CN207475266U - A kind of LED emergency lights constant-power charging circuit - Google Patents
A kind of LED emergency lights constant-power charging circuit Download PDFInfo
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- CN207475266U CN207475266U CN201721379634.8U CN201721379634U CN207475266U CN 207475266 U CN207475266 U CN 207475266U CN 201721379634 U CN201721379634 U CN 201721379634U CN 207475266 U CN207475266 U CN 207475266U
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Abstract
The utility model discloses input power, voltage transformation conversion module and the filter modules that a kind of LED emergency lights constant-power charging circuit includes being electrically connected successively；And invariable power module, current feedback module, feedback regulation module.Invariable power module is electrically connected to filter module；Current feedback module is used to detect the output current of invariable power module, and sends out feedback signal according to output current；Feedback regulation module is electrically connected with current feedback module and voltage transformation conversion module；Feedback regulation module receives feedback signal, and voltage transformation conversion module is controlled to make electric energy transition response, to adjust power output electric energy of the invariable power module according to pre-set constant.The utility model current feedback module is detected the charging current of battery；When charging voltage reduces, the electric current of feedback also decreases, and current feedback module feeds back to feedback regulation module, and feedback regulation module control voltage transformation conversion module exports higher charging current, so as to ensure the constant of the power of charging.
Description
Technical field
The utility model is related to field field of LED illumination, specifically, being related to a kind of switching circuit of LED emergency lights.
Background technology
LED emergency lights are a kind of emergency-lighting sets of relative energy-saving.The effect but lamp body of existing LED emergency lights shines
Rate is higher, and power is larger, so the battery capacity of LED emergency lights is larger.When charging to LED emergency lights, with battery
The increase of charging voltage and battery capacity, the charge power of used charging equipment are gradually reduced, and charging duration also can be non-
It is linearly increasing, the overlong time of full electricity is charged to battery, people is allowed to be difficult to receive.
Utility model content
The purpose of this utility model is to provide a kind of LED emergency lights constant-power charging circuits, it is intended to which solving should to LED
During the charging of anxious lamp, charge power continuously decrease caused by charging time non-linear increase the technical issues of.
The utility model provides a kind of LED emergency lights constant-power charging circuit.
The LED emergency lights constant-power charging circuit includes：The input power that is electrically connected successively, voltage transformation conversion module with
And filter module, for being converted to the voltage of the input power, the filter module is used for the voltage transformation conversion module
Voltage after being converted to the voltage transformation conversion module is filtered, and removes harmonic wave interference.
The LED emergency lights constant-power charging circuit further includes：
Invariable power module, the invariable power module is electrically connected to the filter module, for exporting electric energy；
Current feedback module, the current feedback module are electrically connected with the invariable power module, are used to detect the perseverance
The output current of power module, and feedback signal is sent out according to output current；
Feedback regulation module, the feedback regulation module are electrically connected with the current feedback module and the voltage transformation conversion module
It connects；
The feedback regulation module receives the feedback signal, and the voltage transformation conversion module is controlled to make electric energy conversion and is rung
Should, to adjust power output electric energy of the invariable power module according to pre-set constant.
Further, the input power includes：
Electromagnetic interface filter, the electromagnetic interface filter are connected electrically in electricity network；
Diode rectifier bridge, the diode rectifier bridge are electrically connected to the output terminal of the electromagnetic interface filter, for will be through
The alternating current of electromagnetic interface filter is converted to direct current；
First capacitance, the both ends of first capacitance be respectively electrically connected to the diode rectifier bridge two output terminals it
Between, for removing the high-frequency harmonic of the direct current.
Further, the voltage transformation conversion module includes：
Transformer, the transformer include primary coil and the first secondary coil；
One end of the primary coil is electrically connected with one end of the input power, and the other end of the primary coil passes through
The feedback regulation module is electrically connected with the other end of the input power；
First secondary coil is electrically connected with the filter module.
Further, the filter module includes：
First diode, the anode of first diode are connect with one end of first secondary coil；
Inductance, the inductance are connected with the other end of first diode；
Second capacitance, the anode of second capacitance are connected electrically in the cathode of first diode, second capacitance
Cathode connect with the other end of first secondary coil；
First diode is Schottky diode, for rectification.
Further, the LED emergency lights constant-power charging circuit further includes power output module, the power output mould
Block is electrically connected to the invariable power module, for output power；
The invariable power module further includes：
Voltage adjusts branch, the voltage adjust the both ends of branch respectively with two output terminals of the power output module
Electrical connection, the voltage adjust branch and include the optically coupled isolator, first resistor, the second diode that are sequentially connected in series, and described the
The anode of two diodes is connect with the cathode output end of the power output module, the electrode input end of the optically coupled isolator
It is connect with the cathode output end of the power output module；
Voltage compensation branch, the both ends of the voltage compensation branch respectively with two output terminals of the power output module
Electrical connection, the voltage compensating circuit include third diode, second resistance, third electricity with the third Diode series
Resistance, the first triode, the 4th diode and the second triode, the 4th resistance, the 5th resistance and the 6th resistance；Described first
The emitter-base bandgap grading that enters of triode is connected with the first branch, and the first branch includes the 4th resistance that is sequentially connected in series, the 5th resistance and
6th resistance, the emitter-base bandgap grading that enters of first triode are electrically connected by the 3rd resistor and the collector of second triode
It connects, the emitter of first triode is connect with the cathode output end of the power output module, first triode
Tie point connection between collector and the 5th resistance and the 6th resistance；Second triode enter emitter-base bandgap grading pass through it is described
4th diode is electrically connected to the tie point of the optically coupled isolator and the first resistor, the current collection of second triode
Pole is connected to the tie point of the second resistance and the 3rd resistor；
Constant-current source branch, the constant-current source branch include the 5th diode, anode and the work(of the 5th diode
The cathode output end connection of rate output module, the cathode of the 5th diode pass through the 4th resistance and the power output
The cathode output end connection of module.
Further, the power output module includes the third capacitance being connected between two power take-offs.
Further, the current feedback module includes being connected to the emitter and the second triode of first triode
The 7th resistance between emitter and the 6th diode for being connected to described one output terminal of optically coupled isolator, the optocoupler
Another output terminal for closing isolator is connected to the feedback regulation module.
Further, the feedback regulation module includes：
Second subprime coil, the second subprime coil and the primary coil magnetic coupling, the second subprime coil
One end is connected to the 6th diode, and the other end of the second subprime coil is connect with the diode rectifier bridge；
High-power switchgear pipe, the high-power switchgear pipe include control terminal, output terminal and Enable Pin, the Enable Pin with
One end connection of disconnected 6th diode of second subprime coil；The control terminal of the high-power switchgear pipe and the optocoupler
Another output terminal connection of isolator is closed, the output terminal of the high-power switchgear pipe is connect with the primary coil.
Further, the LED constant-power charging circuits further include clamper protection branch, and the clamper protects the two of branch
Respectively with the parallel connection of primary windings, clamper protection branch includes the 7th diode and the 8th diode at end, and described the
Seven diodes are connect toward each other with the cathode of the 8th diode.
In LED emergency lights constant-power charging circuit disclosed in the utility model, meet an urgent need when invariable power module is connected to LED
When charging on lamp, current feedback module is always detected the charging current of battery, when battery charging voltage reduces, electric current
The electric current of feedback module feedback also decreases, and feedback current is fed back to feedback regulation module by current feedback module, and feedback is adjusted
Module is saved by the control to voltage transformation conversion module, control voltage transformation conversion module exports higher charging current, so as to protect
Demonstrate,prove the constant of the power of charging, can solve in LED emergency light charging processes, charge power continuously decrease caused by charging when
Between non-linear increase the technical issues of.
Description of the drawings
Fig. 1 is the module map of the utility model LED emergency light constant-power charging circuits；
Fig. 2 is the utility model LED emergency light constant-power charging circuit schematic diagrams.
Specific embodiment
The utility model is further elaborated and illustrated with reference to specific embodiment and Figure of description:
The utility model provides a kind of LED emergency lights constant-power charging circuit.
It please refers to Fig.1 and Fig. 2, LED emergency lights constant-power charging circuit provided by the utility model includes：Input power
100th, voltage transformation conversion module 200, filter module 300, invariable power module 400, current feedback module 500 and feedback regulation module
600。
Wherein, input power 100, voltage transformation conversion module 200 and filter module 300 are electrically connected successively, transformation conversion
For being converted to the voltage of input power 100, filter module 300 is used for after being converted to voltage transformation conversion module 200 module 200
Voltage be filtered, remove harmonic wave interference.
Wherein, invariable power module 400 is electrically connected to filter module 300, for exporting electric energy；Current feedback module 500 with
Invariable power module 400 is electrically connected, and is used to detect the output current of invariable power module 400, and send out feedback according to output current
Signal；Feedback regulation module 600 is electrically connected with current feedback module 500 and voltage transformation conversion module 200；Feedback regulation module 600
Feedback signal is received, and voltage transformation conversion module 200 is controlled to make electric energy transition response, to adjust invariable power module 400 according to pre-
If constant power output electric energy.
In the utility model, when invariable power module 400, which is connected to, to charge on LED emergency lights, current feedback module 500
The charging current of battery is detected always, when battery charging voltage reduces, current feedback module feedback electric current also with
Reduction, feedback current feeds back to feedback regulation module 600 by current feedback module, and feedback regulation module 600 is by transformation
The control of modular converter 200, control voltage transformation conversion module 200 export higher charging current, so as to ensure the work(of charging
Rate it is constant, can solve in LED emergency light charging processes, charge power continuously decrease caused by the charging time it is non-linear
The technical issues of increase.
Further, input power 100 includes：Electromagnetic interface filter 11, diode rectifier bridge 12, the first capacitance C1.
Wherein, electromagnetic interface filter 11 is connected electrically in electricity network；Diode rectifier bridge 12 is electrically connected to EMI wave filters 11
Output terminal, for the alternating current through electromagnetic interface filter 11 to be converted to direct current；The both ends of first capacitance C1 are respectively electrically connected to two
Between two output terminals of pole pipe rectifier bridge 12, for removing the high-frequency harmonic of direct current.
Further, voltage transformation conversion module 200 includes transformer S.Transformer S includes primary coil S1 and first time
Grade coil S2；One end of primary coil S1 is electrically connected with one end of input power 100, and the other end of primary coil S1 passes through feedback
Adjustment module 600 is electrically connected with the other end of input power 100；First secondary coil S2 is electrically connected with filter module 300.
In the utility model, primary coil S1 inputs are ripple DC voltages, are converted by the voltage of variation
In the first secondary coil S2 that magnetic field exports electric energy, and powered by the first secondary coil S2 to the invariable power module 400 at rear.
Further, filter module 300 includes：First diode D1, inductance L, the second capacitance C2.First diode D1's
Anode is connect with one end of the first secondary coil S2；Inductance L connects with the other end of the first diode D1；Second capacitance C2's
Anode is connected electrically in the cathode of the first diode D1, and the cathode of the second capacitance C2 is connect with the other end of the first secondary coil S2；
First diode D1 is Schottky diode, for rectification.
In the utility model embodiment, filter module 300 selects the filtering of T shapes, and this filter circuit can filter off circuit
In higher hamonic wave, particularly when the first D1 Schottky diodes of diode, it can also be ensured that filter module 300 export
Voltage it is constant.
Further, LED emergency lights constant-power charging circuit further includes power output module 500, power output module 500
Invariable power module 400 is electrically connected to, for output power.
Wherein, invariable power module 400 further includes：Voltage adjusts branch, voltage compensation branch, constant-current source branch.
The both ends that voltage adjusts branch are electrically connected respectively with two output terminals of power output module 500, and voltage adjusts branch
Road includes the optically coupled isolator IC2, first resistor R1, the second diode D2 that are sequentially connected in series, the anode of the second diode D2 with
The cathode output end connection of power output module 500, electrode input end and the power output module 500 of optically coupled isolator IC2
Cathode output end connection.
Voltage adjust branch in, the second diode D2 is voltage-stabiliser tube, by voltage-stabiliser tube connect an optical coupling every
From device IC2, the voltage between two output terminals of power output module 500 can be made to keep substantially constant, play voltage adjusting
Effect.
The both ends of voltage compensation branch are electrically connected respectively with two output terminals of power output module 500, voltage compensation electricity
Road includes third diode D3, the second resistance R2 to connect with third diode D3,3rd resistor R3, the first triode T1, the
Four diode D4 and the second triode T2, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6；First triode T1's
Enter emitter-base bandgap grading to connect with the first branch, the first branch includes the 4th resistance R4 being sequentially connected in series, the 5th resistance R5 and the 6th resistance
The emitter-base bandgap grading that enters of R6, the first triode T1 are electrically connected by 3rd resistor R3 with the collector of the second triode T2, the first triode
The cathode output end of the emitter of T1 and power output module connects, the collector of the first triode T1 and the 5th resistance R5 and the
Tie point connection between six resistance R6；Second triode T2 enter emitter-base bandgap grading by the 4th diode D4 be electrically connected to optical coupling every
Tie point from device IC2 and first resistor R1, the collector of the second triode T2 are connected to second resistance R2 and 3rd resistor R3
Tie point.
Constant-current source branch includes the 5th diode D5, and the anode of the 5th diode D5 and the cathode of power output module export
End connection, the cathode of the 5th diode D5 are connected by the cathode output end of the 4th resistance R4 and power output module.
Further, power output module includes the third capacitance C3 being connected between two power take-offs.
Further, current feedback module 500 includes being connected to the emitter and the second triode T2 of the first triode T1
The 7th resistance R7 between emitter and the 6th diode D6 for being connected to mono- output terminal of optically coupled isolator IC2, optocoupler
Another output terminal for closing isolator IC2 is connected to feedback regulation module 600.
Further, feedback regulation module 600 includes：Second subprime coil T2, high-power switchgear pipe IC1.Second subprime
Coil T2 and primary coil S1 magnetic couplings, one end of second subprime coil T2 is connected to the 6th diode D6, second subprime coil
The other end of T2 is connect with diode rectifier bridge 12；High-power switchgear pipe IC1 includes control terminal, output terminal and Enable Pin, makes
Energy end is connect with one end of the disconnected 6th diode D6 of second subprime coil T2；The control terminal and light of high-power switchgear pipe IC1
Another output terminal connection of coupling isolator IC2, the output terminal of high-power switchgear pipe IC1 are connect with primary coil S1.
In the present embodiment, when the voltage on 500 liang of output terminals of power output module declines, the 7th resistance R7 both ends
Electric current will reduce, the electric current that voltage is adjusted on the optically coupled isolator IC2 of branch road at this time will reduce, so as to cause light
Electric current on the output terminal of coupling isolator IC2 decreases.
After current reduction on the output terminal of optically coupled isolator IC2, it is connected to optically coupled isolator IC2 output terminals
On high-power switchgear pipe IC1 control terminal on electric current will reduce, so as to stimulate the output terminal of high-power switchgear pipe IC1
Raised electric current is exported to the primary coil 1 of transformer S.Further, after the electric current increase on primary coil S1, first grade
The electric current and voltage of output on coil S2 also increase therewith, so as to reach on compensation 500 output terminal of power output module
Pressure drop ensure that the constant of power.Further, LED constant-power charging circuits further include clamper protection branch, clamper protection branch
The both ends on road are in parallel with primary coil S1 respectively, and clamper protection branch includes the 7th diode D7 and the 8th diode D8, the
Seven diode D7 are connect toward each other with the cathode of the 8th diode D8.
In the present embodiment, clamper protection branch is mainly used for the voltage for making the output terminal on high-power switchgear pipe IC1
Will not be breakdown because of high impulse or the voltage bur of the voltage on primary coil S1, play protection high-power switchgear pipe
The purpose of IC1.
Finally it should be noted that above example is only to illustrate the technical solution of the utility model rather than to this reality
With the limitation of novel protected range, although being explained in detail with reference to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the utility model, without departing from this
The spirit and scope of utility model technical solution.
Claims (9)
1. a kind of LED emergency lights constant-power charging circuit, including be electrically connected successively input power, voltage transformation conversion module with
And filter module, for being converted to the voltage of the input power, the filter module is used for the voltage transformation conversion module
Voltage after being converted to the voltage transformation conversion module is filtered, and removes harmonic wave interference, which is characterized in that the LED emergency lights
Constant-power charging circuit further includes：
Invariable power module, the invariable power module is electrically connected to the filter module, for exporting electric energy；
Current feedback module, the current feedback module are electrically connected with the invariable power module, are used to detect the invariable power
The output current of module, and feedback signal is sent out according to output current；
Feedback regulation module, the feedback regulation module are electrically connected with the current feedback module and the voltage transformation conversion module；
The feedback regulation module receives the feedback signal, and the voltage transformation conversion module is controlled to make electric energy transition response,
To adjust power output electric energy of the invariable power module according to pre-set constant.
2. LED emergency lights constant-power charging circuit as described in claim 1, which is characterized in that the input power includes：
Electromagnetic interface filter, the electromagnetic interface filter are connected electrically in electricity network；
Diode rectifier bridge, the diode rectifier bridge are electrically connected to the output terminal of the electromagnetic interface filter, for that will be filtered through EMI
The alternating current of wave device is converted to direct current；
First capacitance, the both ends of first capacitance are respectively electrically connected between two output terminals of the diode rectifier bridge, are used
In the high-frequency harmonic for removing the direct current.
3. LED emergency lights constant-power charging circuit as claimed in claim 2, which is characterized in that the voltage transformation conversion module packet
It includes：
Transformer, the transformer include primary coil and the first secondary coil；
One end of the primary coil is electrically connected with one end of the input power, and the other end of the primary coil passes through described
Feedback regulation module is electrically connected with the other end of the input power；
First secondary coil is electrically connected with the filter module.
4. LED emergency lights constant-power charging circuit as claimed in claim 3, which is characterized in that the filter module includes：
First diode, the anode of first diode are connect with one end of first secondary coil；
Inductance, the inductance are connected with the other end of first diode；
Second capacitance, the anode of second capacitance are connected electrically in the cathode of first diode, and second capacitance is born
Pole is connect with the other end of first secondary coil；
First diode is Schottky diode, for rectification.
5. LED emergency lights constant-power charging circuit as claimed in claim 4, which is characterized in that the LED emergency lights invariable power
Charging circuit further includes power output module, and the power output module is electrically connected to the invariable power module, for output work
Rate；
The invariable power module further includes：
Voltage adjusts branch, and the both ends that the voltage adjusts branch are electrically connected respectively with two output terminals of the power output module
It connecing, the voltage adjusts branch and includes the optically coupled isolator, first resistor, the second diode that are sequentially connected in series, and the described 2nd 2
The anode of pole pipe is connect with the cathode output end of the power output module, the electrode input end of the optically coupled isolator and institute
State the cathode output end connection of power output module；
Voltage compensation branch, the both ends of the voltage compensation branch are electrically connected respectively with two output terminals of the power output module
It connecing, the voltage compensation branch is including third diode, second resistance, 3rd resistor with the third Diode series, the
One triode, the 4th diode and the second triode, the 4th resistance, the 5th resistance and the 6th resistance；One or three pole
The emitter-base bandgap grading that enters of pipe is connected with the first branch, and the first branch includes the 4th resistance being sequentially connected in series, the 5th resistance and the 6th
Resistance, the emitter-base bandgap grading that enters of first triode are electrically connected by the 3rd resistor with the collector of second triode, institute
The emitter for stating the first triode is connect with the cathode output end of the power output module, the collector of first triode
Tie point between the 5th resistance and the 6th resistance is connect；Second triode enters emitter-base bandgap grading by the described 4th 2
Pole pipe is electrically connected to the tie point of the optically coupled isolator and the first resistor, the collector connection of second triode
To the tie point of the second resistance and the 3rd resistor；
Constant-current source branch, the constant-current source branch include the 5th diode, and the anode and the power of the 5th diode are defeated
Go out the cathode output end connection of module, the cathode of the 5th diode passes through the 4th resistance and the power output module
Cathode output end connection.
6. LED emergency lights constant-power charging circuit as claimed in claim 5, which is characterized in that the power output module packet
Include the third capacitance being connected between two power take-offs.
7. such as LED emergency lights constant-power charging circuit described in claim 5 or 6, which is characterized in that the current feedback module
Including the 7th resistance being connected between the emitter and the second transistor emitter of first triode and it is connected to institute
State the 6th diode of one output terminal of optically coupled isolator, another output terminal of the optically coupled isolator is connected to described anti-
Present adjustment module.
8. LED emergency lights constant-power charging circuit as claimed in claim 7, which is characterized in that the feedback regulation module packet
It includes：
Second subprime coil, the second subprime coil and the primary coil magnetic coupling, one end of the second subprime coil
The 6th diode is connected to, the other end of the second subprime coil is connect with the diode rectifier bridge；
High-power switchgear pipe, the high-power switchgear pipe include control terminal, output terminal and Enable Pin, the Enable Pin with it is described
One end connection of disconnected 6th diode of second subprime coil；The control terminal of the high-power switchgear pipe and the optical coupling every
Another output terminal connection from device, the output terminal of the high-power switchgear pipe are connect with the primary coil.
9. LED emergency lights constant-power charging circuit as claimed in claim 8, which is characterized in that the LED invariable powers charging electricity
Road further includes clamper protection branch, and respectively with the parallel connection of primary windings, the clamper protects for the both ends of clamper protection branch
It protects branch and includes the 7th diode and the 8th diode, the cathode of the 7th diode and the 8th diode phase each other
To connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721379634.8U CN207475266U (en) | 2017-10-25 | 2017-10-25 | A kind of LED emergency lights constant-power charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721379634.8U CN207475266U (en) | 2017-10-25 | 2017-10-25 | A kind of LED emergency lights constant-power charging circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207475266U true CN207475266U (en) | 2018-06-08 |
Family
ID=62264674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721379634.8U Active CN207475266U (en) | 2017-10-25 | 2017-10-25 | A kind of LED emergency lights constant-power charging circuit |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245519A (en) * | 2018-11-06 | 2019-01-18 | 西安拓尔微电子有限责任公司 | A kind of segmented invariable power charge switch power supply |
| CN110086233A (en) * | 2019-06-01 | 2019-08-02 | 深圳市永航新能源技术有限公司 | A kind of power adaptive charging method and charging unit |
-
2017
- 2017-10-25 CN CN201721379634.8U patent/CN207475266U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245519A (en) * | 2018-11-06 | 2019-01-18 | 西安拓尔微电子有限责任公司 | A kind of segmented invariable power charge switch power supply |
| CN110086233A (en) * | 2019-06-01 | 2019-08-02 | 深圳市永航新能源技术有限公司 | A kind of power adaptive charging method and charging unit |
| CN110086233B (en) * | 2019-06-01 | 2021-09-03 | 深圳市永航新能源技术有限公司 | Power self-adaptive charging method and charging device |
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