CN2205091Y - Electronic ballast with high power factor - Google Patents
Electronic ballast with high power factor Download PDFInfo
- Publication number
- CN2205091Y CN2205091Y CN 93220137 CN93220137U CN2205091Y CN 2205091 Y CN2205091 Y CN 2205091Y CN 93220137 CN93220137 CN 93220137 CN 93220137 U CN93220137 U CN 93220137U CN 2205091 Y CN2205091 Y CN 2205091Y
- Authority
- CN
- China
- Prior art keywords
- electronic ballast
- power factor
- capacitor
- high power
- circuit
- 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 with a high power factor, which relates to the improvement of an electronic ballast. A filtering capacitor is removed in the existing electronic ballast, and a tank circuit network is connected with the output end of a rectification circuit, which is composed of a capacitor and a diode. The blocking time of a line current is reduced when the tank circuit network is used by the electronic ballast, and consequently, the power factor is increased. The utility model has the advantages of simple structure and low cost.
Description
The utility model relates to a kind of electric ballast.
Present at the electric ballast that uses, by rectification circuit, filter capacitor, inverter circuit, current limiting element is formed, and the power frequency civil power is supplied with tube load again through rectification, filtering after inverter circuit is reverse into high frequency, and this electric ballast remains the low problem of power factor.
In view of above-mentioned, the purpose of this utility model aims to provide a kind of high power factor electronic ballast with low cost.
Technical solution of the present utility model is that the filter capacitor in the primary electron ballast is removed, and the accumulator network of being made up of electric capacity and diode in the output connection of rectification circuit forms.Utilize high frequency that the accumulator network is charged and reduce the deadline of line current, realize improving the purpose of power factor.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is a kind of physical circuit figure of the present utility model.
Thick black line partly is the accumulator network among the figure, and it is by the capacitor C that is in series
41, C
42, the diode D that is in series
42, capacitor C
43With the diode D that is connected to two series circuit mid points
41The H type circuit network that constitutes, this network links to each other with rectification circuit output end A, B, and C, D are electronic ballast output end among the figure, connect tube load.
The power frequency civil power is through rectification circuit D
1～D
4After being rectified into direct current, be reverse into high-frequency electrical,, supply with fluorescent tube again through current limiting element L by inverter circuit, and the C in the accumulator
41, C
42Be the capacitance of fluorescent tube, again to capacitor C
43Play the effect of charging dividing potential drop, when the power frequency supply instantaneous voltage was higher, high-frequency current was at C
41With C
42Mid point is introduced accumulator, passes through D
41To C
43The charging energy storage, when the power frequency supply instantaneous voltage is low, C
43Pass through D
42Release energy, provide DC power supply, make inverter continue operate as normal, guarantee lamp luminescence to inverter.For guaranteeing the fluorescent tube stable start, be preferably in capacitor C
41Two end parallel resistance R
41(as shown in Figure 1).Usually, can be at D
41Seal in voltage stabilizing didoe or resistance in the branch road, so that to playing the fine setting effect deadline of line current.
Because the capacitor C in the accumulator network
43Charging voltage be the high frequency voltage of taking after inversion, when the current potential of accumulator input D is lower than C
43The time, because of D
41Existence, can not be to C
43Charging, institute is so that C
43Charging interval elongate, reduce the deadline of line current, thereby improved power factor.This electric ballast is simple in structure, and is with low cost.
Claims (3)
1, a kind of high power factor electronic ballast contains rectification circuit, inverter circuit, and current limiting element is characterized in that also containing accumulator, this accumulator is by the capacitor C that is in series
41, C
42, the diode D that is in series
42, capacitor C
43With the diode D that is connected to the series circuit mid point
41The H type circuit network that constitutes, itself and rectification circuit output end [A, B] link to each other.
2, by the described electric ballast of claim 1, it is characterized in that resistance R is arranged
41With capacitor C
41In parallel.
3, by the described electric ballast of claim 1, it is characterized in that D at H type circuit network
41Seal in voltage stabilizing didoe or resistance in the branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93220137 CN2205091Y (en) | 1993-08-04 | 1993-08-04 | Electronic ballast with high power factor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93220137 CN2205091Y (en) | 1993-08-04 | 1993-08-04 | Electronic ballast with high power factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205091Y true CN2205091Y (en) | 1995-08-09 |
Family
ID=33799359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93220137 Expired - Fee Related CN2205091Y (en) | 1993-08-04 | 1993-08-04 | Electronic ballast with high power factor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205091Y (en) |
-
1993
- 1993-08-04 CN CN 93220137 patent/CN2205091Y/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 |