Power conversion circuit and power converter
By adding a magnetic ring assembly to the coaxial line to form multiple coaxial power circuits and impedance transformation sub-circuits, the problem that coaxial transformers cannot decompose power in power combiners is solved, achieving more efficient power conversion and wider frequency adaptability.
Patent Information
- Application Number
- CN202520500005.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing coaxial transformers in power combiners have the problem that symmetrical combiners cannot decompose power, and traditional combiners are insufficient in terms of frequency adaptability and circuit compactness.
By adding a magnetic ring assembly to the coaxial line, multiple coaxial line power circuits and impedance transformation sub-circuits can be formed. The magnetic ring suppresses the common-mode current, shortens the effective length of the coaxial line, and improves the circuit compactness and performance stability.
It effectively reduces energy loss, improves power conversion efficiency, expands the application range of circuits, adapts to complex power conversion scenarios with multiple frequencies, and provides more options.
Smart Images
Figure CN223967795U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of power conversion technology, and in particular to a power conversion circuit and a power converter. Background Technology
[0002] A coaxial transformer can be constructed by fitting a magnetic ring or tube onto the outer conductor of a coaxial line. Because the magnetic ring suppresses common-mode current (current flowing in the same phase and direction on the transmission line), it not only shortens the effective length of the coaxial line, but also offers several advantages: 1. It can operate at lower frequencies; 2. It has a wider operating frequency range; 3. It has a simple structure and is easy to implement; 4. It can handle high power. These advantages allow coaxial lines to be used in various applications, such as power combiners. Power combiners are typically two-way, four-way, or eight-way combiners. Two-way combiners are easier to implement due to their symmetry. However, symmetrical combiners usually provide a more specific power conversion, such as combining equal power to obtain higher power or decomposing high power into multiple equal low power values. Utility Model Content
[0003] The purpose of this invention is to provide a power conversion circuit and a power converter. By adding a magnetic ring to the coaxial line to shorten the effective length of the coaxial line, the compactness and performance stability of the circuit are improved. At the same time, the problems of symmetrical synthesizers are solved, which can make up for the power that symmetrical synthesizers cannot decompose. This allows for more choices in power conversion and enables the conversion of complex power conversion scenarios that are suitable for multiple frequencies.
[0004] To achieve the above objectives, a first aspect of this disclosure provides a power conversion circuit, the power conversion circuit comprising:
[0005] Power conversion sub-circuit and impedance transformation sub-circuit;
[0006] The power conversion sub-circuit includes multiple coaxial power circuits;
[0007] Both the coaxial power circuit and the impedance transformation sub-circuit include multiple coaxial magnetic ring components.
[0008] Each of the coaxial power circuits is configured as an external input / output terminal of a first side of the power conversion circuit. The first terminal formed by connecting multiple coaxial magnetic ring components in the power conversion sub-circuit is connected to the second terminal formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit.
[0009] The third terminal formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit constitutes the external input / output terminal of the second side of the power conversion circuit.
[0010] In one possible implementation, the coaxial power circuit includes a first coaxial magnetic ring assembly Co1 and a resistor R1, wherein the first end of the inner conductor of the first coaxial magnetic ring assembly Co1 in all of the coaxial power circuits in the power conversion sub-circuit is respectively configured as the first end of the coaxial power circuit;
[0011] The second end of the inner conductor of the first coaxial magnetic ring assembly Co1 in the aforementioned coaxial power circuit is connected to the first end of the resistor R1 in this coaxial power circuit and the first end of the outer conductor of the first coaxial magnetic ring assembly Co1 in the latter coaxial power circuit.
[0012] The second end of the outer conductor in the first coaxial power circuit in the power conversion sub-circuit is connected to the second end of the inner conductor in the last coaxial power circuit in the power conversion sub-circuit and the first end of the resistor R1 in the last coaxial power circuit.
[0013] The first end of the outer conductor of the first coaxial magnetic ring assembly Co1 in all the coaxial power circuits in the power conversion sub-circuit is connected and then constructed as the first end formed by the connection of multiple coaxial magnetic ring assemblies in the power conversion sub-circuit. The second end of the resistor R1 in all the coaxial power circuits in the power conversion sub-circuit is connected.
[0014] In one possible implementation, the number of the first coaxial magnetic ring assembly Co1 is three.
[0015] In one possible implementation, the coaxial line impedance in the first coaxial line magnetic ring assembly Co1 is 50 ohms, and the relative permeability of the magnetic ring in the first coaxial line magnetic ring assembly Co1 is 100.
[0016] In one possible implementation, the resistor R1 is 18 ohms.
[0017] In one possible implementation, the impedance transformation sub-circuit includes four second coaxial magnetic ring assemblies Co2;
[0018] The first ends of the inner conductors in the first, second, and fourth second coaxial magnetic ring assemblies Co2 in the impedance transformation sub-circuit are connected and then constructed as the second ends formed by the connection of multiple coaxial lines in the impedance transformation sub-circuit.
[0019] The second ends of the inner conductors in the first and third second coaxial magnetic ring components Co2 in the impedance transformation sub-circuit are connected and then constructed as the external input / output terminals of the second side of the power conversion circuit.
[0020] In the impedance transformation sub-circuit, the second end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the second end of the inner conductor in the second second coaxial magnetic ring assembly Co2. After the first end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the second second coaxial magnetic ring assembly Co2, it is connected to the first end of the inner conductor in the third second coaxial magnetic ring assembly Co2.
[0021] After the second end of the outer conductor in the second second coaxial magnetic ring assembly Co2 is connected to the second end of the outer conductor in the third second coaxial magnetic ring assembly Co2, it is connected to the second end of the inner conductor in the fourth second coaxial magnetic ring assembly Co2.
[0022] The first end of the outer conductor in the third second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the fourth second coaxial magnetic ring assembly Co2, and both ends of the outer conductor in the fourth second coaxial magnetic ring assembly Co2 in the impedance transformation sub-circuit are grounded.
[0023] In one possible implementation, the coaxial line impedance in the second coaxial line magnetic ring assembly Co2 is 50 ohms, and the relative permeability of the magnetic ring in the second coaxial line magnetic ring assembly Co2 is 100.
[0024] In one possible implementation, the power conversion circuit includes a plurality of grouped circuits consisting of one power conversion sub-circuit and one impedance transformation sub-circuit, wherein the plurality of grouped circuits are connected in parallel.
[0025] In one possible implementation, the power conversion circuit includes two circuits consisting of a power conversion sub-circuit and an impedance transformation sub-circuit, or the power conversion circuit includes three circuits consisting of a power conversion sub-circuit and an impedance transformation sub-circuit.
[0026] A second aspect of this disclosure provides a power converter, comprising: the power conversion circuit described in any one aspect.
[0027] This invention provides a power conversion circuit and a power converter. Compared with the prior art, it has the following advantages:
[0028] This invention employs multiple coaxial power circuits in both its power conversion and impedance transformation sub-circuits, effectively suppressing common-mode current (currents flowing in the same phase and direction on the transmission line), thereby reducing energy loss and improving power conversion efficiency. Simultaneously, the introduction of the magnetic ring shortens the effective length of the coaxial line, further enhancing circuit compactness and performance stability while also allowing for lower frequency and increased operating bandwidth. By adding a magnetic ring to the coaxial line to shorten its effective length, the circuit's compactness and performance stability are improved, while simultaneously addressing the problems inherent in symmetrical synthesizers. This compensates for the power that symmetrical synthesizers cannot decompose, providing more options for power conversion and greatly expanding the circuit's application range to accommodate complex power conversion scenarios with various frequencies.
[0029] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0030] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0031] Figure 1 This is a circuit diagram of a power conversion circuit shown according to an embodiment in the specification.
[0032] Figure 2 This is a schematic diagram of a coaxial magnetic ring assembly according to an embodiment of the specification.
[0033] Figure 3 This is a schematic diagram of the insertion loss simulation results of each branch of a power conversion circuit, as shown in the embodiment of the specification.
[0034] Figure 4 This is a schematic diagram showing the simulation results of the return loss at each port of a power conversion circuit according to the embodiment in the specification.
[0035] Figure 5 This is a schematic diagram illustrating the simulation results of the isolation effect of each branch of a power conversion circuit as shown in the embodiment of the specification. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0038] In view of this, the present disclosure provides a power conversion circuit, Figure 1 This is a circuit diagram illustrating a power conversion circuit according to one embodiment. Specifically, the power conversion circuit 10 includes:
[0039] Power conversion sub-circuit 11 and impedance transformation sub-circuit 12;
[0040] The power conversion sub-circuit 11 includes multiple coaxial power circuits 111;
[0041] Both the coaxial power circuit 111 and the impedance transformation sub-circuit 12 include multiple coaxial magnetic ring components.
[0042] See Figure 2 As shown, the coaxial cable with a magnetic ring assembly can consist of an inner conductor made of copper or copper-clad aluminum and an outer conductor made of braided copper wire or aluminum foil. A magnetic ring is fitted onto the outer surface of the outer conductor, through which the coaxial cable passes. The inner conductor is responsible for transmitting electrical signals and can be a single solid wire or a multi-strand stranded wire. The outer conductor not only serves as a return path for the signal but also prevents external electromagnetic interference from entering the cable.
[0043] Each of the coaxial power circuits 111 has a first end configured as an external input / output terminal of a first side of the power conversion circuit 10. The first end formed by connecting multiple coaxial magnetic ring components in the power conversion sub-circuit 11 is connected to the second end formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit 12.
[0044] like Figure 1 As shown, the first terminals of the three coaxial power circuits 111 on the left are respectively configured as the external input / output terminals Part2-4 of the power conversion circuit 10 on the first side.
[0045] The third terminal formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit 12 constitutes the external input / output terminal of the second side of the power conversion circuit 10.
[0046] like Figure 1 As shown, the third terminal formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit 12 constitutes the external input / output terminal Part1 on the second side of the power conversion circuit 10.
[0047] It can be explained that when the current is input from the left, the external input / output terminal Part2-4 on the left serves as the input terminal, and the external input / output terminal Part1 on the right serves as the output terminal, which can achieve the synthesis of multiple different power to obtain a larger power current; when the current is input from the right, the external input / output terminal Part1 on the right serves as the input terminal, and the external input / output terminal Part2-4 on the left serves as the output terminal, which can achieve the decomposition of a power to obtain multiple smaller power currents.
[0048] This invention employs multiple coaxial power circuits in both its power conversion and impedance transformation sub-circuits, effectively suppressing common-mode current (currents flowing in the same phase and direction on the transmission line), thereby reducing energy loss and improving power conversion efficiency. Simultaneously, the introduction of the magnetic ring shortens the effective length of the coaxial line, further enhancing circuit compactness and performance stability while also allowing for lower frequency and increased operating bandwidth. By adding a magnetic ring to the coaxial line to shorten its effective length, the circuit's compactness and performance stability are improved, while simultaneously addressing the problems inherent in symmetrical synthesizers. This compensates for the power that symmetrical synthesizers cannot decompose, providing more options for power conversion and greatly expanding the circuit's application range to accommodate complex power conversion scenarios with various frequencies.
[0049] In one possible implementation, the coaxial power circuit 111 includes a first coaxial magnetic ring assembly Co1 and a resistor R1, wherein the first end of the inner conductor of the first coaxial magnetic ring assembly Co1 in all of the coaxial power circuits 111 in the power conversion sub-circuit 11 is respectively configured as the first end of the coaxial power circuit 111.
[0050] The second end of the inner conductor of the first coaxial magnetic ring assembly Co1 in the coaxial power circuit 111 described above is connected to the first end of the resistor R1 in the coaxial power circuit 111 and the first end of the outer conductor of the first coaxial magnetic ring assembly Co1 in the coaxial power circuit 111 described below.
[0051] The second end of the outer conductor in the first coaxial power circuit 111 in the power conversion sub-circuit 11 is connected to the second end of the inner conductor in the last coaxial power circuit 111 in the power conversion sub-circuit 11 and the first end of the resistor R1 in the last coaxial power circuit 111.
[0052] The first end of the outer conductor of the first coaxial magnetic ring assembly Co1 in all the coaxial power circuits 111 in the power conversion sub-circuit 11 is connected and then constructed as the first end formed by the connection of multiple coaxial magnetic ring assemblies in the power conversion sub-circuit 11. The second end of the resistor R1 in all the coaxial power circuits 111 in the power conversion sub-circuit 11 is connected.
[0053] In one possible implementation, the number of the first coaxial magnetic ring assembly Co1 is three.
[0054] In this embodiment of the present disclosure, the number of first coaxial magnetic ring assemblies Co1 is three. Compared to a symmetric synthesizer, this allows high power to be decomposed into three smaller power units, thereby expanding power selection when multiple smaller power units are required. Furthermore, when used in combination with a symmetric synthesizer, multiple smaller power units of different power levels can be provided.
[0055] In one possible implementation, the coaxial line impedance in the first coaxial line magnetic ring assembly Co1 is 50 ohms, and the relative permeability of the magnetic ring in the first coaxial line magnetic ring assembly Co1 is 100.
[0056] In one possible implementation, the resistor R1 is 18 ohms.
[0057] In this embodiment of the disclosure, the three-channel coaxial transformer power combiner is as follows: Figure 1 As shown, the left side is the power conversion sub-circuit 11, and the right side is the impedance transformation sub-circuit 12. After the three circuits are combined, the impedance changes from 50 ohms to 16.7 ohms (50 / 3 ohms). The right side achieves the impedance change from 16.7 ohms to 50 ohms through the series and parallel connection of four coaxial lines.
[0058] The circuit consists of seven coaxial cables, each with a magnetic ring on its outer conductor. Each branch of the combiner has a balancing resistor, theoretically 16.7 ohms, but considering typical resistor nominal values, an 18-ohm nominal value is chosen, which has minimal impact on the circuit. According to circuit matching theory, the coaxial cable impedance in the combiner circuit is 50 ohms, while in the impedance matching circuit, the coaxial cable impedance is 25 ohms.
[0059] In one possible implementation, the impedance transformation sub-circuit 12 includes four second coaxial magnetic ring assemblies Co2;
[0060] The first ends of the inner conductors in the first, second, and fourth second coaxial magnetic ring assemblies Co2 in the impedance transformation sub-circuit 12 are connected and then constructed as the second ends formed by the connection of multiple coaxial lines in the impedance transformation circuit 12.
[0061] The second ends of the inner conductors in the first and third second coaxial magnetic ring assemblies Co2 in the impedance transformation sub-circuit 12 are connected and then configured as the external input / output terminals of the second side of the power conversion circuit 10.
[0062] In the impedance transformation sub-circuit 12, the second end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the second end of the inner conductor in the second second coaxial magnetic ring assembly Co2. After the first end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the second second coaxial magnetic ring assembly Co2, it is connected to the first end of the inner conductor in the third second coaxial magnetic ring assembly Co2.
[0063] After the second end of the outer conductor in the second second coaxial magnetic ring assembly Co2 is connected to the second end of the outer conductor in the third second coaxial magnetic ring assembly Co2, it is connected to the second end of the inner conductor in the fourth second coaxial magnetic ring assembly Co2.
[0064] The first end of the outer conductor in the third second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the fourth second coaxial magnetic ring assembly Co2, and both ends of the outer conductor in the fourth second coaxial magnetic ring assembly Co2 in the impedance transformation sub-circuit 12 are grounded.
[0065] In one possible implementation, the coaxial line impedance in the second coaxial line magnetic ring assembly Co2 is 50 ohms, and the relative permeability of the magnetic ring in the second coaxial line magnetic ring assembly Co2 is 100.
[0066] from Figure 3-5 The simulation results show that the circuit performance from 1 to 25 MHz is excellent and meets the engineering design requirements.
[0067] In one possible implementation, the power conversion circuit 10 includes a plurality of grouped circuits consisting of one power conversion sub-circuit 11 and one impedance transformation sub-circuit 12, with the plurality of grouped circuits connected in parallel.
[0068] In one possible implementation, the power conversion circuit 10 includes two circuits grouped together by one power conversion sub-circuit 11 and one impedance transformation sub-circuit 12, or the power conversion circuit 10 includes three circuits grouped together by one power conversion sub-circuit 11 and one impedance transformation sub-circuit 12.
[0069] In this embodiment, a six-synthesizer can be achieved by combining two three-synthesizers and one two-synthesizer, with an impedance transformer added between the two synthesizers. A nine-synthesizer is composed of three three-synthesizers and one three-synthesizer, with an impedance transformer structure added to the middle and common terminals. This not only allows for the provision of more smaller power outputs after decomposition, but also provides a wider range of selectable power when used in conjunction with other symmetrical synthesizers.
[0070] This disclosure also provides a power converter, including: the power conversion circuit 10 as described in any one of the first aspects.
[0071] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various changes, modifications, substitutions and variations can be made to these embodiments, and all such changes, modifications, substitutions and variations fall within the protection scope of the present disclosure.
[0072] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction, and such combinations should also be considered as part of this disclosure. To avoid unnecessary repetition, this disclosure will not further describe the various possible combinations. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A power conversion circuit (10), characterized in that, The power conversion circuit (10) includes: Power conversion sub-circuit (11) and impedance transformation sub-circuit (12); The power conversion sub-circuit (11) includes multiple coaxial power circuits (111). Both the coaxial power circuit (111) and the impedance transformation sub-circuit (12) include multiple coaxial magnetic ring components; The first end of each of the coaxial power circuits (111) is configured as an external input / output terminal of a first side of the power conversion circuit (10). The first end formed by connecting multiple coaxial magnetic ring assemblies in the power conversion sub-circuit (11) is connected to the second end formed by connecting multiple coaxial magnetic ring assemblies in the impedance transformation sub-circuit (12). The third end formed by connecting multiple coaxial magnetic ring components in the impedance transformation sub-circuit (12) constitutes the external input / output terminal of the second side of the power conversion circuit (10).
2. The circuit (10) as described in claim 1, characterized in that, The coaxial power circuit (111) includes a first coaxial magnetic ring assembly Co1 and a resistor R1. The first end of the inner conductor of the first coaxial magnetic ring assembly Co1 in all the coaxial power circuits (111) in the power conversion sub-circuit (11) is respectively constructed as the first end of the coaxial power circuit (111). The second end of the inner conductor of the first coaxial magnetic ring assembly Co1 in the coaxial power circuit (111) described above is connected to the first end of the resistor R1 in this coaxial power circuit (111) and the second end of the outer conductor of the first coaxial magnetic ring assembly Co1 in the coaxial power circuit (111) described below. The second end of the outer conductor in the first coaxial power circuit (111) of the power conversion sub-circuit (11) is connected to the second end of the inner conductor in the last coaxial power circuit (111) of the power conversion sub-circuit (11) and the first end of the resistor R1 in the last coaxial power circuit (111). The first end of the outer conductor of the first coaxial magnetic ring assembly Co1 in all the coaxial power circuits (111) in the power conversion sub-circuit (11) is connected and then constructed as the first end formed by the connection of multiple coaxial magnetic ring assemblies in the power conversion sub-circuit (11). The second end of the resistor R1 in all the coaxial power circuits (111) in the power conversion sub-circuit (11) is connected.
3. The circuit (10) as described in claim 2, characterized in that, The number of the first coaxial magnetic ring assembly Co1 is three.
4. The circuit (10) as described in claim 2, characterized in that, The coaxial line impedance in the first coaxial line magnetic ring assembly Co1 is 50 ohms, and the relative permeability of the magnetic ring in the first coaxial line magnetic ring assembly Co1 is 100.
5. The circuit (10) as described in claim 2, characterized in that, The resistor R1 is 18 ohms.
6. The circuit (10) as described in claim 1, characterized in that, The impedance transformation sub-circuit (12) includes four second coaxial magnetic ring components Co2; The first ends of the inner conductors in the first, second and fourth second coaxial magnetic ring assemblies Co2 in the impedance transformation sub-circuit (12) are connected and then constructed as the second ends formed by the connection of multiple coaxial lines in the impedance transformation sub-circuit (12); The second ends of the inner conductors in the first and third second coaxial magnetic ring components Co2 in the impedance transformation sub-circuit (12) are connected and then configured as the external input / output terminals of the second side of the power conversion circuit (10); In the impedance transformation sub-circuit (12), the second end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the second end of the inner conductor in the second second coaxial magnetic ring assembly Co2. After the first end of the outer conductor in the first second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the second second coaxial magnetic ring assembly Co2, it is connected to the first end of the inner conductor in the third second coaxial magnetic ring assembly Co2. After the second end of the outer conductor in the second second coaxial magnetic ring assembly Co2 is connected to the second end of the outer conductor in the third second coaxial magnetic ring assembly Co2, it is connected to the second end of the inner conductor in the fourth second coaxial magnetic ring assembly Co2. The first end of the outer conductor in the third second coaxial magnetic ring assembly Co2 is connected to the first end of the outer conductor in the fourth second coaxial magnetic ring assembly Co2, and both ends of the outer conductor in the fourth second coaxial magnetic ring assembly Co2 in the impedance transformation sub-circuit (12) are grounded.
7. The power conversion circuit (10) as described in claim 6, characterized in that, The coaxial line impedance in the second coaxial line magnetic ring assembly Co2 is 50 ohms, and the relative permeability of the magnetic ring in the second coaxial line magnetic ring assembly Co2 is 100.
8. The power conversion circuit (10) as described in any one of claims 1-7, characterized in that, The power conversion circuit (10) includes multiple grouped circuits consisting of one power conversion sub-circuit (11) and one impedance transformation sub-circuit (12), and the multiple grouped circuits are connected in parallel.
9. The power conversion circuit (10) as described in claim 8, characterized in that, The power conversion circuit (10) includes two circuits consisting of one power conversion sub-circuit (11) and one impedance transformation sub-circuit (12), or the power conversion circuit (10) includes three circuits consisting of one power conversion sub-circuit (11) and one impedance transformation sub-circuit (12).
10. A power converter, characterized in that, include: The power conversion circuit (10) according to any one of claims 1-9.