CN213935866U - High-frequency transformer for switching power supply - Google Patents
High-frequency transformer for switching power supply Download PDFInfo
- Publication number
- CN213935866U CN213935866U CN202022938724.4U CN202022938724U CN213935866U CN 213935866 U CN213935866 U CN 213935866U CN 202022938724 U CN202022938724 U CN 202022938724U CN 213935866 U CN213935866 U CN 213935866U
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- box body
- frequency transformer
- frequency
- thermistor
- power supply
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Abstract
The utility model relates to a high frequency transformer for switching power supply, include: the two sides of the box body are provided with communicated heat dissipation fences, and the bottom of the box body is provided with a mounting plate; the front side of the box body is provided with an output connecting port, and the back side of the box body is provided with an input connecting port; the high-frequency bypass capacitor is arranged on one side in the box body and is electrically connected with the input connecting port; the high-frequency transformer is arranged on one side of the interior of the box body, which is far away from the high-frequency bypass capacitor, and is electrically connected with the output connection port; the high-frequency transformer is electrically connected with the high-frequency bypass capacitor through the constant value protection resistor; the heat radiation fan is arranged at the top end in the box body in a communicating manner; the thermistor is arranged on one side of the cooling fan; the output end of the thermistor is connected with the cooling fan, and the input end of the thermistor is respectively connected with the high-frequency bypass capacitor and the high-frequency transformer. The utility model adopts the air cooling mode to replace the radiating fins for heat radiation, and the heat radiation efficiency is higher; and the negative temperature coefficient thermistor automatically adjusts the rotating speed of the cooling fan according to the temperature change in the transformer, thereby realizing the function of automatically adjusting the cooling.
Description
Technical Field
The utility model relates to a high frequency transformer for switching power supply belongs to transformer technical field.
Background
The switching power supply is a common power supply system in various power supply devices, a high-frequency transformer in the switching power supply is a core component, and how to design the high-frequency transformer to improve the reliability of the high-frequency transformer, so that the performance of the switching power supply is improved. Most of transformers in the existing switching power supply are cooled through cooling fins, so that the transformers are easy to generate high temperature in a long-time working process, and the use safety of the transformers is affected.
Therefore, how to provide a high-frequency transformer for an air-cooled switching power supply capable of automatically adjusting heat dissipation is the research object of the utility model.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a high-frequency transformer for a switching power supply, which adopts an air cooling mode to replace a radiating fin for heat radiation, and has higher heat radiation efficiency; and the negative temperature coefficient thermistor automatically adjusts the rotating speed of the cooling fan according to the temperature change in the transformer, thereby realizing the function of automatically adjusting the cooling.
For solving the prior art problem, the utility model discloses the technical scheme who adopts is:
a high-frequency transformer for a switching power supply comprises a box body, a high-frequency transformer, a constant value protection resistor, a cooling fan, a thermistor and a high-frequency bypass capacitor; the two sides of the box body are provided with communicated heat dissipation fences, and the bottom of the box body is provided with a mounting plate; the front side of the box body is provided with an output connecting port, and the back side of the box body is provided with an input connecting port; the high-frequency bypass capacitor is arranged on one side in the box body and is electrically connected with the input connecting port; the high-frequency transformer is arranged on one side of the interior of the box body, which is far away from the high-frequency bypass capacitor, and is electrically connected with the output connection port; the high-frequency transformer is electrically connected with the high-frequency bypass capacitor through the constant value protection resistor; the heat radiation fan is arranged at the top end in the box body in a communicating manner; the thermistor is arranged on one side of the heat radiation fan; the output end of the thermistor is connected with the cooling fan, and the input end of the thermistor is respectively connected with the high-frequency bypass capacitor and the high-frequency transformer.
Furthermore, the box body is made of aluminum alloy materials.
Furthermore, the mounting plate is provided with a mounting screw hole.
Further, the heat dissipation fan is an axial flow fan.
Further, the thermistor is a negative temperature coefficient thermistor.
Furthermore, the resistance range of the constant value protection resistor is set to be 10K omega-100K omega.
Furthermore, the working frequency range of the high-frequency transformer is set to be 10kHz-50 kHz.
The utility model has the advantages that: the air cooling mode is adopted to replace a radiating fin for radiating, so that the radiating efficiency is higher; and the negative temperature coefficient thermistor automatically adjusts the rotating speed of the cooling fan according to the temperature change in the transformer, thereby realizing the function of automatically adjusting the cooling.
Drawings
Fig. 1 is an internal structure view of the present invention.
Fig. 2 is an external structure view of the present invention.
Wherein: the high-frequency transformer-based high-frequency protection circuit comprises a box body 1, a high-frequency transformer 2, a constant value protection resistor 3, a cooling fan 4, a thermistor 5, a high-frequency bypass capacitor 6, a cooling fence 7, a mounting plate 8, a mounting screw hole 9, an output connection port 10 and an input connection port 11.
Detailed Description
In order to make the technical solution of the present invention more understandable to those skilled in the art, the present invention is further analyzed with reference to fig. 1-2.
As shown in fig. 1-2, a high-frequency transformer for a switching power supply comprises a box body 1, a high-frequency transformer 2, a constant value protection resistor 3, a cooling fan 4, a thermistor 5 and a high-frequency bypass capacitor 6; the two sides of the box body 1 are provided with communicated heat dissipation fences 7, so that ventilation and heat dissipation are facilitated; the bottom is provided with an installation plate 8 which is conveniently arranged on the switching power supply through a bolt; the front surface of the box body 1 is provided with an output connecting port 10, and the back surface is provided with an input connecting port 11; the high-frequency bypass capacitor 6 is arranged on one side inside the box body 1 and is electrically connected with the input connecting port 11, the high-frequency bypass capacitor 6 is used for filtering high frequency and reserving low frequency, and high-frequency current is supplied to the high-frequency voltage transformer 2; the high-frequency transformer 2 is arranged on one side of the interior of the box body 1, which is far away from the high-frequency bypass capacitor 6, and is electrically connected with the output connection port 10; the high-frequency transformer 2 is electrically connected with the high-frequency bypass capacitor 6 through the fixed value protection resistor 3; the heat radiation fan 4 is arranged at the top end in the box body 1 in a communicating manner; the thermistor 5 is arranged on one side of the heat radiation fan 4; the output end of the thermistor 5 is connected with the heat radiation fan 4, and the input end is respectively connected with the high-frequency bypass capacitor 6 and the high-frequency transformer 2.
In this embodiment, preferably, the box body 1 is made of an aluminum alloy material, so that the weight is light and the antirust performance is good.
In this embodiment, preferably, the mounting plate 8 is provided with a mounting screw hole 9, which facilitates bolt fastening.
In this embodiment, the heat dissipation fan 4 is preferably configured as an axial fan.
In this embodiment, the thermistor 5 is preferably a negative temperature coefficient thermistor, the resistance value of which decreases with increasing temperature, the resistance value of the thermistor 5 decreases with increasing temperature in the case 1, and the heat dissipation speed increases with increasing current through the heat dissipation fan 4.
In this embodiment, preferably, the resistance range of the fixed value protection resistor 3 is set to 10K Ω -100K Ω.
In this embodiment, the operating frequency range of the high-frequency transformer 2 is preferably set to 10kHz to 50 kHz.
When the utility model is used, when the input voltage is commercial power (low frequency voltage), the current is transmitted to the high frequency transformer 2 and the cooling fan 4 through the high frequency bypass capacitor 6, and the negative temperature coefficient thermistor 5 automatically adjusts the current input into the cooling fan 4 according to the temperature change in the box body, and adjusts the cooling speed; when the input voltage is high-frequency voltage, because the heat radiation fan 4 needs to input low-frequency voltage (commercial power), the high-frequency bypass capacitor 6 filters the high-frequency current and then transmits the high-frequency current to the high-frequency transformer 2, and the high-frequency current is transformed by the high-frequency transformer 2 and then is transmitted to the negative temperature coefficient thermistor 5 and the heat radiation fan 4; the high frequency transformer 2 outputs a high frequency voltage through the output connection port 10. The utility model adopts the air cooling mode to replace the radiating fins for heat radiation, and the heat radiation efficiency is higher; and the negative temperature coefficient thermistor 5 automatically adjusts the rotating speed of the cooling fan 4 according to the temperature change in the transformer, thereby realizing the function of automatically adjusting the cooling.
The technical solutions provided by the present application are introduced in detail, and the principles and embodiments of the present application are explained herein by applying embodiments, and the descriptions of the embodiments are only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. A high-frequency transformer for a switching power supply is characterized in that: the high-frequency transformer is characterized by comprising a box body, a high-frequency transformer, a constant value protection resistor, a cooling fan, a thermistor and a high-frequency bypass capacitor; the two sides of the box body are provided with communicated heat dissipation fences, and the bottom of the box body is provided with a mounting plate; the front side of the box body is provided with an output connecting port, and the back side of the box body is provided with an input connecting port; the high-frequency bypass capacitor is arranged on one side in the box body and is electrically connected with the input connecting port; the high-frequency transformer is arranged on one side of the interior of the box body, which is far away from the high-frequency bypass capacitor, and is electrically connected with the output connection port; the high-frequency transformer is electrically connected with the high-frequency bypass capacitor through the constant value protection resistor; the heat radiation fan is arranged at the top end in the box body in a communicating manner; the thermistor is arranged on one side of the heat radiation fan; the output end of the thermistor is connected with the cooling fan, and the input end of the thermistor is respectively connected with the high-frequency bypass capacitor and the high-frequency transformer.
2. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the box body is made of aluminum alloy materials.
3. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the mounting plate is provided with a mounting screw hole.
4. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the heat radiation fan is an axial flow fan.
5. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the thermistor is set as a negative temperature coefficient thermistor.
6. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the resistance range of the constant value protection resistor is set to be 10K omega-100K omega.
7. The high-frequency transformer for a switching power supply according to claim 1, characterized in that: the working frequency range of the high-frequency transformer is set to be 10kHz-50 kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022938724.4U CN213935866U (en) | 2020-12-10 | 2020-12-10 | High-frequency transformer for switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022938724.4U CN213935866U (en) | 2020-12-10 | 2020-12-10 | High-frequency transformer for switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213935866U true CN213935866U (en) | 2021-08-10 |
Family
ID=77149811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022938724.4U Expired - Fee Related CN213935866U (en) | 2020-12-10 | 2020-12-10 | High-frequency transformer for switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213935866U (en) |
-
2020
- 2020-12-10 CN CN202022938724.4U patent/CN213935866U/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: 20210810 Termination date: 20211210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |