CN209299559U - A kind of linear constant current circuit with high conversion efficiency - Google Patents
A kind of linear constant current circuit with high conversion efficiency Download PDFInfo
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- CN209299559U CN209299559U CN201821404567.5U CN201821404567U CN209299559U CN 209299559 U CN209299559 U CN 209299559U CN 201821404567 U CN201821404567 U CN 201821404567U CN 209299559 U CN209299559 U CN 209299559U
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Abstract
The utility model belongs to the technical field of constant-current circuit, more particularly to a kind of linear constant current circuit with high conversion efficiency, including main control module (1), DC voltage control module (2), voltage feedback module (3) and constant flow module (4), the main control module (1) and the DC voltage control module (2), the voltage feedback module (3) and the constant flow module (4) electrical connection, the DC voltage control module (2), the voltage feedback module (3) and the constant flow module (4) are electrically connected with load (5) respectively, the main control module (1), the DC voltage control module (2), the constant flow module (4) and the load (5) concatenation forming circuit.The utility model is by driving tube both ends minimum in holding circuit, and constant high conversion efficiency, realizing reduces calorific value and oneself power consumption, facilitates the volume for reducing circuit, expands the range of output voltage, and improve current conversion efficiency.
Description
Technical field
The utility model belongs to the technical field of constant-current circuit, and in particular to a kind of linear constant current with high conversion efficiency
Circuit.
Background technique
Nowadays, in the failure of removal that illuminator occurs, most failure is circuit design problem, so circuit is set
The selection of meter scheme also have it is very important, it is reliable, low cost this requires selecting suitable circuit in product design
Circuit is the premise for producing illuminator.Can be obtained according to the optical characteristics of LED, if forward current increases, the brightness of LED also with
Increase, in order to keep the constant stabilization it is necessary to guarantee LED forward current of LED light emission luminance.Therefore it designs reasonable linear permanent
It is particularly significant just to seem for LED illumination lamp for current circuit.
Wherein, Chinese patent literature discloses a kind of LED linear constant current power supply (publication number: 202679742 U of CN), packet
Include: EMC circuit, rectification circuit, constant-current control circuit and load, alternating current input power supplying are sent into rectification after EMC circuit filtering
Circuit, the electric current after rectified circuit is rectified are sent into constant-current control circuit, and the output electric current access of constant-current control circuit is negative
It carries, the constant-current control circuit includes the identical local constant-current circuit of multiplex circuit structure, and the local constant-current circuit is
Corresponding independent one group of load is powered.Above-mentioned scheme can locally carry out current constant control to a certain extent, but this
At least there is also following defects for kind scheme: first, structure is complicated and not easy to disassemble and installation, second, needs when exporting high current
Increased cooling fin is wanted, thus will increase the volume of product, third, output voltage range very little is not able to satisfy various specified
The load of voltage.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, provide a kind of with the linear of high conversion efficiency
Constant-current circuit, by keeping the driving tube both ends minimum of DC voltage control module, constant high conversion efficiency is realized
Calorific value and oneself power consumption are reduced, facilitates the volume for reducing circuit, expands the range of output voltage, to improve electric current conversion
Efficiency.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of linear constant current circuit with high conversion efficiency, including main control module, DC voltage control module, voltage are anti-
Present module and constant flow module, the main control module and the DC voltage control module, the voltage feedback module and the perseverance
Flow module electrical connection, the DC voltage control module, the voltage feedback module and the constant flow module are electric with load respectively
Connection, the main control module, the DC voltage control module, the constant flow module and load concatenation forming circuit.
Increase voltage feedback module, slowly varying voltage deviation is continuously monitored and counted, and feeds back to main control module, has
The functions such as standby monitoring, analysis, memory, inquiry, parameter setting；DC voltage control module changes output voltage slowly, until
The electric current of constant flow module feedback is identical as preset value just to be stopped；Constant flow module is used to export current value corresponding with setting value, and
Feed back to main control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the electricity
Pressure feedback module includes output voltage detection module and load voltage detection module, the output voltage detection module and the master
Control module, the DC voltage control module and load electrical connection, the load voltage detection module and the load
Both ends and main control module electrical connection.Output voltage detection module and load voltage detection module are all by the electricity of monitoring and statistics
Pressure feeds back to main control module, and output voltage detection module is used to monitor the output voltage of DC voltage control module, load voltage
Monitoring modular is used to monitor the voltage at load both ends.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the perseverance
Flow module includes the adjustable linear constant-current driven module being sequentially connected in series and load current detection module, and the adjustable linear constant current drives
Dynamic model block is electrically connected with the main control module and the load, and the load current detection module is electrically connected with the main control module
It connects.Constant flow module is split as adjustable linear constant-current driven module and load current detection module, one of module is avoided to damage
It is bad that whole device is caused to fail, maintenance cost is reduced, adjustable linear constant-current driven module is according to the preset value in main control module, certainly
Dynamic to adjust corresponding current value, load current detection module is used to monitor the current value of circuit, and feeds back to main control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the line
Property constant-current circuit further include A/D switch power module and communication module, the output end of the A/D switch power module and described straight
Voltage control module electrical connection is flowed, the output end of the communication module is electrically connected with the main control module.A/D switch power module
Make alternating current filter to obtain a high direct voltage by high-voltage rectifying, while being supplied to DC control module；User can pass through
Setting value is modified at a distance main control module or increased to communication module, is facilitated the operation for remotely monitoring circuit, is improved electricity
The reliability on road.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the master
Controlling module is one of single-chip microcontroller and programmable logic controller (PLC), the modification scope of the DC voltage control module be 5V ~
48V.Single-chip microcontroller and programmable logic controller (PLC) possess stronger extended capability, and programming step is relatively simple, help to drop
The production cost of low circuit limits the modification scope of DC voltage control module, prevents modification scope narrow, lead to main control module
Regulate and control the range also constriction of the voltage value of load, while avoiding modification scope wide, increases the cost of DC voltage control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, it is described can
The modification scope of line transfer constant-current driven module is 10mA ~ 20A.The modification scope of adjustable linear constant-current driven module is limited, is prevented
Only modification scope is narrow, causes the load type of adaptation few, reduces the expansion capability of circuit, while preventing modification scope wide,
Lead to the cost increase of adjustable linear constant-current driven module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the A/
The output area of D switch power module is DC10V ~ DC60V, and the communication module is radio communication circuit and wire communication circuit
One of.The output area for limiting A/D switch power module, prevents output area from crossing width, can not be with DC voltage control
Module matches, while preventing output area wide, causes part output area that can not efficiently use.
It is described straight as a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model
Stream voltage control module and the adjustable linear constant-current driven module are provided with DAC chip.DAC chip sends out main control module
Digital signal out is converted into analog signal, helps to realize main control module to DC voltage control module and adjustable linear constant current
The control of drive module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the master
Control module, the DC voltage control module and the adjustable linear constant-current driven module have the function of in-service units.Due to
Main control module, DC voltage control module and adjustable linear constant-current driven module all have the function of application programming, reduce circuit
Each section interdepends, and improves the independence of each module, to improve the maintainability and scalability of circuit.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency described in the utility model, the master
It is provided in control module for the real-time voltage of the output voltage detection module and the load voltage detection module
Comparator.Comparator is for being compared two voltages, with their difference of determination, the as drive of DC voltage control module
The minimum at dynamic pipe both ends, and main control module is fed back to, main control module can make circuit by keeping minimum
Keep higher transfer efficiency.
The beneficial effects of the utility model are that the utility model includes main control module, DC voltage control module, voltage
Feedback module and constant flow module, the main control module and the DC voltage control module, the voltage feedback module and described
Constant flow module electrical connection, the DC voltage control module, the voltage feedback module and the constant flow module respectively with load
Electrical connection, the main control module, the DC voltage control module, the constant flow module and load concatenation are formed back
Road.Increase voltage feedback module, slowly varying voltage deviation is continuously monitored and counted, and feeds back to master control mould
Block has the functions such as monitoring, analysis, memory, inquiry, parameter setting；DC voltage control module changes output voltage slowly,
Just stop until the electric current of constant flow module feedback is identical as preset value；Constant flow module is for exporting electric current corresponding with setting value
Value, and main control module is fed back to, have the function of monitoring current, the drive that the utility model passes through holding DC voltage control module
Dynamic pipe both ends minimum, constant high conversion efficiency, realizing reduces calorific value and oneself power consumption, helps to reduce circuit
Volume, expands the range of output voltage, to improve current conversion efficiency.
Detailed description of the invention
Fig. 1 is the flowage structure schematic diagram of the utility model；
Wherein: 1- main control module；2- DC voltage control module；3- voltage feedback module；31- output voltage detects mould
Block；32- load voltage detection module；4- constant flow module；41- is adjustable linear constant-current driven module；42- load current detection mould
Block；5- load；6-A/D switch power module；7- communication module.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be with
It is mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside a element.For the ordinary skill in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the utility model.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
Embodiment 1
As shown in Figure 1, a kind of linear constant current circuit with high conversion efficiency, including main control module 1, DC voltage control
Module 2, voltage feedback module 3 and constant flow module 4, main control module 1 and DC voltage control module 2, voltage feedback module 3 and perseverance
Flow module 4 is electrically connected, and DC voltage control module 2, voltage feedback module 3 and constant flow module 4 are electrically connected with load 5 respectively, main
Control module 1,5 concatenation forming circuit of DC voltage control module 2, constant flow module 4 and load.Increase voltage feedback module 3, it is right
Slowly varying voltage deviation is continuously monitored and is counted, and feeds back to main control module 1, have monitoring, analysis, memory,
The functions such as inquiry, parameter setting；DC voltage control module 2 changes output voltage slowly, until the electricity that constant flow module 4 is fed back
Flow just stopping identical as preset value；Constant flow module 4 feeds back to main control module for exporting current value corresponding with setting value.
Preferably, voltage feedback module 3 includes output voltage detection module 31 and load voltage detection module 32, output electricity
Pressure detection module 31 and main control module 1, DC voltage control module 2 and load 5 be electrically connecteds, load voltage detection module 32 with bear
The both ends and main control module 1 for carrying 5 are electrically connected.Output voltage detection module 31 and load voltage detection module 32 all will monitoring and systems
For the Voltage Feedback of meter to main control module 1, output voltage detection module 31 is used to monitor the output electricity of DC voltage control module 2
Pressure, load voltage monitoring modular 32 are used to monitor the voltage at 5 both ends of load.
Preferably, constant flow module 4 includes the adjustable linear constant-current driven module 41 and load current detection mould being sequentially connected in series
Block 42, adjustable linear constant-current driven module 41 are electrically connected with main control module 1 and load 5, load current detection module 42 and master control
Module 1 is electrically connected.Constant flow module 4 is split as adjustable linear constant-current driven module 41 and load current detection module 42, is avoided
One of module damage causes whole device to fail, and reduces maintenance cost, and adjustable linear constant-current driven module 41 is according to master control
Preset value in module 1 automatically adjusts corresponding current value, and load current detection module 42 is used to monitor the current value of circuit,
And feed back to main control module 1.
Preferably, linear constant current circuit further includes A/D switch power module 6 and communication module 7, A/D switch power module 6
Output end be electrically connected with DC voltage control module 2, the output end of communication module 7 is electrically connected with main control module 1, main control module
1 is programmable logic controller (PLC), and communication module 7 is radio communication circuit.A/D switch power module 6 makes alternating current pass through high pressure
Rectifying and wave-filtering obtains a high direct voltage, while being supplied to DC control module 2；User can be by communication module 7 to master control
Setting value is modified at a distance or increased to module 1, is facilitated the operation for remotely monitoring circuit, is improved the reliability of circuit；It can
Programmed logic controller possesses stronger extended capability, and programming step is relatively simple, facilitates the production cost for reducing circuit.
Preferably, DC voltage control module 2 and adjustable linear constant-current driven module 41 are provided with DAC chip, master control
Module 1, DC voltage control module 2 and adjustable linear constant-current driven module 41 have the function of in-service units.DAC chip, will
The digital signal that main control module 1 issues is converted into analog signal, helps to realize main control module 1 to DC voltage control module 2
With the control of adjustable linear constant-current driven module 41, due to main control module 1, DC voltage control module 2 and adjustable linear constant current
Drive module 41 all has the function of application programming, reduces interdepending for circuit portions, improves the independence of each module, from
And improve the maintainability and scalability of circuit.
The working principle of the utility model is:
Linear constant current: setting value is input in main control module 1 by user by communication module 7, and main control module 1 is according to setting
Value controls adjustable linear constant-current driven module 41 and exports corresponding current value, and then after access load 5, main control module 1 is controlled
The output voltage of DC voltage control module 2 slowly changes, when the electric current and setting value phase of the detection of load current detection module 42
Deng, main control module 1 records the difference of the real-time voltage of output voltage detection module 31 and load voltage detection module 32 at this time,
The as the smallest operating voltage in driving tube both ends of DC voltage control module 2, due to driving tube power consumption and transfer efficiency at
Inverse ratio, the transfer efficiency highest of circuit, circuit heat are reduced therewith at this time, and last main control module 1 is voltage-controlled by control direct current
Molding block 2 keeps minimum constant, thus constant transfer efficiency.
Embodiment 2
Unlike the first embodiment: the main control module 1 of the present embodiment is single-chip microcontroller, the regulation of DC voltage control module 2
Range is 5V ~ 48V, and the modification scope of adjustable linear constant-current driven module 41 is 10mA ~ 20A, A/D switch power module 6 it is defeated
Range is DC10V ~ DC60V out, and communication module 7 is wire communication circuit, is provided in main control module 1 for comparing output voltage
The comparator of the real-time voltage of detection module 31 and load voltage detection module 32.Limit adjustable linear constant-current driven module 41
Modification scope prevents modification scope narrow, causes 5 type of load of adaptation few, reduces the expansion capability of circuit, while preventing from adjusting
It is wide to control range, leads to the cost increase of adjustable linear constant-current driven module 41, limits the output model of A/D switch power module 6
It encloses, prevents output area from crossing width, can not match with DC voltage control module 2, while preventing output area wide, cause
Part output area can not efficiently use, and comparator is for being compared two voltages, with their difference of determination, as directly
The minimum at the driving tube both ends of voltage control module 2 is flowed, and feeds back to main control module 1, main control module 1 passes through control
Minimum keeps transfer efficiency constant.
Should be noted single-chip microcontroller model STM32F107, this single-chip microcontroller contains Cortex-M3 kernel, and 16
A 12 ADC interfaces, 2 12 DAC interfaces, 1 10M/100M adaptive network interface, 1 USB interface, 2 CAN interfaces,
5 serial ports, 10 timers；Communication module 7 is serial communication circuit；Load 5 is vision light source；Output voltage detection module 31
It is connect with load voltage detection module 32 with the ADC interface of single-chip microcontroller.
Other structures are same as Example 1, and which is not described herein again.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (10)
1. a kind of linear constant current circuit with high conversion efficiency, it is characterised in that: voltage-controlled including main control module (1), direct current
Molding block (2), voltage feedback module (3) and constant flow module (4), the main control module (1) and the DC voltage control module
(2), the voltage feedback module (3) and the constant flow module (4) electrical connection, the DC voltage control module (2), the electricity
Pressure feedback module (3) and the constant flow module (4) are electrically connected with load (5) respectively, the main control module (1), the direct current
Press control module (2), the constant flow module (4) and the load (5) concatenation forming circuit.
2. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the voltage is anti-
Presenting module (3) includes output voltage detection module (31) and load voltage detection module (32), the output voltage detection module
(31) it is electrically connected with the main control module (1), the DC voltage control module (2) and the load (5), the load voltage
Detection module (32) is electrically connected with the both ends of the load (5) and the main control module (1).
3. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the constant current mould
Block (4) includes the adjustable linear constant-current driven module (41) being sequentially connected in series and load current detection module (42), the adjustable line
Property constant-current driven module (41) is electrically connected with the main control module (1) and the load (5), the load current detection module
(42) it is electrically connected with the main control module (1).
4. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the linear perseverance
Current circuit further includes A/D switch power module (6) and communication module (7), the output end of the A/D switch power module (6) with
DC voltage control module (2) electrical connection, the output end of the communication module (7) are electrically connected with the main control module (1).
5. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the master control mould
Block (1) is one of single-chip microcontroller and programmable logic controller (PLC), and the modification scope of the DC voltage control module (2) is 5V
~48V。
6. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the adjustable line
Property constant-current driven module (41) modification scope be 10mA ~ 20A.
7. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 4, it is characterised in that: the A/D is opened
The output area of powered-down source module (6) is DC10V ~ DC60V, and the communication module (7) is radio communication circuit and wire communication
One of circuit.
8. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the direct current
Pressure control module (2) and the adjustable linear constant-current driven module (41) are provided with DAC chip.
9. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the master control mould
Block (1), the DC voltage control module (2) and the adjustable linear constant-current driven module (41) have in-service units function
Energy.
10. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 2, it is characterised in that: the master control
The reality for the output voltage detection module (31) and the load voltage detection module (32) is provided in module (1)
When voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821404567.5U CN209299559U (en) | 2018-08-29 | 2018-08-29 | A kind of linear constant current circuit with high conversion efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821404567.5U CN209299559U (en) | 2018-08-29 | 2018-08-29 | A kind of linear constant current circuit with high conversion efficiency |
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| Publication Number | Publication Date |
|---|---|
| CN209299559U true CN209299559U (en) | 2019-08-23 |
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ID=67651977
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821404567.5U Active CN209299559U (en) | 2018-08-29 | 2018-08-29 | A kind of linear constant current circuit with high conversion efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068446A (en) * | 2018-08-29 | 2018-12-21 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit and its control method with high conversion efficiency |
-
2018
- 2018-08-29 CN CN201821404567.5U patent/CN209299559U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068446A (en) * | 2018-08-29 | 2018-12-21 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit and its control method with high conversion efficiency |
| CN109068446B (en) * | 2018-08-29 | 2024-03-29 | 广东奥普特科技股份有限公司 | Linear constant current circuit with high conversion efficiency and control method thereof |
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