CN2416709Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN2416709Y CN2416709Y CN 99242510 CN99242510U CN2416709Y CN 2416709 Y CN2416709 Y CN 2416709Y CN 99242510 CN99242510 CN 99242510 CN 99242510 U CN99242510 U CN 99242510U CN 2416709 Y CN2416709 Y CN 2416709Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- switching circuit
- hid
- load
- network
- 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
Links
- 230000006978 adaptation Effects 0.000 claims abstract description 8
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses an electronic ballast for HID gas discharge lamp. The circuit board consists of a rectifying filter circuit, a switch circuit, a dynamic adaptation network, a high voltage generating device and the like. The dynamic adaptive network is characterized in that a dynamic adaptive network is arranged between the switching circuit and the load, so that the load can stably work in the impedance change process. The stability of the circuit and the electric energy utilization efficiency are improved.
Description
The utility model relates to the electric ballast that gaseous discharge lamps such as a kind of high-pressure sodium lamp, Metal halogen lamp, fluorescent lamp are used.
Now, electric ballast has begun on probation in fields such as high-pressure sodium lamp, Metal halogen lamps.It mainly is by power circuit, switching circuit, high-voltage pulse produces compositions such as circuit, its operation principle is: power circuit becomes civil power direct current (also can insert as required power factor (PF) adjust circuit) to convert high-frequency alternating current to through switching circuit through rectifying and wave-filtering to produce circuit (coil) through high-voltage pulse, light gaseous discharge lamp (to call HID in the following text), this electron-like ballast, for example Chinese " electronics newspaper " 99 years the tenth first phases disclosed " high-pressure sodium electronic lamp ballast ", the high-frequency alternating current that switching circuit produces directly produces coil supply HID through high-voltage pulse, and (the high-voltage pulse coil is finished high pressure and is triggered, play the inductor of restriction lamp current behind the HID build-up of luminance), this form, the tube voltage of supplying with HID is all the time less than the output voltage of switching circuit, just there is a problem in this, make HID energy steady operation, just must supply with switching circuit, make switching circuit that higher output voltage be arranged with higher DC power supply voltage.But efficient is reduced, and energy consumption increases.
When using than low dc voltage, owing to HID extinguishes because of internal factor causes the tube voltage fluctuation in the course of the work, can not steady operation.
At the problems referred to above, the purpose of this utility model is to improve the dynamic adaptation of the input impedance of switching circuit output impedance and HID, and a kind of high efficiency is provided, the HID electron rectifier of energy steady operation.
For achieving the above object, solution of the present utility model is: be provided with one and dynamically become the resistance adaptation network in above-mentioned electric ballast, the switching circuit output is connected with HID by this network, eliminate the HID tube voltage and change the phenomenon of extinguishing that causes.
A kind of is an inductance and electric capacity to be connected the back with 7 shapes insert between switching circuit output and the high-voltage pulse coil, and the resonance potential amplitude of utilizing inductance capacitance changes with the impedance of HID, obtains the dynamic adaptation with the HID impedance.Can certainly insert boost type leakage inductance power transformation device between switching circuit and the high-voltage pulse coil, the output voltage that utilizes leakage inductance transformer obtains dynamic adaptation with the characteristic that the impedance of HID becomes.
Owing to adopted the dynamic adaptation network in the above-mentioned solution, thereby can reduce the supply power voltage of switching circuit, and can make the HID steady operation, so circuit efficiency is higher.Can also isolate and reduce the influence of high-voltage pulse switching circuit.
The utility model is described in further detail below in conjunction with accompanying drawing and experimental example:
Figure (1) is the circuit theory diagrams of the utility model first embodiment.
Figure (2) is the circuit theory diagrams of the utility model second embodiment.
Referring to figure (1) D
1～D
4And C
1Form current rectifying and wave filtering circuit, the direct voltage of switching circuit work is provided, switching circuit is by T
1, T
2, B, D
5, C
2The half-bridge series connection auto-excitation type circuit of forming is by L
4, C
37 fonts of forming dynamically become resistance network and R
5, D
6, C
5, D
7, L
6, L
5The high-voltage pulse circuit of forming, load circuit is by gas discharge lamp HID and capacitance C
4Form.Civil power is through D
1-D
4Rectifying and wave-filtering becomes direct current to supply with by T
1, T
2, the switching circuit formed of B, T
1, T
2At trigger tube D
5Exciting under, produce alternate conduction and produce high frequency square wave and output to L
4With C
3The resonance of forming becomes the resistance network, because HID this moment does not excite conducting to be equivalent to open circuit, L
4, C
3The voltage of output is very high, through R
5, D
6Rectification is to C
5Be charged to silicon two-terminal switch D
7Breakover voltage, D
7Produce the tunnel conducting, at L
6Induce transient magnetic field, L
5By with L
6Mutual inductance obtain high-voltage pulse and act on the HID two ends, make it to excite build-up of luminance, the HID conducting, impedance descends, pulling L
4, C
3Output voltage descends, C
5Both end voltage also drops to less than D
7Breakover voltage and quitting work.L
4With C
3Output voltage follow the tracks of the impedance of HID and change.Make switching circuit and HID reach dynamic adaptation, HID can normally stably be worked.
Referring to figure (2), switching circuit adopts parallel connection excitement auto-excitation type half-bridge inversion circuit, and output is connected to leakage inductance boost type transformer B
2, its course of work is; T
1With T
2Be subjected to D
5The triggering for generating alternate conduction, the output square wave is by L
4Be coupled to L
8, through resistance R
5Be transferred to L
3, L
3Coupling L
1And L
2Act on T with the positive feedback form
1, T
2Form self-oscillation.The switching circuit square wave is through L
4With L
7Leakage inductance coupling back output because L
7On induced voltage can change along with the impedance variation of load, so leakage inductance transformer also has dynamic change resistance ability.Can be fit to adaptive between HID and the switching circuit.This circuit remainder is the same with (1) embodiment.
Claims (3)
1, a kind of electric ballast is made up of power circuit, switching circuit, high-voltage pulse generation device, it is characterized in that having a motional impedance adaptation network, and this network links to each other with the switching circuit output.
2, electric ballast according to claim 1 is characterized in that the impedance network has an inductance that is serially connected with between switching circuit output and load and the high-tension coil input, and the electric capacity that is in parallel with load and high-tension coil.
3, electric ballast according to claim 1 is characterized in that the impedance network has a leakage inductance transformer that boosts that is connected between switching circuit and load and the high-tension coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99242510 CN2416709Y (en) | 1999-08-26 | 1999-08-26 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99242510 CN2416709Y (en) | 1999-08-26 | 1999-08-26 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2416709Y true CN2416709Y (en) | 2001-01-24 |
Family
ID=34029116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99242510 Expired - Fee Related CN2416709Y (en) | 1999-08-26 | 1999-08-26 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2416709Y (en) |
-
1999
- 1999-08-26 CN CN 99242510 patent/CN2416709Y/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 |