CN2692958Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
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- CN2692958Y CN2692958Y CN 200420019764 CN200420019764U CN2692958Y CN 2692958 Y CN2692958 Y CN 2692958Y CN 200420019764 CN200420019764 CN 200420019764 CN 200420019764 U CN200420019764 U CN 200420019764U CN 2692958 Y CN2692958 Y CN 2692958Y
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Abstract
The utility model relates to an electronic ballast. The utility model is characterized in that a first stage filter circuit on a circuit board is connected with a rectification circuit, and the rectification circuit is connected with a second stage filter power factor compensation and power supply filter circuit. The second stage filter power factor compensation and power supply filter circuit is connected with a sine oscillation circuit, and the sine oscillation circuit is connected with a control driving circuit. The electronic ballast uses discrete elements with low cost to form a power factor compensation circuit with high performance. The line is used, a power factor can be improved to the same effect of an active filter line adopting an integrated circuit, can attain the L stage low aberration standard of the country environment marking product technical requirement. A load (such as electricity discharge tubes, energy-saving lamp tubes with all types, and fluorescent lamp tubes) current wave crest ratio is below 1.7. The active filter circuit which is adopted at present and has high cost and complicated line can be completely substituted. The utility model has better practicability and easy popularization.
Description
Technical field:
The utility model relates to the technical field of electrical accessorie, specifically a kind of electric ballast.
Background technology:
Along with the progress of development of human society and society, particularly the needs of electric energy are increasing to the energy for people, and energy scarcity perplexs a great problem of human civilization progress always.People are constantly being developed the new energy on the one hand, and the more economical more direct way of another one is exactly a large amount of energy-conserving products that adopt.Illuminating product is the closest with our relation always, and the scope of application is product the most widely.We need widely popularize the green illumination product for energy savings, and electronic energy-saving lamp and electric ballast are topmost two parts in the green illumination product.
But electronic energy-saving lamp of Xiao Shouing and electric ballast product are low power factor (Cos Φ is generally about 0.5～0.6) mostly in the market, and be bigger to the loss of circuit, and the load capacity of circuit is reduced greatly.Address this problem, mainly by following two approach: the 1) active filter circuit of employing integrated circuit, the power factor of circuit can reach more than 0.98, and the current wave crest ratio of load (fluorescent tube) can be less than 1.7.Shortcoming is that cost is higher, complex circuit, and volume is big, needs integrated package, field effect transistor, transformer, and complicated circuit; 2) adopt passive filter circuit, utilize the discrete components and parts to constitute simple power factor compensation circuit, improve the power factor of circuit, main feature is that cost is low, circuit simple, takies characteristics such as volume is little.Shortcoming is the effect (Cos Φ＞0.98) that present passive filtering line power factor is difficult to bring up to active power filtering, can not satisfy national L grade standard.The lamp tube current crest of most of passive filtering circuit is Bi More height, and generally all greater than 1.7, fluorescent tube turns black easily, and light decay is bigger, and lamp tube service life is shortened.
Summary of the invention:
The purpose of this utility model is to provide a kind of electric ballast, and it can overcome some shortcomings of the prior art.
To achieve these goals, the technical solution of the utility model is: a kind of electric ballast, it mainly comprises shell, circuit board in the enclosure is set, it is characterized in that: the one-level filter circuit on the described circuit board is connected with rectification circuit, rectification circuit is connected with compensation of secondary filtered power factor and electric source filter circuit, and factor compensation of secondary filtered power and electric source filter circuit are connected with sinusoidal oscillation circuit, and sinusoidal oscillation circuit is connected with control Driver Circuit.
The utility model is to utilize lower-cost discrete component to form a high performance power factor compensation circuit, use this circuit that power factor is brought up to and the identical effect of active power filtering circuit that adopts integrated circuit, reach the low distortion standard of L level of National Environmental famous special product specification requirement, and load (discharge tube for example, all types of power saving fluorescent lampss and fluorescent tube) current wave crest ratio＜1.7, can replace currently used expensive comprehensively, the active filter circuit of complex circuit, better practicability is arranged, be easy to promote.
Description of drawings:
Fig. 1 is the utility model electrical block diagram
Fig. 2 is the utility model one embodiment circuit theory diagrams
Embodiment:
The utility model will be further described below in conjunction with drawings and Examples.
The utility model mainly comprises shell, circuit board in the enclosure is set, it is characterized in that: the one-level filter circuit 1 on the described circuit board is connected with rectification circuit 2, rectification circuit is connected with compensation of secondary filtered power factor and electric source filter circuit 3, factor compensation of secondary filtered power and electric source filter circuit are connected with sinusoidal oscillation circuit 4, sinusoidal oscillation circuit is connected with control Driver Circuit 5, the positive pole of its diode D5 in compensation of secondary filtered power factor and electric source filter circuit is connected with the output of inductance L 2, the negative pole of diode D7 is connected with an end of capacitor C 5 and the positive pole of diode D6 respectively, the negative pole of diode D6 is connected with rectification circuit, the other end of capacitor C 5 is connected with load, the positive pole of diode D7 respectively with the positive pole of diode D5, one end of the negative pole of diode D6 and capacitor C 5 is connected, the positive pole of diode D7 is connected with an end of capacitor C 7, the other end of capacitor C 7 is connected with an end of capacitor C 6, the other end of capacitor C 6 is connected with the other end of load with capacitor C 5 respectively, the two ends of resistance R 2 are parallel to the two ends of capacitor C 5, and inductance L 2 two ends are parallel with resistance R 1.Capacitor C 5 is a high-frequency coupling electric capacity, the withstand voltage of capacitor C 3 is 250V～1000V, capacitance is 0.022～1 μ F, the withstand voltage of capacitor C 5 and capacitor C 6 is 200V～1500V, capacitance is 0.022～1 μ F, the resistance of resistance R 1, R2 is 5K～1M Ω, and the inductance value of inductance L 2 is 0.5mH～10mH.
In concrete enforcement, adopt one-level LC filter circuit to be connected with bridge rectifier, bridge rectifier connects compensation of secondary filtered power factor and electric source filter circuit, factor compensation of secondary filtered power and electric source filter circuit are connected with sinusoidal oscillation circuit, sinusoidal oscillation circuit is connected with control Driver Circuit, wherein secondary filtered power factor compensation and electric source filter circuit are made up of the anti-high-frequency interferencing circuit of secondary and power factor compensation and electric source filter circuit, as shown in Figure 2,120V/60Hz or 220V/50Hz alternating current are through fuse, through C1, the bridge rectifier that the LC filter that C2 and inductance L 1 are formed and diode D1～D4 form carries out full-wave rectification, voltage after the rectification passes through by inductance L 2, resistance R 2, the anti-high-frequency interferencing circuit that capacitor C 3 is formed with by diode D5, D6, D7, capacitor C 4, C5, the power factor compensation circuit that resistance R 2 is formed, carrying out power filter by electrochemical capacitor C6, put on by Q1 through filtered direct voltage, the series resonant circuit that elements such as Q2 are formed makes circuit produce 20KHz～60KHz high-frequency alternating current and goes to light load.
The power factor compensation circuit of this electric ballast is by diode D5, D6, D7, capacitor C 4, C5 constitutes the passive power factor compensating circuit, the power factor of circuit is increased to more than 0.99, the total harmonic distortion of electric current is less than 12%, and the proof load current wave crest ratio less than 1.6 its groundworks as shown in Figure 2, with the anomaly semi-bridge type inverter as feedback point, allow high flat pulse electric current (voltage is higher than the VA part) from circuit output end through the C5 high-frequency coupling to the A point, superimposed with the high-frequency rectification electric current, through diode D7 electrolytic capacitor filter is charged, at this moment, D5, the unidirectional conducting effect of D7 has guaranteed that the high-frequency impulse feedback current can not flow to input, and only when C7 voltage is low, work the electric current low ebb effect that high-frequency rectification forms of filling up, thereby make load current can chase the sine wave of input voltage, make the entire circuit power factor value very high, the current wave crest ratio that has guaranteed load again is below 1.7, wherein the withstand voltage of capacitor C 3 is the electric capacity of 250V～1000V, its capacity is between 0.022～1 μ F, capacitor C 5, capacitor C 6 is withstand voltage electric capacity, and its withstand voltage is between 250V～1500V.
Adopted anti-high-frequency circuit of secondary LC and power factor compensation and electric source filter circuit that a lot of benefits are arranged in the electronic ballast circuit, first, can avoid pollution to power supply, greatly reduce interference to electric power network, particularly great-power electronic ballast and electricity-saving lamp, in the past because its electric current is big, the power height, generally all more than 30KHz, its high-frequency signal is very big to the interference of power supply, often has influence on the use of other electrical equipment in the same circuit for operating frequency, and this circuit has adopted the secondary filtering system, greatly reduce the interference of circuit itself, and reached the requirement of country, meet up-to-date CCC Valuation Standard the anti-EMI of illumination series products to big vast electrical network.Second, because of having adopted unique power factor compensation circuit, the power factor of circuit is brought up to higher level, select suitable parameter matching power factor can be increased to 0.99 above THD＜12%, each harmonic component all meets the L level distortion standard of National Environmental famous special product specification requirement, reach and adopt the same effect of active power filtering, overcome the drawback that passive filtering system effect in the past adopts the active filter system difference.The 3rd, overcome adopt power factor compensation circuit in the past after, the shortcoming that the crest of discharge tube is bigger, circuit crest ratio of the present utility model can be controlled in below 1.7, generally between 1.5～1.65, has stopped the fluorescent tube root and has turned black in early days, light decay is big, the shortcoming that the discharge tube life-span is short.The 4th, because after adopting this circuit, power factor is greatly improved, greatly reduce required input current, reduced the no power waste of power circuit, greatly reduce the heating of power circuit, improve the prestowage ability of circuit, really realized the green illumination environmental protection requirement.
This product resistance of used resistance in force is 5K～1M Ω, and two utmost point Qie D5, D6, D7 are 1N4900, FR100 or HER100 series diode.
Claims (5)
1, a kind of electric ballast, it mainly comprises shell, circuit board in the enclosure is set, it is characterized in that: the one-level filter circuit on the described circuit board is connected with rectification circuit, rectification circuit is connected with compensation of secondary filtered power factor and electric source filter circuit, factor compensation of secondary filtered power and electric source filter circuit are connected with sinusoidal oscillation circuit, and sinusoidal oscillation circuit is connected with control Driver Circuit.
2, by the described a kind of electric ballast of claim 1, it is characterized in that: the positive pole of diode (D5) is connected with the output of inductance (L2) in compensation of secondary filtered power factor and electric source filter circuit, the negative pole of diode (D7) is connected with an end of electric capacity (C5) and the positive pole of diode (D6) respectively, the negative pole of diode (D6) is connected with rectification circuit, the other end of electric capacity (C5) is connected with load, the positive pole of diode (D7) respectively with the positive pole of diode (D5), the negative pole of diode (D6) is connected with an end of electric capacity (C5), the positive pole of diode (D7) is connected with an end of electric capacity (C7), the other end of electric capacity (C7) is connected with an end of electric capacity (C6), the other end of electric capacity (C6) is connected with the other end of load with electric capacity (C5) respectively, and the two ends of resistance (R2) are parallel to the two ends of electric capacity (C5).
3, by the described a kind of electric ballast of claim 2, it is characterized in that: inductance (L2) two ends are parallel with resistance (R1).
4, by the described a kind of electric ballast of claim 1, it is characterized in that: described capacitor C 5 is high-frequency coupling electric capacity.
5, by the described a kind of electric ballast of claim 1, it is characterized in that: the withstand voltage of the electric capacity (C3) in compensation of secondary filtered power factor and electric source filter circuit is 250V～1000V, capacitance is 0.022～1 μ F, the withstand voltage of electric capacity (C5) and electric capacity (C6) is 200V～1500V, capacitance is 0.022～1 μ F, the resistance of resistance (R1), (R2) is 5K～1M Ω, and the inductance value of inductance (L2) is 0.5mH～10mH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019764 CN2692958Y (en) | 2004-01-19 | 2004-01-19 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019764 CN2692958Y (en) | 2004-01-19 | 2004-01-19 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2692958Y true CN2692958Y (en) | 2005-04-13 |
Family
ID=34769634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019764 Expired - Fee Related CN2692958Y (en) | 2004-01-19 | 2004-01-19 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2692958Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769851A (en) * | 2012-09-17 | 2015-07-08 | 意法爱立信有限公司 | A method of and receiver for communication during wireless power transmission |
| CN111463768A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
| CN111463766A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
| CN111463767A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
-
2004
- 2004-01-19 CN CN 200420019764 patent/CN2692958Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769851A (en) * | 2012-09-17 | 2015-07-08 | 意法爱立信有限公司 | A method of and receiver for communication during wireless power transmission |
| CN111463768A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
| CN111463766A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
| CN111463767A (en) * | 2019-01-21 | 2020-07-28 | 广东美的制冷设备有限公司 | Power supply protection circuit board and air conditioner |
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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 |