CN2290967Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN2290967Y CN2290967Y CN 95201575 CN95201575U CN2290967Y CN 2290967 Y CN2290967 Y CN 2290967Y CN 95201575 CN95201575 CN 95201575 CN 95201575 U CN95201575 U CN 95201575U CN 2290967 Y CN2290967 Y CN 2290967Y
- Authority
- CN
- China
- Prior art keywords
- rectifier bridge
- transistor
- diode
- direct current
- 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.)
- Expired - Fee Related
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an electronic ballast which is the successive patent to the 'Electronic Ballast (patent number 91108951.9 and 91225694. X) ' in China patent. The electronic ballast is mainly used for a gas discharge lamp; diodes V< 5 >, V< 6 >, inductor L< 3 >, and a capacitor C< 2 > are added to a circuit construction; thus, a low-frequency alternating current can be converted to a high-frequency alternating current, and voltage can be raised. The defects of difficult start-up with low voltage and high wave crest ratio of the previous patent can be solved, so that the technical index of the utility model can reach the standard IEC-929.
Description
The utility model is a kind of electric ballast, is mainly used in gaseous discharge lamp.
The utility model is the patent that continues of Chinese patent " electric ballast " (patent No. 91108951.9 and 91225694.X).Though above-mentioned two patents have obtained high power factor and low electric current high order harmonic component composition, be difficult for when existing supply voltage on the low side starting and bigger two shortcomings of crest.The utility model is at general electric ballast, is about to low frequency ac and converts direct current to, converts on the circuit structure basis of high-frequency ac electrically-ignited fluorescent tube again, it is characterized in that having increased diode V
5, V
6, inductance L
3, capacitor C
2, so just convert low frequency ac to high-frequency alternating current, the direct voltage after the rectification is promoted, solve aforementioned patent low voltage starting difficulty and crest than high shortcoming, thereby realized the purpose of this utility model.The first, improve the starting characteristic under the low-voltage, its when supply voltage is low (be lower than line voltage permissible variation scope, this phenomenon is a common phenomenon in China's electrical network) still can be started and operate as normal.The second, improve the crest factor in fluorescent tube loop, make it less than 1.7.The utility model has just reached international IEC-929 standard-required fully like this.
The utility model is achieved in that one of power supply lead wire connects inductance L
1An end, L
1Other end tandem electric inductance L
3An end, L
3Another termination rectifier diode V
1, V
5Positive pole and V
2Negative pole, another power supply lead wire connects inductance L
2An end, L
2Another termination rectifier diode V
3, V
6Positive pole and V
4Negative pole, capacitor C
1Be connected across between power supply two lead-in wires, just L
1, L
2Respectively and between two terminals joining of power supply lead wire, capacitor C
3Be connected across L
1, L
2Two other terminal between, V
1And V
3Negative pole and transistor V
7Drain electrode, capacitor C
3An end and 6 pin of an oscillation module M link to each other V
2, V
4Positive pole and another one transistor V
8Source electrode, capacitor C
4An end and 5 pin of module M link to each other transistor V
7Source electrode and V
82 pin and wall with module M after drain electrode links to each other flow diode V
5, V
6Negative pole link to each other 1 pin of module M and transistor V
7Grid join 3 pin of M and transistor V
3Grid link to each other 4 pin and the inductance L of M
4An end link to each other L
4The other end link to each other with load Rp one end, the Rp other end is received capacitor C
3With C
4On the tie point of serial connection.If (gaseous discharge lamp has filament to need preheating, then L
4Filament one lead-in wire of the other end and load Rp one end link to each other another lead-in wire and the capacitor C of this filament
5An end and the other end of thermistor Rt link to each other C
5The other end and a lead-in wire of another termination Rp other end filament of thermistor Rt, another lead-in wire of this filament meets C
3With C
4On the tie point of serial connection), described oscillation module M is an one drive circuit, it mainly acts on is to produce a high-frequency driving signal to open, close transistor V in turn
7, V
8Make it light and keep work by output supply load one high-frequency electrical energy, this module can be made up of discrete component, also may form by integrated circuit, 6 function terminals are generally arranged, and its 6 end, 5 ends are power supply terminal, and 1,3 ends are the drive signal output, 2 is intermediate terminal, and 4 is output.
Basic circuit structure of the present utility model such as Fig. 1, Fig. 2, its operation principle is as follows: the power supply alternating current is through V
1, V
2, V
3, V
4The bridge rectification of forming is by the capacitor C of series connection
3With C
4Give oscillation module M and transistor V for direct current after the filtering
7, V
8, module M makes V
8, V
7In turn conducting and ending is through inductance L
4Give load Rp for high-frequency alternating current, and fluorescent tube Rp is started and work, simultaneously through V
5, V
4, V
2, V
6The bridge of forming converts 50Hz or 60Hz low frequency ac the high-frequency alternating current of tens Hz to, again V
2, V
1, V
3, V
4Rectifier bridge converts direct current to, and direct current is again through V
7, V
9, M converts high frequency supply load Rp to.Like this, when supply voltage was on the low side, as long as an energized, one had vibration to produce in the circuit, by V
1, V
2, V
3, V
4The ac input end of the rectifier bridge of forming produces the alternating current of a high frequency, and this electric energy produces a very high direct voltage after rectification.Under this voltage, late-class circuit is starting load and keep operate as normal smoothly just, and the crest factor of load current also can drop to below 1.7 simultaneously, thereby has realized the purpose of this utility model.
Best enforcement of the present utility model illustrates main feature of the present utility model now in conjunction with the embodiments as Fig. 1, Fig. 2.
Characteristics of the present utility model, the filter inductance L that is in AC power
1Afterwards, increase an inductance L again
3Be L
1One termination L
3An end, L
3Another termination V
1, V
5, positive pole and V
2The tie point of negative pole on, C
2Be connected across inductance L
1And L
3Tie point and L
2With V
3, V
6Positive pole and V
4The tie point of negative pole between, V
5, V
6, negative pole receive transistor V after linking to each other
7Source electrode and the tie point of drain electrode on, perhaps V
5, V
6Negative pole also can directly receive outputting inductance L after linking to each other
4Not with terminal that load Rp links to each other on.
The utility model can also be realized by another scheme, as shown in Figure 2, and V
5, V
6Negative pole be connected in brilliant pipe V
9Drain electrode on, V
5Source electrode receive the DC power supply negative terminal of rectification output, and V
9Grid then by other oscillator N control, when power on circuitry after, control V like this by N
9Conducting or by also can realizing that low frequency ac converts the purpose of high-frequency alternating current to.
By above circuit structure diagram and principle Analysis as can be seen, principal character of the present utility model be exactly the ballast input by diode (V
1, V
2, V
3, V
4) introduce one by inductance (L before first rectifier bridge of forming
3), electric capacity (C
2) loop formed, wherein inductance (L
3) be serially connected in rectifier bridge and import an end, electric capacity (C
2) at inductance (L
3) be attempted by before between described rectifier bridge two ac input ends, increase by two diode (V
5, V
6) with aforementioned rectifier bridge in diode (V
2, V
4) second rectifier bridge of composition, the direct current output plus terminal of this described second rectifier bridge is received on the HF switch, utilize the in turn ground connection of this HF switch or connect the low frequency ac that high pressure will be input in the circuit to convert high-frequency alternating current to, again level work behind power supply road after the rectification.
Fig. 3 and Fig. 4 are the embodiment circuit diagram of oscillation module M in the utility model, and wherein Fig. 3 is made up of discrete component, and Fig. 4 is by integrated circuit I '
CM1Form.
Claims (4)
1, the utility model is a kind of electric ballast, is mainly used in gaseous discharge lamp, converts low frequency ac to direct current, converts high-frequency ac electrically-ignited fluorescent tube again to, it is characterized in that: the ballast input by diode (V
1, V
2, V
3, V
4) introduce one by inductance (L before first rectifier bridge of forming
3), electric capacity (C
2) loop formed, increase by 2 diode (V again
5, V
6) with aforementioned rectifier bridge in 2 rectifier diode (V
2, V
4) second rectifier bridge of composition, the direct current output plus terminal of this described rectifier bridge is received on the HF switch, utilize the in turn ground connection of this HF switch or connect the low frequency ac that high pressure will be input in the circuit to convert high-frequency alternating current to, again level work behind power supply road after the rectification.
2,, it is characterized in that in described second rectifier bridge by diode (V according to the described electric ballast of claim 1
5, V
6) terminal formed can directly be connected on transistor V in the ballast
7Source electrode and transistor V
8The contact that links to each other of drain electrode on.
3, according to the described electric ballast of claim 1, its feature is that also the direct current output plus terminal of described second rectifier bridge can receive another one transistor (V
9) drain electrode on, and this described transistor (V
9) source electrode connect rectification output DC source negative pole, its positive pole is controlled by another one oscillator (N).
4, according to the described electric ballast of claim 1, its feature is that also the direct current output plus terminal of described second rectifier bridge can directly receive inductance (L
4) an other terminal that does not join with load (Rp) on.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201575 CN2290967Y (en) | 1995-02-07 | 1995-02-07 | Electronic ballast |
| BR9503863A BR9503863A (en) | 1995-02-07 | 1995-08-30 | Power supply unit for discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201575 CN2290967Y (en) | 1995-02-07 | 1995-02-07 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2290967Y true CN2290967Y (en) | 1998-09-09 |
Family
ID=5084620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95201575 Expired - Fee Related CN2290967Y (en) | 1995-02-07 | 1995-02-07 | Electronic ballast |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN2290967Y (en) |
| BR (1) | BR9503863A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693340A (en) * | 2020-12-01 | 2021-04-23 | 合肥华耀电子工业有限公司 | Function integrated type vehicle-mounted charger and working method thereof |
-
1995
- 1995-02-07 CN CN 95201575 patent/CN2290967Y/en not_active Expired - Fee Related
- 1995-08-30 BR BR9503863A patent/BR9503863A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693340A (en) * | 2020-12-01 | 2021-04-23 | 合肥华耀电子工业有限公司 | Function integrated type vehicle-mounted charger and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9503863A (en) | 1997-05-27 |
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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 |