CN106550511A - A kind of light adjusting and controlling device and its implementation - Google Patents
A kind of light adjusting and controlling device and its implementation Download PDFInfo
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- CN106550511A CN106550511A CN201611115214.9A CN201611115214A CN106550511A CN 106550511 A CN106550511 A CN 106550511A CN 201611115214 A CN201611115214 A CN 201611115214A CN 106550511 A CN106550511 A CN 106550511A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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Abstract
The invention discloses a kind of light adjusting and controlling device, including current rectifying and wave filtering circuit, current rectifying and wave filtering circuit is connected with power inverter, startup/control device respectively, startup/control device is connected with power inverter, output current sampling/feedback circuit respectively, and output current sampling/feedback circuit is connected with 0 10V light adjusting circuits.The invention also discloses a kind of implementation method of light adjusting and controlling device.The present invention has simple structure, low cost, is easily achieved and the features such as good dimming effect.
Description
Technical field
The present invention relates to LED drives and control circuit technology, specifically a kind of light adjusting and controlling device and its realization side
Method.
Background technology
With global electric filament lamp be phased out and energy-saving and emission-reduction policy enforcement, LED illumination has obtained quick general
And and infiltration.Meanwhile, also have wide market prospect as the LED drive power of LED illumination key component.Nowadays, LED
Market and technology are gradually ripe, and also overall permeation has arrived every field for its application, under such overall situation, whole LED
Illumination market all is making great efforts to reduce LED product cost, to improve the competitiveness of product in market.With the reduction of LED product cost,
Also decline therewith as the driving power supply price of " heart " of LED lamp.
The 0-10V dimming arrangements for having part on the market be with double operational realize, one of amplifier be used as voltage with
With device, another amplifier is used as reverser, realizes 0-10V dimming functions.And the chip cost of double operational is higher, need more
Discrete components and parts.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above prior art is present, there is provided a kind of simple structure, cost are just
Preferably, be easily achieved and good dimming effect light adjusting and controlling device.
Present invention also offers a kind of implementation method of light adjusting and controlling device.
In order to achieve the above object, the present invention is employed the following technical solutions：A kind of light adjusting and controlling device, including civil power is whole
After stream filtering, the current rectifying and wave filtering circuit of smooth direct current signal is generated；
For starter and the startup/control device of control device；
For the power inverter of power transformation；
For receiving and processing dim signal, the 0-10V light adjusting circuits of an error signal are generated；
For processing the superposed signal of the sampled signal of output current and the error signal of 0-10V light adjusting circuits output, control
Output current size processed, feeds back to startup/control device, realizes the output current sampling/feedback circuit of current constant control；
Wherein, current rectifying and wave filtering circuit is connected with power inverter, startup/control device respectively, startup/control device difference
It is connected with power inverter, output current sampling/feedback circuit, output current sampling/feedback circuit is connected with 0-10V light adjusting circuits
Connect.
The 0-10V light adjusting circuits include voltage follower and the reverser being connected with each other.
The voltage follower includes first resistor R1, second resistance R2,3rd resistor R3, the first stabilivolt ZD1 and
One audion Q1；Wherein, the first end of first resistor R1 is connected with the first circuit, and the second end of first resistor R1 is respectively with second
The first end of resistance R2 is connected with DIM signals, the second end of second resistance R2 base stage and first respectively with the first audion
The negative electrode of stabilivolt ZD1 is connected, and the anode of the first stabilivolt ZD1 is connected with second circuit, the colelctor electrode of the first audion Q1 and
First circuit is connected, and the emitter stage of the first audion Q1 is connected with the first end of 3rd resistor R3, the second end of 3rd resistor R3
It is connected with second circuit.
The reverser includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance B8
With the first operational amplifier U1；Wherein, the emitter stage of the first audion Q1 of second end of the 4th resistance R4 and voltage follower
It is connected, the first end of the 4th resistance R4 the second end respectively with the 5th resistance R5, the first end of the 6th resistance R6 and the first computing
Second end of amplifier U1 is connected, the first end of the 5th resistance R5 the second end respectively with the 7th resistance R7, the 8th resistance R8
Second end is connected with the first end of the first operational amplifier U1, and second end of the 6th resistance R6 is connected with second circuit, the first fortune
The 3rd end for calculating amplifier U1 is connected with second circuit, and the first end of the 7th resistance R7 is connected with the first circuit, the 8th resistance R8
First termination output error signal.
The power converter topologies are inverse-excitation type.
First audion is NPN type triode；First operational amplifier is TL431；Output current sampled signal is
Output current sampling is obtained by sampling resistor RS.
First circuit is VCC, and second circuit is ground.
The implementation method of above-mentioned light adjusting and controlling device, comprises the following steps：
(1), on device after electricity, civil power is rectified into direct current signal through current rectifying and wave filtering circuit, now to startup/control device
One VCC voltage, device start, and start working；
(2), 0-10V dimming interfaces access 0-10V dimmers, and DIM signals generate an error through 0-10V light adjusting circuits
Signal；
(3), output current sampled signal is superimposed generation current feedback signal with the error signal of 0-10V light adjusting circuits, adjusts
Section output current；
(4), current feedback signal feeds back to startup/control device, realizes current constant control.
Step (2) concrete mode is：When voltage follower works, external load is arbitrary value RL；
The emitter current Ib of the first audion Q1 is：
Wherein, Vin is the voltage of dimmer, that is, DIM signals；VF is Vbeo；VL is the voltage for loading RL；
The emitter current Ie of the first audion Q1 is：
Known Ie=(1+ β) Ib, then will 1. 2. formula substitute into, obtain：
If：(1+β)*R3//RL>>R5, then can obtain：
VL≈Vin-VF③
From 3. formula, the output voltage of voltage follower is approximately the value that DIM signals deduct VF；
Purpose in this circuit using voltage follower is used as impedance matching, and its output impedance is analyzed as follows：
Wherein, IL is the electric current for flowing through external arbitrary load RL；
Can obtain through arranging：
Wherein R0It is equivalent output impedance；
If：(1+ β) R3 ＞ ＞ R2, then：
As amplification β of audion is hundreds of order of magnitude, therefore, output impedance R0It is the value of a very little；
Therefore deduce that, the output impedance very little of voltage follower, that is to say, that the effect of voltage follower is to reduce
The input impedance of rear class reverser；
(2) when, reverser works, using void it is short with it is empty disconnected the characteristics of, can be in the hope of：
Wherein,
Vref is the reference voltage of the first operational amplifier, and Ve is the error signal of output；
Obtain after arrangement：
From above formula, when the DIM signals of input are bigger, the error signal of output is less；Conversely, DIM signals are less, by mistake
Difference signal is bigger；
(3), when DIM signals are less than a certain value, voltage follower does not work, and VL now is minima：
So, when DIM signals are less thanWhen, voltage follower does not work, and now, reverser is defeated
The error signal for going out is maximum；
(4), when dimmer is not accessed, DIM signals are equal to VCC, due to the clamping action of the first stabilivolt ZD1, first
The base voltage of audion Q1 is maximum, as the effect of reverser causes the error signal of output minimum；
(5), when the error signal and output current sampled signal of reverser is while the amplifier for being input to current feedback is anti-phase
During end, below equation can be obtained：
Wherein：Io is output current；Rs is the sampling resistor of output current；Vcref is the reference electricity of current feedback amplifier
Pressure；
Through arranging, obtain：
According to above formula, due to R8, R9, Vcref and RS are fixed values, and 0<R8/R9<1 so, when error believe
When number bigger, output current is less, conversely, error signal is less, output current is bigger.
If to make DIM signals be 1V, output current is minimum；When DIM signals are 9V, output current is maximum.
The present invention is had the following advantages and effect relative to prior art：
1st, the present invention includes current rectifying and wave filtering circuit, and current rectifying and wave filtering circuit is connected with power inverter, startup/control device respectively
Connect, startup/control device is connected with power inverter, output current sampling/feedback circuit respectively, output current sampling/feedback
Circuit is connected with 0-10V light adjusting circuits；With simple structure, low cost, it is easily achieved and the features such as good dimming effect.
2nd, the voltage follower in the present invention replaces one-level amplifier with audion, adds some resistance and reaches impedance matching
Effect, be rear class reverser reduce input impedance.
3rd, the reverser TL431 one-level amplifiers in the present invention, using its internal benchmark, it is less to reach input signal,
Output signal is bigger and input signal is bigger, the less effect of output signal.
4th, the present invention only may make up 0-10V light modulation electricity with an audion and a TL431 and minority other components and parts
Road, simple structure are with low cost, it is easy to accomplish.
5th, its dimming effect of the invention is not weaker than the dimming arrangement constituted with double operational, but cost is lower, using effect
It is good.
Description of the drawings
Fig. 1 is a kind of connection block diagram of light adjusting and controlling device；
Fig. 2 is the circuit diagram of 0-10V light adjusting circuits in the present invention；
Fig. 3 is the circuit analysis figure of voltage follower in the present invention；
Fig. 4 is the circuit analysis figure of reverser in the present invention；
Fig. 5 is the actual dimming curve figure of the present invention.
Specific embodiment
For ease of it will be appreciated by those skilled in the art that below in conjunction with the accompanying drawings and embodiment the present invention is made it is further specifically
It is bright.
Embodiment 1：
As shown in Fig. 1～5, a kind of light adjusting and controlling device, after commercial power rectification is filtered, generates smooth direct current signal
Current rectifying and wave filtering circuit；For starter and the startup/control device of control device；Power for power transformation becomes
Parallel operation；For receiving and processing dim signal, the 0-10V light adjusting circuits of an error signal are generated；For processing output current
The output of sampled signal and 0-10V light adjusting circuits error signal superposed signal, controlled output size of current feeds back to and opens
Dynamic/control device, realizes the output current sampling/feedback circuit of current constant control；Wherein, current rectifying and wave filtering circuit is become with power respectively
Parallel operation, startup/control device connection, startup/control device are connected with power inverter, output current sampling/feedback circuit respectively
Connect, output current sampling/feedback circuit is connected with 0-10V light adjusting circuits.
0-10V light adjusting circuits in the present embodiment include the voltage follower being connected with each other and reverser.Such as the 101 of Fig. 2
Shown in module, voltage follower includes first resistor R1, second resistance R2,3rd resistor R3, the first stabilivolt ZD1 and the one or three
Pole pipe Q1；Wherein, the first end of first resistor R1 is connected with the first circuit, the second end of first resistor R1 respectively with second resistance
The first end of R2 is connected with DIM signals, base stage and the first voltage stabilizing respectively with the first audion of the second end of second resistance R2
The negative electrode of pipe ZD1 is connected, and the anode of the first stabilivolt ZD1 is connected with second circuit, the colelctor electrode and first of the first audion Q1
Circuit is connected, and the emitter stage of the first audion Q1 is connected with the first end of 3rd resistor R3, the second end of 3rd resistor R3 and the
Two circuits are connected.
The circuit diagram of the reverser in the present embodiment as shown in 102 modules of Fig. 2, reverser include the 4th resistance R4,
Five resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance B8 and the first operational amplifier U1；Wherein, the 4th resistance R4
Second end is connected with the emitter stage of the first audion Q1 of voltage follower, the first end of the 4th resistance R4 respectively with the 5th resistance
Second end of R5, the first end of the 6th resistance R6 are connected with second end of the first operational amplifier U1, the first of the 5th resistance R5
End is connected with the first end at second end, second end of the 8th resistance R8 and the first operational amplifier U1 of the 7th resistance R7 respectively,
Second end of the 6th resistance R6 is connected with second circuit, and the 3rd end of the first operational amplifier U1 is connected with second circuit, and the 7th
The first end of resistance R7 is connected with the first circuit, the first termination output error signal of the 8th resistance R8.
Output current sampled signal in the present embodiment is obtained by sampling resistor RS samplings, the 103 of its connection such as Fig. 2
Shown in module.
Power converter topologies in the present embodiment are inverse-excitation types；First audion is NPN type triode, the first computing
Amplifier is TL431, and the first circuit is VCC, and second circuit is ground.
The implementation method of above-mentioned light adjusting and controlling device, comprises the following steps：
(1), on device after electricity, civil power is rectified into direct current signal through current rectifying and wave filtering circuit, now to startup/control device
One VCC voltage, device start, and start working；
(2), 0-10V dimming interfaces access 0-10V dimmers, and DIM signals generate an error through 0-10V light adjusting circuits
Signal；
(3), output current sampled signal is superimposed generation current feedback signal with the error signal of 0-10V light adjusting circuits, adjusts
Section output current；
(4), current feedback signal feeds back to startup/control device, realizes current constant control.
Step (2) concrete mode is：Circuit analysis figures of the Fig. 3 for voltage follower, external load are arbitrary value RL；
The emitter current Ib of the first audion Q1 is：
Wherein, Vin is the voltage of dimmer, that is, DIM signals；VF is Vbeo；VL is the voltage for loading RL；
The emitter current Ie of the first audion Q1 is：
Known Ie=(1+ β) Ib, then will 1. 2. formula substitute into, obtain：
If：(1+β)*R3//RL>>R5, then can obtain：
VL≈Vin-VF③
From 3. formula, the output voltage of voltage follower is approximately the value that DIM signals deduct VF；
Purpose in this circuit using voltage follower is used as impedance matching, and its output impedance is analyzed as follows：
Wherein, IL is the electric current for flowing through external arbitrary load RL；
Can obtain through arranging：
Wherein R0It is equivalent output impedance.
If：(1+ β) R3 ＞ ＞ R2, then：
As amplification β of audion is hundreds of order of magnitude, therefore, output impedance R0It is the value of a very little.
Therefore deduce that, the output impedance very little of voltage follower, that is to say, that the effect of voltage follower is to reduce
The input impedance of rear class reverser.
(2), circuit analysis figures of the Fig. 4 for reverser, using void it is short with it is empty disconnected the characteristics of, can be in the hope of：
Wherein,
Vref is the reference voltage of the first operational amplifier, and Ve is the error signal of output.
Obtain after arrangement：
From above formula, when the DIM signals of input are bigger, the error signal of output is less；Conversely, DIM signals are less, by mistake
Difference signal is bigger；
(3), when DIM signals are less than a certain value, voltage follower does not work, and VL now is minima：
So, when DIM signals are less thanWhen, voltage follower does not work, and now, reverser is defeated
The error signal for going out is maximum；
(4), when dimmer is not accessed, DIM signals are equal to VCC, due to the clamping action of the first stabilivolt ZD1, first
The base voltage of audion Q1 is maximum, as the effect of reverser causes the error signal of output minimum；
(5), when the error signal and output current sampled signal of reverser is while the amplifier for being input to current feedback is anti-phase
During end, below equation can be obtained：
Wherein：Io is output current；Rs is the sampling resistor of output current；Vcref is the reference electricity of current feedback amplifier
Pressure.
Through arranging, obtain：
According to above formula, due to R8, R9, Vcref and RS are fixed values, and 0<R8/R9<1 so, when error believe
When number bigger, output current is less, conversely, error signal is less, output current is bigger.
If to make DIM signals be 1V, output current minimum (light modulation shut-off), when DIM signals are 9V, output current is maximum
(all light), actual dimming curve are as shown in Figure 5.
Although first audion Q1 of the present invention in embodiment constitutes voltage follower using NPN type triode, so
And the invention is not restricted to this, those skilled in the art be readily conceivable that using PNP type triode or p-type or N-type mos pipe come
Voltage follower is constituted, and changes other components and parts accordingly, the change should be included within the scope of the present invention.
In addition those skilled in the art are it can also be appreciated that by the first operational amplifier with other chips or part come generation
For TL431, and change other components and parts accordingly, the change should also be included within the scope of the present invention.
Above-mentioned specific embodiment is the preferred embodiments of the present invention, can not be limited the invention, other to appoint
Change or other equivalent substitute modes that what is made without departing from technical scheme, are included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of light adjusting and controlling device, it is characterised in that：After commercial power rectification is filtered, the whole of smooth direct current signal is generated
Stream filter circuit；
For starter and the startup/control device of control device；
For the power inverter of power transformation；
For receiving and processing dim signal, the 0-10V light adjusting circuits of an error signal are generated；
For processing the superposed signal of the sampled signal of output current and the error signal of 0-10V light adjusting circuits output, control defeated
Go out size of current, feed back to startup/control device, realize the output current sampling/feedback circuit of current constant control；
Wherein, current rectifying and wave filtering circuit is connected with power inverter, startup/control device respectively, startup/control device respectively with work(
Rate changer, the connection of output current sampling/feedback circuit, output current sampling/feedback circuit are connected with 0-10V light adjusting circuits.
2. light adjusting and controlling device according to claim 1, it is characterised in that：The 0-10V light adjusting circuits include mutually interconnecting
The voltage follower for connecing and reverser.
3. light adjusting and controlling device according to claim 2, it is characterised in that：The voltage follower includes first resistor
R1, second resistance R2,3rd resistor R3, the first stabilivolt ZD1 and the first audion Q1；Wherein, the first end of first resistor R1
Be connected with the first circuit, the second end of first resistor R1 respectively with the first end of second resistance R2 and being connected for DIM signals, second
Second end of resistance R2 is connected with the negative electrode of the base stage and the first stabilivolt ZD1 of the first audion respectively, the first stabilivolt ZD1's
Anode is connected with second circuit, and the colelctor electrode of the first audion Q1 is connected with the first circuit, the emitter stage of the first audion Q1 with
The first end of 3rd resistor R3 is connected, and the second end of 3rd resistor R3 is connected with second circuit.
4. light adjusting and controlling device according to claim 3, it is characterised in that：The reverser include the 4th resistance R4,
Five resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance B8 and the first operational amplifier U1；Wherein, the 4th resistance R4
Second end is connected with the emitter stage of the first audion Q1 of voltage follower, the first end of the 4th resistance R4 respectively with the 5th resistance
Second end of R5, the first end of the 6th resistance R6 are connected with second end of the first operational amplifier U1, and the first of the 5th resistance R5
End is connected with the first end at second end, second end of the 8th resistance R8 and the first operational amplifier U1 of the 7th resistance R7 respectively,
Second end of the 6th resistance R6 is connected with second circuit, and the 3rd end of the first operational amplifier U1 is connected with second circuit, and the 7th
The first end of resistance R7 is connected with the first circuit, the first termination output error signal of the 8th resistance R8.
5. light adjusting and controlling device according to claim 1, it is characterised in that：The power converter topologies are inverse-excitation type.
6. light adjusting and controlling device according to claim 4, it is characterised in that first audion is NPN type triode；
First operational amplifier is TL431；Output current sampled signal is output current sampling to be obtained by sampling resistor RS.
7. light adjusting and controlling device according to claim 4, it is characterised in that：First circuit is VCC, and second circuit is
Ground.
8. the implementation method of the light adjusting and controlling device according to any one of claim 1～7, it is characterised in that including following
Step：
(1), on device after electricity, civil power is rectified into direct current signal through current rectifying and wave filtering circuit, now to startup/control device one
VCC voltages, device start, and start working；
(2), 0-10V dimming interfaces access 0-10V dimmers, and DIM signals generate an error letter through 0-10V light adjusting circuits
Number；
(3), output current sampled signal is superimposed generation current feedback signal with the error signal of 0-10V light adjusting circuits, adjusts defeated
Go out electric current；
(4), current feedback signal feeds back to startup/control device, realizes current constant control.
9. the implementation method of light adjusting and controlling device according to claim 8, it is characterised in that the concrete side of the step (2)
Formula is：When voltage follower works, external load is arbitrary value RL；
The emitter current Ib of the first audion Q1 is：
Wherein, Vin is the voltage of dimmer, that is, DIM signals；VF is Vbeo；VL is the voltage for loading RL；
The emitter current Ie of the first audion Q1 is：
Known Ie=(1+ β) Ib, then will 1. 2. formula substitute into, obtain：
If：(1+β)*R3//RL>>R5, then can obtain：
VL≈Vin-VF ③
From 3. formula, the output voltage of voltage follower is approximately the value that DIM signals deduct VF；
Purpose in this circuit using voltage follower is used as impedance matching, and its output impedance is analyzed as follows：
Wherein, IL is the electric current for flowing through external arbitrary load RL；
Can obtain through arranging：
Wherein R0It is equivalent output impedance；
If：(1+ β) R3 ＞ ＞ R2, then：
As amplification β of audion is hundreds of order of magnitude, therefore, output impedance R0It is the value of a very little；
Therefore deduce that, the output impedance very little of voltage follower, that is to say, that the effect of voltage follower is to reduce rear class
The input impedance of reverser；
(2) when, reverser works, using void it is short with it is empty disconnected the characteristics of, can be in the hope of：
Wherein,
Vref is the reference voltage of the first operational amplifier, and Ve is the error signal of output；
Obtain after arrangement：
From above formula, when the DIM signals of input are bigger, the error signal of output is less；Conversely, DIM signals are less, error letter
It is number bigger；
(3), when DIM signals are less than a certain value, voltage follower does not work, and VL now is minima：
So, when DIM signals are less thanWhen, voltage follower does not work, now, reverser output
Error signal is maximum；
(4), when dimmer is not accessed, DIM signals are equal to VCC, due to the clamping action of the first stabilivolt ZD1, the one or three pole
The base voltage of pipe Q1 is maximum, as the effect of reverser causes the error signal of output minimum；
(5), when the error signal and output current sampled signal of reverser are input to the amplifier end of oppisite phase of current feedback simultaneously,
Below equation can be obtained：
Wherein：Io is output current；Rs is the sampling resistor of output current；Vcref is the reference voltage of current feedback amplifier；
Through arranging, obtain：
According to above formula, due to R8, R9, Vcref and RS are fixed values, and 0<R8/R9<1 so, when error signal is got over
When big, output current is less, conversely, error signal is less, output current is bigger.
10. the implementation method of light adjusting and controlling device according to claim 9, it is characterised in that：If making DIM signals be 1V
When, output current is minimum；When DIM signals are 9V, output current is maximum.
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| CN114205945A (en) * | 2021-11-24 | 2022-03-18 | 广东新昇电业科技股份有限公司 | Four-in-one dimming circuit adopting primary side feedback and constant voltage |
| CN114205945B (en) * | 2021-11-24 | 2022-10-11 | 广东新昇电业科技股份有限公司 | Four-in-one dimming circuit adopting primary side feedback and constant voltage |
| CN114513878A (en) * | 2022-01-19 | 2022-05-17 | 马瑞利汽车零部件(芜湖)有限公司 | Constant current control circuit and low-voltage constant current system of automobile |
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| CN106550511B (en) | 2018-09-21 |
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Denomination of invention: A dimming control device and its realization method Effective date of registration: 20221127 Granted publication date: 20180921 Pledgee: Agricultural Bank of China Limited Dongyang sub branch Pledgor: HENGDIAN GROUP TOSPO LIGHTING Co.,Ltd. Registration number: Y2022330003224 |
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