CN2350941Y - Electronic ballast for DC metal halide lamp - Google Patents
Electronic ballast for DC metal halide lamp Download PDFInfo
- Publication number
- CN2350941Y CN2350941Y CN 98237080 CN98237080U CN2350941Y CN 2350941 Y CN2350941 Y CN 2350941Y CN 98237080 CN98237080 CN 98237080 CN 98237080 U CN98237080 U CN 98237080U CN 2350941 Y CN2350941 Y CN 2350941Y
- Authority
- CN
- China
- Prior art keywords
- metal halide
- main body
- capacitor
- contact switch
- reactor
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an electric light source device, and more specifically, the utility model relates to an electronic ballast for a DC metal halide lamp. The utility model is composed of a main body and a starting device. The utility model is characterized in that the starting device which is connected with the output end of the main body B comprises a reactor L, a capacitor C, and a contact switch S, wherein, one end of the reactor L is connected with the output end of the main body B, and the other end of the reactor L is connected with the negative output end of the main body B via the capacitor C and the contact switch S which are connected in series. Because the utility model has good starting performance, the energy of the starting pulse can be lowered to a proper value which does not affect the normal operating condition of computer class equipment.
Description
The utility model relates to a kind of electric light source device, specifically metal halide direct current lamp electronic ballast.
Existing metal halide direct current lamp electronic ballast usually adopts the mode that HF filtering capacitor and reactor fixedly are connected in series.The induced potential that such connected mode has not only weakened reactor in start-up course is to the ballast effect of lamp but also need very high-octane high voltage startup pulse, often takes place repeatedly to start failure thereby causes phenomenon such as lamp cavity wall blackening.The useful life and the startability of the metal halide direct current lamp of lamp cavity wall blackening all are subjected to influencing significantly, and the normal operation of normal interference calculation machine equipment.
The purpose of this utility model provides a kind of metal halide direct current lamp electronic ballast with high starting performance.This ballast not only improves it to the startability of metal halide direct current lamp but also significantly be reduced in when starting interference to computer equipment.
The purpose of this utility model is achieved in that it is made up of main body and starting drive, it is characterized in that the starting drive A that links to each other with main body B output comprises reactor L, capacitor C and contact switch S, the end of described reactor L connects main body B output, the negative output terminal that the other end of reactor L is connected to main body B through the capacitor C and the contact switch S of serial connection.
The utility model is by the pass of contact switch S, the connecting mode of incompatible switching HF filtering capacitor C in circuit.When metal halide direct current lamp M did not start or extinguishes, contact switch S was in the disjunction state, and HF filtering capacitor C is inoperative, and the electromotive force of reactor L is applied directly on the metal halide direct current lamp M.After metal halide direct current lamp M is lighted, contact switch S is closed close again, mode that HF filtering capacitor C is switched directly and reactor L is connected in series enters the state of normally lighting a lamp, and good one-shot success performance is arranged.
Owing to the utlity model has good startability, the energy of starting impulse also can be reduced to the appropriate value that does not influence computer equipment normal operating condition.
Accompanying drawing is the utility model circuit structure diagram.
The electric ballast that the utility model proposes below in conjunction with description of drawings.
This electric ballast is made up of main body B (high-frequency inverter) and starting drive, and starting drive comprises reactor L, contact switch S, HF filtering capacitor C, resistor R composition.The end of described reactor L links to each other with the cathode output end of high-frequency inverter B, the other end of L links to each other with the end of described HF filtering capacitor C and the positive pole of metal halide direct current lamp M, the other end of C links to each other with the end of contact switch S, and the other end of S links to each other with the negative pole of the cathode output end of B and M.For the instantaneous short circuit phenomenon of avoiding S to close fashionable HF filtering capacitor C occurs, the two ends of the contact switch S that starting drive is connected in series with capacitor C are connecting resistance R also.Capacitor C is nonpolarity or dc capacitor; Contact switch S is a contact switch.
Claims (4)
1. metal halide direct current lamp electronic ballast, it is made up of main body and starting drive, it is characterized in that the starting drive A that links to each other with main body B output comprises reactor L, capacitor C and contact switch S, the end of described reactor L connects main body B positive output end, the negative output terminal that capacitor C that the other end of reactor L connects through rate and contact switch S are connected to main body B.
2. according to the described metal halide direct current of claim 1 lamp electronic ballast, it is characterized in that starting drive A is linked to each other with the positive pole of metal halide direct current lamp M by reactor L and the capacitor C end that joins, contact switch S that joins with main body B negative output terminal and the negative pole of metal halide direct current lamp M join.
3. according to the described metal halide direct current of claim 1 lamp electronic ballast, it is characterized in that capacitor C is nonpolarity or dc capacitor; Contact switch S is a contact switch.
4. according to the described metal halide direct current of claim 1 lamp electronic ballast, it is characterized in that the contact switch S that starting drive is connected in series with capacitor C two ends can and connecting resistance R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98237080 CN2350941Y (en) | 1998-03-26 | 1998-03-26 | Electronic ballast for DC metal halide lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98237080 CN2350941Y (en) | 1998-03-26 | 1998-03-26 | Electronic ballast for DC metal halide lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2350941Y true CN2350941Y (en) | 1999-11-24 |
Family
ID=33984982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98237080 Expired - Fee Related CN2350941Y (en) | 1998-03-26 | 1998-03-26 | Electronic ballast for DC metal halide lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2350941Y (en) |
-
1998
- 1998-03-26 CN CN 98237080 patent/CN2350941Y/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 | ||
| 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 |