CN104883802A - Ballast circuit - Google Patents
Ballast circuit Download PDFInfo
- Publication number
- CN104883802A CN104883802A CN201510292550.XA CN201510292550A CN104883802A CN 104883802 A CN104883802 A CN 104883802A CN 201510292550 A CN201510292550 A CN 201510292550A CN 104883802 A CN104883802 A CN 104883802A
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- circuit
- electric capacity
- diode
- power factor
- factor correction
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Abstract
The invention discloses a ballast circuit comprising a filter circuit, a rectifier circuit, a power factor correction circuit, a startup circuit, and a resonant circuit. The filter circuit is sequentially connected with the rectifier circuit, the power factor correction circuit, the startup circuit and the resonant circuit. The power factor correction circuit is further connected with the resonant circuit. The power factor correction circuit includes a differential-mode inductor L2, diodes D5, D6 and D7, and capacitors C3 and C4. One end of the differential-mode inductance L2 is connected with the rectifier circuit, and the other end of the differential-mode inductance L2 is connected with the anode of the diode D6. The cathode of the diode D6 is connected with the anode of the diode D7, the cathode of the diode D5 and one end of the capacitor C4. The cathode of the diode D7 is connected with one end of the capacitor C3 and the startup circuit. The other end of the capacitor C3 and one end of the capacitor C4 are connected with the resonant circuit. The anode of the diode D5 is further connected with the rectifier circuit. The ballast circuit of the invention has the advantages of simple structure, high reliability and low production cost.
Description
Technical field
The application relates to lighting technical field, is specifically a kind of ballast circuit.
Background technology
Fluorescent lamp is a kind of very universal lighting, and it is because luminous efficiency is higher, light is soft and be subject to liking of the numerous common people.And ballast circuit is as the drive circuit of fluorescent lamp, therefore its importance is large in the extreme.
The ballast circuit of prior art comprises filter circuit, rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit; Described filter circuit is connected with rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit successively; Described circuit of power factor correction is also connected with resonant circuit.Described circuit of power factor correction is then primarily of the composition such as switching circuit, discharge circuit.There is following defect in the ballast circuit of said structure: because circuit of power factor correction is made up of switching circuit, discharge circuit etc. in the use procedure of reality, therefore not only make ballast circuit complex structure and poor reliability, and make the production cost of ballast circuit higher.
Summary of the invention
The technical problem that the application will solve is, provides that a kind of structure is simple, good reliability and the low ballast circuit of production cost.
The technical scheme of the application is, provides a kind of ballast circuit, comprises filter circuit, rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit; Described filter circuit is connected with rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit successively; Described circuit of power factor correction is also connected with resonant circuit; Described circuit of power factor correction comprises differential mode inductance L2, diode D5, D6, D7 and electric capacity C3, C4; One end of described differential mode inductance L2 is connected with rectification circuit, and the other end of described differential mode inductance L2 is connected with the anode of diode D6; The negative electrode of described diode D6 is connected with the negative electrode of the anode of diode D7, diode D5, one end of electric capacity C4; The negative electrode of described diode D7 is connected with one end of electric capacity C3, start-up circuit; The other end of described electric capacity C3, one end of electric capacity C4 are connected with resonant circuit;
The anode of described diode D5 is also connected with rectification circuit.
Described circuit of power factor correction also comprises an electric capacity C5, and the positive pole of described electric capacity C5 is connected with the negative electrode of diode D7, and the negative pole of described electric capacity C5 is connected with the anode of diode D5.
Described filter circuit is compound filter circuit.
Described compound filter circuit comprises electric capacity C1, C2 and differential mode inductance L1; One end of described electric capacity C1 is connected with one end of electric capacity C2, rectification circuit, and the other end of described electric capacity C1 is connected with one end of differential mode inductance L1, and the other end of described differential mode inductance L1 is connected with the other end of electric capacity C2, rectification circuit.
Described ballast circuit also comprises a protective circuit, and described protective circuit is connected with start-up circuit, resonant circuit.
Described protective circuit comprises thyristor Q3, electric capacity C9, C10, C11, resistance R14, R15, R16, R17, diode D9 and trigger tube DB4; The anode of described thyristor Q3 is connected with start-up circuit, and the negative electrode of described thyristor Q3 is connected with one end of resonant circuit, electric capacity C11, the negative pole of electric capacity C10, and the gate pole of described thyristor Q3 is connected with one end of the other end of electric capacity C11, resistance R14; One end of the other end of described resistance R14 and the positive pole of electric capacity C10, resistance R15, the positive pole of electric capacity C9, the negative electrode of diode D9 are connected; The anode of described diode D9 is connected with one end of resistance R16; The other end of described resistance R16 is connected with resonant circuit; The other end of described resistance R15 is connected with the negative pole of electric capacity C9, one end of resistance R17, resonant circuit; One end of described trigger tube DB4 is connected with resonant circuit, and the other end of described trigger tube DB4 is connected with the other end of resistance R17.
After adopting above structure, the application compared with prior art, has the following advantages:
The circuit of power factor correction of the application's ballast circuit comprises differential mode inductance L2, diode D5, D6, D7 and electric capacity C3, C4, its circuit structure is simple and device cost is lower, therefore not only make the simple and reliable property of ballast circuit structure good, and make the production cost of ballast circuit lower.
As improvement, described circuit of power factor correction also comprises an electric capacity C5, and the positive pole of described electric capacity C5 is connected with the negative electrode of diode D7, and the negative pole of described electric capacity C5 is connected with the anode of diode D5.Electric capacity C5 can correcting power factors further, thus is to a certain degree improving the functional reliability of the application's ballast circuit.
As improvement, described filter circuit is compound filter circuit.This circuit structure is simple and filtering performance is good, has also fallen production cost to a certain extent in addition.
As improvement, described ballast circuit also comprises a protective circuit, and described protective circuit is connected with start-up circuit, resonant circuit.Can be played a protective role to the application's ballast circuit by this circuit, thus to a certain degree improve the functional reliability of the application's ballast circuit.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the application's ballast circuit.
Fig. 2 is the circuit theory diagrams of the application's ballast circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the application is described further.
As shown in Figure 1 and Figure 2, a kind of ballast circuit of the application, comprise filter circuit, rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit, wherein filter circuit is as shown in the square frame 1 in Fig. 1, rectification circuit filter circuit is as shown in the square frame 2 in Fig. 1, and circuit of power factor correction is as shown in the square frame 3 in Fig. 1, and start-up circuit is as shown in the square frame 4 in Fig. 1, resonant circuit is as shown in the square frame 5 in Fig. 1, and protective circuit is as shown in the square frame 6 in Fig. 1; Described filter circuit is connected with rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit successively; Described circuit of power factor correction is also connected with resonant circuit; Rectification circuit i.e. a rectifier bridge VD1; Described circuit of power factor correction comprises differential mode inductance L2, diode D5, D6, D7 and electric capacity C3, C4; One end of described differential mode inductance L2 is connected with rectification circuit, and namely described one end of differential mode inductance L2 is connected with 2 pin of rectifier bridge VD1; The other end of described differential mode inductance L2 is connected with the anode of diode D6; The negative electrode of described diode D6 is connected with the negative electrode of the anode of diode D7, diode D5, one end of electric capacity C4; The negative electrode of described diode D7 is connected with one end of resistance R1 in one end of electric capacity C3, start-up circuit; The other end of described electric capacity C3, one end of electric capacity C4 are connected with resonant circuit; The anode of described diode D5 is also connected with rectification circuit, and namely the anode of diode D5 is also connected with 4 pin of rectifier bridge VD1.
Described circuit of power factor correction also comprises an electric capacity C5, and the positive pole of described electric capacity C5 is connected with the negative electrode of diode D7, and the negative pole of described electric capacity C5 is connected with the anode of diode D5.
Described filter circuit is compound filter circuit.
Described compound filter circuit comprises electric capacity C1, C2 and differential mode inductance L1; One end of described electric capacity C1 is connected with 3 pin of the rectifier bridge VD1 of one end of electric capacity C2, rectification circuit, the other end of described electric capacity C1 is connected with one end of differential mode inductance L1, and the other end of described differential mode inductance L1 is connected with 1 pin of the rectifier bridge VD1 of the other end of electric capacity C2, rectification circuit.
Described ballast circuit also comprises a protective circuit, and described protective circuit is connected with start-up circuit, resonant circuit.
Described protective circuit comprises thyristor Q3, electric capacity C9, C10, C11, resistance R14, R15, R16, R17, diode D9 and trigger tube DB4; The anode of described thyristor Q3 is connected with one end of the resistance R3 of start-up circuit, the negative electrode of described thyristor Q3 is connected with one end of resonant circuit, electric capacity C11, the negative pole of electric capacity C10, and the gate pole of described thyristor Q3 is connected with one end of the other end of electric capacity C11, resistance R14; One end of the other end of described resistance R14 and the positive pole of electric capacity C10, resistance R15, the positive pole of electric capacity C9, the negative electrode of diode D9 are connected; The anode of described diode D9 is connected with one end of resistance R16; The other end of described resistance R16 is connected with an input pin of one end of the common mode inductance L3 of resonant circuit; The other end of described resistance R15 is connected with another input pin of one end of one end of the negative pole of electric capacity C9, resistance R17, the common mode inductance L3 of resonant circuit; One end of described trigger tube DB4 is connected with one end of the resistance R10 of resonant circuit, and the other end of described trigger tube DB4 is connected with the other end of resistance R17.
Claims (5)
1. a ballast circuit, comprises filter circuit, rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit; Described filter circuit is connected with rectification circuit, circuit of power factor correction, start-up circuit and resonant circuit successively; Described circuit of power factor correction is also connected with resonant circuit; It is characterized in that: described circuit of power factor correction comprises differential mode inductance L2, diode D5, D6, D7 and electric capacity C3, C4; One end of described differential mode inductance L2 is connected with rectification circuit, and the other end of described differential mode inductance L2 is connected with the anode of diode D6; The negative electrode of described diode D6 is connected with the negative electrode of the anode of diode D7, diode D5, one end of electric capacity C4; The negative electrode of described diode D7 is connected with one end of electric capacity C3, start-up circuit; The other end of described electric capacity C3, one end of electric capacity C4 are connected with resonant circuit; The anode of described diode D5 is also connected with rectification circuit.
2. ballast circuit according to claim 1, is characterized in that: described circuit of power factor correction also comprises an electric capacity C5, and the positive pole of described electric capacity C5 is connected with the negative electrode of diode D7, and the negative pole of described electric capacity C5 is connected with the anode of diode D5.
3. ballast circuit according to claim 1, is characterized in that: described filter circuit is compound filter circuit.
4. ballast circuit according to claim 3, is characterized in that: described compound filter circuit comprises electric capacity C1, C2 and differential mode inductance L1; One end of described electric capacity C1 is connected with one end of electric capacity C2, rectification circuit, and the other end of described electric capacity C1 is connected with one end of differential mode inductance L1, and the other end of described differential mode inductance L1 is connected with the other end of electric capacity C2, rectification circuit.
5. ballast circuit according to claim 1, is characterized in that: described ballast circuit also comprises a protective circuit, and described protective circuit is connected with start-up circuit, resonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292550.XA CN104883802A (en) | 2015-05-26 | 2015-05-26 | Ballast circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292550.XA CN104883802A (en) | 2015-05-26 | 2015-05-26 | Ballast circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104883802A true CN104883802A (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292550.XA Pending CN104883802A (en) | 2015-05-26 | 2015-05-26 | Ballast circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104883802A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192896A (en) * | 1992-04-10 | 1993-03-09 | Kong Qin | Variable chopped input dimmable electronic ballast |
| US6072283A (en) * | 1997-02-21 | 2000-06-06 | Transformateurs Transfab Inc. | Micro-controller-operated high intensity discharge lamp ballast system and method |
| CN203748090U (en) * | 2014-03-25 | 2014-07-30 | 宁波威麟马电子有限公司 | Ballast circuit |
-
2015
- 2015-05-26 CN CN201510292550.XA patent/CN104883802A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192896A (en) * | 1992-04-10 | 1993-03-09 | Kong Qin | Variable chopped input dimmable electronic ballast |
| US6072283A (en) * | 1997-02-21 | 2000-06-06 | Transformateurs Transfab Inc. | Micro-controller-operated high intensity discharge lamp ballast system and method |
| CN203748090U (en) * | 2014-03-25 | 2014-07-30 | 宁波威麟马电子有限公司 | Ballast circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |
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| WD01 | Invention patent application deemed withdrawn after publication |