CN217134170U - Low-voltage large-current intermediate-frequency transformer for intermediate-frequency energy-saving electric furnace - Google Patents
Low-voltage large-current intermediate-frequency transformer for intermediate-frequency energy-saving electric furnace Download PDFInfo
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- CN217134170U CN217134170U CN202221112143.8U CN202221112143U CN217134170U CN 217134170 U CN217134170 U CN 217134170U CN 202221112143 U CN202221112143 U CN 202221112143U CN 217134170 U CN217134170 U CN 217134170U
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Abstract
The utility model discloses a low-voltage large-current intermediate frequency transformer for an intermediate frequency energy-saving electric furnace, which belongs to the technical field of intermediate frequency transformers and comprises an iron core, a primary coil and a secondary coil; the method is characterized in that: the iron core is a three-column iron core; the primary coil comprises an A-phase primary coil, a B-phase primary coil and a C-phase primary coil which are mutually independent; 3+2 insulation structures are added between single copper foil layers of the primary coil; the primary coil adopts an angle connection mode; the secondary coils comprise an A-phase secondary coil, a B-phase secondary coil and a C-phase secondary coil; the coil winding conductor of each phase of secondary coil is divided into 16 layers and is formed by winding 4X22 copper flat wires, and the leading-out ends and leading-in ends of the 16 sub-coils are connected with the bus bars meeting the current requirement; the secondary coil adopts a star connection mode. The utility model provides a secondary solenoid just adopts layering segmentation coiling, can improve the current-carrying capacity under the unit area, satisfies the demand of heavy current.
Description
Technical Field
The utility model belongs to the technical field of intermediate frequency transformer, especially, relate to a low-voltage heavy current intermediate frequency transformer that energy-conserving electric stove of intermediate frequency was used.
Background
As is well known, an if transformer is a specific transformer with a fixed resonant tank in a superheterodyne receiver, but the resonant tank can be trimmed within a certain range to achieve an accurate resonant frequency even after the circuit is connected, and trimming is performed by changing the relative position of a trimming capacitor or a magnetic core. The primary and secondary of the intermediate frequency transformer for electronic tube are usually tuned loop, and the transistor has two kinds of double-tuned and single-tuned.
The medium frequency energy-saving electric furnace is a power supply device for converting power frequency 50HZ alternating current into medium frequency (above 300HZ to 10000HZ), and is formed from several portions of frequency conversion device, furnace body and furnace front control. At present, the intermediate frequency transformer for the traditional intermediate frequency energy-saving electric furnace has the following defects:
due to the use of the single conductor, the current of the single conductor is limited due to the influence of the skin effect; in order to meet the requirement of large current, the volume of the product is increased;
the insulation effect per unit area is reduced due to the increase of the area of the single conductor;
because the single conductor is adopted, the heat dissipation performance is poor, local heat is concentrated, and the product is easy to damage.
SUMMERY OF THE UTILITY MODEL
To above technical defect, the utility model provides a low-voltage heavy current intermediate frequency transformer that energy-conserving electric stove of intermediate frequency used improves the current-carrying capacity under the unit area through just adopting the layering segmentation coiling with secondary solenoid.
In order to achieve the technical purpose, the utility model discloses a following technical scheme realizes:
a low-voltage large-current medium-frequency transformer for a medium-frequency energy-saving electric furnace comprises an iron core, a primary coil and a secondary coil; wherein:
the iron core is a three-column iron core;
the primary coil comprises an A-phase primary coil, a B-phase primary coil and a C-phase primary coil which are mutually independent; 3+2 insulation structures are added between single copper foil layers of the primary coil; the primary coil adopts an angle connection mode;
the secondary coils comprise an A-phase secondary coil, a B-phase secondary coil and a C-phase secondary coil; the coil winding conductor of each phase of secondary coil is divided into 16 layers and is formed by winding 4X22 copper flat wires, and the leading-out ends and leading-in ends of the 16 sub-coils are connected with the bus bars meeting the current requirement; the secondary coil adopts a star connection mode.
Preferably, the bus bar is a copper bar, and the leading-out ends and leading-in ends of the 16 branch lines are welded with the copper bar.
Preferably, the primary coil is provided with an insulating layer on the outer side.
Preferably, a screen isolating layer is arranged between the primary pole and the secondary pole of the low-voltage large-current medium-frequency transformer and is connected to the ground.
Preferably, a reinforcing insulating bar is mounted on the bus bar.
The utility model has the advantages and the technical effect be:
the utility model provides a transformer is applied to energy-conserving electric stove power supply system of intermediate frequency, and this power supply system will stable heavy current (10000A), and the iron core temperature rise of transformer is no longer than 90 degrees. Has good heat dissipation capability.
The utility model provides a transformer can satisfy the power supply system requirement, and electromagnetic compatibility is good, and external radiation disturbs for a short time. Low disturbance to the power grid.
The utility model provides a transformer adopts vertical full open form, is favorable to the heat dissipation, improves insulating properties. Is convenient for maintenance or replacement.
The utility model provides a transformer adopts three-column three-wire package form characteristics, does benefit to the heat dissipation, low, the preparation of technology cost is convenient.
Drawings
FIG. 1 is a front view of a preferred embodiment of the present invention;
fig. 2 is a right side view of the preferred embodiment of the present invention;
fig. 3 is a top view of the preferred embodiment of the present invention.
In the figure: 1. an iron core; 2. a secondary coil; 3. a bus bar; 4. reinforcing the insulating strip; 5. a primary coil.
Detailed Description
In order to make the above objects, control system and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 3, a low-voltage large-current intermediate-frequency transformer for an intermediate-frequency energy-saving electric furnace includes an iron core 1, a primary coil 5 and a secondary coil 2; wherein:
the iron core 1 is a three-column iron core;
the primary coil comprises an A-phase primary coil, a B-phase primary coil and a C-phase primary coil which are mutually independent; 3+2 insulation structures are added between the single copper foil layers; the primary coil adopts an angle connection mode;
the secondary coils comprise an A-phase secondary coil, a B-phase secondary coil and a C-phase secondary coil; the coil winding conductor of each phase of secondary coil is divided into 16 layers and is formed by winding 4X22 copper flat wires, and the leading-out ends and leading-in ends of the 16 sub-coils are connected with the bus bar 3 meeting the current requirement; the secondary coil adopts a star connection mode. A reinforcing insulating bar 4 is arranged on the bus bar;
on the basis of the preferred embodiment described above:
the bus bar is a copper bar, and the leading-out ends and leading-in ends of the 16 branch line packages are welded with the copper bar.
And an insulating layer is arranged on the outer side of the primary coil.
And a screen isolating layer is arranged between the primary pole and the secondary pole of the low-voltage large-current intermediate-frequency transformer and is connected to the ground.
The low-voltage large-current intermediate-frequency transformer is applied to a power supply system of an intermediate-frequency energy-saving electric furnace, the power supply system needs stable large current (10000A), and the temperature rise of an iron core of the transformer does not exceed 90 ℃. Has good heat dissipation capability.
The low-voltage large-current intermediate-frequency transformer can meet the requirements of a power supply system on good electromagnetic compatibility and small external radiation interference. Low disturbance to the power grid.
The low-voltage large-current intermediate-frequency transformer adopts a vertical full-open mode, is favorable for heat dissipation, and improves the insulating property. Is convenient for maintenance or replacement.
The low-voltage heavy-current intermediate-frequency transformer adopts the characteristics of a three-column three-wire package form, is favorable for heat dissipation, and has low process cost and convenient manufacture.
The primary coil of the low-voltage large-current intermediate-frequency transformer adopts a three-phase independent coil, a 3+2 insulation mode is added between single copper foil layers, A, B, C phase coils are divided, and angle connection type input is adopted.
The secondary coil of the low-voltage large-current intermediate-frequency transformer adopts a three-phase three-coil mode, each coil winding conductor is divided into 16 layers, and after the winding of a 4X22 copper flat wire is completed, the leading-out ends and leading-in ends of 16 sub-coils are respectively welded by a copper bar meeting the current requirement to form a bus bar. All 3 secondary coils were treated in the manner described above.
Three secondary coils of the low-voltage large-current intermediate-frequency transformer respectively form three output terminals a, b and c; the mode of independent input of each coil is shown in figure 1;
and after the primary and secondary coils of the low-voltage large-current medium-frequency transformer are finished, performing insulation dipping treatment to form an insulation layer on the outer wall. Drying, loading into a predetermined three-column iron core, and assembling, connecting and packaging.
The low-voltage large-current intermediate frequency transformer is characterized by comprising the following components:
the working parameters of the low-voltage large-current intermediate-frequency transformer are as follows: the input voltage range is 110V-187V; the output voltage range is 7V-31V;
(1) the single conductor of the secondary coil and the single-package process secondary adopt 16 layers, and the spacer layer is wound, and has extremely strong ventilation and heat dissipation effects.
(2) The primary coil adopts an angle connection mode, and the secondary coil adopts a star connection mode, so that the use by customers is facilitated, the balance of a power grid is facilitated, and the interference of the power grid is small.
(3) A screen isolation layer is arranged between the primary pole and the secondary pole and is connected to the ground, external radiation interference is small, and the electromagnetic compatibility requirement is met.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A low-voltage large-current medium-frequency transformer for a medium-frequency energy-saving electric furnace comprises an iron core, a primary coil and a secondary coil; the method is characterized in that:
the iron core is a three-column iron core;
the primary coil comprises an A-phase primary coil, a B-phase primary coil and a C-phase primary coil which are mutually independent; 3+2 insulation structures are added between single copper foil layers of the primary coil; the primary coil adopts an angle connection mode;
the secondary coils comprise an A-phase secondary coil, a B-phase secondary coil and a C-phase secondary coil; the coil winding conductor of each phase of secondary coil is divided into 16 layers and is formed by winding 4X22 copper flat wires, and the leading-out ends and leading-in ends of the 16 sub-coils are connected with the bus bars meeting the current requirement; the secondary coil adopts a star connection mode.
2. The low-voltage large-current intermediate-frequency transformer for the intermediate-frequency energy-saving electric furnace as claimed in claim 1, wherein: the bus bar is a copper bar, and the leading-out ends and leading-in ends of the 16 branch line packages are welded with the copper bar.
3. The low-voltage large-current intermediate-frequency transformer for the intermediate-frequency energy-saving electric furnace as claimed in claim 1, wherein: and an insulating layer is arranged on the outer side of the primary coil.
4. The low-voltage large-current intermediate-frequency transformer for the intermediate-frequency energy-saving electric furnace as claimed in claim 1, wherein: and a screen isolating layer is arranged between the primary pole and the secondary pole of the low-voltage large-current intermediate-frequency transformer and is connected to the ground.
5. The low-voltage large-current intermediate-frequency transformer for the intermediate-frequency energy-saving electric furnace as claimed in claim 1, wherein: and a reinforcing insulating strip is arranged on the bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221112143.8U CN217134170U (en) | 2022-05-10 | 2022-05-10 | Low-voltage large-current intermediate-frequency transformer for intermediate-frequency energy-saving electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221112143.8U CN217134170U (en) | 2022-05-10 | 2022-05-10 | Low-voltage large-current intermediate-frequency transformer for intermediate-frequency energy-saving electric furnace |
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| Publication Number | Publication Date |
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| CN217134170U true CN217134170U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221112143.8U Active CN217134170U (en) | 2022-05-10 | 2022-05-10 | Low-voltage large-current intermediate-frequency transformer for intermediate-frequency energy-saving electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217134170U (en) |
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- 2022-05-10 CN CN202221112143.8U patent/CN217134170U/en active Active
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