CN205029570U - Can anti 20KV switching power supply of thunderbolt - Google Patents
Can anti 20KV switching power supply of thunderbolt Download PDFInfo
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- CN205029570U CN205029570U CN201520841090.7U CN201520841090U CN205029570U CN 205029570 U CN205029570 U CN 205029570U CN 201520841090 U CN201520841090 U CN 201520841090U CN 205029570 U CN205029570 U CN 205029570U
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Abstract
The utility model relates to a can anti 20KV switching power supply of thunderbolt mainly includes anti lightning surge circuit and switching power supply main circuit, anti lightning surge circuit is including the piezo -resistor VR1, thermistor NTC, fuse F1, the common mode filtration noise inductance L1 that establish ties and loop in in proper order, inductance L1's front end parallel resistance R23 and R24's current circuit, shunt capacitance CX simultaneously, the parallelly connected small dimension piezo -resistor VR2 in rear end of inductance L 1, inductance L1's both ends parallel resistance R26 and R27, the rectifier module of anti lightning surge circuit rear end linked switch power main circuit. The transformer unit of switching power supply main circuit adopt internal shield and outside shielding module reduction power once incline and the secondary side between the leakage current. The utility model discloses thunderbolt that can anti 20KV, anti lightning surge circuit forms effective protection to the power, does not influence the firm output of power simultaneously.
Description
Technical field
The utility model relates to field of switch power, particularly relate to a kind of can the Switching Power Supply of anti-20KV thunderbolt.
Background technology
Along with popularizing of various domestic electronic appliances, Switching Power Supply application is more and more extensive, the requirement of market to Switching Power Supply is also more and more higher, regular tap power supply designs and does not reach market demands in lightning Protection, major part can only reach 6KV thunderbolt Distribution Test, some products even do not reach minimum 1KV requirement, the large portion of the Switching Power Supply that market is sold just is not come into the market by surge test, do not do anti-lightning surge effective protection measure, by to the investigation of marketing users with fact proved, as TV set-top box is powered, television set, the equipment such as DVD, under the severe multiple environment of regional thunder and lightning, season as multiple in Summer Lightning, high voltage surge enters electrical network, enter Switching Power Supply L, N holds, the damage of some Switching Power Supplies is caused not work, have influence on the use of family and industrial equipment, also cause certain hidden danger simultaneously, Chang Huixian causes power supply to damage, equipment is caused to work, life-span is short, the lifestyle device needs of industry-by-industry and the people cannot be met.
Utility model content
In order to solve the problems of the technologies described above, provide a kind of can the Switching Power Supply of anti-20KV thunderbolt, the invention provides following technical scheme:
A kind of can the Switching Power Supply of anti-20KV thunderbolt, comprise rectification module, main circuit conversion module, secondary commutation voltage reduction module, voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module, described rectification module input termination AC network, output and main circuit conversion module, secondary commutation voltage reduction module connects successively, described secondary commutation voltage reduction module is by voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module is connected to main circuit conversion module and forms feedback circuit, described secondary commutation voltage reduction module exports as Switching Power Supply exports,
Described rectification circuit front end is also connected with anti-lightning surge circuit, described anti-lightning surge circuit comprise connect successively and form piezo-resistance VR1, the thermistor NTC in loop, fuse F1, common mode filter noise inductance L 1, the series circuit of front end parallel resistance R23 and the R24 of described inductance L 1, simultaneously shunt capacitance CX, the rear end small dimension piezo-resistance VR2 in parallel of described inductance L 1, the two ends parallel resistance R26 of described inductance L 1 and R27, when there is surge impact in electrical network in power supply AC end, discharge through NTC and VR1 series circuit, first via NTC current limliting, inrush current is reduced, instantaneous short circuit electric discharge is carried out again by VR1, front input front end is by surge filtering, because lightning surge voltage energy is enough large, reach 20KV, so residual scurry into back end of line time, moment inverse electromotive force can be produced in common mode filtered noise inductance L 1 coil of power supply, inverse electromotive force can with the surge voltage superposition of original electrical network, produce larger surge to damage inner circuit pack, so the two ends parallel discharge resistance of L1 inductance in the line, to consume the moment induced voltage produced, the small dimension piezo-resistance VR2 in parallel in L1 rear end simultaneously, with the residual voltage that discharge type consumption is scurried into, reach when to introduce surge impact between electrical network L and N line and power supply is effectively protected, do not affect the stable output of product simultaneously.
Adopt transformer unit in described main circuit conversion module internal shield and exterior shield module reduce the leakage current between primary side and secondary side, described internal shield module is the winding and Copper Foil that increase between former limit and secondary, and draw the place of working that an end receives former limit, described exterior shield module is be close to magnetic core and the coated one deck Copper Foil of winding in the outside of transformer, this one deck Copper Foil will close, and forms a loop checking installation.Winding or Copper Foil is increased between former limit and secondary, drawing an end receives above the place of working on former limit, main purpose is that the common mode interference signal on former limit is back to harassing and wrecking source by screen, if there is no this screen, there is a common mode interference signal will be delivered to secondary by the layer capacitance between former vice-side winding, thus cause the EMI problem of output.The leakage inductance magnetic field of transformer is not closed in magnetic core inside, but leaks into space outerpace, and when frequency applications, stronger stray field can induce voltage on the closed-loop path at input and output port, causes EMI test result to be deteriorated.If there is exterior shield layer, according to electromagnetic induction principle, in screen, can electric current be induced, form contrary magnetic field, offset the impact of Magnetic Leakage Field of Transformer.
Beneficial effect of the present invention is: anti-lightning ability promotes greatly, the highest can anti-20KV lightning surge, can available protecting power supply, do not affect the stable output of product simultaneously.
Accompanying drawing explanation
Fig. 1, anti-lightning surge circuit schematic diagram
Fig. 2, circuit structure block diagram of the present utility model
The Transformer Winding schematic diagram of Fig. 3, the utility model embodiment
Embodiment
As Figure 1-3 a kind of can the Switching Power Supply of anti-20KV thunderbolt, comprise rectification module, main circuit conversion module, secondary commutation voltage reduction module, voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module, described rectification module input termination AC network, output and main circuit conversion module, secondary commutation voltage reduction module connects successively, described secondary commutation voltage reduction module is by voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module is connected to main circuit conversion module and forms feedback circuit, described secondary commutation voltage reduction module exports as Switching Power Supply exports,
Described rectification circuit front end is also connected with anti-lightning surge circuit, described anti-lightning surge circuit comprise connect successively and form piezo-resistance VR1, the thermistor NTC in loop, fuse F1, common mode filter noise inductance L 1, the series circuit of front end parallel resistance R23 and the R24 of described inductance L 1, simultaneously shunt capacitance CX, the rear end small dimension piezo-resistance VR2 in parallel of described inductance L 1, the two ends parallel resistance R26 of described inductance L 1 and R27, when there is surge impact in electrical network in power supply AC end, discharge through NTC and VR1 series circuit, first via NTC current limliting, inrush current is reduced, instantaneous short circuit electric discharge is carried out again by VR1, front input front end is by surge filtering, because lightning surge voltage energy is enough large, reach 20KV, so residual scurry into back end of line time, moment inverse electromotive force can be produced in common mode filtered noise inductance L 1 coil of power supply, inverse electromotive force can with the surge voltage superposition of original electrical network, produce larger surge to damage inner circuit pack, so the two ends parallel discharge resistance of L1 inductance in the line, to consume the moment induced voltage produced, the small dimension piezo-resistance VR2 in parallel in L1 rear end simultaneously, with the residual voltage that discharge type consumption is scurried into, reach when to introduce surge impact between electrical network L and N line and power supply is effectively protected, do not affect the stable output of product simultaneously.
The method of internal shield and exterior shield that adopts transformer unit in described main circuit conversion module reduces the leakage current between primary side and secondary side, described internal shield for increase winding and Copper Foil between former limit and secondary, and draw the place of working that an end receives former limit, described exterior shield is be close to magnetic core and the coated one deck Copper Foil of winding in the outside of transformer, this one deck Copper Foil will close, and forms a loop checking installation.Winding or Copper Foil is increased between former limit and secondary, drawing an end receives above the place of working on former limit, main purpose is that the common mode interference signal on former limit is back to harassing and wrecking source by screen, if there is no this screen, there is a common mode interference signal will be delivered to secondary by the layer capacitance between former vice-side winding, thus cause the EMI problem of output.The leakage inductance magnetic field of transformer is not closed in magnetic core inside, but leaks into space outerpace, and when frequency applications, stronger stray field can induce voltage on the closed-loop path at input and output port, causes EMI test result to be deteriorated.If there is exterior shield layer, according to electromagnetic induction principle, in screen, can electric current be induced, form contrary magnetic field, offset the impact of Magnetic Leakage Field of Transformer.
The winding method of described inside transformer shielding comprises winding E1, N1, E2, N2, N3, E3 of carrying out successively;
The coiling step of described winding E1 is, S11: first at transformer framework two ends difference coiling 1Ts marginal belt; S12: coiling width is the gum of 13mm between the marginal zone of both sides, affixes the Teflon sleeve pipe of 30L, and described Teflon sleeve upper end is positioned at gum medium position, and lower end, to marginal belt half position, arranges the lead-in wire of 0.16mm in Teflon sleeve pipe;
S13: Copper Foil is wound in Teflon pipe upper end position, the coiling number of turns is 0.9Ts;
S14: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 2.2Ts;
The coiling step of described winding N1 is, S21: at transformer framework two ends difference coiling 3Ts marginal belt;
S22: the enamelled wire one end by the Furtulon sleeve pipe box of 28L in diameter being 0.35mm, described Furtulon sleeve length of tube is to the half of marginal belt;
S23: coiling enamelled wire, the coiling number of turns is 38Ts;
S24: after enamelled wire coiling completes, equally the Teflon sleeve pipe of 28L on other end cover, described Furtulon sleeve length of tube to edge to half;
S25: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 2.2Ts;
The coiling step of described winding E2 is, S31: at transformer framework two ends difference coiling 1Ts marginal belt; S32: coiling width is the gum of 13mm between the marginal zone of both sides, affixes the Teflon sleeve pipe of 30L, and described Teflon sleeve upper end is positioned at gum medium position, and lower end, to marginal belt half position, arranges the lead-in wire of 0.16mm in Teflon sleeve pipe;
S33: Copper Foil is wound in Teflon pipe upper end position, the coiling number of turns is 0.9Ts;
S34: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 2.2Ts;
The coiling step of described winding N2 is, S41: overturn by transformer, primary side is towards coil winding machine;
S42: at transformer framework two ends difference coiling 6Ts marginal belt;
S43: coiling diameter is the heavy insulation enamelled wire of 0.6mm, two enamelled wire coilings simultaneously, two heavy insulation enamelled wires are enclosed within the Teflon sleeve pipe of a 16L by point of incoming cables, described heavy insulation enamelled wire coiling 5Ts, and outlet still puts the Teflon pipe of 16L;
S44: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 2.2Ts;
S45: two 16L Teflon Guan Wei in step S43 are put the Teflon pipe of 13L again by one end that wheat draws adhesive tape to wrap up;
The coiling step of described winding N3 is, S51: at transformer framework two ends difference coiling 1Ts marginal belt;
S52: two strands of diameters are the enamelled wire coiling 5Ts of 0.2mm; Middle close around;
S53: the Teflon sleeve pipe putting 26L, length is to marginal belt half position;
S54: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 3.2Ts;
The coiling step of described winding E3 is, S61: suppressed by Copper Foil on gum, coiling 0.9Ts;
S62: the Teflon sleeve pipe of 30L from the 0.16mm lead-in wire cover that Copper Foil is drawn, length is to marginal belt half position;
S63: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 2.2Ts;
The winding method of described exterior shield comprises the following steps, S71: outside is close to magnetic core and is wrapped wheat and draw adhesive tape, and the coiling number of turns is 3Ts;
S72: coiling winding E4, Copper Foil is suppressed on gum, wrap up whole winding technique 1.1Ts;
S73: the Teflon sleeve pipe of 30L from the 0.16mm lead-in wire cover that Copper Foil is drawn, length by solder joint to transformer pin;
S74: coiling width is that the wheat of 15mm draws adhesive tape, and the coiling number of turns is 3.2Ts;
S75: skin is wrapped wheat and drawn adhesive tape.
Claims (1)
1. one kind can the Switching Power Supply of anti-20KV thunderbolt, comprise rectification module, main circuit conversion module, secondary commutation voltage reduction module, voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module, described rectification module input termination AC network, output and main circuit conversion module, secondary commutation voltage reduction module connects successively, described secondary commutation voltage reduction module is by voltage monitoring stability contorting module, Voltage Feedback control module, PWM control module is connected to main circuit conversion module and forms feedback circuit, described secondary commutation voltage reduction module exports as Switching Power Supply exports,
It is characterized in that: described rectification circuit front end is also connected with anti-lightning surge circuit, described anti-lightning surge circuit comprise connect successively and form piezo-resistance VR1, the thermistor NTC in loop, fuse F1, common mode filter noise inductance L 1; The series circuit of front end parallel resistance R23 and the R24 of described inductance L 1, simultaneously shunt capacitance CX; The rear end small dimension piezo-resistance VR2 in parallel of described inductance L 1; The two ends parallel resistance R26 of described inductance L 1 and R27; Adopt transformer unit in described main circuit conversion module internal shield and external screen module reduce the leakage current between primary side and secondary side, described internal shield module is the winding and Copper Foil that increase between former limit and secondary, and draw the place of working that an end receives former limit, described exterior shield module is be close to magnetic core and the coated one deck Copper Foil of winding in the outside of transformer, this one deck Copper Foil will close, and forms a loop checking installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520841090.7U CN205029570U (en) | 2015-10-27 | 2015-10-27 | Can anti 20KV switching power supply of thunderbolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520841090.7U CN205029570U (en) | 2015-10-27 | 2015-10-27 | Can anti 20KV switching power supply of thunderbolt |
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| Publication Number | Publication Date |
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| CN205029570U true CN205029570U (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520841090.7U Expired - Fee Related CN205029570U (en) | 2015-10-27 | 2015-10-27 | Can anti 20KV switching power supply of thunderbolt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207501A (en) * | 2015-10-27 | 2015-12-30 | 丹阳奇烨科技有限公司 | Switching power supply capable of resisting 20 KV lightning strokes |
| CN106058400A (en) * | 2016-06-24 | 2016-10-26 | 德清利维通讯科技股份有限公司 | Combiner with lightning protection function |
-
2015
- 2015-10-27 CN CN201520841090.7U patent/CN205029570U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207501A (en) * | 2015-10-27 | 2015-12-30 | 丹阳奇烨科技有限公司 | Switching power supply capable of resisting 20 KV lightning strokes |
| CN106058400A (en) * | 2016-06-24 | 2016-10-26 | 德清利维通讯科技股份有限公司 | Combiner with lightning protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20201027 |