CN201398260Y - Short-circuit overloading safety device of electronic ballast circuits - Google Patents
Short-circuit overloading safety device of electronic ballast circuits Download PDFInfo
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- CN201398260Y CN201398260Y CN200920138006XU CN200920138006U CN201398260Y CN 201398260 Y CN201398260 Y CN 201398260Y CN 200920138006X U CN200920138006X U CN 200920138006XU CN 200920138006 U CN200920138006 U CN 200920138006U CN 201398260 Y CN201398260 Y CN 201398260Y
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- Prior art keywords
- resistor
- safety device
- electronic ballast
- circuit
- inductor
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 9
- 239000002966 varnish Substances 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical group [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims 1
- 101100493820 Caenorhabditis elegans best-1 gene Proteins 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 2
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009730 filament winding Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 240000007320 Pinus strobus Species 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
A short-circuit overloading safety device of electronic ballast circuits relates to a short-circuit overloading safety device of small power electric appliances, and in particular to a short-circuit overloading safety device used for common low power electronic ballast circuits. The utility model provides an improved short-circuit overloading safety device of electronic ballast circuits, which isprovided with a ferrite inductor and a fuse resistor, wherein the ferrite inductor is connected with the fuse resistor in series, when in use, the device is serially connected in the power supply input end of an electronic ballast circuit, the wire diameter of a coil enameled wire of the inductor is best Phi 0.07-0.15 mm, a direct current resistance value corresponding to the coil is best 30-7 ohms, and correspondingly the damaging time is >= 0.5 s under the 23-7 A current. The fuse resistor can be a conventional common flame-proof notch groove resistor, the power thereof is best 1/4 W or 1/6W, the resistance value is best 0.7-3 ohms, and correspondingly the fuse time is <=0.3 s and >= 0.1 s under 23-7 A.
Description
Technical field
The utility model relates to a kind of short circuit overload safety device of low-power electrical device, especially a kind of short circuit overload safety device that is used for common low power electronics ballasting circuit.
Background technology
Electric ballast is the important component part of all kinds of fluorescent lamps and electronic energy-saving lamp, is used for the current limliting and the startup of fluorescent tube.The quality of its performance directly has influence on the use of fluorescent lamp, particularly fail safe.The same with other electrical equipment, for safety, all need to be provided with power safety device, but electric ballast there is its particularity:
1. if electric ballast in use damages, generally do not repair, all design the blowout current of insurance resistance (pipe) greatlyyer usually, transship and the majority that burns out is a transistor.
2. electric ballast is used on the engineering, be sometimes hundreds of only, or even several thousand start simultaneously and use, at this moment impulse current is very big, in order to prevent the networking tripping operation, except that adopting high power factor, small light increases certain impedance in input circuit.
3. particularly the interior ballasting circuit of electronic energy-saving lamp is owing to be subjected to the restriction in space for electric ballast, and element is intensive usually, and spot pitch is very little, in case there is electric arc to produce, be easy to take place circuit board blast, when serious can fluorescent lamp fried split, cause dangerous accident.
4. the working temperature of electric ballast is higher, and the ballasting circuit of integrated lamp reaches 120～130 ℃ sometimes, thereby very high to electrolytic capacitor and the requirement of transistorized heatproof, is working in long-time high temperature, occurs sometimes damaging or short circuit phenomenon.
For the dangerous accident that prevents that above-described short circuit overload and heavy current impact from causing, the regular producer that has is at the power input serial connection protector of electronic ballast circuit, as the Philip filament winding resistance of in the 11W circuit for lamp, connecting, the GE product glass-tube fuse of in the 8W circuit for lamp, connecting.What the exported product of the present most producers of China was used is the filament winding fuse-resistor fuselage, and the reliability of this fuse-resistor fuselage is higher than single common glass-tube fuse.
The applicant provides a kind of short circuit overload safety device of electronic ballast circuit in the utility model patent of notification number for CN2785309Y, be provided with at least 1 series connection or/and noninductive resistor in parallel, at least 1 series connection is or/and fusing resistor in parallel, two resistors are connected in series, and are external in the power input of electronic ballast circuit.Do not have cutting on the resistor body, increased the sectional area of conductive layer as far as possible, enlarge radiating surface, the temperature rise that makes it whole conductive layer is slowed down, and has improved the breaking current value that opens circuit, and can not fuse when opening circuit to 0.2s.Fusing resistor utilizes cutting to dwindle the sectional area of conductive layer as far as possible, reduces area of dissipation, makes the temperature concentration of local, can instantaneous fusing when break, overload.When circuit breaker is transshipped, can limit electric current and infinitely increase, can play the double action of instantaneous fusing again, avoid demolishing electrical appliance on the whole because of arc discharge.
Summary of the invention
The purpose of this utility model is to provide a kind of short circuit overload safety device of improved electronic ballast circuit.
The utility model is provided with a ferrite inductor and a fusing resistor, a ferrite inductor and a fusing resistor series connection, and the utility model is serially connected with the power input of electronic ballast circuit during use.
The coil varnish envelope curve line footpath of described inductor is Φ 0.07～0.15mm preferably, and the corresponding direct current resistance of coil is preferably 30～7 Ω, corresponding damage time 〉=0.5s under 23～7A electric current.
Described fusing resistor can be conventional common fire-retardant cutting resistor, and its power is preferably 1/4W or 1/6W, and resistance value is preferably 0.7～3 Ω, corresponding under 23～7A electric current fusing time≤0.3s and 〉=0.1s (25 ± 2 ℃).
The magnetic core of described inductor can be I shape or E type, and material is manganese-zinc ferrite or nickel-zinc ferrite, and coil is the copper enamelled wire.
Described resistor can be carbon film, oxide-film, metal film constant resistance device, and skin is sealed with fire-retarding insulation lacquer, and this resistor is with fire-retardant outer tube or heat-shrinkable T bush during application.
The circuit that the utility model adopts inductor and resistor in series to form replaces insurance wire-wound resistor or the protective tube in the circuit in the past.Because in fact described inductor is same as conventional filter inductor; just enamelled wire line footpath and D.C. resistance there is certain requirement; therefore this inductor not only strobes; and rise and protect metering function; as long as select suitable line footpath; keep desired thermal capacity, make it when the maximum limit flow valuve, guarantee not melt at 0.5s interior loop insulating varnish.As the inductance that a D.C. resistance is 10 Ω, be that 23A adds the induction reactance current limliting in 230V voltage current limliting, actual maximum current can be littler, when short circuit, can not produce the hard arc of harmfulness in the fusing resistor fusing process, promptly guarantees Electrical Safety.
In addition since in the number of turns of cutting on the resistor conducting film generally more than 1.2 circles, can shorten the fusing time that big electric current passes through, this resistance value is generally 0.7～3 Ω, its blowout current＞0.5A.After this resistor and inductor tandem compound are insurance circuit, totally should bear the 0.5A operating current and 10 μ F electrolytic capacitors discharge and recharge impact.Resistance is 0.7～3 Ω, when corresponding electric current is 23～7A, this resistor fusing time is 0.1～0.3s, and the D.C. resistance of the inductor of corresponding coupling is 7～30 Ω, be 10 times of fusing resistor resistance, flow down inductance coil insulating varnish fusing time＞0.5s in respective electrical, the anti-high current impulse withstanding capability of inductor is strong more than fusing resistor.Therefore work as circuit and be subjected to heavy current impact in short-term, at first fusing is the less fusing resistor of resistance, rather than the bigger inductor of resistance, the inductor that resistance is big plays metering function in whole failure process, the short circuit current of unlimited increase is clamped down on, guaranteed that fusing resistor can not be subjected to the heavy current impact more than the 20A when fusing, thereby the security incident of having avoided the hard arc discharge to be produced.Its operation principle is that the impedance of inductor is big and difficult by big electric current damage, thus the metering function of playing, the generation of the hard arc when preventing resistor fusing; The anti-high current impulse withstanding capability of fusing resistor is little, and fusing is fast, can cut off electric current rapidly, thereby play reliable insurance function.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
As shown in Figure 1, the utility model is provided with a ferrite inductor L and a fusing resistor R, a ferrite inductor L and a fusing resistor R series connection, and the utility model is serially connected with the power input of electronic ballast circuit during use.The circuit that the utility model adopts inductor and resistor in series to form replaces insurance wire-wound resistor or the protective tube in the circuit in the past.
The coil varnish envelope curve line of inductor directly adopts Φ 0.07～0.15mm, and the corresponding direct current resistance of coil is about 30～7 Ω, corresponding damage time 〉=0.5s under 23～7A electric current.
Fusing resistor adopts conventional common fire-retardant cutting resistor, and its power is 1/4W or 1/6W, and resistance value is about 0.7～3 Ω, corresponding under 23～7A electric current fusing time≤0.3s and 〉=0.1s (25 ± 2 ℃).
Described inductor is exactly a conventional filter inductance type in electric ballast and the electricity-saving lamp, mainly is I shape or E type, and material is manganese-zinc ferrite or nickel-zinc ferrite, and coil is the copper enamelled wire.Different is that D.C. resistance and line are directly had requirement, and corresponding with the enamelled wire diameter of inductor from 1～15W (ballast power) is Φ 0.07～0.15mm, and its direct current resistance is corresponding to be 30～7 Ω.The selection of this electrical quantity is to guarantee that inductor has that current limitation effect and insulating varnish hot molten time are long preferably.
Described resistor is common cutting resistor, can be carbon film, oxide-film, metal film constant resistance layer, and its resistance is 0.7～3 Ω, and power is 1/4W and 1/6W, and skin is sealed with fire-retarding insulation lacquer, and this resistor is with fire-retardant outer tube or heat-shrinkable T bush during application.
Practical application is that inductor and resistor two devices are directly inserted on the pcb board, and with element immersed solder such as other diodes, two devices become the series connection shape to be connected between power end and the rectification circuit after the immersed solder.
Example 1:230V, 3～15W ballasting circuit is corresponding with the enamelled wire diameter of inductor to be Φ 0.07～0.15mm, the direct current resistance of coil is corresponding to be 30～7 Ω, should be 0.7～3 Ω mutually with the resistor value of its coupling.
Example 2:120V, 5～13W ballasting circuit is corresponding with the enamelled wire diameter of inductor to be Φ 0.09～0.15mm, the direct current resistance of coil is corresponding to be 27～7 Ω, should be 2.7～7 Ω mutually with the resistor value of its coupling.
The utility model is suitable for the insurance of small-power 15W or following ballasting circuit and the usefulness of filtering, and can reach standard-required.
Claims (6)
1. the short circuit overload safety device of electronic ballast circuit is characterized in that being provided with a ferrite inductor and a fusing resistor, a ferrite inductor and a fusing resistor series connection.
2. the short circuit overload safety device of electronic ballast circuit as claimed in claim 1 is characterized in that the coil varnish envelope curve line of described inductor directly is Φ 0.07～0.15mm, and the corresponding direct current resistance of coil is 30～7 Ω.
3. the short circuit overload safety device of electronic ballast circuit as claimed in claim 1 is characterized in that described fusing resistor is fire-retardant cutting resistor, and its power is 1/4W or 1/6W, and resistance value is 0.7～3 Ω.
4. the short circuit overload safety device of electronic ballast circuit as claimed in claim 1 or 2, the magnetic core that it is characterized in that described inductor is I shape or E type.
5. the short circuit overload safety device of electronic ballast circuit as claimed in claim 1 or 2, the magnetic core that it is characterized in that described inductor is manganese-zinc ferrite core or ferrite core of nickel-zinc.
6. as the short circuit overload safety device of claim 1 or 3 described electronic ballast circuits, it is characterized in that described resistor is carbon film resistor, film oxide resistor or metal film resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920138006XU CN201398260Y (en) | 2009-04-30 | 2009-04-30 | Short-circuit overloading safety device of electronic ballast circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920138006XU CN201398260Y (en) | 2009-04-30 | 2009-04-30 | Short-circuit overloading safety device of electronic ballast circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201398260Y true CN201398260Y (en) | 2010-02-03 |
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ID=41620791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920138006XU Expired - Fee Related CN201398260Y (en) | 2009-04-30 | 2009-04-30 | Short-circuit overloading safety device of electronic ballast circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201398260Y (en) |
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2009
- 2009-04-30 CN CN200920138006XU patent/CN201398260Y/en not_active Expired - Fee Related
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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 |
Granted publication date: 20100203 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |