CN206851090U - A kind of LED energy saving light modulators based on straight edge line voltage signal - Google Patents
A kind of LED energy saving light modulators based on straight edge line voltage signal Download PDFInfo
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- CN206851090U CN206851090U CN201720675480.0U CN201720675480U CN206851090U CN 206851090 U CN206851090 U CN 206851090U CN 201720675480 U CN201720675480 U CN 201720675480U CN 206851090 U CN206851090 U CN 206851090U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
A kind of LED energy saving light modulators based on straight edge line voltage signal, including：Two PFC rectification modules, constant-current dimming module, vehicle Flow Detection module, siren.The input incoming transport civil power of first PFC rectification modules, the 2nd PFC rectification modules, the output end connection dc bus of first PFC rectification modules, the 2nd PFC rectification modules, the output end of vehicle Flow Detection module connect the first PFC rectification modules, the 2nd PFC rectification modules.Dc bus connects siren, dc bus connection constant-current dimming module, constant-current dimming module connection LED street lamp.A kind of LED energy saving light modulators based on straight edge line voltage signal of the utility model, the communication of vehicle Flow Detection module and all DC/DC constant-current dimming circuits is realized by DC bus-bar voltage, has the advantages that cost is low, simple in construction, easy to control.
Description
Technical field
It the utility model is related to technical field of LED illumination, and in particular to a kind of LED energy-conservations based on straight edge line voltage signal
Light modulator.
Background technology
With the continuous development of LED field, its average life up to 50,000 ~ 100,000 hours, traditional LED street lamp system
The failure occurred in system comes from streetlamp driving power supply mostly, because driving power service life is far below LED street lamp, often occurs
Produced because of driving power failure illumination interrupt phenomenon, not only have impact on the reliability of illuminator, also add maintenance into
This.Traditional LED street lamp system typically uses ac bus power supply mode simultaneously, and a street lamp is equipped with a driving power, if
Street lamp needs to carry out energy-saving dimming according to vehicle flowrate or flow of the people, and existing scheme detects typically by flow detector, then
Signal is passed in each LED drive power, driving power controller adjusts power output, the party in real time according to these signals
Each LED drive power contains communication module under case, and implementation is complicated, and cost is high.If do not used energy saving means, then in car
When flow or small flow of the people, waste of energy is serious.
The content of the invention
For the problems such as traditional LED street lamp of solution does not match that with the driving power life-span, energy-saving scheme is complicated, cost is high.This
Utility model provides a kind of LED energy saving light modulators based on straight edge line voltage signal, and wagon flow is realized by DC bus-bar voltage
The communication of detection module and all DC/DC constant-current dimming circuits is measured, there is the advantages that cost is low, simple in construction, easy to control.Have
Effect solves the waste of energy that conventional road lamp long-time Operation at full power is brought, while the redundancy of effort pattern of PFC rectification modules,
Can effectively solve the problems, such as that LED street lamp does not match that with the driving power life-span.
The technical scheme that the utility model is taken is：
A kind of LED energy saving light modulators based on straight edge line voltage signal, including：Two PFC rectification modules, constant-current dimming mould
Block, vehicle Flow Detection module, siren.
The input incoming transport civil power of first PFC rectification modules, the 2nd PFC rectification modules, the first PFC rectification modules,
The output end connection dc bus of 2nd PFC rectification modules, the output end of vehicle Flow Detection module connect the first PFC rectification moulds
Block, the 2nd PFC rectification modules；
Dc bus connects siren,
Dc bus connects constant-current dimming module, constant-current dimming module connection LED street lamp；
The vehicle Flow Detection module, for the vehicle flowrate voltage signal of sampling to be passed into PFC rectification modules；
The PFC rectification modules, for according to vehicle flowrate voltage signal, adjusting the amplitude of output voltage.
The constant-current dimming module includes DC/DC constant-current dimming circuits, signal conditioning circuit, PWM module；
The input of DC/DC constant-current dimming circuits carries out voltage sampling and connects signal conditioning circuit, by signal condition
Circuit, it is converted into voltage reference value Vref；
The output end output current of DC/DC constant-current dimming circuits is sampled and connects comparator, comparator connection PWM
Module, PWM module connection DC/DC constant-current dimming circuits；
DC/DC constant-current dimming circuit output end output currents are sampled, the sampled voltage V1 and voltage reference that will be obtained
Value VrefThrough comparing amplification, error signal is obtained；PWM module adjustment is inputted after compensating module compensates again, regulation DC/DC is permanent
Flow light adjusting circuit and change output current.
The signal conditioning circuit includes five divider resistance R1、R2、R3、R4、R5, three current-limiting resistance R6、R7、R8, three
Output diode D1、D2、D3, three window voltage comparators；
Each window voltage comparator is all made up of the unit of five ports two voltage comparators and a resistance, the
1. Single port meets voltage comparator A1Normal phase input end, 2. second port meets voltage comparator A1Inverting input, the 3rd end
3. mouth meets voltage comparator A2Normal phase input end, 4. the 4th port meets voltage comparator A2Inverting input, voltage comparator
A1And A2Voltage is provided by VCC2, and by resistance R and voltage comparator A1、A2Output end simultaneously connect fifth port 5.；
Second resistance R2Input resistance R is passed through by power supply VCC1 positive pole1Access, second resistance R2One end and another
One end connect respectively the first port of first window voltage comparator 1. with the 4th port 4., first window voltage comparator
2. 3. second port meets input voltage VI simultaneously with the 3rd port, fifth port is 5. through current-limiting resistance R6Meet output diode D1's
Anode, output diode D1Negative electrode and other two-way output diode and couple output port；In current-limiting resistance R6With output
Diode D1Between node meet voltage-stabiliser tube Z1, voltage-stabiliser tube Z1Negative pole is connected with the node, plus earth；
3rd resistor R3Input termination second resistance R2The other end, 3rd resistor R3One end and the other end connect respectively
The first interface of the voltage comparator of two windows and the 4th interface, the second interface and the 3rd of second window voltage comparator
Interface meets input voltage VI simultaneously, and fifth port is through current-limiting resistance R6Meet output diode D2Anode, output diode D2The moon
The output diode of pole and other two-way simultaneously couples output port；In current-limiting resistance R6With output diode D2Between node connect
Voltage-stabiliser tube Z2, voltage-stabiliser tube Z2Negative pole is connected with the node, plus earth；
4th resistance R4A termination 3rd resistor R3The other end, the 4th resistance R4The other end pass through resistance R5Ground connection,
4th resistance R4One end and the other end connect the first interface and the 4th interface of the 3rd window voltage comparator respectively, the 3rd
The second interface of window voltage comparator and the 3rd interface access input voltage VI simultaneously, and fifth port is through current-limiting resistance R8Simultaneously
Access voltage-regulator diode Z3Negative electrode and output diode D3Anode, voltage-regulator diode Z3Plus earth, output diode D3
Negative electrode and other two-way output diode and couple output port.
A kind of LED energy-saving dimming methods based on straight edge line voltage signal, traditional LED drive power are separated, PFC is whole
Connected between flow module and DC/DC constant-current dimming circuits by dc bus, DC/DC constant-current dimming circuits without electrochemical capacitor,
Reliability is high, service life length.
A kind of LED energy-saving dimming methods based on straight edge line voltage signal, using two PFC rectification moulds of identical the first
Block, the 2nd PFC rectification modules, are connected with redundant fashion, are broken down when one of, another detects power output abruptly increase
When, emergent operating mode will be entered, that is, export a specific voltage magnitude, now power output is reduced by one by constant-current dimming module
Half, siren work.
A kind of LED energy-saving dimming methods based on straight edge line voltage signal, signal conditioning circuit use multiple window voltages
Comparator, the corresponding multistage constant voltage output of multilevel ranges control source is realized, it is defeated in each range signals modulate circuit
Go out a steady state value, a reference value as error amplifier.
A kind of LED energy saving light modulators based on straight edge line voltage signal of the utility model, technique effect are as follows：
1. the utility model realizes vehicle Flow Detection module by DC bus-bar voltage signal and adjusted with all DC/DC constant currents
The communication of optical circuit, cost is low, simple in construction, easy to control, efficiently solves conventional road lamp long-time Operation at full power and brings
Waste of energy.
2. the utility model connects PFC rectification modules and DC/DC constant-current dimming circuits, while DC/DC using dc bus
Constant-current dimming circuit is without electrochemical capacitor, and reliability is high, service life length.
3. the utility model employs two PFC power module redundancy of effort patterns, power factor correction function, when it
In a failure, system still has an output current, and reliability is high, solves LED street lamp and is not matched that with the driving power life-span
The problem of.
4. the utility model is simple in construction, easy to operate, numeral can be added on existing equipment if any accurate light modulation needs
Light modulating device, you can realize.
5. constant-current dimming inside modules output current reference data, being controlled by the voltage signal of dc bus, thus export
Electric current can change with the change of DC bus-bar voltage, reduce LED street lamp power output when vehicle flowrate is few, realize energy-conservation
Purpose.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic diagram of the embodiment of the utility model constant-current dimming module one.
Fig. 3 is the schematic diagram of the embodiment of signal conditioning circuit one in the utility model constant-current dimming module.
Fig. 4 is the circuit diagram for the window voltage comparator that the utility model uses.
Fig. 5 is the circuit simulation figure of the embodiment of the utility model signal conditioning circuit one.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of LED energy saving light modulators based on straight edge line voltage signal, including two PFC rectification modules,
Constant-current dimming module, vehicle Flow Detection module, siren.
The input incoming transport civil power of first PFC rectification modules, the 2nd PFC rectification modules, the first PFC rectification modules,
The output end connection dc bus of 2nd PFC rectification modules, the output end of vehicle Flow Detection module connect the first PFC rectification moulds
Block, the 2nd PFC rectification modules.
Dc bus connects siren,
Dc bus connects constant-current dimming module, constant-current dimming module connection LED street lamp.
The vehicle Flow Detection module, for the vehicle flowrate voltage signal of sampling to be passed into PFC rectification modules.
The PFC rectification modules, for according to vehicle flowrate voltage signal, adjusting the amplitude of output voltage.
DC bus-bar voltage change is controlled by the first PFC rectification modules, the 2nd PFC rectification modules, DC bus-bar voltage
Fluctuation will directly determine the output current of DC/DC constant-current dimming circuits, and then determine the power output of LED street lamp.
Vehicle Flow Detection module can use ground sense wagon detector pd132.
Siren can use model:SF-503 sirens.
Whole illuminator running status is as follows：
Illuminator input AC civil power normal work, vehicle Flow Detection module detect people from section or vehicle flowrate in real time
Situation, when without vehicle flowrate, whole system is operated in state 1；When there is vehicle to enter the section, whole illuminator is with state
2 start；When vehicle increases, system switchs to state 3；When vehicle is excessive, system switchs to state 4；Vehicle flowrate reduce when, system by
Level conversion state.
During one of them failure of the first PFC rectification modules, the 2nd PFC rectification modules, another can detect output
Excursion simultaneously enters emergent operating mode, that is, exports a specific voltage magnitude U4, siren alarm, now DC/DC constant currents tune
Power output is reduced half by optical circuit, and LED street lamp is still in working condition；
State 1：During without vehicle flowrate, vehicle Flow Detection module will not output signal, the first PFC rectification modules, the 2nd PFC are whole
Flow module is in holding state, inactivity output, and LED street lamp does not work.
State 2：Vehicle flowrate hour, the first PFC rectification modules, the 2nd PFC rectification modules are sent out according to vehicle Flow Detection module
The signal 1 gone out improves output voltage, and busbar voltage rises to U1, DC/DC constant-current dimming circuits are according to U1Raising outputs current to I1,
Output current now is 50% or so of LED street lamp rated current, and LED street lamp is in low-light level state.
State 3：When vehicle flowrate is more, the first PFC rectification modules, the 2nd PFC rectification modules are sent out according to vehicle Flow Detection module
The signal 2 gone out improves output voltage, busbar voltage U1It is increased to U2, DC/DC constant-current dimming circuits according to U2 improve output current to
I2, output current now is 70% or so of LED street lamp rated current, and LED street lamp is in middle luminance state；
State 4：When vehicle flowrate is excessive, the first PFC rectification modules, the 2nd PFC rectification modules are according to vehicle Flow Detection module
The signal 3 sent improves output voltage, busbar voltage U2It is increased to U3, DC/DC constant-current dimming circuits are according to U3 raising output currents
To I3, output current now is more than the 80% of LED street lamp rated current, and LED street lamp is in high brightness state.
As shown in Fig. 2 constant-current dimming module includes DC/DC constant-current dimming circuits, signal conditioning circuit, PWM module.
The input of DC/DC constant-current dimming circuits carries out voltage sampling and connects signal conditioning circuit, by signal conditioning circuit, turns
Turn to voltage reference value Vref.The output end output current of DC/DC constant-current dimming circuits is sampled and connects comparator, is compared
Device connects PWM module, PWM module connection DC/DC constant-current dimming circuits.To DC/DC constant-current dimming circuit output end output currents
Sampled, by obtained sampled voltage V1 and voltage reference value VrefThrough comparing amplification, error signal input PWM module is obtained
Adjustment, regulation DC/DC constant-current dimming circuits change output current and reach light modulation purpose.The input electricity of DC/DC constant-current dimming circuits
Press as 350V ~ 400V, during normal work, input voltage is in 400V or so, voltage reference value VrefFor 3.5V, output current is
300mA, now LED street lamp be in high brightness state, when input voltage is reduced to 375V, voltage reference value VrefIt is reduced to 2.65V,
PWM module acts on light adjusting circuit simultaneously, and adjustment output current is reduced to 245mA, and LED street lamp is in middle luminance state, works as input
When voltage is reduced to 350V, voltage reference value Vref1.75V is reduced to, while PWM module acts on light adjusting circuit, adjusts output current
175mA is reduced to, LED street lamp is in low-light level state.
The circuit module that PWM module can be built using model TL494 chip.
As shown in figure 3, the signal conditioning circuit includes five divider resistance R1、R2、R3、R4、R5, three current-limiting resistances
R6、R7、R8, three output diode D1、D2、D3, three window voltage comparators（6 voltage comparators and 6 resistance are formed）,
The number of window voltage comparator should determine according to practical application.
As shown in figure 4, each window voltage comparator has all formed five ends by two voltage comparators and a resistance
1. the unit of mouth, first port meet voltage comparator A1Normal phase input end, 2. second port meets voltage comparator A1It is anti-phase defeated
Enter end, 3. the 3rd port meets voltage comparator A2Normal phase input end, 4. the 4th port meets voltage comparator A2Anti-phase input
End, voltage comparator A1And A2Voltage is provided by VCC2, and by resistance R and voltage comparator A1、A2Output end connect the simultaneously
Five ports are 5.；
Second resistance R2Input resistance R is passed through by power supply VCC1 positive pole1Access, second resistance R2One end and another
One end connect respectively the first port of first window voltage comparator 1. with the 4th port 4., first window voltage comparator
2. 3. second port meets input voltage VI simultaneously with the 3rd port, fifth port is 5. through current-limiting resistance R6Meet output diode D1's
Anode, output diode D1Negative electrode and other two-way output diode and couple output port；In current-limiting resistance R6With output
Diode D1Between node meet voltage-stabiliser tube Z1, voltage-stabiliser tube Z1Negative pole is connected with the node, plus earth；
3rd resistor R3Input termination second resistance R2The other end, 3rd resistor R3One end and the other end connect respectively
The first interface of the voltage comparator of two windows and the 4th interface, the second interface and the 3rd of second window voltage comparator
Interface meets input voltage VI simultaneously, and fifth port is through current-limiting resistance R6Meet output diode D2Anode, output diode D2The moon
The output diode of pole and other two-way simultaneously couples output port；In current-limiting resistance R6With output diode D2Between node connect
Voltage-stabiliser tube Z2, voltage-stabiliser tube Z2Negative pole is connected with the node, plus earth；
4th resistance R4A termination 3rd resistor R3The other end, the 4th resistance R4The other end pass through resistance R5Ground connection,
4th resistance R4One end and the other end connect the first interface and the 4th interface of the 3rd window voltage comparator respectively, the 3rd
The second interface of window voltage comparator and the 3rd interface access input voltage VI simultaneously, and fifth port is through current-limiting resistance R8Simultaneously
Access voltage-regulator diode Z3Negative electrode and output diode D3Anode, voltage-regulator diode Z3Plus earth, output diode D3
Negative electrode and other two-way output diode and couple output port.
As shown in figure 5, the embodiment analogous diagram of signal conditioning circuit one, only gives circuit when input is 4.1V and imitates
True figure, this circuit can realize three constant voltage outputs in input voltage 3.6V-4.2V, and otherwise circuit output voltage is zero.
Input voltage is in 4V-4.2V, voltage comparator A1、A2High level is exported, by current-limiting resistance R9By voltage-regulator diode Z1By electricity
Pressure is fixed on 3V, voltage comparator B1、B2、C1、C2Export low level, output diode D1、D2、D3Reverse cut-off determine it is defeated
It is 3V to go out voltage；Input voltage is in 3.8V-4.0V, voltage comparator B1、B2High level is exported, by current-limiting resistance R10By steady
Press diode Z2By voltage stabilization in 2V, voltage comparator A1、A2、C1、C2Export low level, output voltage 2V；Input voltage
In 3.6V-3.8V, voltage comparator C1、C2High level is exported, by current-limiting resistance R11By voltage-regulator diode D3By voltage stabilization
In 1V, voltage comparator A1、A2、B1、B2Export low level, output voltage 1V.
In summary, the utility model realizes vehicle Flow Detection module and all DC/DC perseverances by DC bus-bar voltage
The communication of light adjusting circuit is flowed, there is the advantages that cost is low, simple in construction, easy to control, efficiently solves conventional road lamp for a long time
The waste of energy that Operation at full power is brought, while the redundancy of effort pattern of PFC rectification modules can effectively solve LED street lamp with driving
The problem of dynamic power source life does not match that, the utility model are applied to the working environment of general street lighting, such as tunnel illumination, street
Road illuminates, Landscape Lighting etc., can reach the target of high reliability and energy-conservation, and above-mentioned implementation example is used for the purpose of operation principle
Illustrate simple and construct an example of constant-current dimming module, in actual applications, can according to actual conditions to this programme slightly
Make improvements, reach optimization efficiency and cost-effective purpose.
It is to illustrate the utility model example that above-mentioned implementation example of the present utility model, which is only, and is not to this
The restriction of the embodiment of utility model.For those of ordinary skill in the field, on the basis of the above description also
Other various forms of changes and variation can be made.Here all embodiments can not be exhaustive.It is every to belong to this
The obvious changes or variations that the technical scheme of utility model is amplified out still in the scope of protection of the utility model it
Row.
Claims (3)
- A kind of 1. LED energy saving light modulators based on straight edge line voltage signal, it is characterised in that including：Two PFC rectification modules, perseverances Flow light-adjusting module, vehicle Flow Detection module, siren；The input incoming transport civil power of first PFC rectification modules, the 2nd PFC rectification modules, the first PFC rectification modules, second The output end connection dc bus of PFC rectification modules, the output end of vehicle Flow Detection module connect the first PFC rectification modules, the Two PFC rectification modules；Dc bus connects siren,Dc bus connects constant-current dimming module, constant-current dimming module connection LED street lamp；The vehicle Flow Detection module, for the vehicle flowrate voltage signal of sampling to be passed into PFC rectification modules；The PFC rectification modules, for according to vehicle flowrate voltage signal, adjusting the amplitude of output voltage.
- A kind of 2. LED energy saving light modulators based on straight edge line voltage signal according to claim 1, it is characterised in that：It is described Constant-current dimming module includes DC/DC constant-current dimming circuits, signal conditioning circuit, PWM module；The input of DC/DC constant-current dimming circuits carries out voltage sampling and connects signal conditioning circuit, by signal condition electricity Road, it is converted into voltage reference value Vref；The output end output current of DC/DC constant-current dimming circuits is sampled and connects comparator, comparator connection PWM module, PWM module connects DC/DC constant-current dimming circuits；DC/DC constant-current dimming circuit output end output currents are sampled, by obtained sampled voltage V1 and voltage reference value Vref Through comparing amplification, PWM module adjustment is inputted after obtaining error signal, regulation DC/DC constant-current dimming circuits change output current.
- A kind of 3. LED energy saving light modulators based on straight edge line voltage signal according to claim 2, it is characterised in that：It is described Signal conditioning circuit includes five divider resistance R1、R2、R3、R4、R5, three current-limiting resistance R6、R7、R8, three output diodes D1、D2、D3, three window voltage comparators；Each window voltage comparator is all made up of the unit of five ports, first end two voltage comparators and a resistance 1. mouth meets voltage comparator A1Normal phase input end, 2. second port meets voltage comparator A1Inverting input, the 3rd port is 3. Meet voltage comparator A2Normal phase input end, 4. the 4th port meets voltage comparator A2Inverting input, voltage comparator A1With A2Voltage is provided by VCC2, and by resistance R and voltage comparator A1、A2Output end simultaneously connect fifth port 5.；Second resistance R2Input resistance R is passed through by power supply VCC1 positive pole1Access, second resistance R2One end and the other end Connect respectively the first port of first window voltage comparator 1. with the 4th port 4., the second of first window voltage comparator 2. 3. port meets input voltage VI simultaneously with the 3rd port, fifth port is 5. through current-limiting resistance R6Meet output diode D1Anode, Output diode D1Negative electrode and other two-way output diode and couple output port；In current-limiting resistance R6With exporting two poles Pipe D1Between node meet voltage-stabiliser tube Z1, voltage-stabiliser tube Z1Negative pole is connected with the node, plus earth；3rd resistor R3Input termination second resistance R2The other end, 3rd resistor R3One end and the other end connect second respectively The first interface of the voltage comparator of window and the 4th interface, the second interface and the 3rd interface of second window voltage comparator Input voltage VI is met simultaneously, fifth port is through current-limiting resistance R6Meet output diode D2Anode, output diode D2Negative electrode with The output diode of other two-way simultaneously couples output port；In current-limiting resistance R6With output diode D2Between node connect voltage stabilizing Pipe Z2, voltage-stabiliser tube Z2Negative pole is connected with the node, plus earth；4th resistance R4A termination 3rd resistor R3The other end, the 4th resistance R4The other end pass through resistance R5Ground connection, the 4th Resistance R4One end and the other end connect the first interface and the 4th interface of the 3rd window voltage comparator, the 3rd window respectively The second interface of voltage comparator and the 3rd interface access input voltage VI simultaneously, and fifth port is through current-limiting resistance R8Access simultaneously Voltage-regulator diode Z3Negative electrode and output diode D3Anode, voltage-regulator diode Z3Plus earth, output diode D3The moon The output diode of pole and other two-way simultaneously couples output port.
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