CN104427698A - Control circuit - Google Patents

Control circuit Download PDF

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Publication number
CN104427698A
CN104427698A CN201310390744.4A CN201310390744A CN104427698A CN 104427698 A CN104427698 A CN 104427698A CN 201310390744 A CN201310390744 A CN 201310390744A CN 104427698 A CN104427698 A CN 104427698A
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resistance
termination
diode
connects
electric capacity
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CN201310390744.4A
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CN104427698B (en
Inventor
周明杰
王现中
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Abstract

The embodiment of the invention discloses a control circuit. The control circuit comprises a charging module, a switching module, a driving module and an adjusting module, wherein the charging module is connected with the anode of a power supply and is used for adjusting received supply voltage to charge a battery; the switching module is connected with the charging module and is used for switching to battery power in a power failure and switching to power supply when the power supply is normal; the driving module is connected with the switching module and is used for driving a light-emitting diode to work; the adjusting module is connected with the switching module and the driving module and is used for adjusting the brightness of a lamp according to the power supply state of the light-emitting diode. Through the adoption of the control circuit, the output power of an emergency lamp can be automatically controlled, and the using time length of the lamp in emergency use is prolonged.

Description

A kind of control circuit
Technical field
The present invention relates to electronic applications, particularly relate to a kind of control circuit.
Background technology
Along with the development of illuminating industry, need in a lot of place to use emergency light, so that light fixture emergency light still can use powered battery when civil power power-off, for the live and work of people brings convenience, reduce the loss that power-off brings, reduce the danger that power-off can not look thing.Wherein, more common is continuation emergency light, and it by mains-supplied, is lighted light fixture when civil power is normal, and charges a battery simultaneously; When mains-supplied is abnormal, transfers storage battery power supply to, light light fixture.Because lamp power is constant, so civil power is lighted with emergent to light power identical, the power output when emergent lighting is comparatively large, makes the light fixture crash time short, cannot meet escape or emergency repair time requirement.If reduce the overall power of light fixture, during mains-supplied, lamp brightness is not enough, will affect normal life and the work of user.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of control circuit.Automatically can control the power output of emergency light, promote the use duration of light fixture when Emergency use.
In order to solve the problems of the technologies described above, embodiments provide a kind of control circuit, comprising:
Charging module, is connected with power supply, for adjusting the supply voltage received, is battery charging;
Handover module, is connected with described charging module, for when power failure, switches to powered battery, when power supply is normal, switches to Power supply;
Driver module, is connected with described handover module, for driving Light-Emitting Diode work;
Adjustment module, is connected with described handover module and described driver module, for regulating the brightness of light fixture according to the power supply state of described Light-Emitting Diode,
Wherein, described handover module comprises the 7th diode, 8th diode, 9th diode, 8th electric capacity and relay, the positive pole of described 7th diode connects power supply, negative pole connects the second end of described relay switch, the positive pole of battery described in first termination of described relay switch, the negative pole of the 8th diode described in first termination of described relay coil, second end ground connection, the positive pole of described 8th diode connects the positive pole of described 8th electric capacity, the minus earth of described 8th electric capacity, the positive pole of described 8th electric capacity connects the positive pole of described 7th diode, the positive pole of described 9th diode connects the second end of described relay coil, negative pole connects the first end of described relay coil, adjustment module described in 3rd termination of described relay switch,
Described adjustment module comprises the 12 diode, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, 18 resistance, comparator and the 3rd switching tube, the power input of described comparator connects the 3rd end of described relay switch, earth terminal ground connection, in-phase input end connects the negative pole of described Light-Emitting Diode, reverse input end connects the first end of described 16 resistance, second end ground connection of described 16 resistance, the positive pole of the 12 diode described in the output termination of described comparator, the negative pole of described 12 diode connects the second input of described charging module, the negative pole of the 12 diode described in first termination of described 13 resistance, the inverting input of comparator described in second termination of described 13 resistance, the in-phase input end of comparator described in first termination of described 14 resistance, second end ground connection of described 14 resistance, the in-phase input end of comparator described in first termination of described 15 resistance, the drain electrode of the 3rd switching tube described in second termination of described 15 resistance, the source ground of described 3rd switching tube, grid connects the first end of described 18 resistance, the common node of the 8th diode and described 9th diode cathode described in second termination of described 18 resistance, the common node of the 3rd switching tube grid and described 18 resistance first ends described in first termination of described 17 resistance, second end ground connection of described 17 resistance.
Wherein, described charging module comprises DC/DC transducer and peripheral circuit thereof, described peripheral circuit comprises the first triode, first resistance, first diode, first inductance, second resistance, second triode, 3rd resistance, first adjustable resistance, first electric capacity, second diode, 3rd electric capacity, 4th resistance, 5th resistance and the 4th electric capacity, the power input of described DC/DC transducer is the first input end of described charging module, the feedback pin of described DC/DC transducer is the second input of described charging module, the output of the just very described charging module of described battery, the collector terminal of described DC/DC converter inside switching tube connects the base stage of described first triode, the emitter of described first triode connects the first end of described 5th resistance, positive source described in second termination of described 5th resistance, the base stage of the first triode described in described first resistance one termination, the first end of the 5th resistance described in another termination, the negative pole of described first diode connects the base stage of described first triode, positive pole connects the collector electrode of described first triode, the collector electrode of the first triode described in one termination of described first inductance, the first end of another termination second resistance, the emitter exit of DC/DC converter inside switching tube described in second termination of described second resistance, the emitter of the second triode described in first termination of described second resistance, the collector electrode of described second triode connects the first end of the first adjustable resistance, base stage connects the common node of described 3rd resistance first end and described first adjustable resistance second end, the emitter of the second triode described in second termination of described 3rd resistance, the positive pole of battery described in first termination of described first adjustable resistance, the terminals of DC/DC converter inside timing capacitor described in first termination of described first electric capacity, second end ground connection, the earth terminal ground connection of described DC/DC transducer, the plus earth of described second diode, negative pole connects the common node of described first diode cathode and described first inductance first end, the first end ground connection of described 3rd electric capacity, second end of the second resistance described in the second termination, the first end of output voltage sampling termination the 4th resistance of described DC/DC transducer, second end ground connection of described 4th resistance, the collector electrode of the second triode described in first termination, the power input of described DC/DC transducer connects positive source, the first end of the 5th resistance described in the load peak current sampling termination of described DC/DC transducer, the positive pole of the 4th electric capacity described in second termination of described 5th resistance, the minus earth of described 4th electric capacity, the collector terminal of described DC/DC converter inside driving tube is vacant.
Wherein, described charging module also comprises the 5th diode and the 6th diode, the positive pole of described 5th diode connects positive source, negative pole connects the power input of described DC/DC transducer, the positive pole of described 6th diode connects the first end of described first adjustable resistance, and negative pole connects the positive pole of described battery.
Wherein, described driver module comprises switching regulator and peripheral circuit thereof, and described peripheral circuit comprises the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the tenth diode, the 11 diode, the 3rd inductance.Second protective tube and second switch pipe, the positive pole of described 9th electric capacity connects the 3rd end of described relay switch, minus earth, the current detecting input pin of described switching regulator connects the first end of described tenth resistance, second end ground connection of described tenth resistance, the compensation pin of described switching regulator connects the first end of described 7th resistance, the first end of the tenth electric capacity described in second termination of described 7th resistance, second end ground connection of described tenth electric capacity, the feedback pin of described switching regulator connects the negative pole of the 12 diode in described adjustment module, analogue ground pin ground connection, power ground pin ground connection, pin is driven to connect the first end of described 9th resistance, the first end of the tenth resistance described in second termination of described 9th resistance, the frequency adjustment of described switching regulator and shutdown pin connect the first end of described 8th resistance, second end ground connection of described 8th resistance, the power input pin of described switching regulator connects the first end of described 3rd inductance, the positive pole of the 11 diode described in second termination of described 3rd inductance, the negative pole of described 11 diode connects the first end of described 11 electric capacity, second end ground connection of described 11 electric capacity, the positive pole of described 12 electric capacity connects the first end of described 11 electric capacity, minus earth, the positive pole of the 12 electric capacity described in first termination of described 11 resistance, the first end of the 12 resistance described in second termination of described 11 resistance, second end ground connection of described 12 resistance, the first end of the 11 resistance described in first termination of described second protective tube, the positive pole of Light-Emitting Diode described in second termination of described second protective tube, the negative pole of described Light-Emitting Diode connects the in-phase input end of comparator in described adjustment module, the positive pole of described tenth diode connects the common node of described 12 resistance first end and described 11 resistance second end, negative pole connects the feedback pin of described switch voltage-stabilizing pipe.
Wherein, described circuit also comprises:
Rectification filtering module, being connected with the positive pole of power supply and negative pole, for carrying out rectifying and wave-filtering process to supply voltage, alternating voltage being converted to direct voltage output;
Voltage changing module, is connected with described rectification filtering module, and the value for the direct voltage exported by described rectification filtering module is adjusted to the value of circuit voltage.
Wherein, described rectification filtering module comprises thermistor, first protective tube, low pass filter, rectifier bridge stack and filter capacitor, described first protective tube first end is connected with positive source, described first protective tube second end is connected with the first end of described thermistor, second termination power negative pole of described thermistor, second end of described low pass filter is connected with the first end of thermistor, the first end of described low pass filter is connected with the second end of described thermistor, 3rd end of described low pass filter is connected with the second input of described rectifier bridge stack, 4th end of described low pass filter is connected with the first input end of described rectifier bridge stack, first of described rectifier bridge stack exports the positive pole of filter capacitor described in termination, second output head grounding, the positive pole of described filter capacitor connects described voltage changing module, minus earth.
Wherein, described voltage changing module comprises the 5th electric capacity, 6th electric capacity, 7th electric capacity, 6th resistance, second inductance, first switching tube and transformer, the first end of filter capacitor described in first termination of described 5th electric capacity, described 6th resistance and described 5th Capacitance parallel connection, the first input end of transformer described in first termination of described 5th electric capacity, the negative pole of the 3rd diode described in second termination of described 5th electric capacity, the positive pole of described 3rd diode connects the second input of described transformer, the source electrode of described first switching tube connects the positive pole of described 3rd diode, grounded drain, grid meets PWM, first of described transformer exports the positive pole of the 4th diode described in termination, second output head grounding, the negative pole of described 4th diode connects the first end of described second inductance, the positive pole of the 6th electric capacity described in first termination of described second inductance, the minus earth of described 6th electric capacity, the positive pole of the 7th electric capacity described in second termination of described second inductance, the minus earth of described 7th electric capacity.
Wherein, described first triode and the second triode are PNP type triode.
Wherein, the model of described DC/DC transducer is MC34063.
Wherein, the model of described DC/DC transducer is MC34063.
Implement the embodiment of the present invention, there is following beneficial effect:
When civil power is normal, charging module is battery charging, switching to battery when municipal power failure by handover module is that driver module is powered, driving light fixture works, and provide larger current to power when civil power is normal by adjustment module to provide small electric stream to power when municipal power failure, thus realize the power output that automatically can control emergency light, the use duration of light fixture is promoted, the problem causing more greatly the emergency service time shorter because of electric current and power when avoiding emergency light powered battery when Emergency use.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the connection diagram of the first embodiment of control circuit of the present invention;
Fig. 2 is the circuit diagram of rectification filtering module in the second embodiment of control circuit of the present invention;
Fig. 3 is the circuit diagram of voltage changing module in the second embodiment of control circuit of the present invention;
Fig. 4 is the circuit diagram of charging module in the second embodiment of control circuit of the present invention;
Fig. 5 is the circuit diagram of handover module in the second embodiment of control circuit of the present invention;
Fig. 6 is the circuit diagram of driver module in the second embodiment of control circuit of the present invention;
Fig. 7 is the circuit diagram of adjustment module in the second embodiment of control circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, be the connection diagram of the first embodiment of control circuit of the present invention, in the present embodiment, described circuit comprises: charging module 1, handover module 2, driver module 3, adjustment module 4.
Charging module 1, is connected with positive source, for adjusting the supply voltage received, is battery charging;
Handover module 2, is connected with described charging module 1, for when power failure, switches to powered battery, when power supply is normal, switches to Power supply;
Driver module 3, is connected with described handover module 2, for driving Light-Emitting Diode work;
Adjustment module 4, is connected with described handover module 2 and described driver module 3, for regulating the brightness of light fixture according to the power supply state of described Light-Emitting Diode.
Wherein, described handover module comprises the 7th diode, 8th diode, 9th diode, 8th electric capacity and relay, the positive pole of described 7th diode connects positive source, negative pole connects the second end of described relay switch, the positive pole of battery described in first termination of described relay switch, the negative pole of the 8th diode described in first termination of described relay coil, second end ground connection, the positive pole of described 8th diode connects the positive pole of described 8th electric capacity, the minus earth of described 8th electric capacity, the positive pole of described 8th electric capacity connects the positive pole of described 7th diode, the positive pole of described 9th diode connects the second end of described relay coil, negative pole connects the first end of described relay coil, adjustment module described in 3rd termination of described relay switch,
Described adjustment module comprises the 12 diode, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, 18 resistance, comparator and the 3rd switching tube, the power input of described comparator connects the 3rd end of described relay switch, earth terminal ground connection, in-phase input end connects the negative pole of described Light-Emitting Diode, reverse input end connects the first end of described 16 resistance, second end ground connection of described 16 resistance, the positive pole of the 12 diode described in the output termination of described comparator, the negative pole of described 12 diode connects the second input of described charging module, the negative pole of the 12 diode described in first termination of described 13 resistance, the inverting input of comparator described in second termination of described 13 resistance, the in-phase input end of comparator described in first termination of described 14 resistance, second end ground connection of described 14 resistance, the in-phase input end of comparator described in first termination of described 15 resistance, the drain electrode of the 3rd switching tube described in second termination of described 15 resistance, the source ground of described 3rd switching tube, grid connects the first end of described 18 resistance, the common node of the 8th diode and described 9th diode cathode described in second termination of described 18 resistance, the common node of the 3rd switching tube grid and described 18 resistance first ends described in first termination of described 17 resistance, second end ground connection of described 17 resistance.
When civil power is normal, charging module is battery charging, switching to battery when municipal power failure by handover module is that driver module is powered, driving light fixture works, and provide larger current to power when civil power is normal by adjustment module to provide small electric stream to power when municipal power failure, thus realize the power output that automatically can control emergency light, the use duration of light fixture is promoted, the problem causing more greatly the emergency service time shorter because of electric current and power when avoiding emergency light powered battery when Emergency use.
Please with reference to Fig. 2-7, be respectively the circuit diagram of rectification filtering module, voltage changing module, charging module, handover module, driver module, adjustment module in the second embodiment of control circuit of the present invention.The mark of A1, A2, A3, A4, A5, A6 is respectively the link position mark between modules in the various figures.
In the present embodiment, described circuit comprises: rectification filtering module, voltage changing module, charging module, handover module, driver module, adjustment module.
Rectification filtering module, being connected with the positive pole of power supply and negative pole, for carrying out rectifying and wave-filtering process to supply voltage, alternating voltage being converted to direct voltage output;
Voltage changing module, is connected with described rectification filtering module, and the value for the direct voltage exported by described rectification filtering module 1 is adjusted to the value of circuit voltage;
Particularly, described rectification filtering module comprises thermistor RT, first protective tube F1, low pass filter LF1, rectifier bridge stack BD and filter capacitor C, described first protective tube F1 first end is connected with positive source, second end of described first protective tube F1 is connected with the first end of described thermistor RT, the second termination power negative pole of described first thermistor RT, second end of described low pass filter LF1 is connected with the first end of described thermistor RT, the first end of described low pass filter LF1 is connected with second end of described thermistor RT, 3rd end of described low pass filter LF1 is connected with second input of described rectifier bridge stack BD, 4th end of described low pass filter LF is connected with the first input end of described rectifier bridge stack BD, first of described rectifier bridge stack BD exports the positive pole of filter capacitor C described in termination, second output head grounding, the positive pole of described filter capacitor C connects described voltage changing module, minus earth.
Described charging module comprises DC/DC transducer U1 and peripheral circuit thereof, described peripheral circuit comprises the first triode Q1, first resistance R1, first diode D1, first inductance L 1, second resistance R2, second triode D2, 3rd resistance R3, first adjustable resistance RP1, first electric capacity C1, second diode D2, 3rd electric capacity C3, 4th resistance R4, 5th resistance R5 and the 4th electric capacity C4, the power input of described DC/DC transducer U1 is the first input end of described charging module, the feedback pin of described DC/DC transducer U1 is the second input of described charging module, the output of the just very described charging module of described battery BT, the collector terminal of described DC/DC transducer U1 internal switch pipe connects the base stage of described first triode Q1, the emitter of described first triode Q1 connects the first end of described 5th resistance R5, namely the second end positive source of described 5th resistance R5 connects the voltage output end of described voltage changing module, the base stage of the first triode described in described first resistance R1 mono-termination, the first end of the 5th resistance described in another termination, the negative pole of described first diode D1 connects the base stage of described first triode Q1, positive pole connects the collector electrode of described first triode Q1, the collector electrode of the first triode Q1 described in one termination of described first inductance L 1, the first end of another termination second resistance R2, the emitter exit of DC/DC transducer U1 internal switch pipe described in second termination of described second resistance R2, the emitter of the second triode Q2 described in first termination of described second resistance R2, the collector electrode of described second triode Q2 connects the first end of the first adjustable resistance RP1, base stage connects the common node of described 3rd resistance R3 first end and described first adjustable resistance RP1 second end, the emitter of the second triode Q2 described in second termination of described 3rd resistance R3, the positive pole of battery BT described in first termination of described first adjustable resistance RP1, the terminals of DC/DC transducer U1 internal timing electric capacity described in first termination of described first electric capacity C1, second end ground connection, the earth terminal ground connection of described DC/DC transducer U1, the plus earth of described second diode Q2, negative pole connects the common node of described first diode D1 positive pole and described first inductance L 1 first end, the first end ground connection of described 3rd electric capacity C3, second end of the second resistance R2 described in second termination, the first end of output voltage sampling termination the 4th resistance R4 of described DC/DC transducer U1, the second end ground connection of described 4th resistance R4, the collector electrode of the second triode Q2 described in first termination of described 4th resistance, the power input of described DC/DC transducer U1 connects the voltage output end of positive source and described voltage changing module, the first end of the 5th resistance R5 described in the load peak current sampling termination of described DC/DC transducer U1, the positive pole of the 4th electric capacity C4 described in second termination of described 5th resistance R5, the minus earth of described 4th electric capacity C4, the collector terminal of described DC/DC transducer U1 internal drive pipe is vacant.
Preferably, described charging module also comprises the 5th diode D5 and the 6th diode D6, the positive pole of described 5th diode D5 connects the voltage output end of positive source and described voltage changing module, negative pole connects the power input of described DC/DC transducer U1, the positive pole of described 6th diode D6 connects the first end of described first adjustable resistance RP1, and negative pole connects the positive pole of described battery BT.
Described voltage changing module comprises the 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, 6th resistance R6, second inductance L 2, first switching tube Q3 and transformer T1, the first end of filter capacitor described in first termination of described 5th electric capacity C5, described 6th resistance R6 is in parallel with described 5th electric capacity C5, the first input end of transformer T1 described in first termination of described 5th electric capacity C5, the negative pole of the 3rd diode described in second termination of described 5th electric capacity C5, the positive pole of described 3rd diode connects second input of described transformer T1, the source electrode of described first switching tube Q3 connects the positive pole of described 3rd diode, grounded drain, grid meets PWM, first of described transformer T1 exports the positive pole of the 4th diode described in termination, second output head grounding, the negative pole of described 4th diode connects the first end of described second inductance L 2, the positive pole of the 6th electric capacity C6 described in first termination of described second inductance L 2, the minus earth of described 6th electric capacity C6, the positive pole of the 7th electric capacity C7 described in second termination of described second inductance L 2, the minus earth of described 7th electric capacity C7.
Described handover module comprises the 7th diode D7, 8th diode D8, 9th diode D9, 8th electric capacity C8 and relay K 1, the positive pole of described 7th diode D7 connects described second end of the second inductance L 2 and the voltage output end of described voltage changing module, negative pole connects the second end of described relay K 1 switch, the positive pole of battery described in first termination of described relay K 1 switch, the negative pole of the 8th diode D8 described in first termination of described relay K 1 coil, second end ground connection, the positive pole of described 8th diode D8 connects the positive pole of described 8th electric capacity C8, the minus earth of described 8th electric capacity C8, the positive pole of described 8th electric capacity C8 connects the positive pole of described 7th diode D7, the positive pole of described 9th diode D9 connects the second end of described relay K 1 coil, negative pole connects the first end of described relay K 1 coil, adjustment module described in 3rd termination of described relay K 1 switch.
Described driver module comprises Light-Emitting Diode LED, switching regulator U2 and peripheral circuit thereof, and described peripheral circuit comprises the 9th electric capacity C9, the tenth electric capacity C10, the 11 electric capacity C11, the 12 electric capacity C12, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the tenth diode D10, the 11 diode D11, the 3rd inductance L 3.Second protective tube F2 and second switch pipe Q4, the positive pole of described 9th electric capacity C9 connects the 3rd end of described relay K 1 switch, minus earth, the current detecting input pin of described switching regulator U2 connects the first end of described tenth resistance R10, the second end ground connection of described tenth resistance R10, the compensation pin of described switching regulator U2 connects the first end of described 7th resistance R7, the first end of the tenth electric capacity C10 described in second termination of described 7th resistance R7, the second end ground connection of described tenth electric capacity C10, the feedback pin of described switching regulator U2 connects the negative pole of the 12 diode D12 in described adjustment module, analogue ground pin ground connection, power ground pin ground connection, pin is driven to connect the first end of described 9th resistance R9, the first end of the tenth resistance R10 described in second termination of described 9th resistance R9, the frequency adjustment of described switching regulator U2 and shutdown pin connect the first end of described 8th resistance R8, the second end ground connection of described 8th resistance R8, the power input pin of described switching regulator U2 connects the first end of described 3rd inductance L 3, the positive pole of the 11 diode D11 described in second termination of described 3rd inductance L 3, the negative pole of described 11 diode D11 connects the first end of described 11 electric capacity C11, the second end ground connection of described 11 electric capacity C11, the positive pole of described 12 electric capacity C12 connects the first end of described 11 electric capacity C11, minus earth, the positive pole of the 12 electric capacity C12 described in first termination of described 11 resistance R11, the first end of the 12 resistance R12 described in second termination of described 11 resistance R11, the second end ground connection of described 12 resistance R12, the first end of the 11 resistance R11 described in first termination of described second protective tube F2, the positive pole of Light-Emitting Diode LED described in second termination of described second protective tube F2, the negative pole of described Light-Emitting Diode LED connects the in-phase input end of comparator U3 in described adjustment module, the positive pole of described tenth diode D10 connects the common node of described 12 resistance R12 first end and described 11 resistance R11 second end, negative pole connects the feedback pin of described switch voltage-stabilizing pipe.
Described adjustment module comprises the 12 diode D12, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, 18 resistance R18, comparator U3 and the 3rd switching tube Q5, the power input of described comparator U3 connects the 3rd end of described relay K 1 switch, earth terminal ground connection, in-phase input end connects the negative pole of described Light-Emitting Diode LED, reverse input end connects the first end of described 16 resistance R16, the second end ground connection of described 16 resistance R16, the positive pole of the 12 diode D12 described in the output termination of described comparator U3, the negative pole of described 12 diode D12 connects the second input of charging module and the feedback pin of described switch voltage-stabilizing pipe U2, the negative pole of the 12 diode D12 described in first termination of described 13 resistance R13, the inverting input of comparator U3 described in second termination of described 13 resistance R13, the in-phase input end of comparator U3 described in first termination of described 14 resistance R14, the second end ground connection of described 14 resistance R14, the in-phase input end of comparator U3 described in first termination of described 15 resistance R15, the drain electrode of the 3rd switching tube Q5 described in second termination of described 15 resistance R15, the source ground of described 3rd switching tube Q5, grid connects the first end of described 18 resistance R18, the common node of the 8th diode D8 described in second termination of described 18 resistance R18 and described 9th diode D9 negative pole, the common node of the 3rd switching tube Q5 grid and described 18 resistance first ends described in first termination of described 17 resistance R17, the second end ground connection of described 17 resistance R17.
Described first triode and the second triode are PNP type triode.
The model of described DC/DC transducer U1 is MC34063.
The model of described switching regulator U2 is LM3478.
The operation principle of the present embodiment control circuit is as follows:
After civil power powers on, each element of circuit enters operating state, and civil power, through rectifying and wave-filtering, forms low-voltage DC V+ after transformation process.V+ is divided into two-way, and charging module of leading up to charges the battery, and handover module of leading up to makes relay switch throw in b point, powered to driver module by main electric V+, light light fixture, now, Q5 conducting in adjustment module, R14, R15 are parallel in current detection circuit, and resistance is less, and in-phase input end i.e. the 5th pin voltage of comparator U3 is lower, output output low level, feed back to the switching regulator U1 in driver module, make its output be big current, the LED of light fixture is in floodlighting state.When after civil power power-off, V+ loss of voltage, handover module makes relay switch throw in a point, powered to driver module by battery BT, light light fixture, now, Q5 not conducting in adjustment module, only have R14 to be in current detection circuit, resistance is larger, the 5th pin voltage of comparator U3 is higher, output exports high level, feeds back to the switching regulator U1 in driver module, makes its output be small area analysis, the LED of light fixture is in low light illuminant state, thus extends the light fixture emergency lighting time.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment identical similar part mutually see.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
By the description of above-described embodiment, the present invention has the following advantages:
When civil power is normal, charging module is battery charging, switching to battery when municipal power failure by handover module is that driver module is powered, driving light fixture works, and provide larger current to power when civil power is normal by adjustment module to provide small electric stream to power when municipal power failure, thus realize the power output that automatically can control emergency light, the use duration of light fixture is promoted, the problem causing more greatly the emergency service time shorter because of electric current and power when avoiding emergency light powered battery when Emergency use.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory is called for short ROM) or random store-memory body (Random Access Memory is called for short RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.

Claims (10)

1. a control circuit, is characterized in that, comprising:
Charging module, is connected with positive source, for adjusting the supply voltage received, is battery charging;
Handover module, is connected with described charging module, for when power failure, switches to powered battery, when power supply is normal, switches to Power supply;
Driver module, is connected with described handover module, for driving Light-Emitting Diode work;
Adjustment module, is connected with described handover module and described driver module, for regulating the brightness of light fixture according to the power supply state of described Light-Emitting Diode,
Wherein, described handover module comprises the 7th diode, 8th diode, 9th diode, 8th electric capacity and relay, the positive pole of described 7th diode connects positive source, negative pole connects the second end of described relay switch, the positive pole of battery described in first termination of described relay switch, the negative pole of the 8th diode described in first termination of described relay coil, second end ground connection, the positive pole of described 8th diode connects the positive pole of described 8th electric capacity, the minus earth of described 8th electric capacity, the positive pole of described 8th electric capacity connects the positive pole of described 7th diode, the positive pole of described 9th diode connects the second end of described relay coil, negative pole connects the first end of described relay coil, adjustment module described in 3rd termination of described relay switch,
Described adjustment module comprises the 12 diode, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, 18 resistance, comparator and the 3rd switching tube, the power input of described comparator connects the 3rd end of described relay switch, earth terminal ground connection, in-phase input end connects the negative pole of described Light-Emitting Diode, reverse input end connects the first end of described 16 resistance, second end ground connection of described 16 resistance, the positive pole of the 12 diode described in the output termination of described comparator, the negative pole of described 12 diode connects the second input of described charging module, the negative pole of the 12 diode described in first termination of described 13 resistance, the inverting input of comparator described in second termination of described 13 resistance, the in-phase input end of comparator described in first termination of described 14 resistance, second end ground connection of described 14 resistance, the in-phase input end of comparator described in first termination of described 15 resistance, the drain electrode of the 3rd switching tube described in second termination of described 15 resistance, the source ground of described 3rd switching tube, grid connects the first end of described 18 resistance, the common node of the 8th diode and described 9th diode cathode described in second termination of described 18 resistance, the common node of the 3rd switching tube grid and described 18 resistance first ends described in first termination of described 17 resistance, second end ground connection of described 17 resistance.
2. circuit as claimed in claim 1, it is characterized in that, described charging module comprises DC/DC transducer and peripheral circuit thereof, described peripheral circuit comprises the first triode, first resistance, first diode, first inductance, second resistance, second triode, 3rd resistance, first adjustable resistance, first electric capacity, second diode, 3rd electric capacity, 4th resistance, 5th resistance and the 4th electric capacity, the power input of described DC/DC transducer is the first input end of described charging module, the feedback pin of described DC/DC transducer is the second input of described charging module, the output of the just very described charging module of described battery, the collector terminal of described DC/DC converter inside switching tube connects the base stage of described first triode, the emitter of described first triode connects the first end of described 5th resistance, positive source described in second termination of described 5th resistance, the base stage of the first triode described in described first resistance one termination, the first end of the 5th resistance described in another termination, the negative pole of described first diode connects the base stage of described first triode, positive pole connects the collector electrode of described first triode, the collector electrode of the first triode described in one termination of described first inductance, the first end of another termination second resistance, the emitter exit of DC/DC converter inside switching tube described in second termination of described second resistance, the emitter of the second triode described in first termination of described second resistance, the collector electrode of described second triode connects the first end of the first adjustable resistance, base stage connects the common node of described 3rd resistance first end and described first adjustable resistance second end, the emitter of the second triode described in second termination of described 3rd resistance, the positive pole of battery described in first termination of described first adjustable resistance, the terminals of DC/DC converter inside timing capacitor described in first termination of described first electric capacity, second end ground connection, the earth terminal ground connection of described DC/DC transducer, the plus earth of described second diode, negative pole connects the common node of described first diode cathode and described first inductance first end, the first end ground connection of described 3rd electric capacity, second end of the second resistance described in the second termination, the first end of output voltage sampling termination the 4th resistance of described DC/DC transducer, second end ground connection of described 4th resistance, the collector electrode of the second triode described in first termination, the power input of described DC/DC transducer connects positive source, the first end of the 5th resistance described in the load peak current sampling termination of described DC/DC transducer, the positive pole of the 4th electric capacity described in second termination of described 5th resistance, the minus earth of described 4th electric capacity, the collector terminal of described DC/DC converter inside driving tube is vacant.
3. circuit as claimed in claim 2, it is characterized in that, described charging module also comprises the 5th diode and the 6th diode, the positive pole of described 5th diode connects positive source, negative pole connects the power input of described DC/DC transducer, the positive pole of described 6th diode connects the first end of described first adjustable resistance, and negative pole connects the positive pole of described battery.
4. circuit as claimed in claim 1, it is characterized in that, described driver module comprises switching regulator and peripheral circuit thereof, and described peripheral circuit comprises the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the tenth diode, the 11 diode, the 3rd inductance.Second protective tube and second switch pipe, the positive pole of described 9th electric capacity connects the 3rd end of described relay switch, minus earth, the current detecting input pin of described switching regulator connects the first end of described tenth resistance, second end ground connection of described tenth resistance, the compensation pin of described switching regulator connects the first end of described 7th resistance, the first end of the tenth electric capacity described in second termination of described 7th resistance, second end ground connection of described tenth electric capacity, the feedback pin of described switching regulator connects the negative pole of the 12 diode in described adjustment module, analogue ground pin ground connection, power ground pin ground connection, pin is driven to connect the first end of described 9th resistance, the first end of the tenth resistance described in second termination of described 9th resistance, the frequency adjustment of described switching regulator and shutdown pin connect the first end of described 8th resistance, second end ground connection of described 8th resistance, the power input pin of described switching regulator connects the first end of described 3rd inductance, the positive pole of the 11 diode described in second termination of described 3rd inductance, the negative pole of described 11 diode connects the first end of described 11 electric capacity, second end ground connection of described 11 electric capacity, the positive pole of described 12 electric capacity connects the first end of described 11 electric capacity, minus earth, the positive pole of the 12 electric capacity described in first termination of described 11 resistance, the first end of the 12 resistance described in second termination of described 11 resistance, second end ground connection of described 12 resistance, the first end of the 11 resistance described in first termination of described second protective tube, the positive pole of Light-Emitting Diode described in second termination of described second protective tube, the negative pole of described Light-Emitting Diode connects the in-phase input end of comparator in described adjustment module, the positive pole of described tenth diode connects the common node of described 12 resistance first end and described 11 resistance second end, negative pole connects the feedback pin of described switch voltage-stabilizing pipe.
5. circuit as claimed in claim 1, it is characterized in that, described circuit also comprises:
Rectification filtering module, being connected with the positive pole of power supply and negative pole, for carrying out rectifying and wave-filtering process to supply voltage, alternating voltage being converted to direct voltage output;
Voltage changing module, is connected with described rectification filtering module, and the value for the direct voltage exported by described rectification filtering module is adjusted to the value of circuit voltage.
6. circuit as claimed in claim 5, it is characterized in that, described rectification filtering module comprises thermistor, first protective tube, low pass filter, rectifier bridge stack and filter capacitor, described first protective tube first end is connected with positive source, described first protective tube second end is connected with the first end of described thermistor, second termination power negative pole of described thermistor, second end of described low pass filter is connected with the first end of thermistor, the first end of described low pass filter is connected with the second end of described thermistor, 3rd end of described low pass filter is connected with the second input of described rectifier bridge stack, 4th end of described low pass filter is connected with the first input end of described rectifier bridge stack, first of described rectifier bridge stack exports the positive pole of filter capacitor described in termination, second output head grounding, the positive pole of described filter capacitor connects described voltage changing module, minus earth.
7. circuit as claimed in claim 6, it is characterized in that, described voltage changing module comprises the 5th electric capacity, 6th electric capacity, 7th electric capacity, 6th resistance, second inductance, first switching tube and transformer, the first end of filter capacitor described in first termination of described 5th electric capacity, described 6th resistance and described 5th Capacitance parallel connection, the first input end of transformer described in first termination of described 5th electric capacity, the negative pole of the 3rd diode described in second termination of described 5th electric capacity, the positive pole of described 3rd diode connects the second input of described transformer, the source electrode of described first switching tube connects the positive pole of described 3rd diode, grounded drain, grid meets PWM, first of described transformer exports the positive pole of the 4th diode described in termination, second output head grounding, the negative pole of described 4th diode connects the first end of described second inductance, the positive pole of the 6th electric capacity described in first termination of described second inductance, the minus earth of described 6th electric capacity, the positive pole of the 7th electric capacity described in second termination of described second inductance, the minus earth of described 7th electric capacity.
8. circuit as claimed in claim 2, it is characterized in that, described first triode and the second triode are PNP type triode.
9. circuit as claimed in claim 2, it is characterized in that, the model of described DC/DC transducer is MC34063.
10. circuit as claimed in claim 4, it is characterized in that, the model of described switching regulator is LM3478.
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CN107420828A (en) * 2017-07-19 2017-12-01 徐州众仁灯具有限公司 A kind of emergency light of embedded ceiling
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CN101742783A (en) * 2010-01-21 2010-06-16 海洋王照明科技股份有限公司 High power LED drive circuit with emergency function
CN101820223A (en) * 2010-04-28 2010-09-01 海洋王照明科技股份有限公司 Battery booster circuit, lamp control circuit and emergency lamp
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CN106610668A (en) * 2015-10-23 2017-05-03 深圳格林德能源有限公司 Device for improving balance performance of electric self-balancing vehicle
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CN107420828A (en) * 2017-07-19 2017-12-01 徐州众仁灯具有限公司 A kind of emergency light of embedded ceiling
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