CN2514619Y - Electronic ballast for fluorescent lamp - Google Patents
Electronic ballast for fluorescent lamp Download PDFInfo
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- CN2514619Y CN2514619Y CN 01254927 CN01254927U CN2514619Y CN 2514619 Y CN2514619 Y CN 2514619Y CN 01254927 CN01254927 CN 01254927 CN 01254927 U CN01254927 U CN 01254927U CN 2514619 Y CN2514619 Y CN 2514619Y
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Abstract
The utility model relates to an electric amperite of a fluorescent lamp, comprising a rectification circuit, an oscillator, a loading inductance and a pair of loading ends, wherein the rectification circuit supplies direct-current power to the oscillator; the output of the oscillator is connected with one end of the loading inductance, and the other end of the loading inductance is connected with one end of a pair of loading ends; the rectification circuit is a voltage-multiplying rectification circuit which is composed of the parallel connection of a series capacitance branch and a series diode branch whose anode and cathode are connected; the two ends connected in parallel are separately connected with two direct-current power supplying ends of the oscillator; two midpoints of the two series branches are separately coupled with two alternating-current power supplying ends; the electric amperite also comprises a high-frequency reactive circuit; and the high-frequency reactive circuit comprises a direct-current blocking reactive impedance circuit which is connected between the other end of a pair of loading ends and any midpoint in two midpoints of the two series branches.
Description
Technical field
The utility model relates to the electric ballast that uses in the fluorescent lamp, relates in particular to the electronic ballast for fluoresent lamp of a kind of High Power Factor, High Voltage Power Supply.
Background technology
At present, the electric type fluorescent lamp ballast is used widely.The utility model is the solution that shortcoming proposed that exists at some fluorescent lamp ballasts.The electronic ballast for fluoresent lamp that disclosed of U.S. Pat P No.54344805 and No.5448137 for example, it adopts bridge rectifier, therefore can not adapt to some elongate fluorescent lamp pipe to the demanding situation of operating voltage.
The utility model is in order to address the above problem, and its purpose is to provide a kind of electronic ballast for fluoresent lamp that can allow load (fluorescent lamp) obtain high working voltage, High Power Factor.
Another purpose of the present utility model is to provide a kind of high working voltage output, High Power Factor and the simple electronic ballast for fluoresent lamp of line construction.
Summary of the invention
To achieve these goals, electronic ballast for fluoresent lamp of the present utility model comprises rectification circuit, oscillator, load inductance and a pair of load end, described rectification circuit carries out direct current supply to described oscillator, the output of described oscillator connects an end of described load inductance, end in the described a pair of load end of another termination of load inductance, it is characterized in that, described rectification circuit is a voltage doubling rectifing circuit, the series diode branch road parallel connection that is linked to each other by a series connection capacitive branch and a both positive and negative polarity constitutes, these two ends that are connected in parallel are connected respectively to two dc power supply terminals of described oscillator, and two mid points of described two series arms are coupled to two Alternating Current Power Supply ends respectively; Described electric ballast also comprises high-frequency feedback circuit, and described high-frequency feedback circuit comprises the stopping direct current feedback impedance circuit between arbitrary mid point in two mid points of the other end that is connected in the described a pair of load end and described two series arms.
This stopping direct current feedback impedance circuit can be an electric capacity.
According to the electronic ballast for fluoresent lamp of above formation, owing to adopt the voltage multiplying rectifier power supply, therefore compared with the prior art, the operating voltage of load end can improve nearly one times.Owing to adopt the high-frequency current feedback, improved power factor, thereby saved the electric energy of power supply network in addition.And this circuit has advantage of simple structure.
Described high-frequency feedback circuit also is included in the electric capacity that inserts respectively between described two dc power supply terminals of the other end in the described a pair of load end and described oscillator.
Can regulate the feedback quantity of high-frequency current by inserting such electric capacity, thereby can make power factor reach optimum value.
Oscillator of the present utility model can be the symmetrical expression mutual inductance oscillator that two triodes constitute, wherein, the collector electrode of 1 triode and the emitter of other 1 triode are connected and connect by instrument transformer as the output of oscillator an end of described load inductance, another collector electrode is connected with described two parallel connected end of described voltage doubling rectifing circuit respectively with two dc power supply terminals of another emitter as described vibration in described two triodes, and described 2 triodes base stage separately links to each other by the winding separately that is wound on the described instrument transformer with emitter.Adopt such oscillator, circuit is further simplified, stable, reliable.
Description of drawings
Fig. 1 is the structure principle chart of the utility model electronic ballast for fluoresent lamp one embodiment.
Fig. 2 is the concrete example of the utility model electronic ballast for fluoresent lamp medium-high frequency feedback circuit structure.
Embodiment
Referring to Fig. 1, electronic ballast for fluoresent lamp of the present utility model comprises voltage doubling rectifing circuit 1, oscillator 3, load inductance L1, a pair of load end a, b and high-frequency feedback circuit 2,1 pair of oscillator of voltage doubling rectifing circuit 3 carries out direct current supply, the output OUT of oscillator 3 connects the end of load inductance L1, the a pair of load end a of another termination of load inductance L1, the end among the b (as the end of a among Fig. 1).
Voltage doubling rectifing circuit 1 is by a series connection capacitive branch C1, a C2 and a both positive and negative polarity link to each other (as shown in Figure 1, promptly the positive pole of 1 diode (anode) links to each other with other negative pole (negative electrode) of 1 diode) series diode D1, the D2 branch road is in parallel to be constituted, these two ends that are connected in parallel are connected respectively to two dc power supply terminal P of oscillator 3, Q, two mid point M of two series arms, N are coupled to two Alternating Current Power Supply ends (be coupled in the present embodiment civil power 220V～) respectively.Wherein, correspond respectively to diode D1, the series and parallel of a plurality of diodes of D2 still is equivalent to diode D1 separately, D2; Correspond respectively to capacitor C 1, the series and parallel of a plurality of electric capacity of C2 still is equivalent to capacitor C 1 separately, C2.
Electric ballast also comprises high-frequency feedback circuit 2, in the present embodiment, high-frequency feedback circuit 2 comprises and is connected on a pair of load end a, two mid point M of the other end among the b (as the end of the b among Fig. 1) and two series arms, the feedback capacity C5 between arbitrary mid point among the N (as the mid point N among Fig. 1).
High-frequency feedback circuit 2 also can further be included in two dc power supply terminal P of the other end in a pair of load end (as the end of the b among Fig. 1) and oscillator 3, the capacitor C 3 that inserts respectively between the Q, C4.Capacitor C 3, C4 also constitutes the path of the high-frequency signal of oscillator 3.
Feedback capacity C5 in the feedback circuit 2 is used for carrying out high frequency feedback, and capacitor C 3, C4 is used for setting feedback factor, by changing the ratio of capacitor C 5 and capacitor C 3 (or capacitor C 4), just can change the size of feedback factor, thus the power factor of electric ballast can be adjusted to more suitable.
As shown in Figure 2, the feedback capacity C5 in the high-frequency feedback circuit 2 can substitute with the impedance circuit of stopping direct current, and for example, shown in (a), the impedance circuit of this stopping direct current is connected with inductance L 5 by capacitor C 51 and constituted among Fig. 2; Shown in Fig. 2 (b), the inductance L 5 in this impedance circuit can substitute with inductance L 5 parallel resistance R; Shown in Fig. 2 (c), the inductance L 5 in this impedance circuit can substitute with inductance L 5 series resistance R; Shown in Fig. 2 (d), the inductance L 5 in this impedance circuit can substitute with inductance shunt capacitance C52, or the like, no longer exemplify at this.Therefore, stopping direct current feedback impedance circuit described here comprises pure electric capacity, and the various combinations of electric capacity and inductance or electric capacity, inductance and resistance.This stopping direct current impedance feedback circuit has the advantages that to change feedback phase, by changing between capacitive reactance in the impedance feedback circuit, induction reactance, resistance three or appointing the two ratio, just can change the phase place size of feedback, in conjunction with the adjustment of above-mentioned capacitor C 3 and C4, power factor can be adjusted to the best again.
Get back to Fig. 1, the oscillator 3 of present embodiment can be two triode T1, the symmetrical expression mutual inductance oscillator 3 that T2 constitutes, wherein, the collector electrode of 1 triode T2 is connected and connects by instrument transformer L2 as the output OUT of oscillator 3 end of load inductance L1 with the emitter of other 1 triode T1, two triode T1, another collector electrode and another emitter are as two dc power supply terminal P of vibration among the T2, Q is connected with two parallel connected end of voltage doubling rectifing circuit 1 respectively, 2 triode T1, T2 base stage separately links to each other by the winding separately that is wound on the instrument transformer L2 with emitter.
In addition, this oscillator also can adopt self-induction type symmetric oscillations device, oscillator and various asymmetric oscillator that various assemblies constitute.When adopting the asymmetric oscillator, feedback circuit must insert the non-of input AC circuit and hold altogether, and capacitor C 3, and C4 only uses one of them.
Below in conjunction with the embodiments the utility model is had been described in detail, those skilled in the art can carry out variation and the modification of all embodiment to the utility model according to top description, therefore, some particular circuit configurations details not should be understood to qualification of the present utility model.The utility model is contained embodiment of the present utility model with appended claims.
Claims (4)
1. electronic ballast for fluoresent lamp, comprise rectification circuit, oscillator, load inductance and a pair of load end, described rectification circuit carries out direct current supply to described oscillator, the output of described oscillator connects an end of described load inductance, end in the described a pair of load end of another termination of load inductance, it is characterized in that
Described rectification circuit is a voltage doubling rectifing circuit, the series diode branch road parallel connection that is linked to each other by a series connection capacitive branch and a both positive and negative polarity constitutes, these two ends that are connected in parallel are connected respectively to two dc power supply terminals of described oscillator, and two mid points of described two series arms are coupled to two Alternating Current Power Supply ends respectively;
Described electric ballast also comprises high-frequency feedback circuit, and described high-frequency feedback circuit comprises the stopping direct current feedback impedance circuit between arbitrary mid point in two mid points of the other end that is connected in the described a pair of load end and described two series arms.
2. electronic ballast for fluoresent lamp as claimed in claim 1 is characterized in that, described stopping direct current feedback impedance circuit is an electric capacity.
3. electronic ballast for fluoresent lamp as claimed in claim 1 or 2 is characterized in that, described high-frequency feedback circuit also is included in the electric capacity that inserts respectively between described two dc power supply terminals of the other end in the described a pair of load end and described oscillator.
4. electronic ballast for fluoresent lamp as claimed in claim 3, it is characterized in that, described oscillator is the symmetrical expression mutual inductance oscillator that is made of two triodes, wherein, the collector electrode of 1 triode and the emitter of other 1 triode are connected and connect by instrument transformer as the output of oscillator an end of described load inductance, another collector electrode is connected with described two parallel connected end of described voltage doubling rectifing circuit respectively with two dc power supply terminals of another emitter as described vibration in described two triodes, and described 2 triodes base stage separately links to each other by the winding separately that is wound on the described instrument transformer with emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254927 CN2514619Y (en) | 2001-11-28 | 2001-11-28 | Electronic ballast for fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254927 CN2514619Y (en) | 2001-11-28 | 2001-11-28 | Electronic ballast for fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2514619Y true CN2514619Y (en) | 2002-10-02 |
Family
ID=33664158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01254927 Expired - Lifetime CN2514619Y (en) | 2001-11-28 | 2001-11-28 | Electronic ballast for fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2514619Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138605A (en) * | 2011-11-28 | 2013-06-05 | 何曙光 | Alternating current (AC) / direct current (DC) switching circuit of high frequency and low frequency |
| CN104124879A (en) * | 2014-07-01 | 2014-10-29 | 南京航空航天大学 | Vibration energy recovery interface circuit and control method thereof |
| CN104319993A (en) * | 2014-10-31 | 2015-01-28 | 周云侠 | Small-power direct-current-to-direct-current-voltage-multiplying device |
-
2001
- 2001-11-28 CN CN 01254927 patent/CN2514619Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138605A (en) * | 2011-11-28 | 2013-06-05 | 何曙光 | Alternating current (AC) / direct current (DC) switching circuit of high frequency and low frequency |
| CN104124879A (en) * | 2014-07-01 | 2014-10-29 | 南京航空航天大学 | Vibration energy recovery interface circuit and control method thereof |
| CN104124879B (en) * | 2014-07-01 | 2017-02-15 | 南京航空航天大学 | Vibration energy recovery interface circuit and control method thereof |
| CN104319993A (en) * | 2014-10-31 | 2015-01-28 | 周云侠 | Small-power direct-current-to-direct-current-voltage-multiplying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111128 Granted publication date: 20021002 |