CN201821562U - Low-voltage fluorescent lamp - Google Patents
Low-voltage fluorescent lamp Download PDFInfo
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- CN201821562U CN201821562U CN2010205240314U CN201020524031U CN201821562U CN 201821562 U CN201821562 U CN 201821562U CN 2010205240314 U CN2010205240314 U CN 2010205240314U CN 201020524031 U CN201020524031 U CN 201020524031U CN 201821562 U CN201821562 U CN 201821562U
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Abstract
The utility model provides a low-voltage fluorescent lamp, which comprises an electromagnetic interference preventive circuit, voltage-multiplying rectifier circuit, a filter circuit, a high-frequency generating circuit, a sine wave generating circuit and a load. The electromagnetic interference preventive circuit is used for being connected into alternating current input, the voltage-multiplying rectifier circuit rectifies alternating current into direct current and then realizes voltage multiplying, the high-frequency generating circuit converts the direct current into square wave alternating current, and the sine wave generating circuit converts the square wave alternating current into sine wave alternating current. The low-voltage fluorescent lamp obtains quadruple direct current voltage output via the voltage-multiplying rectifier circuit, so that work current of the high-frequency generating circuit is reduced into the quarter of original work current, load carrying ability of the circuits is strengthened, the load can be started more easily, and service lives of products are prolonged.
Description
Technical field
The utility model relates to the low-pressure lamp technology, relates in particular to a kind of low-voltage fluorescent lamp.
Background technology
The standard illuminants piezoelectric voltage is an alternating current 220V, according to the special engineering needs, may use and exchange 127V or direct current 36V, and perhaps other are lower than other light fixture of standard illuminants piezoelectric voltage level, are called low-pressure lamp.Under the low ac rated voltage input of the spy below the 50V, because the electric ballast of traditional low-voltage fluorescent lamp is to utilize the voltage that is added in the fluorescent lamp two ends directly to light fluorescent lamp, the negative electrode of this mode fluorescent tube does not have preheating, be difficult for starting, the life-span of product is very short, hundreds of hour just serious blackout, and the carrying load ability of circuit is relatively poor, the low voltage starting difficulty.
Summary of the invention
The purpose of this utility model is to provide a kind of low-voltage fluorescent lamp, improves the carrying load ability of low-voltage fluorescent lamp, problem such as solve low pressure, cold-starting is difficult to and useful life is short.
Technical solutions of the utility model are:
The utility model provides a kind of low-voltage fluorescent lamp, comprise: the anti-electromagnetic interference circuit that is used for the input of incoming transport electricity, with AC rectification is direct current and the voltage doubling rectifing circuit of carrying out multiplication of voltage, filter circuit, the high frequency generation circuit that direct current is transferred to the square wave alternating-current electricity, the square wave alternating-current electricity is transferred to the sine wave generating circuit and the load of sine wave alternating current, wherein, described voltage doubling rectifing circuit comprises first to fourth diode and first to fourth electric capacity, the anode of described second diode connects the live wire in the anti-electromagnetic interference circuit, negative electrode connects the anode of first diode, the anode of first diode is also taken over control zero line in the electromagnetic interference circuit by first electric capacity, the negative electrode of described the 3rd diode connects the anode of described second diode, anode is by the second electric capacity connecting to neutral line, the negative electrode of described the 4th diode connects the anode of the 3rd diode, anode connects the anode of second diode by the 4th electric capacity, described the 3rd electric capacity is connected between the anode of the negative electrode of first diode and second diode, and the anode of the negative electrode of described first diode and the 4th diode is respectively as the output cathode and the output negative pole output dc voltage of voltage doubling rectifing circuit.
Described low-voltage fluorescent lamp, wherein, described anti electromagnetic wave interfered circuit comprises protective tube and the LC filter of being made up of first inductance and electric capacity, and described protective tube is connected on the live wire of alternating current input, electric capacity is connected between live wire and the zero line, and first inductance is connected on the zero line.
Described low-voltage fluorescent lamp, wherein, described filter circuit comprises the output cathode that is connected in rectification circuit and the filter capacitor between the output negative pole.
Described low-voltage fluorescent lamp, wherein, described high frequency generation circuit comprises starting resistance, diac, magnetic ring transformer, integrating capacitor and first second electronic switch, described starting resistance one end is connected in the output cathode of voltage doubling rectifing circuit, the other end connects the output negative pole of described voltage doubling rectifing circuit by integrating capacitor, the input of described first electronic switch connects the output cathode of voltage doubling rectifing circuit, output connects the input of second electronic switch, first secondary coil of control end by magnetic ring transformer is connected between the input of the output of described first electronic switch and second electronic switch, the control end of described second electronic switch connects described integrating capacitor by diac and connects the output negative pole of described voltage doubling rectifing circuit by the second subprime coil of magnetic ring transformer, output connects the output negative pole of described voltage doubling rectifing circuit, and the primary coil of described magnetic ring transformer is connected between the output and sine wave generating circuit of first electronic switch.
Described low-voltage fluorescent lamp, wherein, described electronic switch is the NPN triode, the control end of described electronic switch, input and output be base stage, the collector and emitter of corresponding triode respectively.
Described low-voltage fluorescent lamp, wherein, described sine wave generating circuit comprises second inductance and the 5th and the 6th electric capacity, and described second inductance, one end is connected with the primary coil of magnetic ring transformer, the other end connects load, and the described the 5th and the 6th electric capacity is all in parallel with load.
Described low-voltage fluorescent lamp, wherein, the described the 5th and the 6th electric capacity is parallel to the both sides of load respectively.
Described low-voltage fluorescent lamp, wherein, described load comprises fluorescent lamp and thermistor, described thermistor is in parallel with fluorescent lamp.
The utility model provides a kind of low-voltage fluorescent lamp, the direct voltage that obtains four times by voltage doubling rectifing circuit is exported, make the operating current of high frequency generation circuit be reduced to original 1/4th, strengthened the carrying load ability of circuit, make the easier startup of load, and prolonged the useful life of product.
Description of drawings
Fig. 1 is the theory diagram of the utility model low-voltage fluorescent lamp better embodiment;
Fig. 2 is the circuit diagram of the utility model low-voltage fluorescent lamp better embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
With reference to figure 1, the low-voltage fluorescent lamp better embodiment that the utility model provides comprises: be used for incoming transport electricity input anti-electromagnetic interference circuit 11, AC rectification is direct current and the voltage doubling rectifing circuit 12 of carrying out multiplication of voltage, filter circuit 13, direct current is transferred to the high frequency generation circuit 14 of square wave alternating-current electricity, the square wave alternating-current electricity transferred to the sine wave generating circuit 15 and the load 16 of sine wave alternating current.
With reference to figure 2, circuit diagram for the utility model better embodiment, described anti-electromagnetic interference circuit 11 comprises protective tube FU and the LC filter of being made up of inductance L 1 and capacitor C 1, described protective tube FU is connected on the live wire L of alternating current input AC, capacitor C 1 is connected between live wire L and the zero line N, and inductance L 1 is connected on the zero line N.When abnormal current appearred in product, the safety effect that prevents that unusual accident from taking place was played in protective tube FU fusing, and the LC filter plays the two-way prevention effect of the interference effect electrical network that prevents that Disturbance in Power Net product and product from sending, and plays filtering and protective effect.
Described voltage doubling rectifing circuit 12 comprises capacitor C 3～C6 and diode D1～D4, be bridge rectifier, comprise diode D1～D4, the anode of the described diode D2 line L that starts to exchange fire, negative electrode connects the anode of diode D1, the anode of diode D1 is also by capacitor C 3 connecting to neutral line N, the negative electrode of described diode D3 connects the anode of described diode D2, anode is by capacitor C 4 connecting to neutral line N, the negative electrode of described diode D4 connects the anode of diode D3, anode connects the anode of diode D2 by capacitor C 6, described capacitor C 5 is connected between the anode of the negative electrode of diode D1 and diode D2, and the anode of the negative electrode of described diode D1 and diode D4 is respectively as the output cathode and the output negative pole output dc voltage of voltage doubling rectifing circuit 12.
The operation principle of described voltage doubling rectifing circuit 12 is as follows: an end that is connected with diode D2 in the voltage doubling rectifing circuit 12 in the output of anti-electromagnetic interference circuit 11 is timing, be charged to supply voltage for capacitor C 3 by diode D2, when anti-electromagnetic interference circuit 11 negative half periods, be charged to supply voltage for capacitor C 4 by diode D3 in the voltage doubling rectifing circuit 12, when positive half cycle is got back in anti-electromagnetic interference circuit 11 outputs, the voltage of capacitor C 4 adds that supply voltage (i.e. 2 times supply voltage) is charged to 2 times of supply voltages to capacitor C 6, when negative half period is got back in anti-electromagnetic interference circuit 11 outputs, the voltage of capacitor C 3 adds that supply voltage (i.e. 2 times of supply voltages) is charged to 2 times of supply voltages through diode D1 to capacitor C 5, so obtain 4 times of supply voltages outputs on capacitor C 5 and C6.
Described filter circuit 13 comprises output cathode and the capacitor C between the output negative pole 2 that is connected in voltage doubling rectifing circuit 12, and described capacitor C 2 has been improved the environment of high frequency generation circuit 14 work after eliminating interference, filtering, make its work more reliable.
Described high frequency generation circuit 14 comprises resistance R 1～R4, NPN triode Q1 and Q2 as electronic switch, diac DB3, magnetic ring transformer T1, capacitor C 7～C9 and diode D5～D7, described resistance R 1 one ends are connected in the output cathode of described voltage doubling rectifing circuit 12, the other end connects the output negative pole of voltage doubling rectifing circuit 12 by capacitor C 7, the anode of diode D5 is connected between described resistance R 1 and the capacitor C 7, negative electrode is connected the base stage of triode Q1 successively with resistance R 3 by the secondary coil T1-1 of magnetic ring transformer T1, the negative electrode of described diode D5 also is connected with the collector electrode of triode Q2, the collector electrode of triode Q1 connects the output cathode of described voltage doubling rectifing circuit 12, emitter connects the collector electrode of described triode Q2 and the anode of diode D6, the negative electrode of diode D6 connects the base stage of triode Q1, resistance R 2 and capacitor C 8 are parallel between the collector electrode and emitter of triode Q1, the base stage of described triode Q2 connects the anode of described diode D5 by diac DB3, the output negative pole that also is connected voltage doubling rectifing circuit 12 according to this by resistance R 4 with the secondary coil T1-2 of magnetic ring transformer T1, the emitter of triode Q2 connects the output negative pole of voltage doubling rectifing circuit 12 and the anode of diode D7, the negative electrode of diode D7 connects the collector electrode of triode Q2, the primary coil T1-0 of described magnetic ring transformer T1 is connected between the collector electrode and sine wave generating circuit 16 of triode Q2, and capacitor C 9 is connected between the emitter and sine wave generating circuit 16 of triode Q2.
The principle of described high frequency generation circuit 14 is as follows: when connecting the alternating current input, integrating capacitor C7 is by starting resistance R1 charging, the voltage of integrating capacitor C7 rises to the threshold value of diac DB3 when (being about 32V), integrating capacitor C7 is by diac DB3 discharge and be added to the base stage of triode Q2, owing to have dynatron effect after the diac DB3 conducting, can obtain on the base stage that bigger discharging current is added to triode Q2, pass through the amplification of triode Q2 again, make magnetic ring transformer T1, the input of triode Q2 and sine wave generating circuit 15 and load 16 and direct voltage constitutes the starting of oscillation of positive feedback oscillating circuit, and triode Q1 and Q2 take turns conducting and realized being changed to the output of high-frequency alternating current by direct current.
Described sine wave generating circuit 15 comprises inductance L 2 and capacitor C 10 and C11, and described inductance L 2 one ends are connected with the primary coil T1-0 of magnetic ring transformer T1, and the other end connects load 16, and capacitor C 10 and C11 are parallel to the both sides of load 16 respectively, as shown in Figure 2.
Described load 16 comprises fluorescent lamp and thermistor ptc in parallel.Described fluorescent lamp can be one end fluorescent lamp or double-end fluorescent, one end fluorescent lamp can be U-shaped, spirality, annular etc. as long as two negative electrodes are drawn from an end, double-end fluorescent can be that straight tube or its combination is as long as negative electrode is to draw from two ends, thermistor ptc can be with common thermistor or intelligent thermistor, thermistor ptc has the negative electrode of preheat fluorescent lamp, the effect that prolongs the useful life of fluorescent lamp.
In better embodiment of the present utility model, described voltage doubling rectifing circuit can obtain the direct voltage output about 200V under the ac rated voltage of 50V, make the operating current of the electronic switch in the high frequency generation circuit 14 be reduced to original 1/4th, make load 16 easier startups, entire product is operated in optimum state, also improve reliability of products and prolonged useful life of product, more than 8 times of conventional low fluorescent lifetime be can reach, low voltage starting difficulty, short problem of life-span successfully solved.
In better embodiment of the present utility model, adopt the NPN triode as electronic switch, as other execution mode, also can replace triode with N-channel MOS pipe or other electron component.
Should be understood that; the above only is a better embodiment of the present utility model; not in order to limit protection range of the present utility model; for those of ordinary skills; any modification of being done according to the above description, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. low-voltage fluorescent lamp, comprise: the anti-electromagnetic interference circuit that is used for the input of incoming transport electricity, with AC rectification is direct current and the voltage doubling rectifing circuit of carrying out multiplication of voltage, filter circuit, the high frequency generation circuit that direct current is transferred to the square wave alternating-current electricity, the square wave alternating-current electricity is transferred to the sine wave generating circuit and the load of sine wave alternating current, it is characterized in that, described voltage doubling rectifing circuit comprises first to fourth diode and first to fourth electric capacity, the anode of described second diode connects the live wire in the anti-electromagnetic interference circuit, negative electrode connects the anode of first diode, the anode of first diode is also taken over control zero line in the electromagnetic interference circuit by first electric capacity, the negative electrode of described the 3rd diode connects the anode of described second diode, anode is by the second electric capacity connecting to neutral line, the negative electrode of described the 4th diode connects the anode of the 3rd diode, anode connects the anode of second diode by the 4th electric capacity, described the 3rd electric capacity is connected between the anode of the negative electrode of first diode and second diode, and the anode of the negative electrode of described first diode and the 4th diode is respectively as the output cathode and the output negative pole output dc voltage of voltage doubling rectifing circuit.
2. low-voltage fluorescent lamp according to claim 1, it is characterized in that, described anti electromagnetic wave interfered circuit comprises protective tube and the LC filter of being made up of first inductance and electric capacity, described protective tube is connected on the live wire of alternating current input, electric capacity is connected between live wire and the zero line, and first inductance is connected on the zero line.
3. low-voltage fluorescent lamp according to claim 1 is characterized in that, described filter circuit comprises the output cathode that is connected in rectification circuit and the filter capacitor between the output negative pole.
4. low-voltage fluorescent lamp according to claim 1, it is characterized in that, described high frequency generation circuit comprises starting resistance, diac, magnetic ring transformer, integrating capacitor and first second electronic switch, described starting resistance one end is connected in the output cathode of voltage doubling rectifing circuit, the other end connects the output negative pole of described voltage doubling rectifing circuit by integrating capacitor, the input of described first electronic switch connects the output cathode of voltage doubling rectifing circuit, output connects the input of second electronic switch, first secondary coil of control end by magnetic ring transformer is connected between the input of the output of described first electronic switch and second electronic switch, the control end of described second electronic switch connects described integrating capacitor by diac and connects the output negative pole of described voltage doubling rectifing circuit by the second subprime coil of magnetic ring transformer, output connects the output negative pole of described voltage doubling rectifing circuit, and the primary coil of described magnetic ring transformer is connected between the output and sine wave generating circuit of first electronic switch.
5. low-voltage fluorescent lamp according to claim 4 is characterized in that, described electronic switch is the NPN triode, and the control end of described electronic switch, input and output be base stage, the collector and emitter of corresponding triode respectively.
6. low-voltage fluorescent lamp according to claim 4, it is characterized in that, described sine wave generating circuit comprises second inductance and the 5th and the 6th electric capacity, described second inductance, one end is connected with the primary coil of magnetic ring transformer, the other end connects load, and the described the 5th and the 6th electric capacity is all in parallel with load.
7. low-voltage fluorescent lamp according to claim 6 is characterized in that, the described the 5th and the 6th electric capacity is parallel to the both sides of load respectively.
8. according to the described low-voltage fluorescent lamp of arbitrary claim in the claim 1, it is characterized in that described load comprises fluorescent lamp and thermistor, described thermistor is in parallel with fluorescent lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205240314U CN201821562U (en) | 2010-09-08 | 2010-09-08 | Low-voltage fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205240314U CN201821562U (en) | 2010-09-08 | 2010-09-08 | Low-voltage fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821562U true CN201821562U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205240314U Expired - Fee Related CN201821562U (en) | 2010-09-08 | 2010-09-08 | Low-voltage fluorescent lamp |
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| Country | Link |
|---|---|
| CN (1) | CN201821562U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749107A (en) * | 2012-07-10 | 2012-10-24 | 广州柏诚智能科技有限公司 | High-precision time difference type single-pulse ultrasonic flowmeter system and flow measurement method thereof |
-
2010
- 2010-09-08 CN CN2010205240314U patent/CN201821562U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749107A (en) * | 2012-07-10 | 2012-10-24 | 广州柏诚智能科技有限公司 | High-precision time difference type single-pulse ultrasonic flowmeter system and flow measurement method thereof |
| CN102749107B (en) * | 2012-07-10 | 2015-08-05 | 广州柏诚智能科技有限公司 | High precision time difference formula monopulse ultrasonic flowmeter system and measuring flow method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20130908 |