CN2056009U - Electronic ballast with abnormal state protection - Google Patents
Electronic ballast with abnormal state protection Download PDFInfo
- Publication number
- CN2056009U CN2056009U CN 89218714 CN89218714U CN2056009U CN 2056009 U CN2056009 U CN 2056009U CN 89218714 CN89218714 CN 89218714 CN 89218714 U CN89218714 U CN 89218714U CN 2056009 U CN2056009 U CN 2056009U
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- CN
- China
- Prior art keywords
- circuit
- abnormal state
- capacitor
- ballast
- electronic ballast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to a ballast used by a fluorescent lamp. The design provides an electronic ballast with abnormal state protection, which is characterized in that both ends of a resistor r on an RLC circuit are connected with a sampling circuit; the sampling circuit uses current in a capacitor c to be served as a sampling signal; besides, the electronic ballast with abnormal state protection also comprises a resistor R-[1] with a deferred function, a capacitor C-[1], and a relay Z-[1]. The electronic ballast with abnormal state protection of the design has many advantages, in particular to uneasy damage in an abnormal state. The utility model has the advantages of long service life, simplicity and handiness.
Description
The utility model relates to the used ballast of fluorescent lamp field.
Electric ballast is to be used for replacing inductance type ballast to make daylight lamp glow starting, and it is the novel electron equipment that grew up in recent years, and it has the following advantages: the luminous efficiency height; Considerable energy saving efficient (power saving rate is more than 20%); Reduce starting voltage; Improvement startability etc.The existing several years history of China's development electric ballast, manufacturer is many at present, but all there is short shortcoming of life-span in its product, will damage in general 3--4 month, therefore, wishes to have the electric ballast of novel longevity to come out.
The reason that electric ballast damages easily is anti-incessantly abnormal work state, for example fluorescent lamp open circuit; The fluorescent lamp filament breaking; Deexcitation; Especially fluorescent lamp starter not.General ballast also has protective circuit, but effect is bad, how to make anti-abnormal work state and the long-lived not fine yet so far solution of electric ballast.
The design's task is to provide a kind of electric ballast with abnormal condition protection.This electric ballast can not damage under the fluorescent lamp abnormality and longevity.
The design's task is done in such a way that additional sample circuit on the circuit of original electric ballast, and as sampling current, this sample circuit is made up of the RC and the relay that play delayed action with the electric current in the capacitor C of oscillating circuit RLC.
Below in conjunction with accompanying drawing the utility model is elaborated.
Accompanying drawing 1 is an ordinary electronic ballast circuit schematic diagram; Accompanying drawing 2 is circuit diagrams of the utility model electric ballast.
From accompanying drawing 1 as seen, the electric ballast of prior art comprises high-power oscillating tube T1 and T2, resistance R when inductance L, capacitor C and fluorescent lamp conducting etc., constitute oscillating circuit by RLC, oscillating tube T1 and T2 alternate energisation, oscillation efficiency work fluorescent lamp more than 20KC under high frequency.
Because various abnormalities often appear in fluorescent tube, as open circuit, starter etc. not.With starter not is example, and not conducting of fluorescent lamp during starter makes original rlc circuit become lc circuit; its electric current may surpass several times even tens times of primary current; do not having under the situation of safeguard measure, will inevitably damage high-power oscillating tube T1 and T2, so the life-span of electric ballast is short.General electric ballast also has is provided with safeguard measure, and its protective circuit is taken out from b1e1 or b2e2, but when abnormality occurs, the protection poor effect.
In order to reach the good protection effect; the utility model is additional sample circuit on the ordinary electronic ballast; this circuit is connected to the two ends of the r on the RLC oscillating circuit; in the utility model, this resistance r is referred to as sample resistance; this sample resistance is not essential in general electric ballast; there is the purpose of this resistance to be to change Q value in the circuit, during in the prior art if any this resistance, generally also below 10 ohm.Sample circuit of the present utility model is connected to sample resistance r two ends, be exactly with the electric current in the capacitor C as sampled signal, just with the voltage at sample resistance r two ends as sampled signal.The design's sample circuit is made up of the R1C1 and the relay Z1 that play delayed action.Sample resistance r is about 40 ohm among the design, and it is respond well to take a sample, and sees accompanying drawing 2.
Under normal circumstances, when fluorescent lamp is bright, oscillating circuit RLC operate as normal, electric current in the capacitor C is about the 0.2--0.4 peace, and abnormality when not working (as) appears when fluorescent lamp, and rlc circuit becomes lc circuit, and the electric current in the capacitor C can increase several times and even tens of times, because current break is well also not had with the electric current in this capacitor C as sampled signal again.When big like this electric current passes through sample circuit,, the contact K commonly used of relay Z1 is disconnected, cut off the electricity supply, reach the effect of protection ballast through the R1C1 time-delay.
In the sample circuit of the utility model electric ballast, R1 is 300--1000 ohm, and the C1 capacitor is the 100--500 microfarad, and the voltage of relay Z1 is 24 volts.
The utility model electric ballast can replace inductance type ballast to make daylight lamp glow starting, is the novel electron equipment that development in recent years is got up, and has the following advantages: the luminous efficiency height; Energy-saving efficiency is remarkable; Its power saving rate is more than 20%; Starting characteristic is good; Starting voltage is low; After adding sample circuit, not fragile under abnormality, life-saving, the simplicity of design of sample circuit is ingenious.
Claims (1)
1, electric ballast, comprise two high-power oscillating tube T1 and T2, RLC oscillating circuit that resistance R during by inductance L, capacitor C and fluorescent lamp conducting is formed and resistance r etc., it is characterized in that: connect sample circuit at resistance r two ends, this circuit as sampled signal, adds resistance R 1 and the capacitor C 1 and the relay Z1 composition of delayed action with the electric current in the capacitor C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89218714 CN2056009U (en) | 1989-12-02 | 1989-12-02 | Electronic ballast with abnormal state protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89218714 CN2056009U (en) | 1989-12-02 | 1989-12-02 | Electronic ballast with abnormal state protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2056009U true CN2056009U (en) | 1990-04-11 |
Family
ID=4873722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89218714 Withdrawn CN2056009U (en) | 1989-12-02 | 1989-12-02 | Electronic ballast with abnormal state protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2056009U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048145C (en) * | 1992-11-30 | 2000-01-05 | 彼森工程特种机械和仪器制造股份有限公司 | Circuit arrangement for operating a discharge lamp |
| CN102170738A (en) * | 2010-02-25 | 2011-08-31 | 李顺华 | LC ballast for fluorescent lamp |
-
1989
- 1989-12-02 CN CN 89218714 patent/CN2056009U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048145C (en) * | 1992-11-30 | 2000-01-05 | 彼森工程特种机械和仪器制造股份有限公司 | Circuit arrangement for operating a discharge lamp |
| CN102170738A (en) * | 2010-02-25 | 2011-08-31 | 李顺华 | LC ballast for fluorescent lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |