CN103857097B - A kind of control circuit and light fixture - Google Patents
A kind of control circuit and light fixture Download PDFInfo
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- CN103857097B CN103857097B CN201210494689.9A CN201210494689A CN103857097B CN 103857097 B CN103857097 B CN 103857097B CN 201210494689 A CN201210494689 A CN 201210494689A CN 103857097 B CN103857097 B CN 103857097B
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Abstract
The application relates to light adjusting circuit field, and the embodiment of the present application provides a kind of control circuit and light fixture.The control circuit that the present embodiment provides includes constant-current driven module, processor and bus communication module, by arranging a constant-current driven module, with the signal of telecommunication stable to light source and the offer of each module, improves the stability of control circuit.And, by arranging a processor so that it is be connected to the switch element being connected with light source, for controlling disconnection and the Guan Bi of switch element, it is controlled light source is lighted and extinguishes, the control signal that the quick answer processor of light source can be made to export, improves the flash of light conversion efficiency of light source.Further, by arranging bus communication module, it is achieved control circuit and the data exchange of ambient controller, the stability of Based Intelligent Control, high efficiency and expansion are improved, it is ensured that piece electrical efficiency.
Description
Technical field
The application relates to light adjusting circuit field, particularly relates to a kind of control circuit and light fixture.
Background technology
At present, airport airstrips or taxiway are fitted with navigational lighting aid, and this navigational lighting aid is to ensure that aircraft
The necessary facility of entering and leaving port Normal Take-Off And Landing in the case of night or low visibility.The duty of sailing-assisting lamp system,
Reliability is most important to the safe landing of aircraft.
Sequence flash lights, as the one of aid-to-navigation light, is mainly used in the navigation instruction of airfield runway.Now, dodge
Light modulation typically uses conventional light source, such as high-voltage gas discharging light, halogen tungsten lamp etc..This filament of light source easily burns
Bad, life-span short power consumption is big and brightness is low, and navigation effect is poor, needs frequently to change light source.And, airport helps
Boat lamp is powered and is used constant-current dimmer to power, and current value is relatively big, and existing sequence flash lights used can not meet
The high-stability requirement of aid-to-navigation light, and the demand that conversion efficiency is high.
Summary of the invention
Based on this, it is provided that a kind of efficiency is high, low control circuit and light fixture are lost.
The problem existed for above-mentioned prior art, the first aspect of the application provides a kind of control circuit, uses
In controlling the switch of light source in light fixture, to control the break-make of described light source, described control circuit includes:
Switch element, the outfan of described switch element is connected to the positive pole of described light source；
Constant-current driven module, the input of described constant-current driven module is connected to civil power by isolating transformer and hands over
Stream input, the cathode output end of described constant-current driven module is connected to described light source by described switch element
Positive pole, the cathode output end of described constant-current driven module be connected to described light source negative pole；
Processor, the power input of described processor is connected to the cathode output end of described constant-current driven module,
For obtaining constant DC voltage, the output control terminal of described processor is connected to described switch element；
Bus communication module, the outfan of externally connected communication bus network is logical to receive described outside
The bus control signal of communication network output, and described bus control signal is converted into level controling signal, its
In, described bus communication module is additionally coupled to the input of described processor and controls end, is used for exporting described level
Control signal to described processor, so that described processor is opened according to controlling after described level controling signal
Pass unit, thus light source described in break-make and the connection between described constant-current driven module.
In conjunction with the application first aspect, in the implementation that the first is possible, described constant-current driven module bag
Include:
Rectification filtering module, the input of described rectification filtering module is the input of described constant-current driven module,
The input of described rectification filtering module is connected to described mains input by isolating transformer, described
First output head grounding of rectification filtering module；
Power transformation module, the first outfan of the secondary output end of described power transformation module is described constant-current driven module
Cathode output end, the first input end of the primary input terminal of described power transformation module is connected to described rectifying and wave-filtering
Second outfan of module, to obtain galvanic current pressure, the of the secondary output end of described power transformation module
One outfan is connected to the positive pole of described light source by described switch element；
Current feedback module, including detection resistance, one end of the detection resistance of described current feedback module is institute
Stating the first test side of current feedback module, the other end of described detection resistance is described current feedback module
Second test side, the first test side of described current feedback module is connected to the secondary output of described power transformation module
Second outfan of end, the second test side of described current feedback module is connected to the negative pole of described light source, uses
The current value of described light source is flow through in detection；
Feedback isolation module, the first signal input part of described feedback isolation module is just being connected to described light source
Pole, the secondary signal input of described feedback isolation module is connected to the signal output of described current feedback module
End is for obtaining the current value flowing through described light source, by electrical isolation, strong to be converted into capacity of resisting disturbance
The detection signal of telecommunication；
Switch power module, the power end of described switch power module is connected to the of described rectification filtering module
Two outfans, the first feedback end of described switch power module is connected to the first electricity of described feedback isolation module
Signal output part, the second feedback end of described switch power module is connected to the second of described feedback isolation module
Electrical signal, for obtaining the described anti-interference energy that described feedback isolation module is changed through electrical isolation
The detection signal of telecommunication that power is strong, the primary input terminal controlling end and described power transformation module of described switch power module
The second input connect, for obtaining according to the first feedback end and second feedback end of described switch power module
The detection signal of telecommunication that the described capacity of resisting disturbance that takes is strong, to regulate the electricity controlling end of described switch power module
Stream, by changing dutycycle so that described power transformation module exports stable electric current.
In conjunction with the first possible implementation of the first aspect of the application, in the realization side that the second is possible
In formula, described rectification filtering module includes rectifier bridge D1, electrochemical capacitor C1 and electric capacity C2；Described rectifier bridge
First and second input of D1 is respectively first input end and second input of described rectification filtering module,
First and second outfan of described rectifier bridge D1 be respectively described rectification filtering module the first outfan and
Second outfan, the positive pole of described electrochemical capacitor C1 and first end of described electric capacity C2 are connected to described whole
Second outfan of stream bridge D1, the negative pole of described electrochemical capacitor C1 and second end of described electric capacity C2 all connect
Ground.
In conjunction with the implementation that the second of the first aspect of the application is possible, in the realization side that the third is possible
In formula, described constant-current driven module also includes high voltage protective module, and the input of described high voltage protective module is even
Being connected to the second outfan of described rectification filtering module, the outfan of described high voltage protective module is connected to described
Second input of the primary input terminal of power transformation module, is used for preventing from puncturing described light source, described high voltage protective
Module includes electric capacity C3, resistance R1 and diode D2, first end of described resistance R1 and described electric capacity C3
The first end be connected to second outfan of described rectifier bridge D1, second end of described resistance R1 and described
Second end of electric capacity C3 is connected to the negative electrode of described diode D2, and the anode of described diode D2 connects
Control end to described switch power module.
The implementation possible in conjunction with the second of the first aspect of the application or the third possible realization side
Formula, in the 4th kind of possible implementation, described switch power module includes DC/DC transducer, switch
Pipe Q1 and divider resistance R2, described DC/DC transducer include power end, control end, first input end,
Second input and outfan；The power supply that power end is described switch power module of described DC/DC transducer
End, first feedback end that first input end is described switch power module of described DC/DC transducer, described
Second feedback end that second input is described switch power module of DC/DC transducer, described switching tube Q1
The control end that outfan is described switch power module, the outfan of described DC/DC transducer leaves with described
The input closing pipe Q1 connects, and described divider resistance R2 is connected to the control end of described DC/DC transducer
And between ground.
In conjunction with the first possible implementation of the first aspect of the application, the 5th kind of possible realization side
In formula, described power transformation module is high frequency transformer T1, and the primary input terminal of described power transformation module is described high frequency
The primary coil of transformator T1, the secondary output end of described power transformation module is the secondary of described high frequency transformer T1
Level coil.
In conjunction with the first possible implementation of the first aspect of the application, the 6th kind of possible realization side
In formula, also include that output stage filter circuit, described output stage filter circuit include diode D3, electrochemical capacitor
C4 and electric capacity C5, the anode of described diode D3 is connected to the first of the secondary output end of described power transformation module
Outfan, the of the negative electrode of described diode D3, the positive pole of described electrochemical capacitor C4 and described electric capacity C5
One end is commonly connected to the input of described switch element, the negative pole of described electrochemical capacitor C4 and described electric capacity
Second end of C5 is commonly connected to the second outfan of the secondary output end of described power transformation module, described power transformation mould
First outfan of the secondary output end of block is connected to the input of described switch element by described diode D3
End.
In conjunction with the first possible implementation of the first aspect of the application, the 7th kind of possible realization side
In formula, described feedback isolation module includes photo-coupler U1 and divider resistance R3, described photo-coupler U1
Positive pole and the institute of described light source it is connected to including light emitting diode D4 and audion Q2, described divider resistance R3
State between the anode of light emitting diode D4, the negative electrode of described light emitting diode D4 and described current feedback module
Control end connect, the first feedback end of the colelctor electrode of described audion Q2 and described switch power module is even
Connecing, the emitter stage of described audion Q2 is connected with the second feedback end of described switch power module.
The second aspect of the application provides a kind of light fixture, described light fixture include the application first aspect or
In conjunction with any one provided in the several possible embodiment of the first aspect of the application.
Above-mentioned control circuit and light fixture are by arranging a constant-current driven module, to provide steady to light source and each module
The fixed signal of telecommunication, improves the stability of described control circuit.And, by arranging a processor so that it is
It is connected to the switch element being connected with described light source, for controlling disconnection and the Guan Bi of described switch element, with
Light source is lighted and extinguishes and be controlled, the control signal that the quick answer processor of light source exports can be made,
Reach the purpose of Based Intelligent Control light source flash of light, improve the flash of light conversion efficiency of light source further.Further,
By arranging bus communication module, it is achieved the internal circuit of flash lamp and the data exchange of ambient controller, enter
One step improves the stability of Based Intelligent Control, high efficiency and expansion, and the high stability meeting aid-to-navigation light needs
Summation high performance demands, it is ensured that piece electrical efficiency, so above-mentioned control circuit has efficiency height and loss
Low feature.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the application, below by embodiment required use attached
Figure is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the application,
For those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other accompanying drawing.
The theory diagram of a kind of control circuit that Fig. 1 provides for the embodiment of the present application；
Fig. 2 for the embodiment of the present application provide based in the control circuit shown in Fig. 1 constant-current driven module electricity
The module diagram on road；
The schematic diagram of the control circuit that Fig. 3 provides for the embodiment of the present application.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clearly
Chu, it is fully described by.
Refer to the theory diagram of a kind of control circuit that Fig. 1, Fig. 1 provide for the embodiment of the present application.Such as Fig. 1
Shown in, the control circuit that the present embodiment provides is for controlling the switch of light source in light fixture, to control the logical of light source
Disconnected, the control circuit that the present embodiment provides includes: switch element 110, constant-current driven module 120, processor
130 and bus communication module 140 and light source 150.
Wherein, the outfan of switch element 110 is connected to the positive pole of light source.
The input of constant-current driven module 120 is connected to civil power by isolating transformer (not shown) and hands over
Stream input, the cathode output end of constant-current driven module 120 is connected to light source 150 by switch element 110
Positive pole, the cathode output end of constant-current driven module 120 be connected to light source 150 negative pole.
The power input of processor 130 is connected to the cathode output end of constant-current driven module 120, is used for obtaining
Taking constant DC voltage, the output control terminal of processor 130 is connected to switch element 110.
Bus communication module 140, the outfan of externally connected communication bus network, to receive PERCOM peripheral communication
The bus control signal of network output, and bus control signal is converted into level controling signal, wherein, always
Line communication module 140 is additionally coupled to the input of processor 130 and controls end, controls signal to for output level
Processor 130, so that processor 130 is according to controlling switch element 110 after level controling signal, thus break-make
Connection between light source 150 and constant-current driven module 120.
Constant-current driven module 120 is for the output voltage constant to light source 150 and the offer of each module, and constant current is driven
Dynamic model block 120 makes light source 150 always work at specified constant current state, it is ensured that the efficiency of piece electrical, so that
Control circuit has the advantage that efficiency is high and loss is low.
By arranging the control signal that processor 130 can make light source quick answer processor 130 export, reach
To the purpose of Based Intelligent Control light source 150 flash of light, improve the flash of light conversion efficiency of light source 150 further.
Bus communication module 140 is for bus control signal is converted into Transistor-Transistor Logic level control signal, permissible
Use level shifting circuit to realize bus communication module 140, i.e. realize PERCOM peripheral communication level and processor 130 it
Between signal conversion and signal transmit, it is achieved for controlling the internal control circuit of light source and ambient controller
Data exchange, and concrete implementation mode does not constitute the restriction to the present embodiment.
Specifically, bus communication module 140 is used for receiving the bus control signal of communication bus network delivery,
So that bus control signal to be converted into Transistor-Transistor Logic level control signal, then output bus communication module 140 is changed
Transistor-Transistor Logic level control signal to processor 130, so that processor 130 is according to receiving Transistor-Transistor Logic level control
Signal controls to be connected to disconnection and the Guan Bi of the switch element of light source 150, with lighting and putting out light source 150
Go out or the brightness of LED is controlled.
The control circuit that the present embodiment provides is by arranging a constant-current driven module 120, with to light source 150 and each
Module provides the stable signal of telecommunication, improves the stability of control circuit.And, by arranging a processor
130 so that it is be connected to the switch element being connected with light source 150, for controlling disconnection and the Guan Bi of switch element,
With lighting and extinguishing or the brightness of LED is controlled light source 150, can make at light source quickly response
The control signal of reason device 130 output, reaches the purpose of Based Intelligent Control light source 150 flash of light, improves further
The flash of light conversion efficiency of light source 150.Further, by arranging bus communication module 140, it is achieved be used for controlling
The control circuit of the inside of light source 150 flash of light and the data exchange of ambient controller, improve intelligence further
Stability, high efficiency and the expansion controlled, meets high stability requirement and the high performance demands of aid-to-navigation light,
Ensure that piece electrical efficiency, so above-mentioned control circuit has the advantages that efficiency is high and loss is low.
Refer to Fig. 2, Fig. 2 for the embodiment of the present application provide based on the constant current in the control circuit shown in Fig. 1
Drive the module diagram of module 120 circuit.Based on the control circuit shown in Fig. 1, the present embodiment is to constant current
Drive module 120 it is further proposed that improve.As in figure 2 it is shown, the control circuit that the present embodiment provides includes out
Close unit 110, constant-current driven module 120, processor 130, bus communication module 140 and light source 150,
Wherein, constant-current driven module 120 includes rectification filtering module 121, power transformation module 122, current feedback module
123, feedback isolation module 124, switch power module 125 and high voltage protective module 126.Wherein, electric current
Feedback module 123 includes a detection resistance.
Wherein, the outfan of switch element 110 is connected to the positive pole of light source.
And in constant-current driven module 120, the input of rectification filtering module 121 is constant-current driven module
The input of 120, the input of rectification filtering module 121 is connected by isolating transformer (not shown)
To mains input, the first output head grounding of rectification filtering module 121.
The positive pole that first outfan is constant-current driven module 120 output of the secondary output end of power transformation module 122
End, the first input end of the primary input terminal of power transformation module 122 is connected to the second of rectification filtering module 121
Outfan, to obtain galvanic current pressure, the first outfan of the secondary output end of power transformation module 122 leads to
Cross switch element 110 and be connected to the positive pole of light source 150.
First test side that one end is current feedback module 123 of the detection resistance of current feedback module 123,
Second test side that the other end is current feedback module 123 of detection resistance, the of current feedback module 123
One test side is connected to the second outfan of the secondary output end of power transformation module 122, current feedback module 123
The second test side be connected to the negative pole of light source 150, flow through the current value of light source 150 for detection.
First signal input part of feedback isolation module 124 is connected to the positive pole of light source 150, feedback isolation mould
The secondary signal input of block 124 is connected to the signal output part of current feedback module 123, is used for obtaining stream
Cross the current value of light source 150, by electrical isolation, the detection signal of telecommunication strong to be converted into capacity of resisting disturbance.
Switch power module 125, the power end of switch power module 125 is connected to rectification filtering module 121
Second outfan, the first feedback end of switch power module 125 is connected to the first of feedback isolation module 124
Electrical signal, the second feedback end of switch power module 125 is connected to the of feedback isolation module 124
Two electrical signals, for obtaining the capacity of resisting disturbance that feedback isolation module 124 is changed through electrical isolation
The strong detection signal of telecommunication, the primary input terminal controlling end and power transformation module 122 of switch power module 125
Second input connects, for the first feedback end according to switch power module 125 and switch power module 125
The strong detection signal of telecommunication of capacity of resisting disturbance that obtains of the second feedback end, to regulate switch power module 125
Control the electric current of end, by changing dutycycle so that power transformation module 122 exports stable electric current to light source 150.
High voltage protective module 126, is used for protecting switch power module 125, wherein, high voltage protective module 126
Input be connected to the outfan of rectification filtering module 121, the outfan of high voltage protective module 126 connects
Control end to switch power module 125.
The power input of processor 130 is connected to the first end of the secondary output end of power transformation module 122, uses
In obtaining constant DC voltage, the output control terminal of processor 130 is connected to switch element 110.
Bus communication module 140, the outfan of externally connected communication bus network, to receive PERCOM peripheral communication
The bus control signal of network output, and bus control signal is converted into level controling signal, wherein, always
Line communication module 140 is additionally coupled to the input of processor 130 and controls end, controls signal to for output level
Processor 130, so that processor 130 is according to controlling switch element 110 after level controling signal, thus break-make
Connection between light source 150 and constant-current driven module 120.
Constant-current driven module 120 is for the output voltage constant to light source 150 and the offer of each module, and constant current is driven
Dynamic model block 120 makes light source 150 always work at specified constant current state, it is ensured that the efficiency of piece electrical, so that
Control circuit has the advantage that efficiency is high and loss is low.
By arranging the control signal that processor 130 can make light source quick answer processor 130 export, reach
To the purpose of Based Intelligent Control light source 150 flash of light, improve the flash of light conversion efficiency of light source 150 further.
Bus communication module 140 is for bus control signal is converted into Transistor-Transistor Logic level control signal, permissible
Use level shifting circuit to realize bus communication module 140, i.e. realize PERCOM peripheral communication level and processor 130 it
Between signal conversion and signal transmit, it is achieved for controlling the internal control circuit of light source and ambient controller
Data exchange, and concrete implementation mode does not constitute the restriction to the present embodiment.
Specifically, bus communication module 140 is used for receiving the bus control signal of communication bus network delivery,
So that bus control signal to be converted into Transistor-Transistor Logic level control signal, then output bus communication module 140 is changed
Transistor-Transistor Logic level control signal to processor 130, so that processor 130 is according to receiving Transistor-Transistor Logic level control
Signal controls to be connected to disconnection and the Guan Bi of the switch element of light source 150, with lighting and putting out light source 150
Go out or the brightness of LED is controlled.
In the constant-current driven module 120 that the present embodiment provides, rectification filtering module 121 is for becoming isolation
The output voltage rectification of depressor is galvanic current pressure, thus is supplied for light source 150 by power transformation module 122
Electricity.Current feedback module 123, for obtaining the electric current on light source 150 by detection resistance, flows through with monitoring
The size of the electric current of light source 150, and then monitoring situation is fed back to switch electricity by feedback isolation module 124
Source module 125, so that switch power module 125 is according to first feedback end and second of switch power module 125
The feedback current that feedback end detects, the electric current controlling end of regulation switch power module 125, by changing
Variable duty cycle is so that constant-current driven module 120 exports stable electric current.Usually, when switch power module 125
The first feedback end and the second feedback end receive feedback current less than preset specified constant current time, switch electricity
Source module 125 then controls the output voltage of power transformation module 122 and increases, so that the electric current in light source 150 increases
Big to specified constant current value.When the feedback that the first feedback end and second feedback end of switch power module 125 receive
When current value is more than the specified constant current preset, switch power module 125 then controls the output of power transformation module 122
Voltage reduces, so that the electric current in light source 150 is reduced to specified constant current value.
Specifically, the secondary output voltage rectification of isolating transformer is stable straight by rectification filtering module 121
Stream voltage, and by powering to after the conversion of power transformation module 122 light source 150.Current feedback module 123 is used
Electric current in detection light source 150, and by feedback isolation module 124, the current feedback of light source 150 is given
Switch power module 125, switch power module 125 controls power transformation module 122 according to the feedback current received
Output voltage size thus the electric current that realizes controlling in light source 150 are always for constant current.
In the present embodiment, the constant-current driven module 120 that control circuit provides is by current feedback module 123
The electric current of detection light source 150, and the electric current of detection is sent to Switching Power Supply by feedback isolation module 124
Module 125, when the electric current of current feedback module 123 detection is less than specified constant current, switch power module
125 output voltages controlling power transformation module 122 increase, and make the electric current in light source 150 increase to constant current；Work as electricity
When the electric current of stream feedback module 123 detection is higher than specified constant current, switch power module 125 controls power transformation mould
The output voltage of block 122 reduces, and makes the electric current in light source 150 be decreased to constant current.So that light source 150 1
Directly being operated in specified constant current state, the switch power module 125 wherein used is capable of efficiently turning of energy
Change, it is ensured that piece electrical efficiency, so above-mentioned control circuit has the advantage that efficiency is high and loss is low.
Refer to the schematic diagram of the control circuit that Fig. 3, Fig. 3 provide for the embodiment of the present application.As it is shown on figure 3,
The present embodiment provide control circuit include switch element 110, constant-current driven module 120, processor 130,
Bus communication module 140 and light source 150, wherein, constant-current driven module 120 include rectification filtering module 121,
Power transformation module 122, current feedback module 123, feedback isolation module 124, switch power module 125, height
Pressure protection module 126 and output stage filter circuit 127.Wherein, rectification filtering module 121 includes rectifier bridge
D1, electrochemical capacitor C1 and electric capacity C2.High voltage protective module 126 includes electric capacity C3, resistance R1 and two poles
Pipe D2.Switch power module 125 includes DC/DC transducer, switching tube Q1 and divider resistance R2.Become
Electricity module 122 is high frequency transformer T1, and the primary input terminal of power transformation module 122 is high frequency transformer T1's
Primary coil, the secondary output end of power transformation module 122 is the secondary coil of high frequency transformer T1.Output stage is filtered
Wave circuit 127 includes diode D3, electrochemical capacitor C4 and electric capacity C5.Feedback isolation module 124 includes light
Bonder U1 and divider resistance R3, photo-coupler U1 include light emitting diode D4 and audion Q2.
Wherein, processor 120 and the annexation of bus communication module 130 and operation principle and above-mentioned right
Annexation and the operation principle of Fig. 1 with Fig. 2 are identical, therefore do not repeat at this, existing in constant-current drive circuit
The annexation of each element do described below:
Wherein, the first input end and second that first and second input is rectification filtering module of rectifier bridge D1
Input, first outfan that first and second outfan is rectification filtering module of rectifier bridge D1 and second defeated
Going out end, the positive pole of electrochemical capacitor C1 and first end of electric capacity C2 are connected to second output of rectifier bridge D1
End, the negative pole of electrochemical capacitor C1 and the second equal ground connection of end of electric capacity C2.
First end of resistance R1 and first end of electric capacity C3 are connected to second outfan of rectifier bridge D1,
Second end of resistance R1 and second end of electric capacity C3 are connected to the negative electrode of diode D2, diode D2's
Anode is connected to the control end of switch power module 125.
DC/DC transducer includes power end, controls end, first input end, the second input and outfan；
The power end of DC/DC transducer is the power end of switch power module 125, and the first of DC/DC transducer is defeated
Entering the end the first feedback end for switch power module 125, the second input of DC/DC transducer is switch electricity
Second feedback end of source module 125, the outfan of switching tube Q1 is the control end of switch power module 125,
The outfan of DC/DC transducer is connected with the input of switching tube Q1, and divider resistance R2 is connected to DC/DC
Between control end and the ground of transducer.
The positive pole that first outfan is constant-current driven module 120 output of the secondary output end of power transformation module 122
End, the first input end of the primary input terminal of power transformation module 122 is connected to the second of rectification filtering module 121
Outfan, to obtain galvanic current pressure, the first outfan of the secondary output end of power transformation module 122 leads to
Cross switch element 110 and be connected to the positive pole of light source 150.Wherein, power transformation module 122 is high frequency transformer T1,
The primary input terminal of power transformation module 122 is the primary coil of high frequency transformer T1, the secondary of power transformation module 122
Outfan is the secondary coil of high frequency transformer T1.
In output stage filter circuit 127, the first end of the secondary output end of power transformation module 122 passes through two poles
Pipe D3 is connected to the input of switch element 110.Wherein, the anode of diode D3 is connected to power transformation module
First outfan of the secondary output end of 122, the negative electrode of diode D3, the positive pole of electrochemical capacitor C4 and electricity
The first end holding C5 is commonly connected to the input of switch element 110, the negative pole of electrochemical capacitor C4 and electric capacity
Second end of C5 is commonly connected to the second outfan of the secondary output end of power transformation module 122.
Photo-coupler U1 includes that light emitting diode D4 and audion Q2, divider resistance R3 are connected to light source 150
Positive pole and the anode of light emitting diode D4 between, the negative electrode of light emitting diode D4 and current feedback module 123
Control end connect, the colelctor electrode of audion Q2 is connected with the first feedback end of switch power module 125, three
The emitter stage of pole pipe Q2 is connected with the second feedback end of switch power module 125.
First test side that one end is current feedback module 123 of the detection resistance of current feedback module 123,
Second test side that the other end is current feedback module 123 of detection resistance, the of current feedback module 123
One test side is connected to the second outfan of the secondary output end of power transformation module 122, current feedback module 123
The second test side be connected to the negative pole of light source 150, flow through the current value of light source 150 for detection.
When switching tube Q1 ends, the outfan of switching tube Q1 can produce the highest induced voltage, specifically,
Induced voltage can be up to more than 1000V, and such sensing high pressure can make switching tube Q1 punch through damage.Therefore,
Tandem high pressure protection module 126 between the outfan and the outfan of rectification filtering module 121 of switching tube Q1
After, electric capacity C3 is charged by sensing high pressure by diode D2, and can lead to immediately after electric capacity C3 charging
Cross resistance R1 electric discharge, thus absorb sensing high pressure, reach to protect the purpose of switching tube Q1.
Based on above-mentioned all embodiments, the operation principle of constant-current driven module 120 circuit is as follows:
The secondary output of isolating transformer is connected with the rectifier bridge D1 of rectification filtering module 121, and electric current is rectified
Filter through electrochemical capacitor C1 and electric capacity C2 again after bridge D1 rectification, export stable to power transformation module 122
DC voltage.The voltage transformation of reception is become the pressure drop size that light source 150 needs by power transformation module 122.Especially
Ground, the output voltage of power transformation module 122 makes the operating current of light source 150 be the specified constant current value set.
Electric current in the current sense resistor R4 detection light source 150 of current feedback module 123, and by detection
Current feedback is to feedback isolation module 124.Feedback current is converted to optical signal and turns by feedback isolation module 124
Change current signal into and be sent to switch power module 125.Switch power module 125 is according to the feedback current received
Size controls the output voltage size of power transformation module 122.
DC/DC transducer in switch power module 125 is the energy storage characteristic utilizing electric capacity, inductance, passes through
Gate-controlled switch (MOSFET etc.) carries out the action of HF switch, by the electrical power storage of input at electric capacity (sense)
In, when the switches are opened, electric energy is released to load again, it is provided that energy, the power of its output or voltage capability
Relevant with dutycycle (by switch conduction times and the ratio in the cycle of whole switch).Therefore, DC/DC turns
Parallel operation has the effect of boosting and blood pressure lowering.I.e. the first feedback end and second by switch power module 125 is anti-
The current value that feedback end detects, the electric current controlling end of regulation switch power module 125, by changing duty
Ratio is so that constant-current driven module 120 exports stable electric current.
Therefore, when the current value of current feedback module 123 feedback is higher than specified constant current value, Switching Power Supply
Module 125 plays hypotensive effect, makes the output voltage of power transformation module 122 reduce, so that light source 150
Operating current decreases up to specified constant current value.Current value in current feedback module 123 feedback is less than specified
Constant current value time, switch power module 125 plays boosting, makes the output voltage of power transformation module 122 increase
Greatly, so that the operating current of light source 150 is increased to specified constant current value.Anti-in current feedback module 123
When the current value of feedback is consistent with specified constant current value, power transformation module 122 is not acted on by switch power module 125,
The output voltage of power transformation module 122 is constant, and the operating current making light source 150 is constant.In above-mentioned control process
In, it is possible to make the operating current of light source 150 always at specified constant current value.
Above-mentioned control circuit is by arranging a constant-current driven module 120, to provide steady to light source 150 and each module
The fixed signal of telecommunication, improves the stability of control circuit.And, by arranging a processor 130 so that it is even
It is connected to the switch element being connected with light source 150, for controlling disconnection and the Guan Bi of switch element, with to light source
150 light and extinguish or the brightness of LED is controlled, can make the quick answer processor of light source 150
The control signal of 130 outputs so that LED order flash lamp reaches the purpose of Based Intelligent Control light source 150 flash of light,
Improve the flash of light conversion efficiency of light source 150 further.Further, by arranging bus communication module 140,
Realize the data exchange of lamp interior control circuit and ambient controller, improve the steady of Based Intelligent Control further
Qualitative, high efficiency and expansion, meet high stability requirement and the high performance demands of aid-to-navigation light, it is ensured that
Piece electrical efficiency, so above-mentioned control circuit has the advantages that efficiency is high and loss is low.
It is above the preferred implementation of the application, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications, these change
Enter and retouch the protection domain being also considered as the application.
Claims (9)
1. a control circuit, for controlling the switch of light source in light fixture, to control the break-make of described light source,
It is characterized in that, described control circuit includes:
Switch element, the outfan of described switch element is connected to the positive pole of described light source；
Constant-current driven module, the input of described constant-current driven module is connected to civil power by isolating transformer and hands over
Stream input, the cathode output end of described constant-current driven module is connected to described light source by described switch element
Positive pole, the cathode output end of described constant-current driven module is connected to the negative pole of described light source, and described constant current is driven
Dynamic model block flows through the current value of described light source for obtaining, and it is strong to be converted into capacity of resisting disturbance by electrical isolation
The detection signal of telecommunication, to export stable electric current；
Processor, the power input of described processor is connected to the cathode output end of described constant-current driven module,
For obtaining constant DC voltage, the output control terminal of described processor is connected to described switch element；
Bus communication module, the outfan of externally connected communication bus network is logical to receive described outside
The bus control signal of communication network output, and described bus control signal is converted into level controling signal, its
In, described bus communication module is additionally coupled to the input of described processor and controls end, is used for exporting described level
Control signal to described processor, so that described processor is opened according to controlling after described level controling signal
Pass unit, thus light source described in break-make and the connection between described constant-current driven module.
2. control circuit as claimed in claim 1, it is characterised in that described constant-current driven module includes:
Rectification filtering module, the input of described rectification filtering module is the input of described constant-current driven module,
The input of described rectification filtering module is connected to described mains input by isolating transformer, described
First output head grounding of rectification filtering module；
Power transformation module, the first outfan of the secondary output end of described power transformation module is described constant-current driven module
Cathode output end, the first input end of the primary input terminal of described power transformation module is connected to described rectifying and wave-filtering
Second outfan of module, to obtain galvanic current pressure, the of the secondary output end of described power transformation module
One outfan is connected to the positive pole of described light source by described switch element；
Current feedback module, including detection resistance, one end of the detection resistance of described current feedback module is institute
Stating the first test side of current feedback module, the other end of described detection resistance is described current feedback module
Second test side, the first test side of described current feedback module is connected to the secondary output of described power transformation module
Second outfan of end, the second test side of described current feedback module is connected to the negative pole of described light source, uses
The current value of described light source is flow through in detection；
Feedback isolation module, the first signal input part of described feedback isolation module is just being connected to described light source
Pole, the secondary signal input of described feedback isolation module is connected to the signal output of described current feedback module
End is for obtaining the current value flowing through described light source, by electrical isolation, strong to be converted into capacity of resisting disturbance
The detection signal of telecommunication；
Switch power module, the power end of described switch power module is connected to the of described rectification filtering module
Two outfans, the first feedback end of described switch power module is connected to the first electricity of described feedback isolation module
Signal output part, the second feedback end of described switch power module is connected to the second of described feedback isolation module
Electrical signal, for obtaining the described anti-interference energy that described feedback isolation module is changed through electrical isolation
The detection signal of telecommunication that power is strong, the primary input terminal controlling end and described power transformation module of described switch power module
The second input connect, for obtaining according to the first feedback end and second feedback end of described switch power module
The detection signal of telecommunication that the described capacity of resisting disturbance that takes is strong, to regulate the electricity controlling end of described switch power module
Stream, by changing dutycycle so that described power transformation module exports stable electric current.
Control circuit the most according to claim 2, it is characterised in that described rectification filtering module includes
Rectifier bridge D1, electrochemical capacitor C1 and electric capacity C2；First and second input of described rectifier bridge D1 is respectively
For first input end and second input of described rectification filtering module, first and second of described rectifier bridge D1
Outfan is respectively the first outfan and second outfan of described rectification filtering module, described electrochemical capacitor C1
Positive pole and first end of described electric capacity C2 be connected to second outfan of described rectifier bridge D1, described electricity
Solve negative pole and the second equal ground connection of end of described electric capacity C2 of electric capacity C1.
Control circuit the most according to claim 3, it is characterised in that described constant-current driven module also wraps
Including high voltage protective module, the input of described high voltage protective module is connected to the second of described rectification filtering module
Outfan, the outfan of described high voltage protective module is connected to the second of the primary input terminal of described power transformation module
Input, is used for preventing from puncturing described light source, described high voltage protective module include electric capacity C3, resistance R1 and
First end of diode D2, described resistance R1 and first end of described electric capacity C3 are connected to described rectifier bridge
Second outfan of D1, second end of described resistance R1 and second end of described electric capacity C3 are connected to described
The negative electrode of diode D2, the anode of described diode D2 is connected to the control end of described switch power module.
5. according to the control circuit described in claim 3 or 4, it is characterised in that described switch power module
Including DC/DC transducer, switching tube Q1 and divider resistance R2, described DC/DC transducer includes power supply
End, control end, first input end, the second input and outfan；The power end of described DC/DC transducer
For the power end of described switch power module, the first input end of described DC/DC transducer is described switch electricity
First feedback end of source module, the second input of described DC/DC transducer is described switch power module
Second feedback end, the control end that outfan is described switch power module of described switching tube Q1, described
The outfan of DC/DC transducer is connected with the input of described switching tube Q1, and described divider resistance R2 connects
Between control end and the ground of described DC/DC transducer.
Control circuit the most according to claim 2, it is characterised in that described power transformation module is that high frequency becomes
Depressor T1, the primary input terminal of described power transformation module is the primary coil of described high frequency transformer T1, described
The secondary output end of power transformation module is the secondary coil of described high frequency transformer T1.
Control circuit the most according to claim 2, it is characterised in that also include output stage filter circuit,
Described output stage filter circuit includes diode D3, electrochemical capacitor C4 and electric capacity C5, described diode D3
Anode be connected to first outfan of secondary output end of described power transformation module, the moon of described diode D3
First end of pole, the positive pole of described electrochemical capacitor C4 and described electric capacity C5 is commonly connected to described switch element
Input, the negative pole of described electrochemical capacitor C4 and second end of described electric capacity C5 are commonly connected to described change
Second outfan of the secondary output end of electricity module, the first outfan of the secondary output end of described power transformation module
The input of described switch element it is connected to by described diode D3.
Control circuit the most according to claim 2, it is characterised in that described feedback isolation module includes
Photo-coupler U1 and divider resistance R3, described photo-coupler U1 include light emitting diode D4 and audion
Q2, described divider resistance R3 be connected between the positive pole of described light source and the anode of described light emitting diode D4,
The negative electrode of described light emitting diode D4 is connected with the control end of described current feedback module, described audion Q2
Colelctor electrode be connected with the first feedback end of described switch power module, the emitter stage of described audion Q2 and institute
The second feedback end stating switch power module connects.
9. a light fixture, it is characterised in that described light fixture includes as described in claim 1 to 8 any of which
Control circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494689.9A CN103857097B (en) | 2012-11-28 | 2012-11-28 | A kind of control circuit and light fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494689.9A CN103857097B (en) | 2012-11-28 | 2012-11-28 | A kind of control circuit and light fixture |
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| CN103857097A CN103857097A (en) | 2014-06-11 |
| CN103857097B true CN103857097B (en) | 2016-12-21 |
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| CN107333367B (en) * | 2017-07-05 | 2023-09-26 | 深圳市晟碟半导体有限公司 | Parameter adjusting system and method for induction lamp |
| CN110149751B (en) * | 2019-03-05 | 2024-05-24 | 京东科技信息技术有限公司 | Light source control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511142A (en) * | 2009-03-09 | 2009-08-19 | 华南理工大学 | Switch constant-current source circuit without feedback on load end |
| CN101711071A (en) * | 2009-11-25 | 2010-05-19 | 海洋王照明科技股份有限公司 | LED control circuit and LED device |
| CN101720153A (en) * | 2009-12-01 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED dimming control system for airport gliding lamp |
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| KR100766327B1 (en) * | 2004-10-05 | 2007-10-17 | 장종표 | Electric power device using solar cell |
| CN102523657A (en) * | 2011-12-22 | 2012-06-27 | 天津职业技术师范大学 | Projected-agricultural LED lamp for plant growth |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511142A (en) * | 2009-03-09 | 2009-08-19 | 华南理工大学 | Switch constant-current source circuit without feedback on load end |
| CN101711071A (en) * | 2009-11-25 | 2010-05-19 | 海洋王照明科技股份有限公司 | LED control circuit and LED device |
| CN101720153A (en) * | 2009-12-01 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED dimming control system for airport gliding lamp |
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