can provide the high frequency processing characteristic for the output of product, make whole frequency channel have better wave filter throughput. The magnetic ring buckle is arranged on a power line of the adapter and can well inhibit high-frequency noise, the electromagnetic compatibility filter can enable indoor equipment to work and has the functions of resisting interference and optimizing the environment, meanwhile, the application range of the electromagnetic compatibility filter is widened, the structure is simple, the use is convenient and fast, and therefore the interference inhibiting capability of a complete electromagnetic compatibility effect wide frequency domain is achieved.

Drawings

Fig. 1 is a schematic structural diagram of an adapter-type electromagnetic compatibility filter according to the present invention;

fig. 2 is a block diagram of an electromagnetic compatibility filter according to the present invention;

fig. 3 is a circuit diagram of an electromagnetic compatibility filter according to the present invention;

fig. 4 is a diagram of the attenuation effect of the present invention.

The main element symbols are as follows:

100-a first power plug; 110-a first power line; 120-an electromagnetic compatibility filter; 130-a second power line; 140-magnetic ring buckle; 150-a second power plug; 160-a first filter circuit; 170-a second filtering circuit; 180-an auxiliary filter circuit; 190-a first capacitance; 200-a second capacitance; 210-a third capacitance; 220-a fourth capacitance; 230-a first common mode inductance; 240-second common mode inductance.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1, 2 and 3, the present invention provides an adapter type electromagnetic compatibility filter, including a first power plug 100, a first power line 110, an electromagnetic compatibility filter 120, a second power line 130, a magnetic ring fastener 140 and a second power plug 150, where the first power plug 100 is connected to an input end of the electromagnetic compatibility filter 120 through the first power line 110, an output end of the electromagnetic compatibility filter 120 is connected to the magnetic ring fastener 140 through the second power line 130, and the magnetic ring fastener 140 is connected to the second power plug 150;

the emc filter 120 includes a first filter circuit 160 connected to the input terminal, a second filter circuit 170 connected to the first filter circuit 160, and an auxiliary filter circuit 180 connected to the second filter circuit 170, wherein the first filter circuit 160 includes a first capacitor 190, a first common-mode inductor 230, and a second capacitor 200 connected in parallel, the second filter circuit 170 includes a second common-mode inductor 240, a third capacitor 210, and a fourth capacitor 220 connected in parallel, the second capacitor 200 is connected in parallel to the third capacitor 210, the auxiliary filter circuit 180 includes three inductors connected in parallel, and the auxiliary filter circuit 180 is connected to the output terminal.

In this embodiment, electromagnetic compatibility (EMC) refers to the ability of a device or system to perform satisfactorily in its electromagnetic environment without generating intolerable electromagnetic interference to any device in its environment. EMC includes that the electromagnetic interference generated by the equipment to the environment cannot exceed a certain limit value during normal operation, and the appliance has a certain degree of immunity to the electromagnetic interference existing in the environment, i.e. electromagnetic sensitivity. An adapter is an interface converter that may be a stand-alone hardware interface device that allows a hardware or electronic interface to be connected to other hardware or electronic interfaces, or may be an information interface. The electromagnetic compatibility filter 120 is composed of a first filter circuit 160, a second filter circuit 170 and an auxiliary filter circuit 180, the first filter circuit 170 and the second filter circuit 180 have the same structure, and the multi-stage filtering can widen the filtering range of the adapter. The magnetic ring buckle 140 is provided at the output end of the adapter, and can improve the electromagnetic field around the electromagnet, thereby avoiding external interference.

It should be noted that the first capacitor 190, the second capacitor 200, the third capacitor 210, and the fourth capacitor 220 are all safety capacitors, the first capacitor 190 is a capacitor Cx1 of 0.1uF, the fourth capacitor 220 is a capacitor Cx2 of 0.1uF, the second capacitor 200 and the third capacitor 2210 are a capacitor Cy of 2200pF, the inductance values of the first common mode inductor 230 and the second common mode inductor 240, which are L1 and L2, are both 0.5mH, the first common mode inductor 230 is made of mn-zn material or amorphous material, the second common mode inductor 240 is made of mn-zn material or ni-zn material, the first power plug 100 is RW-3P, the second power plug 150 is C14 female, and the three inductors in the auxiliary filter circuit 180 are made of ni-zn material or amorphous material. The first capacitor 190, the first common mode inductor 230, the second common mode inductor 240 and the fourth capacitor 220 are connected with the live wire and the neutral wire of the power line, the second capacitor 200 is connected with the neutral wire and the ground wire of the power line, the third capacitor 210 is connected with the live wire and the ground wire of the power line, and the three inductors in the auxiliary filter circuit 180 are respectively connected with the live wire, the neutral wire and the ground wire of the power line.

It should be understood that the capacitor Cx1 and the capacitor Cx2 can filter out the power supply differential mode interference signal, the C14 bus is IEC60320-C14 standard belonging to the AC input power socket, and the first common mode inductor 230 and the second common mode inductor 240 can filter out the power supply common mode interference signal. The magnetic ring buckle 140 is added on the power line, so that the interference on an electronic product can be better solved, the magnetic ring buckle 140 is arranged on the power line and can better attack the interference, the magnetic ring is generally made of ferrite materials Mn-Zn, the magnetic ring has different impedance characteristics under different frequencies, the impedance is generally small under low frequency, and the impedance presented by the magnetic ring is sharply increased when the signal frequency is increased. The filter circuit is added on the input wire of the electronic appliance, the filter is designed into a desktop filter shape, and the output wire is matched with various INLET input devices, so that the complete electromagnetic compatibility interference suppression capability is achieved.

Referring to fig. 4, fig. 4 shows an attenuation effect diagram of 100KHz to 1GHz of the adapter type electromagnetic compatibility filter according to this embodiment, the adapter type electromagnetic compatibility filter performs line filtering without changing the circuit board, so as to achieve an effective simple filter effect, the suppression effect reaches more than 70dB, the high frequency 200MHz to 1GHz reaches 30dB, if the suppression effects of the first power line 110 and the second power line 130 are increased, the shielding layer of the power line can be increased, and the shielding layer is a cross-weave mesh structure and weaves more than 128 pieces, so as to achieve a suppression effect of 50 dB.

It should be noted that, for some household sound boxes, which are affected by the whole electricity utilization environment, background noise is easily generated, and the sound quality effect of the sound box is affected, the whole filtering module includes a main filtering circuit, the main circuit is a two-stage filtering, good balance of 100KHz-200MHz is obtained, the suppression effect reaches about 70dB, and meanwhile, certain attenuation capability is also provided at high frequency. The auxiliary filter circuit 180 further suppresses the output end close to the line, and also enables the output end of the product to have a high-frequency processing characteristic, and the effect of suppression is stronger the closer the high-frequency emission is to the product, so that the whole frequency band has better filter processing capability due to the addition of the auxiliary filter circuit 180. Because the initial EMI of the circuit board is insufficient, namely the electromagnetic interference is not enough, the later change is difficult, the simple and effective external filter is provided, the problem of electromagnetic compatibility in a complex environment is conveniently solved, and the interference influence on the current household equipment is well inhibited.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (8)

1. An adapter type electromagnetic compatibility filter is characterized by comprising a first power plug, a first power line, an electromagnetic compatibility filter, a second power line, a magnetic ring buckle and a second power plug, wherein the first power plug is connected with the input end of the electromagnetic compatibility filter through the first power line, the output end of the electromagnetic compatibility filter is connected with the magnetic ring buckle through the second power line, and the magnetic ring buckle is connected with the second power plug;

the electromagnetic compatibility filter includes with the first filter circuit that the input is connected, with the second filter circuit that first filter circuit connects, and connect second filter circuit's supplementary filter circuit, first filter circuit includes parallelly connected first electric capacity, first common mode inductance and second electric capacity, second filter circuit includes parallelly connected second common mode inductance, third electric capacity and fourth electric capacity, the second electric capacity with the third electric capacity is parallelly connected, supplementary filter circuit includes parallelly connected three inductance, supplementary filter circuit connects the output.

2. The adapter-type electromagnetic compatibility filter according to claim 1, wherein said first, second, third and fourth capacitors are all ampere-rated capacitors.

3. Adapter type electromagnetic compatibility filter according to claim 2, characterized in that said first capacitance is a capacitance Cx1 of 0.1uF and said fourth capacitance is a capacitance Cx2 of 0.1 uF.

4. The adapter-type emc filter of claim 2, wherein the second and third capacitances are a capacitance Cy of 2200 pF.

5. The adapter-type electromagnetic compatibility filter according to claim 1, wherein the inductances of the first and second common-mode inductors are each 0.5mH.

6. The adapter-type electromagnetic compatibility filter according to claim 5, wherein the first common-mode inductor is made of Mn-Zn material or amorphous material, and the second common-mode inductor is made of Mn-Zn material or Ni-Zn material.

7. The adapter-type emc filter according to claim 1, wherein the first power plug is of a type of national standard RW-3P, and the second power plug is of a type of C14 female.

8. The adapter-type emc filter of claim 1, wherein the three inductors of the auxiliary filter circuit are ni-zn or amorphous.

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