CN206963164U - A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment - Google Patents
A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment Download PDFInfo
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- CN206963164U CN206963164U CN201720813122.1U CN201720813122U CN206963164U CN 206963164 U CN206963164 U CN 206963164U CN 201720813122 U CN201720813122 U CN 201720813122U CN 206963164 U CN206963164 U CN 206963164U
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- amplifier
- resistance
- power supply
- triode
- lamp power
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Abstract
A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment, the road lamp power supply includes the first amplifier, current sense resistor, first diode and optocoupler, also include the second amplifier, temperature detection resistance, 9th to 11 resistance and the first triode, the in-phase input end of second amplifier connects reference voltage by the 9th resistance, the in-phase input end of second amplifier is grounded by temperature detection resistance, the inverting input of second amplifier connects reference voltage by the tenth resistance, the inverting input of second amplifier passes through the 11st resistance eutral grounding, the output end of second amplifier is coupled to the base stage of the first triode, the grounded emitter of first triode, the colelctor electrode of first triode is coupled to the in-phase input end of the first amplifier.The road lamp power supply is used on street lamp, it is not in street lamp scintillation to be used in low temperature environment when playing machine.
Description
Technical field
The utility model is related to road lamp power supply, more particularly to a kind of road lamp power supply being adapted to operate in low temperature environment and
Street lamp.
Background technology
Refering to Fig. 1, conventional road lamp power supply constant-current circuit includes current sense resistor RSENSE, the first amplifier U1-B (computings
Amplifier abbreviation amplifier), first resistor to the 5th resistance R1~R5, the first electric capacity C1, the first diode D1, the first optocoupler PC1-
B.Its operation principle is that reference voltage V REF and the four, the 5th resistance set a comparison voltage to the in-phase input end of amplifier,
When output current increases, the voltage on current sense resistor also increases and the increase of the anti-phase input terminal voltage of amplifier, once greatly
Reduce output current in the comparison voltage of in-phase input end, amplifier output low level, optocoupler conducting, control power supply IC.
The shortcomings that this circuit, is started shooting when low temperature, and street lamp can flash, because electrochemical capacitor capacity subtracts during low temperature
Small, ESR resistor increase, street lamp is fully loaded work, causes electric capacity moment to provide so big energy, power supply is constantly restarted
Dynamic, there have been lamp sudden strain of a muscle.
Utility model content
Main purpose of the present utility model is overcome the deficiencies in the prior art, there is provided one kind is adapted to operate in low temperature environment
In road lamp power supply and street lamp.
To achieve the above object, the utility model uses following technical scheme：
A kind of road lamp power supply being adapted to operate in low temperature environment, including the first amplifier, current sense resistor, the one or two pole
Pipe and optocoupler, the inverting input of first amplifier connect the current sense resistor, the homophase input of first amplifier
Reference voltage V REF is terminated, the output end of first amplifier connects the negative electrode of first diode, first diode
Anode connect the optocoupler, in addition to the second amplifier, temperature detection resistance, the 9th resistance, the tenth resistance, the 11st resistance and
First triode, the in-phase input end of second amplifier connect the reference voltage, second fortune by the 9th resistance
The in-phase input end put is grounded by the temperature detection resistance, and the inverting input of second amplifier passes through the described tenth electricity
Resistance connects the reference voltage, and the inverting input of second amplifier passes through the 11st resistance eutral grounding, second amplifier
Output end be coupled to the base stage of first triode, the grounded emitter of first triode, first triode
Colelctor electrode be coupled to the in-phase input end of first amplifier.
Further：
Also include the 7th resistance being connected between the base stage of first triode and ground.
Also include the 8th resistance being connected between the output end of second amplifier and the base stage of first triode.
Also include the be connected between the colelctor electrode of first triode and the in-phase input end of first amplifier
Six resistance.
Also include the 5th resistance and the second electric capacity being connected in parallel between the in-phase input end and ground of first amplifier.
A kind of street lamp, including described road lamp power supply.
The beneficial effects of the utility model：
The utility model provides a kind of road lamp power supply being adapted to operate in low temperature environment, new using this practicality on street lamp
The road lamp power supply of type, it is used in low temperature environment the winter conditions of the north (such as), is not in street lamp scintillation when playing machine.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of traditional road lamp power supply；
Fig. 2 is a kind of circuit structure diagram of the road lamp power supply of embodiment of the utility model.
Embodiment
Embodiment of the present utility model is elaborated below.It is emphasized that the description below is only example
Property, rather than in order to limit the scope of the utility model and its application.
Refering to Fig. 2, in one embodiment, a kind of road lamp power supply being adapted to operate in low temperature environment, including the first fortune
Put U1-B, current sense resistor RSENSE, the first diode D1 and optocoupler PC1-B, the anti-phase input of the first amplifier U1-B
End connects the current sense resistor RSENSE, the homophase input termination reference voltage V REF of the first amplifier U1-B, described
First amplifier U1-B output end connects the negative electrode of the first diode D1, described in the anode connection of the first diode D1
Optocoupler PC1-B；The road lamp power supply also includes the second amplifier U1-A, temperature detection resistance RNTC, the 9th resistance R9, the tenth resistance
R10, the 11st resistance R11 and the first triode Q1, the in-phase input end of the second amplifier U1-A pass through the 9th resistance
R9 meets the reference voltage V REF, and the in-phase input end of the second amplifier U1-A is connect by the temperature detection resistance RNTC
Ground, the inverting input of the second amplifier U1-A meet the reference voltage V REF by the tenth resistance R10, and described second
Amplifier U1-A inverting input is grounded by the 11st resistance R11, and the output end of the second amplifier U1-A is coupled to
The base stage of the first triode Q1, the grounded emitter of the first triode Q1, the colelctor electrode of the first triode Q1
It is coupled to the in-phase input end of the first amplifier U1-B.
In a preferred embodiment, road lamp power supply also includes the be connected between the base stage of the first triode Q1 and ground
Seven resistance R7.
In a preferred embodiment, road lamp power supply also includes the output end and described first for being connected to the second amplifier U1-A
The 8th resistance R8 between triode Q1 base stage.
In a preferred embodiment, road lamp power supply also includes the colelctor electrode and described first for being connected to the first triode Q1
The 6th resistance R6 between amplifier U1-B in-phase input end.
In a preferred embodiment, road lamp power supply also include being connected in parallel the in-phase input end of the first amplifier U1-B with
The 5th resistance R5 and the second electric capacity C2 between ground.
In a kind of actual circuit, one of two diodes that the first diode D1 belongs to and connect, the first diode D1 institutes
It is to connect electric current loop circuit on one side, while being to connect Voltage loop circuit where another diode.
In another embodiment, a kind of street lamp, include the road lamp power supply of foregoing any embodiment.
Operation principle：
Reference voltage V REF and the tenth resistance R10, the 11st resistance R11 provide to the second amplifier U1-A inverting input
Comparison voltage, when low temperature, temperature detection resistance RNTC resistance increase and the second amplifier U1-A homophase input terminal voltage increase
Add, when anti-phase input terminal voltage more than the second amplifier U1-A, the second amplifier U1-A output high level, the first triode Q1
Conducting makes the 6th resistance R6 branch roads and total resistance on the 5th resistance R5 diminishes, the first amplifier U1-B of constant current homophase input
Comparison voltage step-down is held, makes that electric power outputting current diminishes and general power diminishes, so can normally be started at low temperature, power supply is normal
Temperature rises quickly after work, and temperature detection resistance RNTC resistances reduce, and voltage also reduces on the resistance, when small to the second amplifier
During U1-A anti-phase input terminal voltage, the second amplifier U1-A output low levels, the first triode Q1 cut-offs, the first amplifier U1-B's
Homophase input terminal voltage becomes original voltage again, and output power of power supply is constant.
Based on above-mentioned improvement, the road lamp power supply is used in the cold environment in northern winter, and the machine of rising is not in that street lamp dodges
Bright phenomenon.
Above content is to combine specific/preferred embodiment further detailed description of the utility model, no
It can assert that specific implementation of the present utility model is confined to these explanations.For the common skill of the utility model art
For art personnel, without departing from the concept of the premise utility, it can also make to the embodiment that these have been described
Some replacements or modification, and these are substituted or variant should all be considered as belonging to the scope of protection of the utility model.
Claims (6)
1. a kind of road lamp power supply being adapted to operate in low temperature environment, including the first amplifier, current sense resistor, the first diode
And optocoupler, the inverting input of first amplifier connect the current sense resistor, the in-phase input end of first amplifier
Reference voltage V REF is met, the output end of first amplifier connects the negative electrode of first diode, first diode
Anode connects the optocoupler, it is characterised in that also including the second amplifier, temperature detection resistance, the 9th resistance, the tenth resistance, the
11 resistance and the first triode, the in-phase input end of second amplifier connect the reference voltage by the 9th resistance,
The in-phase input end of second amplifier is grounded by the temperature detection resistance, and the inverting input of second amplifier passes through
Tenth resistance connects the reference voltage, and the inverting input of second amplifier passes through the 11st resistance eutral grounding, institute
The output end for stating the second amplifier is coupled to the base stage of first triode, and the grounded emitter of first triode is described
The colelctor electrode of first triode is coupled to the in-phase input end of first amplifier.
2. road lamp power supply as claimed in claim 1, it is characterised in that also include being connected to the base stage of first triode with
The 7th resistance between ground.
3. road lamp power supply as claimed in claim 1, it is characterised in that also include being connected to the output end of second amplifier with
The 8th resistance between the base stage of first triode.
4. road lamp power supply as claimed in claim 1, it is characterised in that also include the colelctor electrode for being connected to first triode
The 6th resistance between the in-phase input end of first amplifier.
5. the road lamp power supply as described in any one of Claims 1-4, it is characterised in that also include being connected in described first in parallel
The 5th resistance and the second electric capacity between the in-phase input end and ground of amplifier.
6. a kind of street lamp, it is characterised in that including the road lamp power supply as described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720813122.1U CN206963164U (en) | 2017-07-06 | 2017-07-06 | A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720813122.1U CN206963164U (en) | 2017-07-06 | 2017-07-06 | A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206963164U true CN206963164U (en) | 2018-02-02 |
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ID=61384053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720813122.1U Active CN206963164U (en) | 2017-07-06 | 2017-07-06 | A kind of road lamp power supply and street lamp being adapted to operate in low temperature environment |
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| Country | Link |
|---|---|
| CN (1) | CN206963164U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115134963A (en) * | 2022-06-28 | 2022-09-30 | 无锡市益明光电有限公司 | Prevent regulating circuit of LED lamp low temperature scintillation |
-
2017
- 2017-07-06 CN CN201720813122.1U patent/CN206963164U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115134963A (en) * | 2022-06-28 | 2022-09-30 | 无锡市益明光电有限公司 | Prevent regulating circuit of LED lamp low temperature scintillation |
| CN115134963B (en) * | 2022-06-28 | 2023-04-14 | 无锡市益明光电有限公司 | Prevent regulating circuit of LED lamp low temperature scintillation |
| US11792902B1 (en) | 2022-06-28 | 2023-10-17 | Wuxi Seastar Lighting Co., Ltd. | Regulating circuit capable of preventing low-temperature flickering of LED lamp |
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