Large-current transformer
By inserting the primary and secondary copper sheets on separate frames in a large current transformer, the problem of insufficient safety distance between coils in existing transformers is solved, and a safer and more reliable working state and higher production efficiency are achieved.
Patent Information
- Application Number
- CN202421576862.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The safety distance between the primary coil and the secondary coil of the existing high-current transformer is insufficient, which affects the safety of the transformer's use.
A large current transformer is designed, and the primary copper sheet and the secondary copper sheet are independently embedded on the primary frame and the secondary frame respectively, so that the primary copper sheet and the secondary copper sheet are isolated from each other, increasing the safe distance and enhancing the insulation effect.
By increasing the safe distance between the primary and secondary copper sheets and strengthening the insulation effect, safety hazards are eliminated, making the work of the large current transformer safer and more reliable, while improving production efficiency and product consistency.
Smart Images
Figure CN222762771U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic components, in particular to a high-current transformer. Background Art
[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. It is mainly composed of a primary coil, an iron core, a secondary coil, etc., to achieve matching conversion of input and output current, voltage and impedance, etc., and can also achieve physical isolation between the primary and secondary.
[0003] With the development of electronic technology, power supplies have been moving towards high power density, that is, making transformers move towards higher power and larger current in a limited space. Existing high-current transformers wind the primary coil and the secondary coil on the same frame, and the safety distance between the two is insufficient, which affects the safety of the transformer.
[0004] In order to reduce the volume of the transformer, there is an existing transformer in which the skeleton is eliminated. The skeleton-less transformer directly winds the primary coil and the secondary coil on the central column of the magnetic core respectively, thereby reducing the volume of the transformer by eliminating the skeleton. However, the spacing between the primary coil and the secondary coil of the existing skeleton-less transformer is small, resulting in insufficient safety distance between the primary coil and the secondary coil, thereby affecting the safety of the transformer. Summary of the invention
[0005] In order to achieve the main purpose of the utility model, the utility model provides a high-current transformer, in which the primary copper sheet and the secondary copper sheet are independently embedded in the primary frame and the secondary frame respectively, so that the primary copper sheet and the secondary copper sheet are isolated from each other, the safety distance between the primary copper sheet and the secondary copper sheet is increased, and the insulation effect is enhanced, and potential safety hazards are eliminated, so that the operation of the high-current transformer is safer and more reliable. At the same time, the plug-in installation of the high-current transformer is convenient and efficient, thereby improving production efficiency and having good product consistency.
[0006] In order to achieve the main purpose of the utility model, the utility model provides a large current transformer, including a magnetic core, the magnetic core includes a first magnetic plate, a second magnetic plate, two magnetic arms and a magnetic column, the large current transformer also includes a primary copper sheet, a primary skeleton, a secondary copper sheet, a secondary skeleton and an insulating plate, the primary skeleton is arranged on the insulating plate, and the primary skeleton includes a first baffle, a second baffle and a sleeve, the sleeve is connected between the first baffle and the second baffle, and an accommodating cavity is opened through the first baffle, the sleeve and the second baffle, the first magnetic plate is located on the outer side of the first baffle, the second magnetic plate is located on the outer side of the second baffle, the magnetic column is located in the accommodating cavity and connected between the first magnetic plate and the second magnetic plate, the outer periphery of the sleeve is wrapped with at least one first insulating layer, the primary copper sheet The sheet is wound around the outer periphery of the first insulating layer, and the first primary copper sheet end of the primary copper sheet passes through the first baffle and the insulating plate setting, the second primary copper sheet end of the primary copper sheet passes through the second baffle and the insulating plate setting, at least one second insulating layer is wound around the outer periphery of the primary copper sheet, the secondary skeleton is in an inverted U shape and is sleeved on the outside of the second insulating layer and is located between the first baffle and the second baffle, the secondary copper sheet is in an inverted U shape and is embedded in the secondary skeleton to fit the secondary skeleton, and the first secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate setting, the second secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate setting, and the two magnetic arms are respectively located on both sides of the secondary skeleton in the radial direction of the accommodating cavity and are connected between the first magnetic plate and the second magnetic plate.
[0007] It can be seen from the above scheme that the primary and secondary of the utility model high current transformer both use copper sheets as conductors. The copper sheets have good conductivity and high unit current density. Under the same cross-sectional area as round copper wire, the current carrying capacity per unit area of the conductor can be increased to reach the current value that round copper wire cannot reach, and a larger output current can be satisfied to achieve high power. In addition, the primary copper sheet of the utility model high current transformer is wound on the sleeve of the primary skeleton, and the secondary copper sheet is in an inverted U shape and is embedded in the secondary skeleton in an adaptive manner with the secondary skeleton, so that the primary copper sheet and the secondary copper sheet are independently embedded in the primary skeleton and the secondary skeleton respectively, so that the primary copper sheet and the secondary copper sheet are isolated from each other, which increases the safety distance between the primary copper sheet and the secondary copper sheet, and strengthens the insulation effect, eliminates safety hazards, and makes the operation of the high current transformer safer and more reliable. At the same time, the first primary copper sheet end of the primary copper sheet of the utility model high current transformer passes through the first baffle and the insulating plate, the second primary copper sheet end of the primary copper sheet passes through the second baffle and the insulating plate, and the first secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate, and the second secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate, further enhancing the insulation effect. In addition, compared with the multi-strand wire pins that are easy to skew and cannot be accurately positioned, resulting in difficulty in plug-in and low production efficiency, the first primary copper sheet end and the second primary copper sheet end of the primary copper sheet of the utility model high current transformer are both copper sheet pins, and the first secondary copper sheet end and the second secondary copper sheet end of the secondary copper sheet are also copper sheet pins. The copper sheet pins have a simple structure and can accurately position the plug-in installation, making the plug-in installation convenient and efficient, thereby improving production efficiency and having good product consistency.
[0008] A further solution is that a first heat dissipation groove is provided on the upper end face of the first baffle plate, the first heat dissipation groove is arranged to penetrate the accommodating cavity in the axial direction, and the primary copper sheet is arranged to protrude from the bottom end face of the first heat dissipation groove in the radial direction of the accommodating cavity; and / or a second heat dissipation groove is provided on the upper end face of the second baffle plate, the second heat dissipation groove is arranged to penetrate the accommodating cavity in the axial direction, and the primary copper sheet is arranged to protrude from the bottom end face of the second heat dissipation groove in the radial direction of the accommodating cavity.
[0009] A further solution is that the lower end of the first baffle is provided with two third heat dissipation grooves arranged side by side in the axial direction of the accommodating cavity, the third heat dissipation groove is arranged corresponding to the primary copper sheet, and the first primary copper sheet end of the primary copper sheet passes through the first baffle from a third heat dissipation groove; and / or the lower end of the second baffle is provided with two fourth heat dissipation grooves arranged side by side in the axial direction of the accommodating cavity, the fourth heat dissipation groove is arranged corresponding to the primary copper sheet, and the second primary copper sheet end of the primary copper sheet passes through the second baffle from a fourth heat dissipation groove.
[0010] A further solution is that an embedded groove is provided on the top surface of the connecting plate of the secondary skeleton, a first through groove is provided through the first arm plate of the secondary skeleton, a second through groove is provided through the second arm plate of the secondary skeleton, the connecting arm plate of the secondary copper sheet is located in the embedded groove, the first arm plate of the secondary copper sheet is arranged through the first through groove, and the second arm plate of the secondary copper sheet is arranged through the second through groove.
[0011] A further solution is that a first positioning column is protrudingly provided on the first end face of the secondary skeleton in the axial direction of the accommodating cavity, and a first positioning groove is penetrated through the first baffle plate in the axial direction of the accommodating cavity, and the first positioning column is located in the first positioning groove; and / or a second positioning column is protrudingly provided on the second end face of the secondary skeleton in the axial direction of the accommodating cavity, and a second positioning groove is penetrated through the second baffle plate in the axial direction of the accommodating cavity, and the second positioning column is located in the second positioning groove.
[0012] A further solution is that a first limiting groove is formed on the outer side surface of the first baffle plate, and the first magnetic plate is located in the first limiting groove; and / or a second limiting groove is formed on the outer side surface of the second baffle plate, and the second magnetic plate is located in the second limiting groove.
[0013] A further solution is that the number of secondary copper sheets is two, and the two secondary copper sheets are arranged on the secondary skeleton and the insulating plate at intervals in the axial direction of the accommodating cavity; and / or the number of magnetic cores is two, and the two magnetic cores are arranged adjacent to each other side by side in the radial direction of the accommodating cavity, and the magnetic columns of the two magnetic cores are located in the accommodating cavity.
[0014] A further solution is that the second insulating layer is wrapped around the periphery of the primary copper sheet in a corrugated shape; and / or the insulating board is an insulating fiberboard; and / or at least one third insulating layer is wrapped around the outer sides of the first magnetic board, the second magnetic board, and the two magnetic arms.
[0015] A further solution is that a first clip is protrudingly provided on the lower end surface of the first baffle, a first mounting groove is formed through the insulating plate, and the first clip passes through the first mounting groove and is buckled on the mounting surface of the insulating plate; and / or a second clip is protrudingly provided on the lower end surface of the second baffle, a second mounting groove is formed through the insulating plate, and the second clip passes through the second mounting groove and is buckled on the mounting surface of the insulating plate; and / or a third positioning column is protrudingly provided on the mounting surface of the insulating plate; and / or a first support bar is protrudingly provided on the lower end of the first side of the first baffle in the radial direction of the accommodating cavity, and the second baffle A second support bar is protruding from the lower end of the first side in the radial direction of the accommodating cavity, a first support plate is protruding from the first end of the secondary skeleton in the radial direction of the accommodating cavity, and the first support plate is arranged on the first support bar and the second support bar; and / or, a third support bar is protruding from the lower end of the second side in the radial direction of the accommodating cavity of the first baffle plate, a fourth support bar is protruding from the lower end of the second side in the radial direction of the accommodating cavity of the second baffle plate, a second support plate is protruding from the second end of the secondary skeleton in the radial direction of the accommodating cavity, and the second support plate is arranged on the third support bar and the fourth support bar.
[0016] A further solution is that the primary skeleton includes a first skeleton and a second skeleton, the first skeleton includes a first ring sleeve and a first baffle plate arranged at an axial end of the first ring sleeve, the second skeleton includes a second ring sleeve and a second baffle plate arranged at an axial end of the second ring sleeve, the second ring sleeve is arranged on the outer periphery of the first ring sleeve and forms a sleeve with the first ring sleeve, an accommodating cavity is formed between the first baffle plate, the axial hole of the first ring sleeve and the second baffle plate, and the first insulating layer is wrapped around the outer periphery of the second ring sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural diagram from the first perspective of an embodiment of the high-current transformer of the utility model.
[0018] Figure 2 This is a structural diagram from a second viewing angle of an embodiment of the high current transformer of the utility model.
[0019] Figure 3 It is a cross-sectional view from a first viewing angle of an embodiment of the high-current transformer of the utility model.
[0020] Figure 4 It is a cross-sectional view from a second viewing angle of an embodiment of the high-current transformer of the utility model.
[0021] Figure 5 It is a cross-sectional view from a third viewing angle of an embodiment of the high-current transformer of the utility model.
[0022] Figure 6 This is the first partial exploded view of the embodiment of the high current transformer of the utility model.
[0023] Figure 7 This is a second partial exploded view of an embodiment of the high current transformer of the utility model.
[0024] Figure 8 It is a structural diagram of an insulating plate in an embodiment of a large current transformer of the utility model.
[0025] Fig. 9 It is a third partial exploded view of an embodiment of the high current transformer of the utility model.
[0026] Fig.10 It is a structural diagram of the first skeleton in the embodiment of the high current transformer of the utility model.
[0027] Fig.11 It is a structural diagram of the second skeleton in the embodiment of the high current transformer of the utility model.
[0028] Fig.12 It is a structural diagram of the secondary skeleton in the embodiment of the utility model of the high current transformer.
[0029] Fig.13It is a cross-sectional view of the secondary skeleton in the embodiment of the high current transformer of the utility model.
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION
[0031] See also Figures 1 to 13 The present embodiment discloses a high current transformer 10, comprising a magnetic core 18, a primary copper sheet 16, a primary skeleton, a secondary copper sheet 15, a secondary skeleton 14 and an insulating plate 12, wherein the magnetic core 18 comprises a first magnetic plate 181, a second magnetic plate 182, two magnetic arms 184 and a magnetic column 183. In the present embodiment, the primary skeleton is disposed on the insulating plate 12, and the primary skeleton comprises a first baffle 131, a second baffle 132 and a sleeve, the sleeve is connected between the first baffle 131 and the second baffle 132, and an accommodating cavity 130 is provided through the first baffle 131, the sleeve and the second baffle 132, the first magnetic plate 181 is located on the outer surface of the first baffle 131, the second magnetic plate 182 is located on the outer surface of the second baffle 132, and the magnetic column 183 is located in the accommodating cavity 130 and connected between the first magnetic plate 181 and the second magnetic plate 182. At the same time, the outer periphery of the sleeve of this embodiment is wrapped with at least one first insulating layer 171, the primary copper sheet 16 is wrapped around the outer periphery of the first insulating layer 171, and the first primary copper sheet end 161 of the primary copper sheet 16 passes through the first baffle 131 and passes through the insulating plate 12, the second primary copper sheet end 162 of the primary copper sheet 16 passes through the second baffle 132 and passes through the insulating plate 12, and the outer periphery of the primary copper sheet 16 is wrapped with at least one second insulating layer 172. In addition, in this embodiment, the secondary skeleton 14 is in an inverted U-shape and is sleeved on the outside of the second insulating layer 172 and is located between the first baffle 131 and the second baffle 132. The secondary copper sheet 15 is in an inverted U-shape and is embedded in the secondary skeleton 14 to fit the secondary skeleton 14. The first secondary copper sheet end 151 of the secondary copper sheet 15 passes through the secondary skeleton 14 and the insulating plate 12, and the second secondary copper sheet end 152 of the secondary copper sheet 15 passes through the secondary skeleton 14 and the insulating plate 12. The two magnetic arms 184 are respectively located on both sides of the secondary skeleton 14 in the radial direction of the accommodating cavity 130 and are connected between the first magnetic plate 181 and the second magnetic plate 182.
[0032] The primary and secondary of the high current transformer 10 of this embodiment both use copper sheets as conductors. The copper sheets have good conductivity and high unit current density. Under the same cross-sectional area as the round copper wire, the current carrying capacity per unit area of the conductor can be increased to reach a current value that the round copper wire cannot reach, and a larger output current can be satisfied to achieve high power. In addition, the primary copper sheet 16 of the high current transformer 10 of this embodiment is wound on the sleeve of the primary skeleton, and the secondary copper sheet 15 is in an inverted U shape and is embedded in the secondary skeleton 14 in an adaptive manner, so that the primary copper sheet 16 and the secondary copper sheet 15 are independently embedded in the primary skeleton and the secondary skeleton 14, respectively, so that the primary copper sheet 16 and the secondary copper sheet 15 are isolated from each other, thereby increasing the safety distance between the primary copper sheet 16 and the secondary copper sheet 15, and strengthening the insulation effect, eliminating safety hazards, and making the operation of the high current transformer 10 safer and more reliable. At the same time, the first primary copper sheet end 161 of the primary copper sheet 16 of the high current transformer 10 of the present embodiment passes through the first baffle 131 and passes through the insulating plate 12, the second primary copper sheet end 162 of the primary copper sheet 16 passes through the second baffle 132 and passes through the insulating plate 12, and the first secondary copper sheet end 151 of the secondary copper sheet 15 passes through the secondary frame 14 and passes through the insulating plate 12, and the second secondary copper sheet end 152 of the secondary copper sheet 15 passes through the secondary frame 14 and passes through the insulating plate 12, so as to further enhance the insulation effect. In addition, compared with multi-strand wires that are easy to skew as pins and cannot be accurately positioned, resulting in difficulty in plug-in and low production efficiency, the first primary copper sheet end 161 and the second primary copper sheet end 162 of the primary copper sheet 16 of the high-current transformer 10 of this embodiment are both copper sheet pins, and the first secondary copper sheet end 151 and the second secondary copper sheet end 152 of the secondary copper sheet 15 are also copper sheet pins. The copper sheet pins have a simple structure and can accurately position the plug-in installation, making the plug-in installation convenient and efficient, thereby improving production efficiency and achieving good product consistency.
[0033] Specifically, the number of the secondary copper sheets 15 of this embodiment is two, and the two secondary copper sheets 15 are arranged on the secondary skeleton 14 and the insulating plate 12 at intervals in the axial direction of the accommodating cavity 130, and the number of the magnetic cores 18 of this embodiment is two, and the two magnetic cores 18 are arranged adjacently and side by side in the radial direction of the accommodating cavity 130, and the magnetic columns 183 of the two magnetic cores 18 are located in the accommodating cavity 130. The high-current transformer 10 of this embodiment adopts a double magnetic core 18 stacking method, and the cross-sectional area is doubled, thereby increasing the power density of the transformer 10, and realizing high power and high current. Due to the increase in the cross-sectional area, the turns ratio is correspondingly reduced, and the winding can save more materials, saving costs while better meeting performance requirements, and the double magnetic core 18 stacking method can reduce the generation of leakage inductance and residual magnetism, thereby also reducing losses.
[0034] Furthermore, in this embodiment, the secondary copper sheet 15 is a "U"-shaped copper sheet with a thickness of 12 mmW and 2.0 mmT. The first insulating layer 171 and the second insulating layer 172 are both 0.38 mm thick NOMEX insulating paper, which has high temperature resistance, high voltage resistance, and good mechanical and flame retardant properties.
[0035] In order to further improve the heat dissipation effect, the second insulating layer 172 of this embodiment is wound around the outer periphery of the primary copper sheet 16 in a corrugated shape. The second insulating layer 172 is processed into a corrugated shape. The corrugated shape not only has good ventilation and fast heat dissipation, but also has an insulating protection effect. Specifically, the insulating plate 12 of this embodiment is an insulating fiberboard, and the outer side surfaces of the first magnetic plate 181, the second magnetic plate 182, and the two magnetic arms 184 of this embodiment are wrapped with at least one third insulating layer 11, which further improves the insulating protection effect.
[0036] In order to further improve the heat dissipation effect, a first heat dissipation groove 1317 is provided on the upper end surface of the first baffle 131 of the present embodiment, and the first heat dissipation groove 1317 is arranged to penetrate the accommodating cavity 130 in the axial direction, and the primary copper sheet 16 is arranged on the groove bottom end surface of the first heat dissipation groove 1317 protruding in the radial direction of the accommodating cavity 130, and a second heat dissipation groove 1327 is provided on the upper end surface of the second baffle 132 of the present embodiment, and the second heat dissipation groove 1327 is arranged to penetrate the axial direction of the accommodating cavity 130, and the primary copper sheet 16 is arranged on the groove bottom end surface of the second heat dissipation groove 1327 protruding in the radial direction of the accommodating cavity 130, thereby forming air convection on both sides of the upper end of the primary copper sheet 16, which can allow air to enter the interior of the transformer 10 and take away heat, thereby avoiding damage caused by excessive heat in the transformer 10, increasing the service life of the transformer 10, and reducing safety hazards. At the same time, the lower end of the first baffle 131 of the present embodiment is provided with two third heat dissipation grooves 1311 arranged side by side in the axial direction of the accommodating cavity 130, the third heat dissipation groove 1311 is arranged corresponding to the primary copper sheet 16, and the first primary copper sheet end 161 of the primary copper sheet 16 passes through the first baffle 131 from a third heat dissipation groove 1311, and the lower end of the second baffle 132 of the present embodiment is provided with two fourth heat dissipation grooves 1321 arranged side by side in the axial direction of the accommodating cavity 130, the fourth heat dissipation groove 1321 is arranged corresponding to the primary copper sheet 16, and the second primary copper sheet end 162 of the primary copper sheet 16 passes through the second baffle 132 from a fourth heat dissipation groove 1321, thereby forming air convection on two opposite sides of the lower end of the primary copper sheet 16, so that air can enter the interior of the transformer 10 and take away heat, thereby avoiding damage caused by excessive heat in the transformer 10, increasing the service life of the transformer 10, and reducing safety hazards.
[0037] In order to improve the convenience of production and assembly and to improve production efficiency, an embedded groove 145 is provided on the top surface of the connecting plate of the secondary skeleton 14 of the present embodiment, a first through groove 146 is provided through the first arm plate of the secondary skeleton 14, a second through groove 147 is provided through the second arm plate of the secondary skeleton 14, a connecting arm plate 154 of the secondary copper sheet 15 is located in the embedded groove 145, the first arm plate 153 of the secondary copper sheet 15 is arranged through the first through groove 146, and the second arm plate 155 of the secondary copper sheet 15 is arranged through the second through groove 147, so that the inverted U-shaped secondary copper sheet 15 can be quickly inserted into the inverted U-shaped groove formed by the first through groove 146, the embedded groove 145 and the second through groove 147 of the secondary skeleton 14, and the production and assembly are convenient and efficient.
[0038] Among them, in this embodiment, the secondary skeleton 14 is provided with a first positioning column 141 protruding from the first end face in the axial direction of the accommodating cavity 130, the first baffle plate 131 is provided with a first positioning groove 1318 penetrating the accommodating cavity 130 in the axial direction, and the first positioning column 141 is located in the first positioning groove 1318, and the secondary skeleton 14 is provided with a second positioning column 142 protruding from the second end face in the axial direction of the accommodating cavity 130 in this embodiment, the second baffle plate 132 is provided with a second positioning groove 1328 penetrating the accommodating cavity 130 in the axial direction, and the second positioning column 142 is located in the second positioning groove 1328, so that the secondary skeleton 14 is stably restricted and fixed between the first baffle plate 131 and the second baffle plate 132.
[0039] In addition, in the present embodiment, a first limiting groove 1316 is formed on the outer side surface of the first baffle plate 131, and the first magnetic plate 181 is located in the first limiting groove 1316, so that the first magnetic plate 181 is stably restricted and fixed in the first limiting groove 1316 of the first baffle plate 131, and a second limiting groove 1326 is formed on the outer side surface of the second baffle plate 132 of the present embodiment, and the second magnetic plate 182 is located in the second limiting groove 1326, so that the second magnetic plate 182 is stably restricted and fixed in the second limiting groove 1326 of the second baffle plate 132.
[0040] In addition, in this embodiment, the lower end surface of the first baffle 131 is protrudingly provided with a first buckle 1312, the insulating plate 12 is provided with a first mounting groove 121, and the first buckle 1312 passes through the first mounting groove 121 and is buckled on the mounting surface of the insulating plate 12, and the lower end surface of the second baffle 132 is protrudingly provided with a second buckle 1322, the insulating plate 12 is provided with a second mounting groove 122, and the second buckle 1322 passes through the second mounting groove 122 and is buckled on the mounting surface of the insulating plate 12, so that the primary frame is stably connected to the insulating plate 12. In addition, in this embodiment, the mounting surface of the insulating plate 12 is protrudingly provided with a third positioning column 123, and the third positioning column 123 is used for positioning on the circuit board, thereby improving the accuracy of the plug-in. Specifically, in this embodiment, the first baffle 131 is provided with a first support bar 1314 protruding from the lower end of the first side in the radial direction of the accommodating cavity 130, and the second baffle 132 is provided with a second support bar 1324 protruding from the lower end of the first side in the radial direction of the accommodating cavity 130. The first end of the secondary skeleton 14 is provided with a first support plate 143 protruding from the lower end of the radial direction of the accommodating cavity 130, and the first support plate 143 is arranged on the first support bar 1314 and the second support bar 1324. In this embodiment, the first baffle 131 is provided with a third support bar protruding from the lower end of the second side in the radial direction of the accommodating cavity 130, and the second baffle 132 is provided with a fourth support bar 1325 protruding from the lower end of the second side in the radial direction of the accommodating cavity 130. The second end of the secondary skeleton 14 is provided with a second support plate 144 protruding from the lower end of the radial direction of the accommodating cavity 130, and the second support plate 144 is arranged on the third support bar and the fourth support bar 1325.
[0041] In addition, the primary skeleton of the present embodiment includes a first skeleton and a second skeleton, the first skeleton includes a first ring sleeve 1313 and a first baffle 131 arranged at an axial end of the first ring sleeve 1313, the second skeleton includes a second ring sleeve 1323 and a second baffle 132 arranged at an axial end of the second ring sleeve 1323, the second ring sleeve 1323 is sleeved on the outer periphery of the first ring sleeve 1313 and forms a sleeve with the first ring sleeve 1313, an accommodating cavity 130 is formed between the opening of the first baffle 131, the axial hole of the first ring sleeve 1313 and the opening of the second baffle 132, the first insulating layer 171 is wrapped around the outer periphery of the second ring sleeve 1323, so that the production and assembly are more convenient and efficient.
[0042] The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles of the present invention should be included in the scope of the present invention patent application.
Claims
1. A high current transformer, comprising a magnetic core, wherein the magnetic core comprises a first magnetic plate, a second magnetic plate, two magnetic arms and a magnetic column, characterized in that: The high-current transformer further includes a primary copper sheet, a primary frame, a secondary copper sheet, a secondary frame and an insulating plate, wherein the primary frame is arranged on the insulating plate, and the primary frame includes a first baffle, a second baffle and a sleeve, wherein the sleeve is connected between the first baffle and the second baffle, and an accommodating cavity is provided through the first baffle, the sleeve and the second baffle, wherein the first magnetic plate is located on the outer side of the first baffle, the second magnetic plate is located on the outer side of the second baffle, and the magnetic column is located in the accommodating cavity and connected between the first magnetic plate and the second magnetic plate; The outer circumference of the sleeve is wound with at least one first insulating layer, the primary copper sheet is wound around the outer circumference of the first insulating layer, and the first primary copper sheet end of the primary copper sheet passes through the first baffle and the insulating plate, the second primary copper sheet end of the primary copper sheet passes through the second baffle and the insulating plate, and the outer circumference of the primary copper sheet is wound with at least one second insulating layer; The secondary skeleton is in an inverted U shape and is sleeved on the outside of the second insulating layer and is located between the first baffle plate and the second baffle plate. The secondary copper sheet is in an inverted U shape and is embedded in the secondary skeleton to fit the secondary skeleton. The first secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate, and the second secondary copper sheet end of the secondary copper sheet passes through the secondary skeleton and the insulating plate. The two magnetic arms are respectively located on both sides of the secondary skeleton in the radial direction of the accommodating cavity and are connected between the first magnetic plate and the second magnetic plate.
2. The high current transformer according to claim 1, characterized in that: The upper end surface of the first baffle is provided with a first heat dissipation groove, the first heat dissipation groove is arranged to penetrate the accommodating cavity in the axial direction, and the primary copper sheet is arranged to protrude from the groove bottom end surface of the first heat dissipation groove in the radial direction of the accommodating cavity; And / or, a second heat dissipation groove is formed on the upper end surface of the second baffle, the second heat dissipation groove is arranged to penetrate the accommodating cavity in the axial direction, and the primary copper sheet is arranged to protrude from the bottom end surface of the second heat dissipation groove in the radial direction of the accommodating cavity.
3. The high current transformer according to claim 1, characterized in that: The lower end of the first baffle is provided with two third heat dissipation grooves arranged side by side in the axial direction of the accommodation cavity, the third heat dissipation grooves are arranged corresponding to the primary copper sheet, and the first primary copper sheet end of the primary copper sheet passes through the first baffle from one of the third heat dissipation grooves; And / or, the lower end of the second baffle is penetrated by two fourth heat dissipation grooves arranged side by side in the axial direction of the accommodating cavity, the fourth heat dissipation grooves are arranged corresponding to the primary copper sheet, and the second primary copper sheet end of the primary copper sheet passes through the second baffle from one of the fourth heat dissipation grooves.
4. The high current transformer according to claim 1, characterized in that: The top surface of the connecting plate of the secondary frame is provided with an embedded groove, the first arm plate of the secondary frame is provided with a first through groove, and the second arm plate of the secondary frame is provided with a second through groove; The connecting arm piece of the secondary copper sheet is located in the embedded groove, the first arm piece of the secondary copper sheet is arranged through the first through groove, and the second arm piece of the secondary copper sheet is arranged through the second through groove.
5. The high current transformer according to claim 1, characterized in that: The secondary frame is provided with a first positioning column protruding from a first end surface in the axial direction of the accommodating cavity, the first baffle is provided with a first positioning groove penetrating through the axial direction of the accommodating cavity, and the first positioning column is located in the first positioning groove; And / or, a second positioning column is protrudingly provided on a second end face of the secondary skeleton in the axial direction of the accommodating cavity, a second positioning groove is formed through the second baffle in the axial direction of the accommodating cavity, and the second positioning column is located in the second positioning groove.
6. The high current transformer according to claim 1, characterized in that: A first limiting groove is formed on the outer side surface of the first baffle, and the first magnetic plate is located in the first limiting groove; And / or, a second limiting groove is formed on the outer side surface of the second baffle, and the second magnetic plate is located in the second limiting groove.
7. The high current transformer according to claim 1, characterized in that: The number of the secondary copper sheets is two, and the two secondary copper sheets are arranged on the secondary frame and the insulating plate at intervals in the axial direction of the accommodating cavity; And / or, the number of the magnetic cores is two, the two magnetic cores are adjacently arranged side by side in the radial direction of the accommodating cavity, and the magnetic columns of the two magnetic cores are located in the accommodating cavity.
8. The high current transformer according to claim 1, characterized in that: The second insulating layer is wrapped around the outer circumference of the primary copper sheet in a corrugated shape; And / or, the insulating board is an insulating fiberboard; And / or, the outer side surfaces of the first magnetic plate, the second magnetic plate, and the two magnetic arms are wrapped with at least one third insulating layer.
9. The high current transformer according to claim 1, characterized in that: A first buckle is protruding from the lower end surface of the first baffle, a first mounting groove is formed through the insulating plate, and the first buckle passes through the first mounting groove and is buckled on the mounting surface of the insulating plate; And / or, a second buckle is protrudingly provided on the lower end surface of the second baffle, a second mounting groove is formed through the insulating plate, and the second buckle passes through the second mounting groove and is buckled on the mounting surface of the insulating plate; And / or, a third positioning column is protrudingly provided on the mounting surface of the insulating plate; And / or, the first baffle is provided with a first support bar protruding from a lower end of a first side in the radial direction of the accommodating cavity, the second baffle is provided with a second support bar protruding from a lower end of a first side in the radial direction of the accommodating cavity, the first end of the secondary skeleton is provided with a first support plate protruding from a radial direction of the accommodating cavity, and the first support plate is provided on the first support bar and the second support bar; And / or, the first baffle plate is provided with a third support bar protruding from the lower end of the second side in the radial direction of the accommodating cavity, the second baffle plate is provided with a fourth support bar protruding from the lower end of the second side in the radial direction of the accommodating cavity, the second end of the secondary skeleton is provided with a second support plate protruding from the radial direction of the accommodating cavity, and the second support plate is arranged on the third support bar and the fourth support bar.
10. The high current transformer according to any one of claims 1 to 9, characterized in that: The primary skeleton comprises a first skeleton and a second skeleton, the first skeleton comprises a first ring sleeve and the first baffle plate arranged at one axial end of the first ring sleeve, and the second skeleton comprises a second ring sleeve and the second baffle plate arranged at one axial end of the second ring sleeve; The second ring sleeve is arranged on the outer circumference of the first ring sleeve and forms the sleeve with the first ring sleeve. The accommodating cavity is formed between the first baffle plate, the axial hole of the first ring sleeve and the second baffle plate. The first insulating layer is wound around the outer circumference of the second ring sleeve.