CN201590936U - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN201590936U CN201590936U CN2010200155264U CN201020015526U CN201590936U CN 201590936 U CN201590936 U CN 201590936U CN 2010200155264 U CN2010200155264 U CN 2010200155264U CN 201020015526 U CN201020015526 U CN 201020015526U CN 201590936 U CN201590936 U CN 201590936U
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- CN
- China
- Prior art keywords
- circuit
- resistance
- capacitor
- power supply
- connects
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an electronic ballast. The electronic ballast comprises a filtering circuit, a rectifying circuit and an inverting circuit which are electrically connected; the filtering circuit which is a second-order active band-pass filtering circuit comprises a low-pass circuit, a high-pass circuit and an amplifying circuit; the low-pass circuit comprises a resistor R1 and a capacitor C1, one end of the resistor R1 is connected with one end of a power supply, and the other end of the resistor R1 is electrically connected with the high-pass circuit and the amplifying circuit and is also connected with the other end of the power supply by the capacitor C1. As a Gamma-type passive filtering circuit is designed into the active filtering circuit, the filtering effect is better, and the power factor of a lamp tube is higher and can be up to 0.98.
Description
Technical field
The utility model relates to a kind of electric ballast, belongs to electronic technology field.
Background technology
Circuit of electronic ballast generally includes filter circuit, rectification circuit and the inverter circuit of electrical connection.For 36-40W fluorescent tube circuit of electronic ballast, the Γ mode filter that filter circuit generally is made up of filter inductor and capacitor, electric ballast uses this filter circuit, the frequency range of filtering is narrow, filter effect is not obvious, power factor is low, can not satisfy national L grade standard.The lamp tube current crest is than higher, and generally all greater than 1.7, fluorescent tube turns black easily, and light decay is bigger, and lamp tube service life is shortened.
The utility model content
Problem to be solved in the utility model is at above problem, and a kind of good wave filtering effect is provided, a kind of electric ballast that power factor is high.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of electric ballast, the filter circuit, rectification circuit and the inverter circuit that comprise electrical connection, it is characterized in that: described filter circuit is the active bandwidth-limited circuit of second order, comprises low pass circuit, high pass circuit and amplifying circuit;
Low pass circuit comprises resistance R 1 and capacitor C 1, and an end of resistance R 1 connects an end of power supply, and the other end and high pass circuit, amplifying circuit are electrically connected and connect through capacitor C 1 other end of power supply.
As further improvement in the technical proposal:
Described high pass circuit comprises resistance R 3 and capacitor C 2, and an end of capacitor C 2 connects the other end of resistance R 1, and the other end of capacitor C 2 is electrically connected and connects through resistance R 3 other end of power supply with amplifying circuit.
Described amplifying circuit comprises operational amplifier IC, resistance R 4 and resistance R 5, the other end of the positive input terminal capacitor C 2 of operational amplifier IC, negative input end connects the other end of power supply and connects the output of operational amplifier IC through resistance R 5 through resistance R 4, is provided with resistance R 2 between the other end of the output of operational amplifier IC and resistance R 1.
The utility model adopts technique scheme, and have the following advantages: Γ type passive filter circuit is set to active filter circuit, and filter effect is better, and the power factor of fluorescent tube is higher, can reach 0.98.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is the circuit diagram of electric ballast among the utility model embodiment.
Among the figure,
The 1-filter circuit, 2-rectification circuit, 3-inverter circuit, 4-low pass circuit, 5-high pass circuit, 6-amplifying circuit, 7-fluorescent tube.
Embodiment
Embodiment, as shown in the figure, a kind of electric ballast comprises filter circuit 1, rectification circuit 2 and inverter circuit 3 and the fluorescent tube 7 of electrical connection, filter circuit 1 is the active bandwidth-limited circuit of second order, comprises low pass circuit 4, high pass circuit 5 and amplifying circuit 6;
High pass circuit 5 comprises resistance R 3 and capacitor C 2, and an end of capacitor C 2 connects the other end of resistance R 1, and the other end of capacitor C 2 and amplifying circuit 6 are electrically connected and connect through resistance R 3 other end of power supply.
Amplifying circuit 6 comprises operational amplifier IC, resistance R 4 and resistance R 5, the other end of the positive input terminal capacitor C 2 of operational amplifier IC, negative input end connects the other end of power supply and connects the output of operational amplifier IC through resistance R 5 through resistance R 4, is provided with resistance R 2 between the other end of the output of operational amplifier IC and resistance R 1.
The output of an input concatenation operation amplifier IC of rectification circuit 2, another input of rectification circuit 2 connects the other end of power supply, and inverter circuit 3 connects fluorescent tube 7.
Claims (3)
1. electric ballast, the filter circuit (1), rectification circuit (2) and the inverter circuit (3) that comprise electrical connection, it is characterized in that: described filter circuit (1) is the active bandwidth-limited circuit of second order, comprises low pass circuit (4), high pass circuit (5) and amplifying circuit (6);
Low pass circuit (4) comprises resistance R 1 and capacitor C 1, and an end of resistance R 1 connects an end of power supply, and the other end and high pass circuit (5), amplifying circuit (6) are electrically connected and connect through capacitor C 1 other end of power supply.
2. a kind of electric ballast as claimed in claim 1, it is characterized in that: described high pass circuit (5) comprises resistance R 3 and capacitor C 2, one end of capacitor C 2 connects the other end of resistance R 1, and the other end of capacitor C 2 and amplifying circuit (6) are electrically connected and connect through resistance R 3 other end of power supply.
3. a kind of electric ballast as claimed in claim 2, it is characterized in that: described amplifying circuit (6) comprises operational amplifier IC, resistance R 4 and resistance R 5, the other end of the positive input terminal capacitor C 2 of operational amplifier IC, negative input end connects the other end of power supply and connects the output of operational amplifier IC through resistance R 5 through resistance R 4, is provided with resistance R 2 between the other end of the output of operational amplifier IC and resistance R 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200155264U CN201590936U (en) | 2010-01-19 | 2010-01-19 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200155264U CN201590936U (en) | 2010-01-19 | 2010-01-19 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590936U true CN201590936U (en) | 2010-09-22 |
Family
ID=42750731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200155264U Expired - Fee Related CN201590936U (en) | 2010-01-19 | 2010-01-19 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590936U (en) |
-
2010
- 2010-01-19 CN CN2010200155264U patent/CN201590936U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20150119 |
|
| EXPY | Termination of patent right or utility model |