CN205960949U - Device that restraines flat screen television switching power supply radiation - Google Patents
Device that restraines flat screen television switching power supply radiation Download PDFInfo
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- CN205960949U CN205960949U CN201621037825.1U CN201621037825U CN205960949U CN 205960949 U CN205960949 U CN 205960949U CN 201621037825 U CN201621037825 U CN 201621037825U CN 205960949 U CN205960949 U CN 205960949U
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Abstract
The utility model discloses a device that restraines flat screen television switching power supply radiation, including switching transformer, the switch tube, condenser A, condenser B, condenser D, resistor A, resistor B, resistor C, resistor E, diode A, diode B, magnetic bead A, magnetic bead B, switching transformer has power supply side wire winding group and flat screen television power consumption side wire winding group, third terminal and fourth terminal have in switching transformer's the power supply side wire winding group, first terminal and second terminal have in switching transformer's the flat screen television power consumption side wire winding group, first terminal passes through wire A electricity with the DC input and is connected, the second terminal passes through wire B with the drive end, the switch tube electricity is connected. The utility model discloses increase snubber circuit, can restrain the flat screen television switching power supply radiation, reduced flat screen television switching power supply's radiation, protected each electronic components.
Description
Technical field
The utility model is related to be applied to the field of electromagnetic compatibility of flat panel TV Switching Power Supply, and more particularly, to a kind of suppression is flat
The device of plate TV Switching Power Supply radiation.
Background technology
When the switching tube (MOSFET) of flat panel TV Switching Power Supply is operated on off state, electric current (Ids) and voltage (Vds)
Rapid mutation causes that △ i/ △ t and △ u/ △ t is very big, switching moments when frequency of oscillation and amplitude very big, so that switch electricity
The radiation interference in source is very serious.Radiation the utility model patent for reducing flat panel TV Switching Power Supply provides a kind of suppression flat board
The method and device of TV Switching Power Supply radiation.
Utility model content
Part in view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of suppression flat panel TV to open
The device of powered-down source radiation, this device can reduce the radiation of flat panel TV Switching Power Supply.
The purpose of this utility model is achieved through the following technical solutions：
A kind of device of suppression flat panel TV Switching Power Supply radiation, including switch transformer and switching tube, switch transformer
There is supply side coiling group and flat panel TV electricity consumption side coiling group, the supply side coiling group of switch transformer has the 3rd wiring
Post and the 4th binding post, the flat panel TV electricity consumption side coiling group of switch transformer has the first binding post and the second binding post,
Described first binding post is electrically connected by wire A with DC input, and described second binding post passes through wire B, switch with drive end
Pipe electrical connection it is characterised in that：Also include capacitor A, capacitor B, capacitor D, resistor A, resistor B, resistor C, electricity
Resistance device E, diode A, diode B, magnetic bead A, magnetic bead B, described capacitor A, resistor A, resistor B, resistor C, capacitor B
It is respectively provided with the first terminals and the second terminals, described capacitor A, resistor A, resistor B, resistor C, capacitor B
First terminals are electrically connected with wire A respectively, and second terminals of described capacitor A are electrically connected with diode A negative pole end, two poles
Pipe A positive terminal is electrically connected with switching tube, described resistor A, resistor B, resistor C the second terminals respectively with diode B
Negative pole end electrically connects, and diode A positive terminal is electrically connected with switching tube, and second terminals of described capacitor B are thermally electric with power supply
Connect, described switching tube is thermally electrically connected with power supply；Described magnetic bead A, magnetic bead B the first terminals respectively with second binding post electricity
Connect, described magnetic bead A, second terminals of magnetic bead B are electrically connected with diode A positive terminal respectively；Described capacitor D positive terminal with
3rd binding post electrical connection, capacitor D negative pole end is electrically connected with first terminals of resistor E, second terminals of resistor E
Electrically connect with the 4th binding post.
In order to the utility model is better achieved, device of the present utility model also includes capacitor C, resistor D, described electricity
First terminals of container C are electrically connected with diode A positive terminal, second terminals of described capacitor C and the first of resistor D
Terminals electrically connect, and first terminals of resistor D are thermally electrically connected with power supply.
The utility model compared with the prior art, has advantages below and beneficial effect：
The utility model increased absorbing circuit, flat panel TV Switching Power Supply can be suppressed to radiate, reduce flat panel TV
The radiation of Switching Power Supply, protects each electronic devices and components.
Brief description
Fig. 1 is structural representation of the present utility model.
Wherein, entitled corresponding to the reference in accompanying drawing：
T1- switch transformer, Q1- switching tube, C1- capacitor A, C2- capacitor B, C3- capacitor C, C4- electricity
Container D, R1- resistor A, R2- resistor B, R3- resistor C, R4- resistor D, R5- resistor E, D1- diode
A, D2- diode B, L1- magnetic bead A, L2- magnetic bead B.
Specific embodiment
With reference to embodiment, the utility model is described in further detail：
Embodiment
As shown in figure 1, a kind of device of suppression flat panel TV Switching Power Supply radiation, including switch transformer T1 and switching tube
Q1, switch transformer T1 have supply side coiling group and a flat panel TV electricity consumption side coiling group, the supply side of switch transformer T1 around
3rd binding post and the 4th binding post are had on line group, the flat panel TV electricity consumption side coiling group of switch transformer T1 has first
Binding post and the second binding post, the first binding post is electrically connected by wire A with DC input；DC input is as shown in Figure 1
DC input electric connecting terminal.Second binding post is electrically connected by wire B, switching tube Q1 with drive end；Drive end is as shown in Figure 1
Drive electric connecting terminal.The utility model device also includes capacitor A C1, capacitor B C2, capacitor D C4, resistor A
R1, resistor B R2, resistor C R3, resistor E R5, diode A D1, diode B D2, magnetic bead A L1, magnetic bead B L2,
Capacitor A C1, resistor A R1, resistor B R2, resistor C R3, capacitor B C2 are respectively provided with the first terminals and
Two terminals, capacitor A C1, resistor A R1, resistor B R2, resistor C R3, first terminals of capacitor B C2 divide
Do not electrically connect with wire A, second terminals of capacitor A C1 are electrically connected with diode A D1 negative pole end, diode A D1 positive pole
End electrically connect with switching tube Q1, resistor A R1, resistor B R2, resistor C R3 the second terminals respectively with diode B
D2 negative pole end electrically connects, and diode A D1 positive terminal electrically connected with switching tube Q1, second terminals of capacitor B C2 and power supply
Thermally electrically connect, switching tube Q1 is thermally electrically connected with power supply；Magnetic bead A L1, first terminals of magnetic bead B L2 connect with second respectively
Terminal electrically connects, and magnetic bead A L1, second terminals of magnetic bead B L2 are electrically connected with diode A D1 positive terminal respectively；Capacitor D
C4 positive terminal is electrically connected with the 3rd binding post, and capacitor D C4 negative pole end is electrically connected with first terminals of resistor E R5, electricity
Second terminals of resistance device ER5 are electrically connected with the 4th binding post.
Device of the present utility model also includes capacitor C C3, resistor D R4, and capacitor C C3, resistor D R4 are respectively
There are the first terminals and the second terminals, first terminals of capacitor C C3 are electrically connected with diode AD1 positive terminal, electric capacity
Second terminals of device C C3 are electrically connected with first terminals of resistor D R4, first terminals of resistor DR4 and power supply
Thermally electrically connect.
Capacitor A C1 of the present utility model, resistor A R1, resistor B R2, resistor C R3, diode A D1, two
Pole pipe B D2, magnetic bead A L1, magnetic bead B L2 collectively form first absorbing circuit (or braking absorption circuit), and this absorbing circuit is
The circuit that the utility model increases between the switch transformer armature winding of conventional art, this absorbing circuit can reduce electricity
The frequency of oscillation of stream (Ids) and voltage (Vds) and amplitude.Capacitor B C2 of the present utility model, power supply thermally constitute second
Absorbing circuit, increases electric capacity B C2 between the switch transformer armature winding of conventional art and reduces primary switch loop area,
This circuit can suppress flat panel TV Switching Power Supply to radiate.
Capacitor C C3 of the present utility model, resistor D R4 collectively form the 3rd absorbing circuit, and this absorbing circuit is
The circuit that the utility model increases between the switch transformer armature winding of conventional art, this absorbing circuit can reduce electricity
The frequency of oscillation of stream (Ids) and voltage (Vds) and amplitude.
When switching tube Q1 close short when, because the electric current on primary inductance coil can not be mutated, △ i/ △ t and
△ u/ △ t is very big, and external radiation interference is strengthened it is therefore desirable to increase absorbing circuit, PCB at primary inductance coil two ends
During typesetting, primary transformers anode reduces spoke to one high voltage thin film electric capacity of row between thermally to reduce primary switch loop area
Blackberry lily is disturbed.
When switching tube Q1 is operated in unlatching, because switching frequency is very high, between the drain electrode of switching tube Q1 and source electrode
△ i/ △ t and △ u/ △ t very big, the frequency of oscillation of voltage (Vds) and amplitude become big, and external radiation interference is strengthened, and therefore exists
Increase braking absorption circuit between the drain electrode of switching tube Q1 and source electrode.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in the utility model
Protection domain within.
Claims (2)
1. a kind of device of suppression flat panel TV Switching Power Supply radiation, including switch transformer (T1) and switching tube (Q1), switchs
Transformer (T1) has supply side coiling group and flat panel TV electricity consumption side coiling group, the supply side coiling group of switch transformer (T1)
On there is the 3rd binding post and the 4th binding post, the flat panel TV electricity consumption side coiling group of switch transformer (T1) has first and connects
Terminal and the second binding post, described first binding post is electrically connected by wire A with DC input, described second binding post and driving
End by wire B, switching tube (Q1) electrically connect it is characterised in that：Also include capacitor A (C1), capacitor B (C2), capacitor D
(C4), resistor A (R1), resistor B (R2), resistor C (R3), resistor E (R5), diode A (D1), diode B (D2),
Magnetic bead A (L1), magnetic bead B (L2), described capacitor A (C1), resistor A (R1), resistor B (R2), resistor C (R3), electric capacity
First terminals of device B (C2) are electrically connected with wire A respectively, the second terminals of described capacitor A (C1) and diode A (D1)
Negative pole end electrically connects, and diode A (D1) positive terminal electrically connected with switching tube (Q1), described resistor A (R1), resistor B (R2),
Second terminals of resistor C (R3) are electrically connected with diode B (D2) negative pole end respectively, diode A (D1) positive terminal and switch
Pipe (Q1) electrical connection, the second terminals of described capacitor B (C2) are thermally electrically connected with power supply, described switching tube (Q1) and power supply
Thermally electrically connect；Described magnetic bead A (L1), first terminals of magnetic bead B (L2) are electrically connected with the second binding post respectively, described magnetic bead
A (L1), second terminals of magnetic bead B (L2) are electrically connected with diode A (D1) positive terminal respectively；Described capacitor D (C4) positive pole
End is electrically connected with the 3rd binding post, and capacitor D (C4) negative pole end is electrically connected with first terminals of resistor E (R5), resistor E
(R5) the second terminals are electrically connected with the 4th binding post.
2. according to a kind of suppression flat panel TV Switching Power Supply radiation described in claim 1 device it is characterised in that：Also include
Capacitor C (C3), resistor D (R4), the first terminals of described capacitor C (C3) are electrically connected with diode A (D1) positive terminal,
Second terminals of described capacitor C (C3) are electrically connected with first terminals of resistor D (R4), and the first of resistor D (R4)
Terminals are thermally electrically connected with power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037825.1U CN205960949U (en) | 2016-09-05 | 2016-09-05 | Device that restraines flat screen television switching power supply radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037825.1U CN205960949U (en) | 2016-09-05 | 2016-09-05 | Device that restraines flat screen television switching power supply radiation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205960949U true CN205960949U (en) | 2017-02-15 |
Family
ID=57979281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621037825.1U Active CN205960949U (en) | 2016-09-05 | 2016-09-05 | Device that restraines flat screen television switching power supply radiation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205960949U (en) |
-
2016
- 2016-09-05 CN CN201621037825.1U patent/CN205960949U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |