CN201629721U

CN201629721U - Integrated XY capacitive noise filter

Info

Publication number: CN201629721U
Application number: CN2010201304213U
Authority: CN
Inventors: 王晓峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-12
Filing date: 2010-03-12
Publication date: 2010-11-10
Anticipated expiration: 2020-03-12

Abstract

The utility model provides an integrated XY noise filter, which structurally comprises an outer casing, a Y capacitor, a common-mode inductor and an X capacitor, wherein the Y capacitor and the common-mode inductor are arranged inside the outer casing; the common-mode inductor is arranged on the Y capacitor; and the outer casing includes an inner surface and an outer surface. Besides, a ground wire terminal and a first wiring terminal are arranged on two corresponding lateral walls of the inner surface; a second wiring terminal arranged on the outer surface extends into the inner surface of the outer casing and is connected with the first wiring terminal; the Y capacitor is connected between the ground wire terminal and the second wiring terminal; and the X capacitor is welded on the first wiring terminal on the inner surface of the outer casing. As both the X capacitor and the Y capacitor are safety capacitors, the X capacitor connected onto the first wiring terminal realizes the effect of eliminating series-mode interference, and the Y capacitor connected between the second wiring terminal and the ground wire terminal realizes the effect of eliminating common-mode interference.

Description

A kind of integrated XY electric capacity noise filter

Technical field

The utility model relates to a kind of filter, and more specifically language is meant a kind of integrated XY electric capacity noise filter.

Background technology

As you know, electronic filter is that a kind of being specifically designed to removed in the signal undesired composition and made the undamped a kind of electronic device that passes through smoothly of useful signal.Alternate differential mode noise and common mode noise in the main filtering circuit of noise filter.

At present, common noise filter circuit mainly is to be combined by the X electric capacity, Y electric capacity and the common mode differential mode inductance that separate.The reason that influences its performance mainly contain following some, at first,, and exist parasitic capacitance on the common mode inductance coil because the lead-in wire of electric capacity has inductance, although these inductance, electric capacity are very little, when frequency was higher, their influence can not be ignored.Therefore the low-pass filter circuit that is made of actual inductance, capacitor has just become a rejector circuit when frequency is higher, might cause the distortion of desired signal.

Secondly, the isolation between degree of coupling during high frequency between the device and device and the external environment condition also is the major reason that influences the performance of common mode noise filter.Even the circuit structure of filter is identical, and because the difference of the difference of the coupling degree difference of device, internal structure and encapsulating material all can have influence on noise filter high frequency performance height.

So, want to improve the performance of noise filter, when producing, need aspect many, note manufacture craft, as select the little electric capacity of inductance for use, the lead-in wire of capacitor is short as far as possible when making the little inductance of parasitic capacitance, welding, to reduce the inductance that lead-in wire produces, and avoid the direct contact between the device, in order to avoid have influence on the stability of transmission signals.

Summary of the invention

The utility model is to provide a kind of integrated XY electric capacity noise filter, and it can realize the filtering of common mode noise and differential mode noise, can be installed in easily in the narrow and small flat space.And this is to be main purpose of the present utility model.

Of the present utility modelly be to provide a kind of integrated XY electric capacity noise filter, it uses the PCB copper-clad plate as Y electric capacity, come the control capacittance size by the size and the number of plies that change the PCB copper-clad plate, and by changing the size of inductance and Y electric capacity, change the frequency characteristic of LC filter, thereby reach the common mode noise that suppresses loop different frequency section.And this is to be another purpose of the present utility model.

The utility model is to provide a kind of integrated XY electric capacity noise filter, and its X electric capacity is placed on the epoxide-resin glue, and compact conformation reduces height.And this is to be a purpose more of the present utility model.

The utility model is to provide a kind of integrated XY electric capacity noise filter, and by its special structure design, it is simple in structure, and is easily manufactured.And this is to be another purpose of the present utility model.

For achieving the above object, the technical solution adopted in the utility model is: a kind of integrated XY electric capacity noise filter, comprise shell, Y electric capacity, common mode inductance and X electric capacity, wherein, this Y electric capacity and this common mode inductance are arranged in this shell, and this common mode inductance is arranged on this Y electric capacity, this shell comprises inner surface and outer surface, wherein, two corresponding sidewalls of this inner surface are provided with the ground wire terminal and first binding post, and this outer surface is provided with second binding post, and this second binding post extends in the inner surface of this shell and with this first binding post and is connected.

This Y electric capacity is connected between this ground wire terminal and this second binding post, this Y electric capacity forms by polylith pcb board group is folded, wherein, each piece pcb board is connected with another piece pcb board, and, be provided with first insulating trip between each piece pcb board and another piece pcb board, by this first insulating trip that each piece pcb board and another piece pcb board is isolated.

This common mode inductance is placed on this Y electric capacity, this common mode inductance comprises magnetic core and coil, wherein, this coil is wrapped on this magnetic core, be provided with second insulating trip between this common mode inductance and this Y electric capacity, promptly this second insulating trip is arranged between this polylith pcb board and this coil, and is by this second insulating trip that the inductance of this polylith pcb board and this common mode inductance is isolated, the top of this common mode inductance is provided with epoxide-resin glue, by this epoxide-resin glue this Y electric capacity and common mode inductance is sealed in this shell.

This X electric capacity is placed on this epoxide-resin glue, and this X electric capacity is provided with wiring, and this wiring is welded on first binding post of this inner surface of outer cover.

Further, each piece pcb board all covers copper circuit board for PCB.

The beneficial effects of the utility model are: the utility model structurally comprises, shell, Y electric capacity, common mode inductance and X electric capacity, wherein, this Y electric capacity and this common mode inductance are arranged in this shell, and this common mode inductance is arranged on this Y electric capacity, this shell comprises inner surface and outer surface, wherein, two corresponding sidewalls of this inner surface are provided with the ground wire terminal and first binding post, and this outer surface is provided with second binding post, and this second binding post extends in the inner surface of this shell and with this first binding post and is connected.This Y electric capacity is connected between this ground wire terminal and this second binding post, this X condenser welding is connected on first binding post of this inner surface of outer cover, because X electric capacity and Y electric capacity all are safe electric capacity, X electric capacity is connected on first binding post and realizes eliminating the effect of series mode interference, and Y electric capacity is connected on the effect that realizes eliminating common mode disturbances between second binding post and the ground wire.

In addition, the utility model can also realize being installed in easily the effect in the narrow and small flat space, it is to use PCB copper-clad plate conduct " Y " electric capacity, the size by changing the PCB copper-clad plate and the number of plies are come the control capacittance size, and, change the frequency characteristic of LC filter, thereby reach the common mode noise that suppresses loop different frequency section by changing the size of inductance and " Y " electric capacity, and it is simple in structure, and is easily manufactured.

Description of drawings

Fig. 1 is the exploded view of embodiment of the present utility model;

Fig. 2 is the cross-sectional view that the polylith pcb board of embodiment of the present utility model is connected with first insulating trip.

Embodiment

As 1 to Figure 2 shows that a kind of preferable specific embodiment of the present utility model, a kind of integrated XY electric capacity noise filter, comprise shell 10, Y electric capacity 20, common mode inductance 30 and X electric capacity 40, wherein, this Y electric capacity 20 and this common mode inductance 30 are arranged in this shell 10, and this common mode inductance 30 is arranged on this Y electric capacity 20.

This shell 10 comprises inner surface 11 and outer surface 12, wherein, two corresponding sidewalls of this inner surface 11 are provided with the ground wire terminal 111 and first binding post 112, and this outer surface 12 is provided with second binding post 121, and this second binding post 121 extends in the inner surface 11 of this shell 10 and with this first binding post 112 and is connected.

What deserves to be mentioned is that this first binding post 121 and this second binding post 112 are as incoming line of the present utility model.

As shown in Figure 2, this Y electric capacity is connected between this ground wire terminal 111 and this second binding post 121, this Y electric capacity 20 is by 21 groups of folded forming of polylith pcb board, wherein, each piece pcb board 21 is connected with another piece pcb board 21, and, be provided with first insulating trip 22 between each piece pcb board 21 and another piece pcb board 21, by this first insulating trip 22 that each piece pcb board 21 is isolated with another piece pcb board 21.

Further, this Y electric capacity 20 is provided with ground pads and two lead-in wires.

What deserves to be mentioned is that each piece pcb board 21 all covers copper circuit board for PCB.

This common mode inductance 30 is placed on this Y electric capacity 20, this common mode inductance 30 comprises magnetic core 31 and coil 32, wherein, this coil 32 is wrapped on this magnetic core 31, be provided with second insulating trip 33 between this common mode inductance 30 and this Y electric capacity 20, promptly this second insulating trip 33 is arranged between this polylith pcb board 21 and this coil 32, and is by this second insulating trip 33 that the inductance of this polylith pcb board and this common mode inductance 33 is isolated.

The top of this common mode inductance 30 is provided with epoxide-resin glue 50, by this epoxide-resin glue 50 this Y electric capacity 20 and common mode inductance 30 is sealed in this shell 10.

This X electric capacity 50 is placed on this epoxide-resin glue 50, and this X electric capacity 50 is provided with wiring 51, and this wiring 51 is welded on first binding post 112 of these shell 10 inner surfaces 11.

Further, the coil 32 of this common mode inductance 30 is provided with four wiring, in addition, two lead-in wires of these four wiring and this Y electric capacity 20 are connected on the binding post 121 of this shell 10 by lead respectively, and the ground pads of this Y electric capacity 20 is installed on this ground wire terminal 111 by connecting line.

By above-mentioned element and connected mode thereof, what the utility model will be realized is, in insulation crust, place common mode inductance and Y electric capacity, use the epoxide-resin glue embedding then, make it into as a whole, wherein, regulate the Y capacitance size by the size and the number of plies that change pcb board.And common mode inductance 30 uses height to lead the coiling of soft magnetism core material to form.Common mode inductance 30 crouched to be placed on the Y electric capacity, simultaneously with inductance two ends wire bonds on Y electric capacity pad, so just form a LC filter circuit; In addition,, change the frequency characteristic of LC filter, thereby reach the common mode noise that suppresses loop different frequency section by changing the size of inductance and Y electric capacity.Because X electric capacity and Y electric capacity all are safe electric capacity, X electric capacity is connected on first binding post 112 (incoming line) and is used for eliminating series mode interference, and Y electric capacity is connected between second binding post 121 (incoming line) and the ground wire and is used for eliminating common mode disturbances.

Claims

1. integrated XY electric capacity noise filter, comprise shell, Y electric capacity, common mode inductance and X electric capacity, wherein, this Y electric capacity and this common mode inductance are arranged in this shell, and this common mode inductance is arranged on this Y electric capacity, it is characterized in that: this shell comprises inner surface and outer surface, wherein, two corresponding sidewalls of this inner surface are provided with the ground wire terminal and first binding post, and this outer surface is provided with second binding post, and this second binding post extends in the inner surface of this shell and with this first binding post and is connected;

This Y electric capacity is connected between this ground wire terminal and this second binding post, this Y electric capacity forms by polylith pcb board group is folded, wherein, each piece pcb board is connected with another piece pcb board, and, be provided with first insulating trip between each piece pcb board and another piece pcb board, by this first insulating trip that each piece pcb board and another piece pcb board is isolated;

This common mode inductance is placed on this Y electric capacity, this common mode inductance comprises magnetic core and coil, wherein, this coil is wrapped on this magnetic core, be provided with second insulating trip between this common mode inductance and this Y electric capacity, promptly this second insulating trip is arranged between this polylith pcb board and this coil, and is by this second insulating trip that the inductance of this polylith pcb board and this common mode inductance is isolated, the top of this common mode inductance is provided with epoxide-resin glue, by this epoxide-resin glue this Y electric capacity and common mode inductance is sealed in this shell;

2. a kind of integrated XY electric capacity noise filter as claimed in claim 1 is characterized in that each piece pcb board all covers copper circuit board for PCB.