CN2439764Y - Current compensation, high power factor electronic ballast - Google Patents
Current compensation, high power factor electronic ballast Download PDFInfo
- Publication number
- CN2439764Y CN2439764Y CN 00221597 CN00221597U CN2439764Y CN 2439764 Y CN2439764 Y CN 2439764Y CN 00221597 CN00221597 CN 00221597 CN 00221597 U CN00221597 U CN 00221597U CN 2439764 Y CN2439764 Y CN 2439764Y
- Authority
- CN
- China
- Prior art keywords
- power factor
- current compensation
- high power
- electronic ballast
- capacitor
- 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)
- Rectifiers (AREA)
Abstract
The utility model provides a current compensation, high power factor electronic ballast, which can decrease the harmonic content of an input end and enhance the power factor of the input end. The current compensation, high power factor electronic ballast comprises a low frequency rectifying filter circuit, a switch output circuit and a choke coil. The current compensation, high power factor electronic ballast is characterized in that one connecting wire of a load is mutually connected with one of two input wires; a capacitor C1 is connected between one of the two input wires and the anode of a filtering capacitor C3; a capacitor C2 is connected between the other input wires of the two input wires and the cathode of the filtering capacitor C3. Thus, a current compensation branch circuit is formed.
Description
The utility model relates to and a kind of input current being compensated to reduce Harmonics of Input, improves the electric ballast of input power factor.
At present, the employed electric ballast of fluorescent lamp is a kind of to be the reactive factor calibration function, it is by current rectifying and wave filtering circuit, self-maintained circuit, light fluorescent lamp by choke, its shortcoming is that Harmonics of Input is big, and the input power factor is low, cause the peak current of circuit big, neutral line current is big; Another kind has power factor emendation function, but power factor correction realize by special circuit, cause cost height, reliability low.
The purpose of this utility model then is the problem that exists at above-mentioned prior art, and a kind of reduction input harmonic content is provided, and improves the current compensation high power factor electronic ballast of input power factor.
The purpose of this utility model can reach by following measure:
A kind of current compensation high power factor electronic ballast, comprise low frequency current rectifying and wave filtering circuit, switch output circuit, choke, the wiring that it is characterized in that load and two incoming lines wherein one link to each other, connect a capacitor C 1 between the positive pole of one of two incoming lines and filter capacitor C3, connect a capacitor C 2 between another root of two incoming lines and the negative pole of filter capacitor C3, constitute the current compensation branch road.
Advantage of the present utility model is as follows:
Owing to adopted technique scheme, the electric ballast input current is compensated, and the input power factor is improved, and because the technical program line of reconfiguration only increases by two electric capacity, thereby the cost of realization High Power Factor is extremely low, the reliability height, long working life.
Its line design not only can be used for all kinds of ballasts such as fluorescent lamp, high pressure sodium lamp, gaseous discharge lamp, also can be applicable to exchange a dc transformating power.
Fig. 1 is the utility model electrical schematic diagram.
Below in conjunction with accompanying drawing the utility model is further described:
At designed current compensation high power factor electronic ballast, when A or B point voltage are lower than diode D1, D2, D3, the D4 rectification, during the filtered voltage of capacitor C 3, the low-frequency current of input is zero, but because T1, T2 are HF switch, load is connected to the B point, capacitor C 1, C2 provide the high frequency branch road, the capacitor C 4 energy storage effect of having connected with load, thereby still have the high-frequency current input this moment, the high-frequency current of input is equivalent to low-frequency current is compensated, make total input current near sinusoidal, thereby reduced harmonic content, improved the input power factor.
Claims (1)
1. current compensation high power factor electronic ballast, comprise low frequency current rectifying and wave filtering circuit, switch output circuit, choke, the wiring that it is characterized in that load and two incoming lines wherein one link to each other, connect a capacitor C 1 between the positive pole of one of two incoming lines and filter capacitor C3, connect a capacitor C 2 between another root of two incoming lines and the negative pole of filter capacitor C3, constitute the current compensation branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221597 CN2439764Y (en) | 2000-08-31 | 2000-08-31 | Current compensation, high power factor electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221597 CN2439764Y (en) | 2000-08-31 | 2000-08-31 | Current compensation, high power factor electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2439764Y true CN2439764Y (en) | 2001-07-18 |
Family
ID=33586467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00221597 Expired - Fee Related CN2439764Y (en) | 2000-08-31 | 2000-08-31 | Current compensation, high power factor electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2439764Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1822744B (en) * | 2006-03-21 | 2010-06-16 | 东阳得邦照明有限公司 | Automatic detecting and compensating circuit for single and double lamps |
-
2000
- 2000-08-31 CN CN 00221597 patent/CN2439764Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1822744B (en) * | 2006-03-21 | 2010-06-16 | 东阳得邦照明有限公司 | Automatic detecting and compensating circuit for single and double lamps |
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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 |