Transformer, radio frequency power amplifier circuit and radio frequency power supply system
By designing the magnetic core as a single piece and installing an insulating tube between the metal tube and the conductor, the problem of easily damaged conductors in transformers was solved, thereby improving the transformer's conversion efficiency and withstand voltage characteristics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-27
AI Technical Summary
The conductors in the secondary winding of existing transformers are prone to damage, leading to insulation failure and insufficient withstand voltage.
Design a transformer with a single-piece magnetic core. The metal tube of the primary winding passes through an insulating tube and a wire alternately. The insulating tube is located on the inner wall of the metal tube. The two ends of the wire extend out of the insulating tube and are wrapped with an insulating sleeve to improve insulation.
It improves the transformer's conversion efficiency and withstand voltage characteristics without increasing the transformer's size, and avoids insulation failure caused by conductor damage.
Smart Images
Figure CN224052999U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to radio frequency technical field especially relates to a transformer, radio frequency power amplifier circuit and radio frequency power supply system. BACKGROUND
[0002] The transformer is a device for changing AC voltage by using the principle of electromagnetic induction, and the main components are the primary winding, the secondary winding and the magnetic core. The main functions of the transformer include: voltage transformation, current transformation, impedance transformation, isolation, etc.
[0003] In the radio frequency power amplifier circuit, the design of the transformer is crucial, and the transformer can directly affect the amplification efficiency, linearity and power output of the radio frequency power amplifier circuit. The impedance ratio of the primary winding to the secondary winding of the transformer should be equal to the square of the turns ratio of the primary winding to the secondary winding, and the impedance ratio of the transformer can be changed by changing the turns ratio of the primary winding to the secondary winding.
[0004] However, the wires in the secondary winding of the existing transformer are prone to breakage, resulting in insulation failure, insufficient voltage resistance and other problems. INVENTION CONTENTS
[0005] The utility model provides a kind of transformer, radio frequency power amplifier circuit and radio frequency power supply system, can improve the conversion efficiency of transformer, also can improve the voltage resistance characteristic of transformer under the condition of not increasing the volume of transformer.
[0006] According to an aspect of the utility model, a transformer is provided, which includes a magnetic core, a first circuit board, a second circuit board, at least two insulating tubes, at least one set of primary windings and at least one set of secondary windings.
[0007] Along the length direction of the magnetic core, the first circuit board is located on one side of the magnetic core, and the second circuit board is located on the side of the magnetic core away from the first circuit board.
[0008] The primary windings include at least two metal tubes.
[0009] The magnetic core includes a first through-hole equal in number to the metal tubes in the transformer; the metal tubes correspond one-to-one to the first through-holes.
[0010] The number of insulating tubes is equal to the number of metal tubes in the transformer, and the insulating tubes correspond one-to-one to the metal tubes.
[0011] The metal tubes are located in their corresponding first through-holes, and the insulating tubes are located on the inner wall side of their corresponding metal tubes.
[0012] Each of the primary winding groups has a corresponding secondary winding group, the secondary winding group comprising wires, the wires alternatingly passing through the passages formed by the corresponding insulation tubes of the corresponding primary winding group, and both ends of the wires extending out of the insulation tubes.
[0013] Optionally, the transformer provided by the embodiment further comprises a first input conductive plate and a first output conductive plate;
[0014] The first input conductive plate and the first output conductive plate are arranged on the side of the first circuit board away from the magnetic core;
[0015] The first input conductive plate comprises a first fixed conductive plate and a first extended conductive plate connected integrally, wherein the first extended conductive plate is arranged along the length direction of the magnetic core;
[0016] The first output conductive plate comprises a second fixed conductive plate and a second extended conductive plate connected integrally, wherein the second extended conductive plate is arranged along the length direction of the magnetic core;
[0017] The first fixed conductive plate is electrically connected with one of the metal tubes in the primary winding group, and the second fixed conductive plate is electrically connected with another of the metal tubes in the primary winding group.
[0018] Optionally, the transformer provided by the embodiment further comprises a second input conductive plate;
[0019] The second input conductive plate is arranged on the side of the second circuit board away from the magnetic core;
[0020] The second input conductive plate is electrically connected with each of the metal tubes in the primary winding group;
[0021] The second input conductive plate comprises a third fixed conductive plate and a third extended conductive plate connected integrally, wherein the third extended conductive plate is arranged along the length direction of the magnetic core.
[0022] Optionally, along the length direction of the magnetic core, the length of the metal tube is greater than the length of the first through hole, and the length of the insulation tube is greater than the length of the metal tube.
[0023] Optionally, the shape of the cross section of the metal tube comprises a circular ring;
[0024] The shape of the cross section of the insulation tube is the same as the shape of the cross section of the metal tube;
[0025] The shape of the cross section of the magnetic core comprises a racetrack shape or a rectangular shape.
[0026] Optionally, the thickness of the first input conductive plate is less than the thickness of the first circuit board;
[0027] The thickness of the first output conductive plate is less than the thickness of the first circuit board;
[0028] The thickness of the second input conductive plate is less than the thickness of the second circuit board.
[0029] Optionally, the magnetic core comprises two first through holes;
[0030] The two first through holes are symmetric about the center line of the magnetic core in the length direction.
[0031] Optionally, the wire comprises an insulating sleeve and a conductor core;
[0032] The insulating sleeve is used for wrapping the conductor core;
[0033] The conductor core is used for transmitting a voltage signal.
[0034] According to another aspect of the present application, a radio frequency power amplifier circuit is provided, which comprises the transformer provided in any of the embodiments of the present application.
[0035] According to another aspect of the present application, a radio frequency power supply system is provided, which comprises the radio frequency power amplifier circuit provided in any of the embodiments of the present application.
[0036] The transformer provided in the embodiments of the present application can improve the conversion efficiency of the transformer, and can also improve the voltage resistance characteristic of the transformer without increasing the volume of the transformer.
[0037] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0039] Figure 1 is a structural schematic diagram of a transformer under a first view angle according to an embodiment of the present application;
[0040] Figure 2 is a structural schematic diagram of a transformer under a second view angle according to an embodiment of the present application;
[0041] Figure 3 is an exploded structural schematic diagram of a transformer according to an embodiment of the present application;
[0042] Figure 4 is a partial enlarged structural schematic diagram of a cross section of a transformer according to an embodiment of the present application;
[0043] Figure 5 is another structural schematic diagram of a transformer under a first view angle according to an embodiment of the present application;
[0044] Figure 6 is another structural schematic diagram of a transformer under a second view angle according to an embodiment of the present application;
[0045] Figure 7 is another exploded structural schematic diagram of a transformer according to an embodiment of the present application;
[0046] Figure 8 is another partial enlarged structural schematic diagram of a cross section of a transformer according to an embodiment of the present application. DETAILED DESCRIPTION
[0047] In order to make the person in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person in the art without creative labor should belong to the scope of protection of the present application.
[0048] It should be noted that the terms "first", "second", and the like in the description and in the claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0049] Figure 1 It is a structural schematic diagram of a transformer under a first view according to the embodiments of the utility model, Figure 2 It is a structural schematic diagram of a transformer under a second view according to the embodiments of the utility model, the first view is different from the second view, Figure 3 It is an explosion structural schematic diagram of a transformer according to the embodiments of the utility model, Figure 4 It is a sectional local enlarged structural schematic diagram of a transformer according to the embodiments of the utility model, with reference to Figures 1-4 The transformer 100 provided by the embodiments includes a magnetic core 110, a first circuit board 120, a second circuit board 130, at least two insulating tubes 140, at least one group of primary winding and at least one group of secondary winding; along the length direction X of the magnetic core 110, the first circuit board 120 is located on one side of the magnetic core 110, and the second circuit board 130 is located on the side of the magnetic core 110 away from the first circuit board 120; the primary winding includes at least two metal tubes 151; the magnetic core 110 includes a first through hole 111 equal in number to the metal tubes 151 in the transformer 100; the metal tube 151 corresponds to the first through hole 111 one by one; the number of the insulating tube 140 is equal to the number of the metal tube 151 in the transformer 100, and the insulating tube 140 corresponds to the metal tube 151 one by one; the metal tube 151 is located in the corresponding first through hole 111, and the insulating tube 140 is located on the inner wall side of the corresponding metal tube 151; each group of primary winding has a corresponding secondary winding, and the secondary winding includes a wire 161, the wire 161 alternately passes through the channel formed by the corresponding insulating tube 140 of the corresponding primary winding, and both ends of the wire 161 extend out of the insulating tube 140.
[0050] Specifically, the material of the metal tube 151 can be copper. The outer side wall of each metal tube 151 is surrounded by the magnetic core 110, and the metal tube 151 can be fixed in the first through hole 111 corresponding to the metal tube 151. The magnetic core 110 in the embodiment is a whole structure, and is not spliced by the magnetic cores corresponding to the metal tubes 151. Therefore, the magnetic core 110 in the embodiment has no gap, which can reduce magnetic leakage and improve the conversion efficiency of the transformer.
[0051] One primary winding can include two metal tubes 151 connected in series, or more than two metal tubes 151 connected in series. The material of the metal tube 151 can be copper. One group of primary windings can correspond to one group of secondary windings, or two groups or more than two groups of secondary windings. The insulating tube 140 corresponding to the primary winding includes the insulating tube 140 corresponding to each metal tube 151 in the primary winding.
[0052] The first end of each metal tube 151 can be located on the side of the first circuit board 120 away from the magnetic core 110, and the second end of each metal tube 151 can be located on the side of the second circuit board 130 away from the magnetic core 110. The first circuit board 120 can include a second through hole equal in number to the metal tubes 151, and the metal tube 151 corresponds to the second through hole one by one, and the metal tube 151 can pass through the corresponding second through hole. The second circuit board 130 includes a third through hole equal in number to the metal tubes 151, and the metal tube 151 corresponds to the third through hole one by one, and the metal tube 151 can pass through the corresponding third through hole.
[0053] The first circuit board 120 includes a first wiring area 121 and a second wiring area 122, and the first wiring area 121 and the second wiring area 122 are arranged at intervals. The first end of the first metal tube 151 in the plurality of metal tubes 151 connected in series in the primary winding is electrically connected to the first wiring area 121, and the first end of the last metal tube 151 in the plurality of metal tubes 151 connected in series is electrically connected to the second wiring area 122. The first wiring area 121 can be used for electrical connection with an external voltage input terminal, and the second wiring area 122 can be used for electrical connection with an external voltage output terminal. The second circuit board 130 includes a series conductive area 131, and the series conductive area 131 is electrically connected to the second end of each metal tube 151 to make the metal tubes 151 connected in series. The first circuit board 120 and the second circuit board 130 in the embodiment can also fix the metal tubes 151 and the insulating tubes 140.
[0054] The insulating tube 140 in the embodiment has insulation performance, is located at the inner wall side of the metal tube 151, and the wire 161 is located in the channel formed by the insulating tube 140. It can be seen that the insulating tube 140 is additionally arranged between the metal tube 151 and the wire 161. In this way, after the insulating sleeve of the wire 161 is broken, the insulating tube 140 can ensure that the wire 161 is insulated from the metal tube 151, thereby improving the voltage resistance characteristic of the transformer 100. The insulating tube 140 is located at the inner wall side of the metal tube 151, so that the voltage resistance characteristic of the transformer 100 is improved without increasing the volume of the transformer 100.
[0055] The embodiment provides a transformer. The magnetic cores around the metal tubes in the primary winding are integrally arranged rather than being arranged by splicing the magnetic cores corresponding to the metal tubes, so that the magnetic cores in the transformer are gapless, and the conversion efficiency of the transformer is improved. The insulating tube is arranged between the metal tube and the wire, so that the problem of transformer insulation failure caused by wire damage is avoided, and the insulation characteristic between the wire and the metal tube is improved, and the voltage resistance characteristic of the transformer is improved. In summary, the transformer provided in the embodiment can improve the conversion efficiency of the transformer, and can improve the voltage resistance characteristic of the transformer without increasing the volume of the transformer.
[0056] Optionally, Figure 5 is another structural schematic view of a transformer under a first visual angle according to the embodiment of the utility model, Figure 6 is another structural schematic view of a transformer under a second visual angle according to the embodiment of the utility model, Figure 7 is an exploded structural schematic view of another transformer according to the embodiment of the utility model, Figure 8 is a partial enlarged structural schematic view of a section of another transformer according to the embodiment of the utility model, with reference to Figures 5-8 The transformer 100 provided in the embodiment further includes a first input conductive plate 170 and a first output conductive plate 180. The first input conductive plate 170 and the first output conductive plate 180 are arranged at the side, away from the magnetic core 110, of the first circuit board 120. The first input conductive plate 170 includes a first fixed conductive plate 171 and a first extended conductive plate 172 which are integrally connected. The first extended conductive plate 172 is arranged along the length direction of the magnetic core 110. The first output conductive plate 180 includes a second fixed conductive plate 181 and a second extended conductive plate 182 which are integrally connected. The second extended conductive plate 182 is arranged along the length direction of the magnetic core 110. The first fixed conductive plate 171 is electrically connected with one metal tube 151 in the primary winding, and the second fixed conductive plate 181 is electrically connected with another metal tube 151 in the primary winding.
[0057] Specifically, the size of the first input conductive plate 170 can be the same as the size of the first output conductive plate 180. The material of the first input conductive plate 170 can be the same as the material of the first output conductive plate 180, and both can be copper.
[0058] The first fixed conductive plate 171 can be electrically connected with the first wiring area in the first circuit board 120, and the second fixed conductive plate 181 can be electrically connected with the second wiring area in the first circuit board 120.
[0059] The first fixed conductive plate 171, the second fixed conductive plate 181 and the first circuit board 120 can better fix the metal pipe 151 and the insulating pipe 140, so as to avoid displacement of the insulating pipe 140 during use and transportation of the transformer 100.
[0060] The first fixed conductive plate 171 is specifically electrically connected with the first metal pipe 151 in the plurality of metal pipes 151 connected in series in the primary winding, and the second fixed conductive plate 181 is specifically electrically connected with the last metal pipe 151 in the plurality of metal pipes 151 connected in series in the primary winding. It should be noted that the first fixed conductive plate 171 and the second fixed conductive plate 181 are not short-circuited.
[0061] The first extension conductive plate 172 and the second extension conductive plate 182 are arranged along the length direction of the magnetic core 110, can be electrically connected with the external voltage input end through the first extension conductive plate 172, and can be electrically connected with the external voltage output end through the second extension conductive plate 182, so as to facilitate assembly of the transformer 100 and electrical connection with external devices.
[0062] Optionally, continuing to refer to Figures 5-8 The transformer 100 provided by the embodiment further includes a second input conductive plate 190; the second input conductive plate 190 is located on the side of the second circuit board 130 away from the magnetic core 110; the second input conductive plate 190 is electrically connected with each metal pipe 151 in the primary winding; the second input conductive plate 190 includes a third fixed conductive plate 191 and a third extension conductive plate 192 connected integrally, wherein the third extension conductive plate 192 is arranged along the length direction of the magnetic core 110.
[0063] Specifically, the material of the second input conductive plate 190 can be copper. The third fixed conductive plate 191 and the second circuit board 130 can better fix the metal pipe 151 and the insulating pipe 140, so as to avoid displacement of the insulating pipe 140 during use and transportation of the transformer 100.
[0064] The second input conductive plate 190 is electrically connected with each metal pipe 151 in the primary winding, so that the plurality of metal pipes 151 in the primary winding can be connected in series. The third extension conductive plate 192 can be electrically connected with the series conductive area in the second circuit board 130.
[0065] The third extension conductive plate 192 can be electrically connected with the external DC power source end, and the third extension conductive plate 192 is arranged along the length direction of the magnetic core 110, so that the installation of the transformer 100 is facilitated and the second input conductive plate 190 is better electrically connected with the external DC power source end.
[0066] Optionally, with reference to Figures 1-8 , the length of the metal tube 151 is greater than the length of the first through hole 111 along the length direction of the magnetic core 110, and the length of the insulating tube 400 is greater than the length of the metal tube 151.
[0067] Specifically, the length of the metal tube 151 is greater than the length of the first through hole 111 along the length direction X of the magnetic core 110, so that the metal tube 151 protrudes out of the first through hole 111 and is electrically connected with the first input conductive plate 170, the first output conductive plate 180 and the second input conductive plate 190.
[0068] The length of the insulating tube 400 is greater than the length of the metal tube 151 along the length direction X of the magnetic core 110, so that the insulating tube 400 protrudes out of the two tube openings of the metal tube 151, thereby better insulating the wire 161 from the metal tube 151.
[0069] Optionally, with reference to Figures 1-8 , the cross section of the metal tube 151 is a circular ring; the cross section of the insulating tube 140 is the same as the cross section of the metal tube 151; and the cross section of the magnetic core 110 is a track shape, a rectangular shape or an elliptical shape.
[0070] Specifically, the cross section of the metal tube 151 is a circular ring, so that the metal tube 151 can be more conveniently installed into the first through hole 111. The cross section of the insulating tube 140 is the same as the cross section of the metal tube 151, so that the insulating tube 140 can be more conveniently installed to the inner wall side of the metal tube 151. The cross section of the magnetic core 110 is a track shape or a rectangular shape, so that the transformer 100 can be better placed.
[0071] Optionally, with reference to Figures 1-8 , the thickness of the first input conductive plate 170 is less than the thickness of the first circuit board 120; the thickness of the first output conductive plate 180 is less than the thickness of the first circuit board 120; and the thickness of the second input conductive plate 190 is less than the thickness of the second circuit board 130. In this way, the thicknesses of the first input conductive plate 170, the first output conductive plate 180 and the second input conductive plate 190 are not too thick, so that the working performance of the transformer 100 is not affected.
[0072] Optionally, with reference to Figures 1-8The magnetic core 110 includes two first through holes 111, which are symmetric about the center line of the magnetic core 110 along the length direction X.
[0073] Specifically, the transformer 100 in the embodiment includes the metal tube 151 and the two insulating tubes 140. The two first through holes 111 are arranged symmetric about the center line of the magnetic core 110 along the length direction X, so that the working performance of the transformer 100 can be improved.
[0074] Optionally, the wire includes an insulating sleeve and a conductor core; the insulating sleeve is used for wrapping the conductor core; the conductor core is used for transmitting a voltage signal; and the insulating sleeve is arranged in each conductor core, so that the insulation between the wire and the metal tube can be further improved.
[0075] Specifically, the material of the conductor core can include silver or copper, etc. The silver has good electrical conductivity and high corrosion resistance, so that the electrical conductivity and corrosion resistance of the wire can be improved, the temperature of the wire under high power can be reduced, and the service life of the wire can be prolonged. The copper has good electrical conductivity and low cost, so that the material of the conductor core includes the copper, and the manufacturing cost of the transformer can be reduced.
[0076] The radio frequency power amplifier circuit provided in the embodiment includes the transformer provided in any embodiment of the utility model, so that the radio frequency power amplifier circuit provided in the embodiment has the beneficial effects of the transformer provided in any embodiment of the utility model, which will not be repeated here.
[0077] The radio frequency power supply system provided in the embodiment includes the radio frequency power amplifier circuit provided in any embodiment of the utility model, so that the radio frequency power amplifier circuit provided in the embodiment has the beneficial effects of the radio frequency power amplifier circuit provided in any embodiment of the utility model, which will not be repeated here.
[0078] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the utility model can be achieved, which will not be limited herein.
[0079] The above specific embodiments do not constitute a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A transformer, characterized by The transformer comprises: a magnetic core, a first circuit board, a second circuit board, at least two insulating tubes, at least one set of primary winding and at least one set of secondary winding; along the length direction of the magnetic core, the first circuit board is located on one side of the magnetic core, and the second circuit board is located on the side of the magnetic core away from the first circuit board; the primary winding comprises at least two metal tubes; the magnetic core comprises a first through hole equal to the number of the metal tubes in the transformer; the metal tube corresponds to the first through hole one by one; the number of the insulating tubes is equal to the number of the metal tubes in the transformer, and the insulating tube corresponds to the metal tube one by one; the metal tube is located in the corresponding first through hole, and the insulating tube is located on the inner wall side of the corresponding metal tube; each set of the primary winding has a corresponding secondary winding, the secondary winding comprises a wire, the wire alternately passes through the channel formed by the corresponding insulating tube of the corresponding primary winding, and both ends of the wire extend out of the insulating tube.
2. The transformer of claim 1, wherein It further comprises a first input conductive plate and a first output conductive plate; the first input conductive plate and the first output conductive plate are arranged on the side of the first circuit board away from the magnetic core; the first input conductive plate comprises a first fixed conductive plate and a first extended conductive plate connected integrally, wherein the first extended conductive plate is arranged along the length direction of the magnetic core; the first output conductive plate comprises a second fixed conductive plate and a second extended conductive plate connected integrally, wherein the second extended conductive plate is arranged along the length direction of the magnetic core; the first fixed conductive plate is electrically connected with one of the metal tubes in the primary winding, and the second fixed conductive plate is electrically connected with another metal tube in the primary winding.
3. The transformer of claim 2, wherein, It further comprises a second input conductive plate; the second input conductive plate is located on the side of the second circuit board away from the magnetic core; the second input conductive plate is electrically connected with each of the metal tubes in the primary winding; the second input conductive plate comprises a third fixed conductive plate and a third extended conductive plate connected integrally, wherein the third extended conductive plate is arranged along the length direction of the magnetic core.
4. The transformer of claim 1, wherein along the length direction of the magnetic core, the length of the metal tube is greater than the length of the first through hole, and the length of the insulating tube is greater than the length of the metal tube.
5. The transformer of claim 1, wherein, the cross-sectional shape of the metal tube comprises a circular ring; the cross-sectional shape of the insulating tube is the same as that of the metal tube; the cross-sectional shape of the magnetic core comprises a runway shape or a rectangular shape.
6. The transformer of claim 3, wherein, the thickness of the first input conductive plate is less than the thickness of the first circuit board; the thickness of the first output conductive plate is less than the thickness of the first circuit board; the thickness of the second input conductive plate is less than the thickness of the second circuit board.
7. The transformer of claim 1, wherein the magnetic core comprises two first through holes; the two first through holes are symmetric about the center line of the magnetic core along the length direction.
8. The transformer of any of claims 1-7, wherein, the wire comprises an insulating sleeve and a conductor core; the insulating sleeve is used for wrapping the conductor core; the conductor core is used for transmitting a voltage signal.
9. A radio frequency power amplifier circuit, characterized by The transformer of any one of claims 1-8 is comprised.
10. A radio frequency power supply system characterized by, The radio frequency power amplifier circuit of claim 9 is comprised.