CN210093110U

CN210093110U - EMI power filter

Info

Publication number: CN210093110U
Application number: CN201920781087.9U
Authority: CN
Inventors: 张华峰; 赵领
Original assignee: Wuhan Xinyuan Automatic Control Engineering Co Ltd
Current assignee: Wuhan Xinyuan Automatic Control Engineering Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-18
Anticipated expiration: 2029-05-28

Abstract

The utility model provides an EMI power filter, which at least comprises a filtering unit, a bus bar and an outer shell, wherein the filtering unit is arranged on a mounting seat, the mounting seat is a concave seat, the concave surface at the upper part of the mounting seat is a cambered surface, and the filtering unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor which are arranged on the circuit board; the magnetic ring is arranged in the concave surface of the mounting seat and is attached to the concave surface; the circuit boards are positioned on two sides of the magnetic ring and are arranged on the side surface of the mounting seat; the bus bar penetrates through the ring of the magnetic ring, the middle part of the bus bar is fixed in the magnetic ring through insulating filler, and two ends of the bus bar are inserted into the corresponding reinforcing plates; a fixing seat is arranged between the magnetic ring and the reinforcing plate, and the busbar is fixedly connected with the fixing seat. The utility model discloses add the fixing base between magnetic ring and reinforcing plate, make the main performance part in the wave filter fixed more firmly through its support to female arranging, reduce because of the inside subassembly skew that produces under the external adverse circumstances disturbs, improved the anti-vibration and the shock resistance of product.

Description

EMI power filter

Technical Field

The utility model relates to the field of electronic technology, in particular to EMI power filter.

Background

The power filter is an electrical device which effectively filters a frequency point of a specific frequency in a power line or frequencies except the frequency point. The power filter is connected to the power line to obtain a power signal with a specific frequency or eliminate the power signal with the specific frequency. The power filter is a passive bidirectional network, one end of the power filter is a power supply, and the other end of the power filter is a load, so that the power filter is an impedance adaptation network, and the more impedance mismatch between the input side and the output side of the power filter and the power supply and the load side is, the more effective the attenuation of electromagnetic interference is.

The filter components influencing the performance in the power filter products sold on the market at present are only fixed on the shell by the base, when the products are used in a vibration or impact environment, the filter components are easy to loosen, the vibration and impact resistance is poor, the loss curve of the products is greatly changed after the products are subjected to vibration or impact, the product performance is unstable, the service life of the products is greatly shortened when the products are used in the impact or vibration environment, the maintenance cost is increased, the filters need to be frequently replaced, and great inconvenience is brought to users.

Disclosure of Invention

An object of the utility model is to overcome exist not enough among the prior art to a EMI power filter that connected mode is firm is provided, receive the stable performance under adverse circumstances vibration and the impact with guaranteeing the wave filter, improve the anti shock and the anti-vibration ability of product, improve product life.

In order to achieve the above object, the present invention provides an EMI power filter, which at least comprises a filtering unit, a bus bar and an outer housing, wherein the filtering unit is installed on a mounting seat, the mounting seat is a concave seat, the upper concave surface of the concave seat is a cambered surface, and the filtering unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor installed on the circuit board; the magnetic ring is arranged in the concave surface of the mounting seat and is attached to the concave surface; the circuit boards are positioned on two sides of the magnetic ring and are arranged on the side surface of the mounting seat, the bus bar penetrates through the ring of the magnetic ring, the middle part of the bus bar is fixed in the magnetic ring through insulating fillers, and two ends of the bus bar are inserted into the corresponding reinforcing plates; a fixing seat is arranged between the magnetic ring and the reinforcing plate, a mounting groove corresponding to the position of the busbar is arranged on the upper portion of the fixing seat, and the busbar is located in the mounting groove and fixedly connected with the fixing seat.

The further improvement of the technical scheme is that rib plates are respectively arranged at two ends of the mounting seat and attached to the end faces of the mounting seat.

The utility model discloses a matrix, including the installation seat, the fixing base is equipped with the bottom plate below with the fixing base, and the bottom plate is "I" type, including upper and lower level and middle part face, evenly is provided with mounting hole more than 2 respectively above its upper and lower level, and the fixing base passes through mounting hole fixed connection on the bottom plate, is equipped with bar through-hole more than 2 on the bottom plate middle part face, and bar through-hole evenly distributed is in the middle part face according to the matrix, and the installation seat passes through.

The mounting seat, the fixing seat, the reinforcing plate and the bottom plate are all made of insulating materials.

According to the technical proposal provided by the utility model, the upper part of the fixing seat is provided with a mounting groove corresponding to the position of the bus bar, the bus bar is positioned in the mounting groove and is fixedly connected with the fixing seat, the two ends of the bar sheet of the bus bar are respectively positioned, the part of the bus bar penetrating through the magnetic ring is fixed by the insulating filler and the magnetic ring in the filter unit, the main performance component magnetic ring in the filter is more firmly fixed through the support of the busbar, the circuit boards in the filtering unit in the filter are positioned on two sides of the magnetic ring and are arranged on the side face of the mounting seat, the capacitor and the resistor are respectively arranged on the corresponding circuit boards, each component in the filtering unit respectively adopts an independent fixing structure, the connection mode is reliable, the deviation of internal components caused by the interference of the external severe environment is reduced, and the vibration resistance and the shock resistance of the product are improved. By further adding the rib plate component, the installation of the filtering unit is more stable. Additionally, the technical scheme of the utility model in the mount pad and the fixing base below bottom plate part has been add, the filtering unit, the equal fixed mounting of mount pad and fixing base is on the bottom plate, all subassemblies of wave filter can directly be assembled and dismantle in the outer casing outside, the reinforcing plate part that the cooperation was add, the shell body can be put into again after the completion in the outer equipment of casing completely to the inside components and parts of wave filter, dismantle and also can directly take out the back from the shell body with all components and parts installed on the bottom plate and maintain or change again, it is all very convenient to install and maintain, production technology has also obtained fine optimization.

Through the contrast of capability test result, confirm that the insertion loss curve does not have obvious performance change, numerical value is stable, has proven the utility model discloses anti vibration and shock resistance are good, have improved product property stability, have practiced thrift user's cost of maintenance, and product market perspective is good.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic diagram of the external structure of the present invention.

Fig. 4 is a schematic view of the bottom plate of the present invention.

In the figure: 1. the magnetic circuit comprises a magnetic ring, a circuit board, a capacitor, a resistor, a busbar, a bottom plate, a mounting seat, a reinforcing plate, a fixing seat, a shell, a mounting hole, a through hole and a rib plate, wherein the circuit board is 2, the capacitor is 3, the resistor is 4, the busbar is 5, the bottom plate is 6, the mounting seat is 7, the reinforcing plate is 8, the fixing seat is 9, the shell is 10, the.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

according to fig. 1, fig. 2 and fig. 3, the present embodiment includes a filter unit, a busbar 5 and an outer casing 10, the filter unit is mounted on a mounting seat 7, the mounting seat 7 is a "concave" seat, the upper concave surface of the mounting seat is an arc surface, and the filter unit at least includes a magnetic ring 1, a circuit board 2, and a capacitor 3 and a resistor 4 mounted on the circuit board 2; the magnetic ring 1 is arranged in the concave surface of the mounting seat 7 and is attached to the concave surface; the circuit board 2 is positioned on two sides of the magnetic ring 1 and is arranged on the side surface of the mounting seat 7, the bus bar 5 penetrates through the ring of the magnetic ring 1, the middle part of the bus bar 5 is fixed in the magnetic ring 1 through insulating fillers, and two ends of the bus bar 5 penetrate through the corresponding reinforcing plates 8; be equipped with fixing base 9 between magnetic ring 1 and the reinforcing plate 8, fixing base 9 upper portion is equipped with the mounting groove that corresponds with female row 5 positions, female row 5 be located the mounting groove and with fixing base 9 fixed connection. Ribbed slab 13 is installed respectively to the both ends of mount pad 7, and ribbed slab 13 laminates in the terminal surface of mount pad 7. The mounting seat 7, the reinforcing plate 8 and the fixing seat 9 are all made of insulating materials.

According to fig. 1, fig. 2 and fig. 4 show, this embodiment can also be equipped with bottom plate 6 below mount pad 7 and fixing base 9, and bottom plate 6 is "I" type, including upper and lower and middle part face, evenly be provided with mounting hole 11 more than 2 respectively about it, and the fixing base passes through mounting hole 11 fixed connection on bottom plate 6, is equipped with bar through-hole 12 on the face of bottom plate 6 middle part, and bar through-hole 12 presses matrix evenly distributed in middle part face, and mount pad 7 passes through-hole 12 fixed connection on bottom plate 6. The bottom plate 6 is an insulating material.

The busbar in this embodiment is composed of three flat copper sheets.

The bottom plate part is overall structure in this embodiment, and total 40 bar through-holes 12 that are matrix distribution on the 6 middle part faces of bottom plate, the setting up of bar through-hole not only makes the mount pad can connect on the bottom plate more conveniently, and the bar through-hole can also alleviate the weight of bottom plate by a wide margin moreover, avoids the wave filter product to make whole weight increase too much because of the increase of part.

This embodiment is through having add the fixing base, fix a position respectively to female row's row piece both ends, and female the middle part of arranging is fixed in the magnet ring through insulating filler, it is more firm to make the main performance part magnetic ring in the wave filter fixed through the support to female arranging, and the circuit board in the filter unit in this technical scheme is located the both sides of magnet ring and installs in the side of mount pad, electric capacity and resistance are installed respectively on the circuit board that corresponds, each part in the filter unit has adopted independent fixed knot structure respectively, connected mode is reliable, reduce the interior subassembly skew that produces because of outside adverse circumstances disturbs down.

The utility model discloses the filter is through following test verification performance, and specific test item is as follows:

EMI power filter environmental test project

And testing the performance of the filter before the environmental test, and retesting the performance of the filter in the testing process and after the filter is tested by the environmental test.

Comparing the result before the performance test with the test result in the test process and after the test is finished, confirming that the whole trend of the insertion loss curve is stable without obvious performance change; through the comparison of the insertion loss values of the main frequency points, the values are stable and meet the requirements of the test outline.

The experiment verifies above the utility model discloses a filter product property can be stable, and anti-vibration and impact effect are good.

Claims

1. The utility model provides an EMI power filter, includes filtering unit, female arranging and shell body at least, its characterized in that: the filter unit is arranged on the mounting seat, the mounting seat is a concave-shaped seat, the concave surface of the upper part of the mounting seat is an arc surface, and the filter unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor which are arranged on the circuit board; the magnetic ring is arranged in the concave surface of the mounting seat and is attached to the concave surface; the circuit boards are positioned on two sides of the magnetic ring and are arranged on the side surface of the mounting seat; the bus bar penetrates through the ring of the magnetic ring, the middle part of the bus bar is fixed in the magnetic ring through insulating filler, and two ends of the bus bar are inserted into the corresponding reinforcing plates; a fixing seat is arranged between the magnetic ring and the reinforcing plate, a mounting groove corresponding to the position of the busbar is arranged on the upper portion of the fixing seat, and the busbar is located in the mounting groove and fixedly connected with the fixing seat.

2. The EMI power filter of claim 1, wherein: the both ends of mount pad are installed the floor respectively, and the floor laminating is in the terminal surface of mount pad.

3. The EMI power filter of claim 1, wherein: the mounting seat, the fixing seat and the reinforcing plate are all made of insulating materials.