CN2679967Y - Light modulation circuit of electromagnetic induction lamp - Google Patents
Light modulation circuit of electromagnetic induction lamp Download PDFInfo
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- CN2679967Y CN2679967Y CN 200420019790 CN200420019790U CN2679967Y CN 2679967 Y CN2679967 Y CN 2679967Y CN 200420019790 CN200420019790 CN 200420019790 CN 200420019790 U CN200420019790 U CN 200420019790U CN 2679967 Y CN2679967 Y CN 2679967Y
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Abstract
The utility model discloses a light modulation circuit of electromagnetic induction lamp, which is connected with a circuit of light modulating electromagnetic induction lamp at least including an active power factor corrector, a central processing unit, an electromagnetic sensor and a power output device. The light modulation circuit comprises a closed-ring control signal generator of light modulation connected with the active power factor corrector and the central processing unit, a feedback compensator of lamp power connected with the central processing unit, an oscillating timer connected with the central processing unit, a sample-taking signalizer of lamp current connected with the electromagnetic sensor and the central processing unit and a sample-taking signalizer of lamp voltage connected with the electromagnetic sensor and the central processing unit. This technical proposal increases the functions of monitoring the lamp running state and proceeding real time adjustment. The running efficiency of the electromagnetic induction lamp is further improved, and the service life is prolonged.
Description
Technical field
The utility model relates to electromagnetic inductive lamp circuit, relates in particular to a kind of light adjusting circuit that is used for electromagnetic inductive lamp circuit.
Background technology
Electromagnetic induction lamp belongs to the new-generation energy-saving product of no filament, high light efficiency, long-life, high power factor, can be widely used in the place that family, factory building, office space, road, engineering construction building site, particularly fluorescent tube should not change.Because electromagnetic induction lamp belongs to electrodeless startup and lights, fluorescent tube is not existed because of filament damages or the electronics powder launch and the sputter of electronics powder causes problem such as fluorescent tube blackout to put in order the phenomenon that lamp is scrapped, put in order the lamp life-span to prolong greatly.And operating frequency exceeds 200KHz, can eliminate stroboscopic phenomenon.But the difficulty of the circuit design of electromagnetic induction lamp is bigger, and also there are many problems in the electromagnetic inductive lamp circuit that has at present.
Fig. 1 is the circuit diagram of the electromagnetic inductive lamp circuit of prior art, does not comprise among Fig. 1 that anti-emi filter, bridge rectifier and active power factor corrector, this several sections are the universal component of electromagnetic induction lamp, just no longer describes here.In the circuit as shown in Figure 1, metal-oxide-semiconductor 100 and 102 semi-bridge inversion oscillating circuit, central processing unit 104, electromagnetic inductor 106, the power take offs 108 that constitute.Also comprise some other auxiliary circuit among this figure, comprise protective circuit and start-up control circuit, these are not that of the present utility model this advances part, will continue to continue to use for these circuit in the technical solution of the utility model, have not therefore just elaborated.In traditional electromagnetic inductive lamp circuit shown in Figure 1, central processing unit is the L6570 chip, and this chip provides square wave for two metal-oxide-semiconductors 100 and 102, and power take off 108 is an inductance.The operating frequency of the electromagnetic induction lamp of prior art is about 250KHz, and light efficiency is between 50-60Lm/W.During work, because the switching time of circuit is longer, cause the temperature of metal-oxide-semiconductor 100 and 102 higher, simultaneously, use L6570 as the central processing unit function singleness now, the function that does not have light modulation, and shortage can not be adjusted the operating state of electromagnetic induction lamp according to real-time ruuning situation to the sampling monitoring of the voltage and current of electromagnetic induction lamp.
Summary of the invention
The purpose of this utility model provides a kind of light adjusting circuit that is used for electromagnetic inductive lamp circuit, and it can promptly realize dimming function according to the sampled signal of lamp current and modulating voltage being controlled the power of adjusting electromagnetic induction lamp.
Another purpose of the present utility model provides a kind of electromagnetic inductive lamp circuit, and the above-mentioned light adjusting circuit of its use is realized the power adjustment to electromagnetic induction lamp, promptly realizes dimming function.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of light adjusting circuit of electromagnetic induction lamp is connected on the electromagnetic inductive lamp circuit, and described electromagnetic inductive lamp circuit comprises active power factor corrector, central processing unit, electromagnetic inductor and power take off at least, and wherein, described light adjusting circuit comprises:
Closed loop dimming control signal device links to each other with described active power factor corrector and described central processing unit;
Lamp Feedback of Power compensator links to each other with described central processing unit;
Capacitance-resistance vibration timer links to each other with described central processing unit;
Lamp current sampled signal device links to each other with described electromagnetic inductor and described central processing unit;
The lamp voltage sample annunciator links to each other with described electromagnetic inductor and described central processing unit.
According to embodiment of the present utility model, described central processing unit is the HY4501 chip.Described closed loop dimming control signal device comprises the oscillating circuit that potentiometer and electric capacity composes in parallel and the resistance of several series connection.Described lamp Feedback of Power compensator is together in parallel with another resistance and form after by a resistance and a capacitances in series.Described capacitance-resistance vibration timer comprises electric capacity and a resistance at least.Described lamp voltage sample annunciator comprises that at least one is connected in parallel on the resistance on the fluorescent tube.Described lamp current sampled signal device comprises that at least one is connected on inductance and on the fluorescent tube and is connected in parallel on resistance on the fluorescent tube.
A kind of electromagnetic inductive lamp circuit comprises at least:
Active power factor corrector;
Power take off links to each other with described active power factor corrector;
Electromagnetic inductor links to each other with described power take off, is also connected to the electromagnetic induction lamp fluorescent tube;
Central processing unit,
Wherein, also comprise light adjusting circuit, this light adjusting circuit comprises,
Closed loop dimming control signal device is with described active power factor corrector and described central processing unit
Link to each other;
Lamp Feedback of Power compensator links to each other with described central processing unit;
Capacitance-resistance vibration timer links to each other with described central processing unit;
Lamp current sampled signal device links to each other with described electromagnetic inductor and described central processing unit;
The lamp voltage sample annunciator links to each other with described electromagnetic inductor and described central processing unit.
Also comprise according to the described electromagnetic inductive lamp circuit of embodiment of the present utility model: anti-interference em filtering device links to each other with the input power supply; Bridge rectifier links to each other with described anti-interference em filtering device, is also connected to described active power factor corrector; Protective circuit links to each other with central processing unit with described power take off; The start-up control circuit links to each other with the input power supply, is also connected to electromagnetic induction lamp.
According to embodiment of the present utility model, central processing unit described in this electromagnetic inductive lamp circuit is the HY4051 chip; Described closed loop dimming control signal device comprises the oscillating circuit that potentiometer and electric capacity composes in parallel and the resistance of several series connection; Described lamp Feedback of Power compensator is together in parallel with another resistance and form after by a resistance and a capacitances in series; Described capacitance-resistance vibration timer comprises electric capacity and a resistance at least; Described lamp voltage sample annunciator comprises that at least one is connected in parallel on the resistance on the fluorescent tube; Described lamp current sampled signal device comprises that at least one is connected on inductance and on the fluorescent tube and is connected in parallel on resistance on the fluorescent tube.
Description of drawings
Fig. 1 is the partial circuit figure of the electromagnetic inductive lamp circuit of conventional art;
Fig. 2 is the block diagram of the partial circuit of electromagnetic inductive lamp circuit of the present utility model;
Fig. 3 is the circuit diagram of the partial circuit of electromagnetic inductive lamp circuit of the present utility model.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
Fig. 2 is the block diagram of the partial circuit of electromagnetic induction lamp of the present utility model, as shown in Figure 2, light adjusting circuit of the present utility model is connected in electromagnetic inductive lamp circuit, this electromagnetic inductive lamp circuit should comprise active power factor corrector 200, central processing unit 202, electromagnetic inductor 204 and power take off 206 at least, in the embodiment shown in Figure 2, active power factor corrector 200 is connected to power take off 206, and it is to press for late-class circuit provides galvanic current.Electromagnetic inductor 204 also is connected to power take off 206, is also connected to electromagnetic induction lamp fluorescent tube (not shown).Power take off 206 is used to provide power output.Central processing unit 202 does not directly link to each other with above-mentioned each parts, and it is the operation that is used to control entire circuit.Light adjusting circuit of the present utility model is to be connected on the above-mentioned electromagnetic inductive lamp circuit, this light adjusting circuit comprises closed loop dimming control signal device 208, link to each other with active power factor corrector 200 and central processing unit 202, its comparative voltage of sampling, and provide effective control voltage signal to central processing unit 202, in one embodiment, its range of signal of providing is at the direct voltage of 0V-4V.Lamp Feedback of Power compensator 210 links to each other with central processing unit 202.Capacitance-resistance vibration timer 2 12 links to each other with central processing unit 202, and it is the minimum and the highest operating frequency that is used for determining central processing unit 202.Lamp current sampled signal device 214 links to each other with electromagnetic inductor 204 and central processing unit 202, the current signal of the electromagnetic inductor 204 that is used for sampling, and difference is input to and does active rectification in the central processing unit 202.Lamp voltage sample annunciator 216 links to each other with electromagnetic inductor 204 and central processing unit 202, and the voltage signal of collection electromagnetic inductor 204 also outputs in the central processing unit 202.
Fig. 3 is the partial circuit of an embodiment of the present utility model, i.e. the circuit diagram of light adjusting circuit part.As shown in Figure 3, the central processing unit that uses among this embodiment is the HY4501 chip, and this chip is an electric ballast special circuit with dimming function, and its dimming scope is between 10%-100%.In this embodiment, closed loop dimming control signal device 208 is made up of resistance R 1, R2, potentiometer R3 and capacitor C 1, the resistance value of potentiometer R3 is adjustable, and itself and capacitor C 1 together constitute a RC oscillating circuit, changes its frequency of oscillation by the resistance of adjusting potentiometer R3.The output signal of closed loop dimming control signal device 208 is input to the DIM pin of HY4501 chip.Among this embodiment, lamp Feedback of Power compensator 210 is together in parallel with resistance R 6 and constitute after by resistance R 5 series capacitance C2, its output is connected to the CRECT pin of HY4051 chip, the signal voltage of being gathered by lamp Feedback of Power compensator 210 is admitted to internal error amplifier input terminal in the HY4051 chip as negative-feedback signal, to realize close loop negative feedback.Among this embodiment, capacitance-resistance vibration timer 2 12 comprises a resistance R T, and it is connected to the RF pin and a capacitor C T of HY4501 chip, it is connected to the CF pin of HY4501 chip and constitutes, and resistance R T and capacitor C T and HY4501 chip determine the height of entire circuit operating frequency jointly.Lamp current sampled signal device 214 among this embodiment is one to be connected on inductance L N and on the fluorescent tube and to be connected in parallel on resistance R 4 on the fluorescent tube, and its sampling lamp tube current signal also is input to the IL1 and the IL2 pin of HY4501 chip.And lamp voltage sample annunciator 216 is one to be connected in parallel on the resistance R 7 on the fluorescent tube, and the voltage signal of the fluorescent tube of its sampling is input to the VL pin of HY4501 chip.In Fig. 3, L1 is a power take off 206.
The utility model also provides a kind of electromagnetic inductive lamp circuit that adopts above-mentioned light adjusting circuit, and it should comprise following parts at least:
Active power factor corrector;
Power take off links to each other with active power factor corrector;
Electromagnetic inductor links to each other with power take off, is also connected to the electromagnetic induction lamp fluorescent tube;
Central processing unit,
Light adjusting circuit, this light adjusting circuit comprise,
Closed loop dimming control signal device links to each other with active power factor corrector and central processing unit;
Lamp Feedback of Power compensator links to each other with central processing unit;
Capacitance-resistance vibration timer links to each other with central processing unit;
Lamp current sampled signal device links to each other with electromagnetic inductor and described central processing unit;
The lamp voltage sample annunciator links to each other with electromagnetic inductor and described central processing unit.
These circuit blocks just can adopt the disclosed circuit diagram of Fig. 2 and Fig. 3 to realize, in addition, this electromagnetic inductive lamp circuit also should comprise,
Anti-interference em filtering device links to each other with the input power supply;
Bridge rectifier links to each other with anti-interference em filtering device, is also connected to active power factor corrector;
Protective circuit links to each other with central processing unit with power take off;
The start-up control circuit links to each other with the input power supply, is also connected to electromagnetic induction lamp.
Above-mentioned anti-interference em filtering device, bridge rectifier, protective circuit and start-up control circuit all be adopt with prior art in identical circuit; this is known for those skilled in the art; therefore just no longer done detailed description here, also just no longer provided for the circuit diagram of these parts.Use this kind circuit inductance to answer lamp can in the wide-voltage range of 85-300V, carry out light modulation, and can make power keep stable according to monitoring to lamp current and voltage signal.
The utility model provides a kind of electromagnetic inductive lamp circuit that is used for the light adjusting circuit of electromagnetic induction lamp and uses this light adjusting circuit, increased for the monitoring of lamp operation situation and the function of adjusting in real time, further improve the operational efficiency of electromagnetic induction lamp, prolonged its useful life.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be under the situation that does not break away from utility model thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (10)
1. the light adjusting circuit of an electromagnetic induction lamp, be connected on the electromagnetic inductive lamp circuit, described electromagnetic inductive lamp circuit comprises active power factor corrector, central processing unit, electromagnetic inductor and power take off at least, it is characterized in that, described light adjusting circuit comprises:
Closed loop dimming control signal device links to each other with described active power factor corrector and described central processing unit;
Lamp Feedback of Power compensator links to each other with described central processing unit;
Capacitance-resistance vibration timer links to each other with described central processing unit;
Lamp current sampled signal device links to each other with described electromagnetic inductor and described central processing unit;
The lamp voltage sample annunciator links to each other with described electromagnetic inductor and described central processing unit.
2. light adjusting circuit as claimed in claim 1 is characterized in that, described central processing unit is the HY4501 chip.
3. light adjusting circuit as claimed in claim 1 is characterized in that, described closed loop dimming control signal device comprises the oscillating circuit that potentiometer and electric capacity composes in parallel and the resistance of several series connection.
4. light adjusting circuit as claimed in claim 1 is characterized in that, described lamp Feedback of Power compensator is together in parallel with another resistance and form after by a resistance and a capacitances in series.
5. light adjusting circuit as claimed in claim 1 is characterized in that, described capacitance-resistance vibration timer comprises electric capacity and a resistance at least.
6. light adjusting circuit as claimed in claim 1 is characterized in that, described lamp voltage sample annunciator comprises that at least one is connected in parallel on the resistance on the fluorescent tube.
7. light adjusting circuit as claimed in claim 1 is characterized in that, described lamp current sampled signal device comprises that at least one is connected on inductance and on the fluorescent tube and is connected in parallel on resistance on the fluorescent tube.
8. electromagnetic inductive lamp circuit comprises at least:
Active power factor corrector;
Power take off links to each other with described active power factor corrector;
Electromagnetic inductor links to each other with described power take off, is also connected to the electromagnetic induction lamp fluorescent tube;
Central processing unit,
It is characterized in that, also comprise light adjusting circuit, this light adjusting circuit comprises,
Closed loop dimming control signal device is with described active power factor corrector and described central processing unit
Link to each other;
Lamp Feedback of Power compensator links to each other with described central processing unit;
Capacitance-resistance vibration timer links to each other with described central processing unit;
Lamp current sampled signal device links to each other with described electromagnetic inductor and described central processing unit;
The lamp voltage sample annunciator links to each other with described electromagnetic inductor and described central processing unit.
9. electromagnetic inductive lamp circuit as claimed in claim 8 is characterized in that, also comprises:
Anti-interference em filtering device links to each other with the input power supply;
Bridge rectifier links to each other with described anti-interference em filtering device, is also connected to described active power factor corrector;
Protective circuit links to each other with central processing unit with described power take off;
The start-up control circuit links to each other with the input power supply, is also connected to electromagnetic induction lamp.
10. electromagnetic inductive lamp circuit as claimed in claim 8 or 9 is characterized in that,
Described central processing unit is the HY4051 chip;
Described closed loop dimming control signal device comprises the oscillating circuit that potentiometer and electric capacity composes in parallel and the resistance of several series connection;
Described lamp Feedback of Power compensator is together in parallel with another resistance and form after by a resistance and a capacitances in series;
Described capacitance-resistance vibration timer comprises electric capacity and a resistance at least;
Described lamp voltage sample annunciator comprises that at least one is connected in parallel on the resistance on the fluorescent tube;
Described lamp current sampled signal device comprises that at least one is connected on inductance and on the fluorescent tube and is connected in parallel on resistance on the fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019790 CN2679967Y (en) | 2004-01-21 | 2004-01-21 | Light modulation circuit of electromagnetic induction lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019790 CN2679967Y (en) | 2004-01-21 | 2004-01-21 | Light modulation circuit of electromagnetic induction lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2679967Y true CN2679967Y (en) | 2005-02-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019790 Expired - Lifetime CN2679967Y (en) | 2004-01-21 | 2004-01-21 | Light modulation circuit of electromagnetic induction lamp |
Country Status (1)
| Country | Link |
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| CN (1) | CN2679967Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384127B (en) * | 2008-10-16 | 2012-07-04 | 上海交通大学 | Energy-saving light modulating device with unit power factor |
-
2004
- 2004-01-21 CN CN 200420019790 patent/CN2679967Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384127B (en) * | 2008-10-16 | 2012-07-04 | 上海交通大学 | Energy-saving light modulating device with unit power factor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090513 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |