CN103857097A - Control circuit and light fixture - Google Patents
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- CN103857097A CN103857097A CN201210494689.9A CN201210494689A CN103857097A CN 103857097 A CN103857097 A CN 103857097A CN 201210494689 A CN201210494689 A CN 201210494689A CN 103857097 A CN103857097 A CN 103857097A
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Abstract
This invention discloses a control circuit and a light fixture, belonging to the light modulation circuit field. The control circuit provided by the embodiment of the invention comprises a constant current driving module, a processor and a bus communication module. By arranging the constant current driving module, the light source and all modules are provided with stable electric signals, so that the stability of the control circuit is improved. The processor is arranged and is connected to a switching unit connected to the light source for controlling the switch unit to switch on and off and controlling the light source to be lightened on and off, so that the light source can respond to the control signal outputted by the processor quickly and the flashing conversion efficiency of the light source is improved. Furthermore, the bus communication module is arranged to realize the data exchange between the control circuit and the external controller, which improves the stability, high efficiency and expandability of the intelligent control, and guarantees the 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 runway or taxiway are all provided with navigational lighting aid, and this navigational lighting aid is the necessary facility of guaranteeing aircraft entering and leaving port Normal Take-Off And Landing in night or low visibility situation.Operating state, the reliability of sailing-assisting lamp system are 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 indication of airfield runway.Now, photoflash lamp generally adopts conventional light source, as high-voltage gas discharging light, and tungsten halogen lamp etc.This filament of light source easily burns out, and short power consumption of life-span is large and brightness is low, and navigation effect is poor, needs the frequent light source of changing.And airfield aid power supply adopts constant-current dimmer power supply, current value is larger, and existing sequence flash lights used can not meet the high-stability requirement of aid-to-navigation light, and the high demand of conversion efficiency.
Summary of the invention
Based on this, provide a kind of efficiency is high, loss is low control circuit and light fixture.
The problem existing for above-mentioned prior art, the application's first aspect provides a kind of control circuit, and for controlling the switch of light fixture light source, to control the break-make of described light source, described control circuit comprises:
Switch element, the output 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 ac input end by isolating transformer, the cathode output end of described constant-current driven module is connected to the positive pole of described light source by described switch element, 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, and for obtaining constant direct voltage, the output control terminal of described processor is connected to described switch element;
Bus communication module, be connected to the output of outside communication bus network, to receive the bus control signal of described external communication network output, and convert described bus control signal to level controling signal, wherein, described bus communication module is also connected to the input control end of described processor, be used for exporting described level controling signal to described processor, so that described processor is according to controlling described switch element after described level controling signal, thus being connected between light source and described constant-current driven module described in break-make.
In conjunction with the application's first aspect, in the possible implementation of the first, described constant-current driven module comprises:
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 civil power ac input end by isolating transformer, the first output head grounding of described rectification filtering module;
Power transformation module, the cathode output end that the first output of the secondary output end of described power transformation module is described constant-current driven module, the first input end of the primary input terminal of described power transformation module is connected to the second output of described rectification filtering module, press to obtain galvanic current, the first output of the secondary output end of described power transformation module is connected to the positive pole of described light source by described switch element;
Current feedback module, comprise detection resistance, one end of the detection resistance of described current feedback module is the first test side of described current feedback module, the other end of described detection resistance is the second test side of described current feedback module, the first test side of described current feedback module is connected to the second output of the secondary output end of described power transformation module, the second test side of described current feedback module is connected to the negative pole of described light source, for detection of the current value that flows through described light source;
Feedback isolation module, the first signal input of described feedback isolation module is connected to the positive pole of described light source, the secondary signal input of described feedback isolation module is connected to the signal output part of described current feedback module, for obtaining the current value that flows through described light source, by electrical isolation, to convert the detection signal of telecommunication that antijamming capability is strong to;
Switch power module, the power end of described switch power module is connected to the second output of described rectification filtering module, the first feedback end of described switch power module is connected to the first electrical signal of described feedback isolation module, the second feedback end of described switch power module is connected to the second electrical signal of described feedback isolation module, for obtaining the described antijamming capability strong detection signal of telecommunication of described feedback isolation module through electrical isolation conversion, the control end of described switch power module is connected with the second input of the primary input terminal of described power transformation module, for the strong detection signal of telecommunication of described antijamming capability obtaining according to the first feedback end of described switch power module and the second feedback end, to regulate the electric current of control end of described switch power module, by changing duty ratio so that the electric current of described power transformation module stable output.
In conjunction with the possible implementation of the first of the application's first aspect, in the possible implementation of the second, described rectification filtering module comprises rectifier bridge D1, electrochemical capacitor C1 and capacitor C 2; First and second input of described rectifier bridge D1 is respectively first input end and second input of described rectification filtering module, first and second output of described rectifier bridge D1 is respectively the first output and second output of described rectification filtering module, the first end of the positive pole of described electrochemical capacitor C1 and described capacitor C 2 is all connected to the second output of described rectifier bridge D1, the equal ground connection of the second end of the negative pole of described electrochemical capacitor C1 and described capacitor C 2.
In conjunction with the possible implementation of the second of the application's first aspect, in the third possible implementation, described constant-current driven module also comprises high voltage protective module, the input of described high voltage protective module is connected to the second output of described rectification filtering module, the output of described high voltage protective module is connected to the second input of the primary input terminal of described power transformation module, be used for preventing from puncturing described light source, described high voltage protective module comprises capacitor C 3, resistance R 1 and diode D2, the first end of the first end of described resistance R 1 and described capacitor C 3 is all connected to the second output of described rectifier bridge D1, the second end of described resistance R 1 and the second end of described capacitor C 3 are all connected to the negative electrode of described diode D2, the anodic bonding of described diode D2 is to the control end of described switch power module.
In conjunction with possible implementation or the third the possible implementation of the second of the application's first aspect, in the 4th kind of possible implementation, described switch power module comprises DC/DC transducer, switching tube Q1 and divider resistance R2, and described DC/DC transducer comprises power end, control end, first input end, the second input and output; The power end of described DC/DC transducer is the power end of described switch power module, the first input end of described DC/DC transducer is the first feedback end of described switch power module, the second feedback end that the second input of described DC/DC transducer is described switch power module, the output of described switching tube Q1 is the control end of described switch power module, the output of described DC/DC transducer is connected with the input of described switching tube Q1, and described divider resistance R2 is connected between the control end and ground of described DC/DC transducer.
In conjunction with the possible implementation of the first of the application's first aspect, in the 5th kind of possible implementation, described power transformation module is high frequency transformer T1, the primary input terminal of described power transformation module is the primary coil of described high frequency transformer T1, and the secondary output end of described power transformation module is the secondary coil of described high frequency transformer T1.
In conjunction with the possible implementation of the first of the application's first aspect, in the 6th kind of possible implementation, also comprise output stage filter circuit, described output stage filter circuit comprises diode D3, electrochemical capacitor C4 and capacitor C 5, the anodic bonding of described diode D3 is to the first output of the secondary output end of described power transformation module, the negative electrode of described diode D3, the first end of the positive pole of described electrochemical capacitor C4 and described capacitor C 5 is connected to the input of described switch element jointly, the second end of the negative pole of described electrochemical capacitor C4 and described capacitor C 5 is connected to the second output of the secondary output end of described power transformation module jointly, the first output of the secondary output end of described power transformation module is connected to the input of described switch element by described diode D3.
In conjunction with the possible implementation of the first of the application's first aspect, in the 7th kind of possible implementation, described feedback isolation module comprises optical coupler U1 and divider resistance R3, described optical coupler U1 comprises light-emitting diode D4 and triode Q2, described divider resistance R3 is connected between the anode of anodal and described light-emitting diode D4 of described light source, the negative electrode of described light-emitting diode D4 is connected with the control end of described current feedback module, the collector electrode of described triode Q2 is connected with the first feedback end of described switch power module, the emitter of described triode Q2 is connected with the second feedback end of described switch power module.
The application's second aspect provides a kind of light fixture, and any providing in the application's first aspect or the several possible execution mode in conjunction with the application's first aspect is provided described light fixture.
Above-mentioned control circuit and light fixture, by a constant-current driven module is set, the stable signal of telecommunication is provided to light source and each module, have improved the stability of described control circuit.And, by a processor is set, make it be connected to the switch element being connected with described light source, for controlling disconnection and the closure of described switch element, with lighting and extinguishing and control light source, can make the control signal of the quick answer processor output of light source, reach the object of Based Intelligent Control light source flash of light, further promote the flash of light conversion efficiency of light source.Further, by bus communication module is set, realize the exchanges data of internal circuit and the extraneous controller of photoflash lamp, stability, high efficiency and the expansion of Based Intelligent Control are further promoted, high stability demand and the high performance demands of aid-to-navigation light are met, guarantee piece electrical efficiency, so above-mentioned control circuit has efficiency height and the low feature of loss.
Accompanying drawing explanation
In order to be illustrated more clearly in the application's technical scheme, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The theory diagram of a kind of control circuit that Fig. 1 provides for the embodiment of the present application;
The module diagram of the constant-current driven module circuit in the control circuit based on shown in Fig. 1 that Fig. 2 provides for the embodiment of the present application;
The schematic diagram of the control circuit that Fig. 3 provides for the embodiment of the present application.
Embodiment
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 clearly and completely described.
Refer to Fig. 1, the theory diagram of a kind of control circuit that Fig. 1 provides for the embodiment of the present application.As shown in Figure 1, the control circuit that the present embodiment provides is for controlling the switch of light fixture light source, to control the break-make of light source, the control circuit that the present embodiment provides comprises: switch element 110, constant-current driven module 120, processor 130 and bus communication module 140 and light source 150.
Wherein, the output 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 ac input end by isolating transformer (not shown), the cathode output end of constant-current driven module 120 is connected to the positive pole of light source 150 by switch element 110, 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, and for obtaining constant direct voltage, the output control terminal of processor 130 is connected to switch element 110.
Constant-current driven module 120 is for providing constant output voltage to light source 150 and each module, and constant-current driven module 120 makes light source 150 be operated in specified constant current state always, guarantees the efficiency of piece electrical, so that control circuit has advantages of that efficiency is high and loss is low.
The control signal that can make the quick answer processor 130 of light source export by set handling device 130, reaches the object that Based Intelligent Control light source 150 glistens, and has further promoted the flash of light conversion efficiency of light source 150.
Particularly, the bus control signal that bus communication module 140 is transmitted for received communication bus network, bus control signal is converted to Transistor-Transistor Logic level control signal, then the Transistor-Transistor Logic level that output bus communication module 140 is changed controls signal to processor 130, so that processor 130 is according to receiving disconnection and the closure of Transistor-Transistor Logic level control signal control connection to the switch element of light source 150, with lighting and extinguishing or the brightness of LED is controlled light source 150.
The control circuit that the present embodiment provides, by a constant-current driven module 120 is set, the stable signal of telecommunication is provided to light source 150 and each module, has improved the stability of control circuit.And, by a processor 130 is set, make it be connected to the switch element being connected with light source 150, for disconnection and the closure of control switch unit, with lighting and extinguishing or the brightness of LED is controlled light source 150, the control signal that can make the quick answer processor 130 of light source export, reaches the object that Based Intelligent Control light source 150 glistens, and has further promoted the flash of light conversion efficiency of light source 150.Further, by bus communication module 140 is set, realize for controlling the control circuit of inside and the exchanges data of extraneous controller that light source 150 glistens, stability, high efficiency and the expansion of Based Intelligent Control are further promoted, high stability demand and the high performance demands of aid-to-navigation light are met, guarantee piece electrical efficiency, so above-mentioned control circuit has efficiency height and the low feature of loss.
Refer to Fig. 2, the module diagram of constant-current driven module 120 circuit in the control circuit based on shown in Fig. 1 that Fig. 2 provides for the embodiment of the present application.Based on the control circuit shown in Fig. 1, the present embodiment further proposes to improve to constant-current driven module 120.As shown in Figure 2; the control circuit that the present embodiment provides comprises switch element 110, constant-current driven module 120, processor 130, bus communication module 140 and light source 150; wherein, constant-current driven module 120 comprises 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, current feedback module 123 comprises a detection resistance.
Wherein, the output 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 the input of constant-current driven module 120, the input of rectification filtering module 121 is connected to civil power ac input end by isolating transformer (not shown), the first output head grounding of rectification filtering module 121.
The first output of the secondary output end of power transformation module 122 is the cathode output end of constant-current driven module 120, the first input end of the primary input terminal of power transformation module 122 is connected to the second output of rectification filtering module 121, press to obtain galvanic current, the first output of the secondary output end of power transformation module 122 is connected to the positive pole of light source 150 by switch element 110.
One end of the detection resistance of current feedback module 123 is the first test side of current feedback module 123, the other end that detects resistance is the second test side of current feedback module 123, the first test side of current feedback module 123 is connected to the second output of the secondary output end of power transformation module 122, the second test side of current feedback module 123 is connected to the negative pole of light source 150, for detection of the current value that flows through light source 150.
The first signal input of feedback isolation module 124 is connected to the positive pole of light source 150, the secondary signal input of feedback isolation module 124 is connected to the signal output part of current feedback module 123, for obtaining the current value that flows through light source 150, by electrical isolation, to convert the detection signal of telecommunication that antijamming capability is strong to.
High voltage protective module 126, for the protection of switch power module 125, wherein, the input of high voltage protective module 126 is connected to the output of rectification filtering module 121, and the output of high voltage protective module 126 is connected to the control end of 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, and for obtaining constant direct voltage, the output control terminal of processor 130 is connected to switch element 110.
Constant-current driven module 120 is for providing constant output voltage to light source 150 and each module, and constant-current driven module 120 makes light source 150 be operated in specified constant current state always, guarantees the efficiency of piece electrical, so that control circuit has advantages of that efficiency is high and loss is low.
The control signal that can make the quick answer processor 130 of light source export by set handling device 130, reaches the object that Based Intelligent Control light source 150 glistens, and has further promoted the flash of light conversion efficiency of light source 150.
Particularly, the bus control signal that bus communication module 140 is transmitted for received communication bus network, bus control signal is converted to Transistor-Transistor Logic level control signal, then the Transistor-Transistor Logic level that output bus communication module 140 is changed controls signal to processor 130, so that processor 130 is according to receiving disconnection and the closure of Transistor-Transistor Logic level control signal control connection to the switch element of light source 150, with lighting and extinguishing or the brightness of LED is controlled light source 150.
In the constant-current driven module 120 providing at the present embodiment, rectification filtering module 121 for by the output voltage rectification of isolating transformer be galvanic current press, thereby power for light source 150 by power transformation module 122.Current feedback module 123 is for obtaining the electric current on light source 150 by detecting resistance, cross the size of the electric current of light source 150 with monitoring stream, and then monitoring situation is fed back to switch power module 125 by feedback isolation module 124, so that the feedback current value that switch power module 125 detects according to the first feedback end of switch power module 125 and the second feedback end, the electric current of the control end of by-pass cock power module 125, by changing duty ratio so that the electric current of constant-current driven module 120 stable outputs.Usually, when the feedback current value receiving when the first feedback end of switch power module 125 and the second feedback end is less than default specified constant current, the output voltage that 125 of switch power modules are controlled power transformation module 122 increases, thereby makes the electric current in light source 150 increase to specified constant current value.When the feedback current value receiving when the first feedback end of switch power module 125 and the second feedback end is greater than default specified constant current, 125 output voltages of controlling power transformation module 122 of switch power module reduce, thereby make the electric current in light source 150 be reduced to specified constant current value.
Particularly, rectification filtering module 121 is that galvanic current is pressed by the secondary output voltage rectification of isolating transformer, and powers to afterwards light source 150 by the conversion of power transformation module 122.Current feedback module 123 is for detection of the electric current in light source 150, and by feedback isolation module 124 by the current feedback of light source 150 to switch power module 125, thereby to realize according to the output voltage size of the feedback current control power transformation module 122 receiving the electric current of controlling in light source 150 be constant current to switch power module 125 always.
In the present embodiment, the constant-current driven module 120 that control circuit provides is by the electric current of current feedback module 123 detection light source 150, and the electric current of detection is sent to switch power module 125 by feedback isolation module 124, the electric current detecting when current feedback module 123 is during lower than specified constant current, the output voltage that switch power module 125 is controlled power transformation module 122 increases, and makes the electric current in light source 150 increase to constant current; The electric current detecting when current feedback module 123 is during higher than specified constant current, and the output voltage that switch power module 125 is controlled power transformation module 122 reduces, and makes the electric current in light source 150 be decreased to constant current.Thereby make light source 150 be operated in specified constant current state, the switch power module 125 wherein adopting can be realized the Efficient Conversion of energy, guarantees piece electrical efficiency always, so above-mentioned control circuit has advantages of that efficiency is high and loss is low.
Refer to Fig. 3, the schematic diagram of the control circuit that Fig. 3 provides for the embodiment of the present application.As shown in Figure 3; the control circuit that the present embodiment provides comprises switch element 110, constant-current driven module 120, processor 130, bus communication module 140 and light source 150; wherein, constant-current driven module 120 comprises rectification filtering module 121, power transformation module 122, current feedback module 123, feedback isolation module 124, switch power module 125, high voltage protective module 126 and output stage filter circuit 127.Wherein, rectification filtering module 121 comprises rectifier bridge D1, electrochemical capacitor C1 and capacitor C 2.High voltage protective module 126 comprises capacitor C 3, resistance R 1 and diode D2.Switch power module 125 comprises DC/DC transducer, switching tube Q1 and divider resistance R2.Power transformation module 122 is high frequency transformer T1, and the primary input terminal of power transformation module 122 is the primary coil of high frequency transformer T1, and the secondary output end of power transformation module 122 is the secondary coil of high frequency transformer T1.Output stage filter circuit 127 comprises diode D3, electrochemical capacitor C4 and capacitor C 5.Feedback isolation module 124 comprises optical coupler U1 and divider resistance R3, and optical coupler U1 comprises light-emitting diode D4 and triode Q2.
Wherein, the annexation of processor 120 and bus communication module 130 with above-mentioned identical with annexation and the operation principle of Fig. 2 to Fig. 1, therefore do not repeat at this, is now done following description to the annexation of each element in constant-current drive circuit with operation principle:
Wherein, the first input end that first and second input of rectifier bridge D1 is rectification filtering module and the second input, the first output that first and second output of rectifier bridge D1 is rectification filtering module and the second output, the first end of the positive pole of electrochemical capacitor C1 and capacitor C 2 is all connected to the second output of rectifier bridge D1, the equal ground connection of the second end of the negative pole of electrochemical capacitor C1 and capacitor C 2.
The first end of the first end of resistance R 1 and capacitor C 3 is all connected to the second output of rectifier bridge D1, and the second end of resistance R 1 and the second end of capacitor C 3 are all connected to the negative electrode of diode D2, and the anodic bonding of diode D2 is to the control end of switch power module 125.
DC/DC transducer comprises power end, control end, first input end, the second input and output; The power end of DC/DC transducer is the power end of switch power module 125, the first input end of DC/DC transducer is the first feedback end of switch power module 125, the second input of DC/DC transducer is the second feedback end of switch power module 125, the output of switching tube Q1 is the control end of switch power module 125, the output of DC/DC transducer is connected with the input of switching tube Q1, and divider resistance R2 is connected between the control end and ground of DC/DC transducer.
The first output of the secondary output end of power transformation module 122 is the cathode output end of constant-current driven module 120, the first input end of the primary input terminal of power transformation module 122 is connected to the second output of rectification filtering module 121, press to obtain galvanic current, the first output of the secondary output end of power transformation module 122 is connected to the positive pole of light source 150 by switch element 110.Wherein, power transformation module 122 is high frequency transformer T1, and the primary input terminal of power transformation module 122 is the primary coil of high frequency transformer T1, and the secondary output end of power transformation module 122 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 is connected to the input of switch element 110 by diode D3.Wherein, the anodic bonding of diode D3 is to the first output of the secondary output end of power transformation module 122, the first end of the negative electrode of diode D3, the positive pole of electrochemical capacitor C4 and capacitor C 5 is connected to the input of switch element 110 jointly, and the second end of the negative pole of electrochemical capacitor C4 and capacitor C 5 is connected to the second output of the secondary output end of power transformation module 122 jointly.
Optical coupler U1 comprises light-emitting diode D4 and triode Q2, divider resistance R3 is connected between the positive pole of light source 150 and the anode of light-emitting diode D4, the negative electrode of light-emitting diode D4 is connected with the control end of current feedback module 123, the collector electrode of triode Q2 is connected with the first feedback end of switch power module 125, and the emitter of triode Q2 is connected with the second feedback end of switch power module 125.
One end of the detection resistance of current feedback module 123 is the first test side of current feedback module 123, the other end that detects resistance is the second test side of current feedback module 123, the first test side of current feedback module 123 is connected to the second output of the secondary output end of power transformation module 122, the second test side of current feedback module 123 is connected to the negative pole of light source 150, for detection of the current value that flows through light source 150.
In the time that switching tube Q1 ends, the output of switching tube Q1 can produce very high induced voltage, and particularly, induced voltage can be up to more than 1000V, and such induction high pressure can make switching tube Q1 punch through damage.Therefore; between the output of switching tube Q1 and the output of rectification filtering module 121, connect after high voltage protective module 126; induction high pressure charges to capacitor C 3 by diode D2; and can discharge by resistance R 1 immediately after capacitor C 3 chargings; thereby absorb induction high pressure, reach the object of protection switch pipe Q1.
Based on above-mentioned all embodiment, 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 passes through electrochemical capacitor C1 and capacitor C 2 filtering after rectifier bridge D1 rectification again, to the direct voltage of power transformation module 122 stable outputs.The pressure drop size that power transformation module 122 becomes light source 150 to need the voltage transformation of reception.It is the specified constant current value of setting that the output voltage of power transformation module especially, 122 makes the operating current of light source 150.
Electric current in the current sense resistor R4 detection light source 150 of current feedback module 123, and by detect current feedback to feedback isolation module 124.Feedback isolation module 124 is converted to light signal by feedback current and converts current signal to again and send to switch power module 125.Switch power module 125 is controlled the output voltage size of power transformation module 122 according to the feedback current size receiving.
DC/DC transducer in switch power module 125 is the energy storage characteristic that utilizes electric capacity, inductance, carry out the action of HF switch by gate-controlled switch (MOSFET etc.), by inner at electric capacity (sense) electrical power storage of input, in the time that switch disconnects, electric energy discharges to load again, energy is provided, and the power of its output or voltage capability and duty ratio (by the ratio in cycle of switch conduction time and whole switch) are relevant.Therefore, DC/DC transducer has the effect of boosting with step-down.The current value detecting by the first feedback end and second feedback end of switch power module 125, the electric current of the control end of by-pass cock power module 125, by changing duty ratio so that the electric current of constant-current driven module 120 stable outputs.
Therefore, the current value feeding back in current feedback module 123 is during higher than specified constant current value, and switch power module 125 is brought into play hypotensive effect, and the output voltage of power transformation module 122 is reduced, thereby the operating current of light source 150 is reduced until specified constant current value.The current value feeding back in current feedback module 123 is during lower than specified constant current value, and switch power module 125 is brought into play boosting, the output voltage of power transformation module 122 is increased, thereby make the operating current of light source 150 be increased to specified constant current value.When the current value feeding back in current feedback module 123 is consistent with specified constant current value, switch power module 125 does not act on power transformation module 122, and the output voltage of power transformation module 122 is constant, makes the operating current of light source 150 constant.In above-mentioned control procedure, can make the operating current of light source 150 always at specified constant current value.
Above-mentioned control circuit, by a constant-current driven module 120 is set, the stable signal of telecommunication is provided to light source 150 and each module, has improved the stability of control circuit.And, by a processor 130 is set, make it be connected to the switch element being connected with light source 150, for disconnection and the closure of control switch unit, with lighting and extinguishing or the brightness of LED is controlled light source 150, the control signal that can make the quick answer processor 130 of light source 150 export, makes LED sequence flash lights reach the object that Based Intelligent Control light source 150 glistens, and has further promoted the flash of light conversion efficiency of light source 150.Further, by bus communication module 140 is set, realize the exchanges data of lamp interior control circuit and extraneous controller, stability, high efficiency and the expansion of Based Intelligent Control are further promoted, high stability demand and the high performance demands of aid-to-navigation light are met, guarantee piece electrical efficiency, so above-mentioned control circuit has efficiency height and the low feature of loss.
Be more than the application's preferred implementation, it should be pointed out that for those skilled in the art, not departing under the prerequisite of the application's principle, can also make some improvements and modifications, these improvements and modifications are also considered as the application's protection range.
Claims (9)
1. a control circuit, for controlling the switch of light fixture light source, to control the break-make of described light source, is characterized in that, described control circuit comprises:
Switch element, the output 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 ac input end by isolating transformer, the cathode output end of described constant-current driven module is connected to the positive pole of described light source by described switch element, 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, and for obtaining constant direct voltage, the output control terminal of described processor is connected to described switch element;
Bus communication module, be connected to the output of outside communication bus network, to receive the bus control signal of described external communication network output, and convert described bus control signal to level controling signal, wherein, described bus communication module is also connected to the input control end of described processor, be used for exporting described level controling signal to described processor, so that described processor is according to controlling described switch element after described level controling signal, thus being connected between light source and described constant-current driven module described in break-make.
2. control circuit as claimed in claim 1, is characterized in that, described constant-current driven module comprises:
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 civil power ac input end by isolating transformer, the first output head grounding of described rectification filtering module;
Power transformation module, the cathode output end that the first output of the secondary output end of described power transformation module is described constant-current driven module, the first input end of the primary input terminal of described power transformation module is connected to the second output of described rectification filtering module, press to obtain galvanic current, the first output of the secondary output end of described power transformation module is connected to the positive pole of described light source by described switch element;
Current feedback module, comprise detection resistance, one end of the detection resistance of described current feedback module is the first test side of described current feedback module, the other end of described detection resistance is the second test side of described current feedback module, the first test side of described current feedback module is connected to the second output of the secondary output end of described power transformation module, the second test side of described current feedback module is connected to the negative pole of described light source, for detection of the current value that flows through described light source;
Feedback isolation module, the first signal input of described feedback isolation module is connected to the positive pole of described light source, the secondary signal input of described feedback isolation module is connected to the signal output part of described current feedback module, for obtaining the current value that flows through described light source, by electrical isolation, to convert the detection signal of telecommunication that antijamming capability is strong to;
Switch power module, the power end of described switch power module is connected to the second output of described rectification filtering module, the first feedback end of described switch power module is connected to the first electrical signal of described feedback isolation module, the second feedback end of described switch power module is connected to the second electrical signal of described feedback isolation module, for obtaining the described antijamming capability strong detection signal of telecommunication of described feedback isolation module through electrical isolation conversion, the control end of described switch power module is connected with the second input of the primary input terminal of described power transformation module, for the strong detection signal of telecommunication of described antijamming capability obtaining according to the first feedback end of described switch power module and the second feedback end, to regulate the electric current of control end of described switch power module, by changing duty ratio so that the electric current of described power transformation module stable output.
3. control circuit according to claim 2, is characterized in that, described rectification filtering module comprises rectifier bridge D1, electrochemical capacitor C1 and capacitor C 2; First and second input of described rectifier bridge D1 is respectively first input end and second input of described rectification filtering module, first and second output of described rectifier bridge D1 is respectively the first output and second output of described rectification filtering module, the first end of the positive pole of described electrochemical capacitor C1 and described capacitor C 2 is all connected to the second output of described rectifier bridge D1, the equal ground connection of the second end of the negative pole of described electrochemical capacitor C1 and described capacitor C 2.
4. control circuit according to claim 3, it is characterized in that, described constant-current driven module also comprises high voltage protective module, the input of described high voltage protective module is connected to the second output of described rectification filtering module, the output of described high voltage protective module is connected to the second input of the primary input terminal of described power transformation module, be used for preventing from puncturing described light source, described high voltage protective module comprises capacitor C 3, resistance R 1 and diode D2, the first end of the first end of described resistance R 1 and described capacitor C 3 is all connected to the second output of described rectifier bridge D1, the second end of described resistance R 1 and the second end of described capacitor C 3 are all connected to the negative electrode of described diode D2, the anodic bonding of described diode D2 is to the control end of described switch power module.
5. according to the control circuit described in claim 3 or 4, it is characterized in that, described switch power module comprises DC/DC transducer, switching tube Q1 and divider resistance R2, and described DC/DC transducer comprises power end, control end, first input end, the second input and output; The power end of described DC/DC transducer is the power end of described switch power module, the first input end of described DC/DC transducer is the first feedback end of described switch power module, the second feedback end that the second input of described DC/DC transducer is described switch power module, the output of described switching tube Q1 is the control end of described switch power module, the output of described DC/DC transducer is connected with the input of described switching tube Q1, and described divider resistance R2 is connected between the control end and ground of described DC/DC transducer.
6. control circuit according to claim 2, it is characterized in that, described power transformation module is high frequency transformer T1, and the primary input terminal of described power transformation module is the primary coil of described high frequency transformer T1, and the secondary output end of described power transformation module is the secondary coil of described high frequency transformer T1.
7. control circuit according to claim 2, it is characterized in that, also comprise output stage filter circuit, described output stage filter circuit comprises diode D3, electrochemical capacitor C4 and capacitor C 5, the anodic bonding of described diode D3 is to the first output of the secondary output end of described power transformation module, the negative electrode of described diode D3, the first end of the positive pole of described electrochemical capacitor C4 and described capacitor C 5 is connected to the input of described switch element jointly, the second end of the negative pole of described electrochemical capacitor C4 and described capacitor C 5 is connected to the second output of the secondary output end of described power transformation module jointly, the first output of the secondary output end of described power transformation module is connected to the input of described switch element by described diode D3.
8. control circuit according to claim 2, it is characterized in that, described feedback isolation module comprises optical coupler U1 and divider resistance R3, described optical coupler U1 comprises light-emitting diode D4 and triode Q2, described divider resistance R3 is connected between the anode of anodal and described light-emitting diode D4 of described light source, the negative electrode of described light-emitting diode D4 is connected with the control end of described current feedback module, the collector electrode of described triode Q2 is connected with the first feedback end of described switch power module, the emitter of described triode Q2 is connected with the second feedback end of described switch power module.
9. a light fixture, is characterized in that, described light fixture comprises the control circuit as described in as wherein arbitrary in claim 1 to 8.
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| CN103857097B (en) | 2016-12-21 |
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