CN215954175U - High-frequency constant-current power supply of semiconductor laser - Google Patents
High-frequency constant-current power supply of semiconductor laser Download PDFInfo
- Publication number
- CN215954175U CN215954175U CN202121008133.5U CN202121008133U CN215954175U CN 215954175 U CN215954175 U CN 215954175U CN 202121008133 U CN202121008133 U CN 202121008133U CN 215954175 U CN215954175 U CN 215954175U
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- Prior art keywords
- controller
- power supply
- current power
- semiconductor laser
- constant current
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005485 electric heating Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000013021 overheating Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a high-frequency constant current power supply of a semiconductor laser, in particular to the technical field of constant current power supplies, which comprises a constant current power supply body and a shell, wherein a controller is arranged on the inner wall of the shell and positioned on the outer wall of the constant current power supply, a temperature sensor is arranged on the inner wall of the shell, the input end of the controller is connected with the temperature sensor, the input end of the controller is also connected with a sampling circuit, a judgment circuit is arranged in the controller, and the output end of the controller is respectively connected with an emergency cut-off circuit, a cooling device and a current adjusting circuit.
Description
Technical Field
The utility model relates to the technical field of constant current power supplies, in particular to a high-frequency constant current power supply of a semiconductor laser.
Background
The semiconductor laser is an electro-optical conversion device with high conversion efficiency and easy control, and is widely applied to the fields of industrial processing, communication medical treatment, national defense and military industry and the like. The semiconductor laser driving power supply plays a role in driving, controlling and protecting the semiconductor laser, and the quality of the technical performance of the semiconductor laser driving power supply directly influences the quality, reliability and service life of a light source of a semiconductor laser system.
The prior art scheme has the following defects: semiconductor lasers in the prior art are prone to overheating during long-time operation, and therefore an overheating protection device is needed for a high-frequency constant-current power supply.
Disclosure of Invention
The utility model aims to provide a high-frequency constant current power supply of a semiconductor laser, which has an overheating protection effect.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a semiconductor laser high frequency constant current power supply, includes constant current power supply body and shell, the shell inner wall is provided with the controller, the controller is located the constant current power supply outer wall, the shell inner wall is provided with temperature sensor, the input and the temperature sensor of controller are connected, the input of controller still is connected with sampling circuit, the inside judgement circuit that sets up of controller, the controller output is connected with urgent cutting off circuit and heat sink and current regulation circuit respectively.
Preferably, the cooling device adopts metal radiating fins and a fan.
Preferably, the inner wall of the shell is embedded with a heating wire, and the output end of the controller is also connected with the heating wire.
Preferably, the sampling circuit comprises an MPS3904 triode, a first diode, a second diode, a 1000 ohm resistor and a 2200 ohm resistor, wherein a B pole of the MPS3904 triode is connected with the 2200 ohm resistor in series;
the E pole of the MPS3904 triode is grounded, and the E pole of the MPS3904 triode is connected with the first diode and the second diode in series;
the C electrode of the MPS3904 triode is connected with a 1000 ohm resistor in series and is connected to VCC;
the second diode is communicated with the 2200 ohm resistor, a current input end is arranged between the second diode and the 2200 ohm resistor, and a current output end is arranged between the 1000 ohm resistor and the MPS3904 triode C electrode.
Preferably, the output end of the controller is further connected with a buzzer.
In conclusion, the utility model has the beneficial effects that:
the judging circuit judges according to the temperature sensor and the current from the sampling circuit, and if the temperature of the temperature sensor is too high and the current in the sampling circuit is not large, the cooling device is started; if the temperature of the temperature sensor is too high and the current in the sampling circuit is large, the reaction of the emergency cut-off circuit is carried out; if the temperature of the temperature sensor is not high and the current in the sampling circuit is not large, the normal operation is maintained, and if the temperature of the temperature sensor is not high and the current in the sampling circuit is large, the current is adjusted through the current adjusting circuit.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a structural view of the housing of the present invention.
The marks in the figure are respectively 1 and a constant current power supply body; 2. a housing; 3. a controller; 31. a judgment circuit; 4. a temperature sensor; 5. an emergency shutdown circuit; 6. a cooling device; 7. a current adjusting device; 8. a buzzer.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a semiconductor laser high frequency constant current power supply, includes constant current power supply body 1 and shell 2, 2 inner walls of shell are provided with controller 3, controller 3 is located constant current power supply body 1 outer wall, 2 inner walls of shell are provided with temperature sensor 4, the input and the temperature sensor 4 of controller 3 are connected, the input of controller 3 still is connected with sampling circuit, 3 inside judgement circuits 31 that set up of controller, 3 outputs of controller are connected with urgent cutting circuit 5 and heat sink 6 and current adjusting circuit 7 respectively.
The working principle is as follows: the judging circuit judges according to the temperature sensor and the current from the sampling circuit, and if the temperature of the temperature sensor is too high and the current in the sampling circuit is not large, the cooling device is started; if the temperature of the temperature sensor is too high and the current in the sampling circuit is large, the reaction of the emergency cut-off circuit is carried out; if the temperature of the temperature sensor is not high and the current in the sampling circuit is not large, the normal operation is maintained, and if the temperature of the temperature sensor is not high and the current in the sampling circuit is large, the current is adjusted through the current adjusting circuit.
The cooling device 6 adopts metal radiating fins and a fan.
The inner wall of the shell 2 is embedded with an electric heating wire, the output end of the controller 3 is also connected with the electric heating wire, and the structure can maintain normal functions in a cold area.
The sampling circuit comprises an MPS3904 triode, a first diode, a second diode, a 1000 ohm resistor and a 2200 ohm resistor, wherein a B pole of the MPS3904 triode is connected with the 2200 ohm resistor in series;
the E pole of the MPS3904 triode is grounded, and the E pole of the MPS3904 triode is connected with the first diode and the second diode in series;
the C electrode of the MPS3904 triode is connected with a 1000 ohm resistor in series and is connected to VCC;
the second diode is communicated with the 2200 ohm resistor, a current input end is arranged between the second diode and the 2200 ohm resistor, and a current output end is arranged between the 1000 ohm resistor and the MPS3904 triode C electrode.
Two diodes are used for current sampling, the sensitivity is very high, the current can have a large dynamic range, and the method is suitable for high-power or high-voltage application occasions.
The output end of the controller 3 is also connected with a buzzer 8.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. A semiconductor laser high frequency constant current power supply is characterized in that: including constant current power supply body (1) and shell (2), shell (2) inner wall is provided with controller (3), controller (3) are located constant current power supply body (1) outer wall, shell (2) inner wall is provided with temperature sensor (4), the input and the temperature sensor (4) of controller (3) are connected, the input of controller (3) still is connected with sampling circuit, controller (3) inside sets up judgement circuit (31), controller (3) output is connected with emergency cut-off circuit (5) and heat sink (6) and current adjustment circuit (7) respectively.
2. A high-frequency constant current power supply for a semiconductor laser as claimed in claim 1, wherein: the cooling device (6) adopts metal radiating fins and a fan.
3. A high-frequency constant current power supply for a semiconductor laser as claimed in claim 2, wherein: the inner wall of the shell (2) is embedded with an electric heating wire, and the output end of the controller (3) is also connected with the electric heating wire.
4. A high-frequency constant current power supply for a semiconductor laser as claimed in claim 3, wherein: the sampling circuit comprises an MPS3904 triode, a first diode, a second diode, a 1000 ohm resistor and a 2200 ohm resistor, wherein a B pole of the MPS3904 triode is connected with the 2200 ohm resistor in series;
the E pole of the MPS3904 triode is grounded, and the E pole of the MPS3904 triode is connected with the first diode and the second diode in series;
the C electrode of the MPS3904 triode is connected with a 1000 ohm resistor in series and is connected to VCC;
the second diode is communicated with the 2200 ohm resistor, a current input end is arranged between the second diode and the 2200 ohm resistor, and a current output end is arranged between the 1000 ohm resistor and the MPS3904 triode C electrode.
5. A high-frequency constant-current power supply for a semiconductor laser as claimed in claim 4, wherein: the output end of the controller (3) is also connected with a buzzer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121008133.5U CN215954175U (en) | 2021-05-12 | 2021-05-12 | High-frequency constant-current power supply of semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121008133.5U CN215954175U (en) | 2021-05-12 | 2021-05-12 | High-frequency constant-current power supply of semiconductor laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215954175U true CN215954175U (en) | 2022-03-04 |
Family
ID=80504138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121008133.5U Expired - Fee Related CN215954175U (en) | 2021-05-12 | 2021-05-12 | High-frequency constant-current power supply of semiconductor laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215954175U (en) |
-
2021
- 2021-05-12 CN CN202121008133.5U patent/CN215954175U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220304 |