CN206024169U - A kind of high PF circuit of low cost by differential mode test of being struck by lightning - Google Patents
A kind of high PF circuit of low cost by differential mode test of being struck by lightning Download PDFInfo
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- CN206024169U CN206024169U CN201620993960.7U CN201620993960U CN206024169U CN 206024169 U CN206024169 U CN 206024169U CN 201620993960 U CN201620993960 U CN 201620993960U CN 206024169 U CN206024169 U CN 206024169U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of high PF circuit of low cost by differential mode test of being struck by lightning, including being connected in parallel on thyristor regulating optical circuit and π type filter circuits on first pin and the 4th pin of rectifier bridge stack, the second of rectifier bridge stack and the 3rd connects the first test point and the second test point on pin respectively, electric fuse and first resistor are connected with turn between first test point and rectifier bridge stack second pin, second test point is directly connected with the 3rd pin of rectifier bridge stack, is connected with varistor between the first resistor and the 3rd pin.This utility model is provided with a resistance R1 between varistor VR1 and electric fuse F1; when power supply is subject to thunderbolt difference to touch voltage; due to increased a resistance R1 before varistor; the electric current of varistor is flow through in larger reduction; two terminal voltage of metal-oxide-semiconductor when effectively drop is struck by lightning; the purpose of protection metal-oxide-semiconductor is reached, lightning test is easily passed, is reduced the experimental cost by lightning test.
Description
Technical field
This utility model is related to electronic circuit field, more particularly to a kind of high PF electricity of low cost by differential mode test of being struck by lightning
Road.
Background technology
General low PF circuits, have a larger BUCK electric capacity after rectification, due to the ENERGY E=0.5*C*U*U of electric capacity,
, through pressure-sensitive absorption, remaining voltage is larger due to the BUCK electric capacity on low PF, and two end U of electric capacity will not be mutated for thunderbolt voltage, warp
The voltage that crosses after BUCK electric capacity will not exceed pressure (it is usually 600-700V that MOS is pressure) of MOS and damage, very easily logical
(LED power≤25W requires, by 500V, lamp power ＞ 25W, to cross the jamproof requirement of IEC61000-4-5 lightning surges
Ask the test by 1KV).
But high PF circuits, due to after pressure-sensitive without electrochemical capacitor, only one or two CBB electric capacities, although and low PF
Circuit is the same, the varistor for having same specification, but the clamp voltage after varistor is still higher, higher clamper
Voltage superposition often significantly causes MOS to puncture beyond MOS pressure voltages on line voltage, and lightning test 1KV or even 500V are
It is easily detected by.
Be by lightning test, traditional solution substantially have following several, although they also solve high PF thunderbolt
Problem, but there is a problem of following different：
Components and parts are more, relatively costly：Double absorption is carried out to the voltage that is struck by lightning for example with two pressure-sensitive VR1 and VR2, although
After can ensure that residual voltage superposition line voltage, less than the pressure voltage that MOS can bear, pass through lightning test, but due to adopting
Pressure-sensitive with two, space is not only increased, cost is also add, cost performance is not high.
Easily cause the failure of bridge heap：This programme cancels VR1, only retains VR2, although can also pass through to be struck by lightning 500V or even
The difference of 1KV touches test.But also larger quality hidden danger can be brought to bridge heap DB1 simultaneously.Due to the pressure-sensitive VR1 before without rectification, thunder
A very big surge current is had when hitting by bridge heap BD1, when user place uses, the natural thunder of the little higher voltage of experience
Hit, bridge heap fails, and causes customer complaint.
Lightning test fails：There are some schemes to easily lead to MOS or the MOS failures being built in IC.
Therefore need to be improved existing high PF circuits.
Utility model content
This utility model technical issues that need to address are to provide a kind of high PF that can pass through lightning test of low cost
Circuit.
This utility model is realized in：A kind of high PF circuit of low cost by differential mode test of being struck by lightning, including controllable
Silicon light adjusting circuit and π type filter circuits, the thyristor regulating optical circuit and π type filter circuits are connected in the two of rectifier bridge stack in parallel
Individual first and the 4th on pin, and the second of the rectifier bridge stack and the 3rd connects the first test point and second respectively on pin and survey
Pilot, is connected with electric fuse and first resistor in turn between first test point and rectifier bridge stack second pin, and described second
Test point is directly connected with the 3rd pin of rectifier bridge stack, is connected with varistor between the first resistor and the 3rd pin.
Preferably, varistor of the varistor using model 07D471.
Preferably, the power bracket of first resistor described in the first resistor is 1/2W-2W, and resistance value scope is 3R3-
20R.
Preferably, the thyristor regulating optical circuit includes the 3rd resistor being connected in series and the second electric capacity, the 3rd electricity
Resistance is connected with the first pin of the rectifier bridge stack, and second electric capacity is connected with the 4th pin of the rectifier bridge stack.
Preferably, the 3rd resistor resistance is 1K, and the electrical quantity of second electric capacity is 683/450V.
Preferably, the π types filter circuit includes the first electric capacity, the 3rd inductance and the 3rd electric capacity, the 3rd inductance with
After 3rd capacitances in series in parallel with first electric capacity again after be connected on the rectifier bridge stack.
Preferably, the electrical quantity of first electric capacity and the 3rd electric capacity is respectively 104/450V and 683/450V.
Preferably, the two ends of the 3rd inductance are also parallel with the vibration that second resistance is used for suppressing the 3rd inductance.
Compared with correlation technique, this utility model is provided with a resistance R1 between varistor VR1 and electric fuse F1,
When power supply is subject to thunderbolt difference to touch voltage, due to increased a resistance R1 before varistor, so can be with larger reduction stream
Cross the electric current of varistor.According to flowing through, varistor electric current is less, and pressure-sensitive clamp voltage is lower, so can effectively drop thunder
Two terminal voltage of metal-oxide-semiconductor when hitting, reaches the purpose of protection metal-oxide-semiconductor, easily passes lightning test, reduce by lightning test
Experimental cost.
Description of the drawings
Fig. 1 is a kind of circuit theory diagrams of the low cost of this utility model by the high PF circuits of differential mode test of being struck by lightning.
Crucial electrical parameter forms of the Fig. 2 for 07D471 varistors.
Fig. 3 compares curve chart for the pressure limiting of varistor.
Specific embodiment
Below in conjunction with drawings and embodiments, the utility model is described in further detail.
Several basic definitions are simply introduced first:Lightning test is exactly the survey for being simulated thunderbolt to Electrical and Electronic equipment
Examination, its objective is to set up an evaluation Electrical and Electronic equipment antisurge interference performance by the method for simulation test of being struck by lightning
Common standard.
High PF circuits：PF refers to power factor (PF), and high PF circuits mean high-power factor circuit, has in high PF circuits
Varistor.
Crucial electrical parameters of the Fig. 2 for varistor, pressure of the pressure-sensitive electronics in the present embodiment using model 07D471
Quick electronics, as can be seen from Figure when the electric current at 07D471 varistors two ends is 1mA, two end maximum voltage of varistor is
470V*1.1=517V, but electric current, when reaching 10A, two end maximum voltage of varistor is 775V.It can be seen that with pressure
The electric current at two end of quick resistance increases, and the clamp voltage at two end of varistor is increasing, and the clamp voltage of varistor is higher, can lead
Cause the voltage for being added in bis- ends of MOS higher, the easier failure of lightning test.
Intuitively can be found out by Fig. 3, with the increase of dash current, the varistor pressure limiting ratio of same specification is got over
Greatly, so limiting voltage can also increase.The varistor of such as 7D471, under 5A electric currents, it is 1.5*470=to limit voltage
705V；Under 50A electric currents, it is 2.2*470=1034V to limit voltage；The restriction voltage of varistor is higher, is superimposed upon metal-oxide-semiconductor
On voltage also higher.So high PF circuits want easily to touch test by difference of being struck by lightning, only try every possible means to reduce dash current.
Electric current=difference is touched due to difference and touches voltage ÷ (2+X) (X be connected between live wire, zero line DC impedance), 2 Ω are electric
When resistance is that difference touches test, lightning test instrument internal is automatically generated, and it is EMC (Electro magnetic that difference touches voltage
Compatibility, electromagnetic compatibility) require, it is impossible to change.We can be seen that by above-mentioned computing formula and only need to increase X, and
Increasing X is required nothing more than, as long as increase the resistance being connected between live wire (L lines), zero line (N lines) will make much can not lead to originally
The difference that crosses touches lightning test, easily passes through.
This utility model is improved in the reasoning of above theory.
Fig. 1 is referred to, a kind of high PF circuit of low cost by differential mode test of being struck by lightning, including thyristor regulating optical circuit and π types
Filter circuit, the thyristor regulating optical circuit and π type filter circuits are connected in first pin 1 of rectifier bridge stack DB1 and in parallel
On four pins 4, connect the first test point TP1 respectively in the second pin 2 of the rectifier bridge stack DB1 and the 3rd pin 3 and (be connected on L
On line) and the second test point TP2 (being connected on N lines), rectifier bridge stack BD1 is used for can direct current output by exchange input conversion；Described
It is connected with electric fuse F1 and first resistor R1, the F1 between first test point TP1 and rectifier bridge stack DB1 second pins 2 in turn
When power supply occurs abnormal, the high current occurred during circuit abnormality can be cut off in time, the excessively thermally-induced fire of power supply is prevented；Described
One resistance R, R1 resistances and power determine that regarding practical situation its power bracket is 1/2W-2W, resistance value 3R3-20R, i.e.,
Between -20 Europe, 3.3 Europe；Second test point TP2 is directly connected with the 3rd pins 3 of rectifier bridge stack DB1, first resistor R1
Varistor VR1, varistors of the varistor VR1 using model 07D471, pressure is connected between the 3rd pin 3
Quick resistance VR1 effects are clamper lightning surge voltage, it is to avoid higher than MOS energy on circuit below after thunderbolt voltage superposition line voltage
The voltage for bearing, causes MOS voltage breakdowns and damages, and such resistance R1 is located between varistor VR1 and electric fuse F1, works as electricity
When source is subject to thunderbolt difference to touch voltage, as a resistance R1 is increased before varistor, so pressure can be flow through with larger reduction
The electric current of quick resistance, according to flowing through, varistor electric current is less, and pressure-sensitive clamp voltage is lower, when so effectively can drop thunderbolt
Two terminal voltage of metal-oxide-semiconductor, reaches the purpose of protection metal-oxide-semiconductor.
Specifically, the thyristor regulating optical circuit is used for providing latching current to controllable silicon and maintains electric current, it is ensured that controllable
Silicon is constantly in conducting state, it is to avoid controllable silicon electric current is flashed less than electric current is maintained, and which includes the 3rd resistor being connected in series
R3 and the second electric capacity CB2；3rd resistor R3 is connected with first pin 1 of the rectifier bridge stack DB1, second electric capacity
CB2 is connected with the 4th pin 4 of the rectifier bridge DB1 heaps.Wherein, the 3rd resistor R3 resistance be 1K, second electric capacity
The electrical quantity of CB2 is 683/450V.
The π types filter circuit is used for suppressing difference to touch interference, and which includes the first electric capacity CB1, the electricity of the 3rd inductance L3 and the 3rd
Hold CB3, be connected to after the 3rd inductance L3 is in parallel with the first electric capacity CB1 again after connecting with the 3rd electric capacity CB3 described whole
On stream bridge heap DB1.The electrical quantity of wherein described first electric capacity CB1 and the 3rd electric capacity CB3 is respectively 104/450V and 683/450V.
The two ends of the 3rd inductance CB3 are also parallel with second resistance R2, for suppressing the vibration of the 3rd inductance L3, improve EMI
Performance.
Compared with correlation technique, this utility model is provided with a resistance R1 between varistor VR1 and electric fuse F1,
When power supply is subject to thunderbolt difference to touch voltage, due to increased a resistance R1 before varistor, so can be with larger reduction stream
Cross the electric current of varistor.According to flowing through, varistor electric current is less, and pressure-sensitive clamp voltage is lower, so can effectively drop thunder
Two terminal voltage of metal-oxide-semiconductor when hitting, reaches the purpose of protection metal-oxide-semiconductor.An inexpensive plug-in unit resistance so merely add, easily
By lightning test, the experimental cost by lightning test is reduced.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, every
The equivalent structure that is made using this utility model description and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in
Other related technical fields, are included in scope of patent protection of the present utility model in the same manner.
Claims (8)
1. the high PF circuits that a kind of low cost is tested by the differential mode that is struck by lightning, it is characterised in that including thyristor regulating optical circuit and π types
Filter circuit, the thyristor regulating optical circuit and π type filter circuits are connected in parallel on first pin and the 4th pin of rectifier bridge stack,
The second of the rectifier bridge stack and the 3rd connects the first test point and the second test point on pin respectively, first test point with
Be connected with electric fuse and first resistor between rectifier bridge stack second pin in turn, second test point directly with rectifier bridge stack
Three pins connect, and are connected with varistor between the first resistor and the 3rd pin.
2. a kind of high PF circuits that low cost is tested by the differential mode that is struck by lightning as claimed in claim 1, it is characterised in that the pressure
Varistor of the quick resistance using model 07D471.
3. high PF circuit of a kind of low cost by differential mode test of being struck by lightning as claimed in claim 1, it is characterised in that described the
The power bracket of one resistance is 1/2W-2W, and resistance value scope is 3R3-20R.
4. as claimed in claim 1 a kind of low cost by be struck by lightning differential mode test high PF circuits, it is characterised in that described can
Control silicon light adjusting circuit includes 3rd resistor and the second electric capacity being connected in series, the 3rd resistor and the first of the rectifier bridge stack
Pin connects, and second electric capacity is connected with the 4th pin of the rectifier bridge stack.
5. high PF circuit of a kind of low cost by differential mode test of being struck by lightning as claimed in claim 4, it is characterised in that described the
Three resistances are 1K, and the electrical quantity of second electric capacity is 683/450V.
6. a kind of high PF circuits that low cost is tested by the differential mode that is struck by lightning as claimed in claim 1, it is characterised in that the π
Type filter circuit includes the first electric capacity, the 3rd inductance and the 3rd electric capacity, after the 3rd inductance and the 3rd capacitances in series again with institute
It is connected on the rectifier bridge stack after stating the parallel connection of the first electric capacity.
7. high PF circuit of a kind of low cost by differential mode test of being struck by lightning as claimed in claim 6, it is characterised in that described the
The electrical quantity of one electric capacity and the 3rd electric capacity is respectively 104/450V and 683/450V.
8. high PF circuit of a kind of low cost by differential mode test of being struck by lightning as claimed in claim 6, it is characterised in that described the
The two ends of three inductance are also parallel with second resistance, for suppressing the vibration of the 3rd inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620993960.7U CN206024169U (en) | 2016-08-30 | 2016-08-30 | A kind of high PF circuit of low cost by differential mode test of being struck by lightning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620993960.7U CN206024169U (en) | 2016-08-30 | 2016-08-30 | A kind of high PF circuit of low cost by differential mode test of being struck by lightning |
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| Publication Number | Publication Date |
|---|---|
| CN206024169U true CN206024169U (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620993960.7U Active CN206024169U (en) | 2016-08-30 | 2016-08-30 | A kind of high PF circuit of low cost by differential mode test of being struck by lightning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206024169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999627A (en) * | 2020-08-04 | 2020-11-27 | 苏州浪潮智能科技有限公司 | MOS (Metal oxide semiconductor) tube verification fixed framework based on voltage drop circuit and verification method |
-
2016
- 2016-08-30 CN CN201620993960.7U patent/CN206024169U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999627A (en) * | 2020-08-04 | 2020-11-27 | 苏州浪潮智能科技有限公司 | MOS (Metal oxide semiconductor) tube verification fixed framework based on voltage drop circuit and verification method |
| CN111999627B (en) * | 2020-08-04 | 2022-12-16 | 苏州浪潮智能科技有限公司 | MOS (Metal oxide semiconductor) tube verification fixed framework based on voltage drop circuit and verification method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Low -cost high PF circuit through test of thunderbolt differential mode Effective date of registration: 20170627 Granted publication date: 20170315 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd Pledgor: FOSHAN TOPDAY PHOTOELECTRIC SCIENCE & TECHNOLOGY CO., LTD. Registration number: 2017440000045 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191120 Granted publication date: 20170315 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd Pledgor: FOSHAN TOPDAY PHOTOELECTRIC SCIENCE & TECHNOLOGY CO., LTD. Registration number: 2017440000045 |