CN210297657U - Low leakage current power filter - Google Patents
Low leakage current power filter Download PDFInfo
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- CN210297657U CN210297657U CN201921425871.2U CN201921425871U CN210297657U CN 210297657 U CN210297657 U CN 210297657U CN 201921425871 U CN201921425871 U CN 201921425871U CN 210297657 U CN210297657 U CN 210297657U
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- cover plate
- feedthrough capacitor
- filter
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- shell
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Abstract
The utility model relates to the technical field of filters, in particular to a low leakage current power filter, which comprises a shell, a wire inlet cover plate, a wire outlet cover plate, a side baffle plate, a feedthrough capacitor and an inductance coil, wherein one end of the feedthrough capacitor is connected with a live wire or a zero line, and the other end is directly grounded; the feedthrough capacitor is connected with the inductance coil; one end of the shell is provided with a wire inlet cover plate, the other end of the shell is provided with a wire outlet cover plate, and the wire inlet cover plate and the wire outlet cover plate are fixedly arranged on the shell through bolts; the feedthrough capacitor is disposed on the side partition for direct connection of the filter internal lead to ground. The utility model discloses a package of punching electric capacity and inductance coils reduces the power filter and leaks current, reduces the filter volume, improves the security performance, is equipped with the silk screen in many places such as apron, fixed plate simultaneously, can effectively prevent piercing through of interfering signal.
Description
Technical Field
The utility model relates to a wave filter technical field, concretely relates to low leakage current power filter.
Background
The power filter is a filter circuit consisting of a capacitor, an inductor and a resistor, and is a passive bidirectional network, wherein one end of the passive bidirectional network is a power supply, and the other end of the passive bidirectional network is a load. The power filter is an impedance adaptation network, and the more impedance adaptation of the input side and the output side of the power filter to the power supply side and the load side is, the more effective the attenuation of electromagnetic interference is. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency. Four types of leakage currents are involved: semiconductor element leakage current, power supply leakage current, capacitance leakage current, and filter leakage current. The power filter leakage current is the current from the filter housing to either end of the ac inlet line at the rated ac voltage. The power filter leakage current is decisive in that the value of the leakage current depends mainly on the leakage current of the common-mode capacitance Cy, i.e. mainly on the capacity of Cy, if all ports of the filter are completely insulated from the housing.
With the rapid development of power electronic technology, more and more electrical devices are widely applied to various fields such as industry, national defense, household electrical appliances and the like. At the same time, however, the leakage current problem of these electrical devices during normal operation becomes a great safety hazard for users. An effective solution to the problem of leakage current of power filters in electrical devices has not been proposed.
Disclosure of Invention
For overcoming the not enough of prior art, the utility model provides a low leakage current power filter for reduce power filter's leakage current problem, can reduce the filter volume simultaneously, improve power equipment's security performance.
In order to realize the purpose of the utility model, the technical scheme of the utility model is as follows: a low leakage current power filter comprises a shell, an incoming line cover plate, an outgoing line cover plate, a side partition plate, a feedthrough capacitor and an inductance coil, wherein one end of the feedthrough capacitor is connected with a live wire or a zero line, and the other end of the feedthrough capacitor is directly grounded; the feedthrough capacitor is connected with the inductance coil; one end of the shell is provided with a wire inlet cover plate, the other end of the shell is provided with a wire outlet cover plate, and the wire inlet cover plate and the wire outlet cover plate are fixedly arranged on the shell through bolts; the feedthrough capacitor is disposed on the side partition for direct connection of the filter internal lead to ground.
Further, the filter further comprises an insulating gasket, wherein the insulating gasket is placed at the joint of the side partition plate and the feedthrough capacitor and used for inhibiting interference signals conducted from the lead.
Furthermore, the filter also comprises a wire mesh, wherein the wire mesh is covered inside the outlet cover plate and used for shielding current signals and ensuring that the filter bin and the outlet end are in an electromagnetic sealing environment.
Further, above-mentioned wave filter still includes the fixed orifices, the fixed orifices is used for at shielding room or wall fixed power filter, the fixed orifices is provided with the silk screen packing ring, prevents to pierce through interference signal.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a low leakage current power filter reduces power filter leakage current through punching electric capacity and inductance coils's encapsulation, reduces the filter volume, improves the security performance, is equipped with the silk screen in many places such as apron, fixed plate simultaneously, can effectively prevent penetrating through of interfering signal.
Drawings
Fig. 1 is a schematic diagram of the low leakage current power filter of the present invention.
Fig. 2 is a schematic diagram of the structure of the low leakage current power filter of the present invention.
Fig. 3 is a circuit diagram of the low leakage current power filter of the present invention.
Fig. 4 is an installation schematic diagram of the low leakage current power filter of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that the technical solutions and design principles of the present invention are described in detail below only with an optimized technical solution, but the scope of the present invention is not limited thereto.
The embodiment is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and any obvious improvement, replacement or modification which can be made by those skilled in the art without departing from the essence of the present invention belongs to the protection scope of the present invention.
As shown in fig. 1 and 2, the utility model relates to a low leakage current power filter, which comprises a shell, a wire inlet cover plate, a wire outlet cover plate, a side baffle plate, a feedthrough capacitor and an inductance coil, wherein one end of the feedthrough capacitor is connected with a live wire or a zero line, and the other end is directly grounded; the feedthrough capacitor is connected with the inductance coil; one end of the shell is provided with a wire inlet cover plate, the other end of the shell is provided with a wire outlet cover plate, and the wire inlet cover plate and the wire outlet cover plate are fixedly arranged on the shell through bolts; the feedthrough capacitor is disposed on the side partition for direct connection of the filter internal lead to ground.
Further, the filter further comprises an insulating gasket, wherein the insulating gasket is placed at the joint of the side partition plate and the feedthrough capacitor and used for inhibiting interference signals conducted from the lead.
Furthermore, the filter also comprises a wire mesh, wherein the wire mesh is covered inside the outlet cover plate and used for shielding current signals and ensuring that the filter bin and the outlet end are in an electromagnetic sealing environment.
Further, above-mentioned wave filter still includes the fixed orifices, the fixed orifices is used for at shielding room or wall fixed power filter, the fixed orifices is provided with the silk screen packing ring, prevents to pierce through interference signal.
As shown in fig. 3, one end of the feedthrough capacitor of the present invention is connected to the live wire or the zero line, and the other end is directly grounded; the feedthrough capacitor is connected with the inductance coil.
As shown in fig. 4, the utility model discloses when the installation, when the wave filter is fixed on the wall of screened room or darkroom, it is fixed through waveguide screw rod, nut between casing and wall body, adds plain washer, silk screen packing ring between casing and wall body, prevents that interference signal from directly piercing through the wall body. The fixing hole of the filter is fixed by a fixing bolt, and a wire mesh gasket is additionally arranged between the fixing bolt and the fixing hole.
Claims (4)
1. A low leakage current power filter is characterized by comprising a shell, an incoming line cover plate, an outgoing line cover plate, a side partition plate, a feedthrough capacitor and an inductance coil, wherein one end of the feedthrough capacitor is connected with a live wire or a zero line, and the other end of the feedthrough capacitor is directly grounded; the feedthrough capacitor is connected with the inductance coil; one end of the shell is provided with a wire inlet cover plate, the other end of the shell is provided with a wire outlet cover plate, and the wire inlet cover plate and the wire outlet cover plate are fixedly arranged on the shell through bolts; the feedthrough capacitor is placed on the side partition plate and used for directly connecting the internal lead of the filter with the ground.
2. The low leakage current power filter of claim 1, further comprising an insulating gasket disposed at the junction of the side spacers and the feedthrough capacitor for suppressing interference signals conducted from the leads.
3. The low leakage current power filter of claim 1, further comprising a wire mesh, wherein the wire mesh is covered inside the outlet cover plate for shielding current signals and ensuring that the inside of the filter chamber and the outlet end are in an electromagnetically sealed environment.
4. The low leakage current power filter of claim 1, further comprising fixing holes for fixing the power filter in a shielded room or a wall surface, the fixing holes being provided with wire mesh washers to prevent penetration of interference signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921425871.2U CN210297657U (en) | 2019-08-29 | 2019-08-29 | Low leakage current power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921425871.2U CN210297657U (en) | 2019-08-29 | 2019-08-29 | Low leakage current power filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210297657U true CN210297657U (en) | 2020-04-10 |
Family
ID=70063638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921425871.2U Active CN210297657U (en) | 2019-08-29 | 2019-08-29 | Low leakage current power filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210297657U (en) |
-
2019
- 2019-08-29 CN CN201921425871.2U patent/CN210297657U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200813 Address after: Building 6, no.6, Nenjiang Road, Tianmuhu Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Jiangsu wamuke Electronic Technology Co., Ltd Address before: 213300 No. 6, Nenjiang Road, Tianmu Lake, Liyang City, Changzhou City, Jiangsu Province Patentee before: JIANGSU WEMC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |