Controllable inductor and control method thereof

Abstract

The invention discloses a controllable inductor and a control method thereof, and relates to the technical field of inductors. The controllable inductor comprises a plurality of coils wound on a magnetic core in parallel; the connecting structure is used for adjusting the connection between the coil windings; the input circuit is used for receiving an external input signal and adjusting a coil connection structure according to the signal so as to change the rated current and the inductance value of the inductor; the feedback circuit is used for monitoring the current of the inductor in real time and feeding back a monitoring result to the input circuit so as to realize closed-loop control; according to the invention, accurate adjustment of the inductance value can be realized, so that the requirements of various application scenes on inductance accuracy are met. A user can flexibly adjust the inductance value in a wide range according to actual needs, and the flexibility and adaptability of circuit design are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inductors, and particularly to a controllable inductor and a control method thereof. Background Art

[0002] In modern electronic devices, inductors, as important passive components, play an irreplaceable role. They are widely used in key fields such as filtering, energy storage, and electromagnetic compatibility, and are important components to ensure the stable and efficient operation of circuit performance. However, with the rapid development of electronic technology, the limitations of traditional inductors have become increasingly prominent, especially in some scenarios that require highly adaptive adjustment, such as dynamic power adjustment in wireless charging systems and dynamic filtering in high-frequency communications.

[0003] The rated current of traditional inductors is usually fixed, which means they cannot be dynamically adjusted according to the actual working state of the circuit. This fixity greatly limits the application flexibility of inductors, making it possible for inductors not to always operate in the optimal state in some complex and changeable circuit environments, thus affecting the performance and efficiency of the entire system.

[0004] More critically, the control methods of traditional inductors are relatively simple and lack a necessary feedback system to achieve real-time correction and adjustment. This results in the rated current and inductance value of each inductor product being determined after production and cannot be flexibly modified according to the actual situation. This "one-time" setting method not only is not conducive to the actual production process, increases production costs and complexity, but also limits the application potential of inductors in a wider range of scenarios.

[0005] In a wireless charging system, if the rated current of the inductor cannot be dynamically adjusted according to the charging device and battery status, it may lead to low charging efficiency, overheating, and even device damage. Similarly, in high-frequency communications, if the inductance value of the inductor cannot be adjusted in real time according to signal changes, it may seriously affect the signal transmission quality and system stability. Summary of the Invention

[0006] The purpose of the present invention is to provide a controllable inductor and a control method thereof to solve the problem that traditional inductors cannot dynamically adjust the rated current and inductance value according to the circuit working state.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A controllable inductor, comprising:

[0009] Multiple coils wound in parallel on a magnetic core;

[0010] A connection structure for adjusting the connection between coil windings;

[0011] An input circuit, configured to receive an external input signal and adjust the coil connection structure according to the signal, thereby changing the rated current and inductance value of the inductor;

[0012] A feedback circuit, configured to monitor the current of the inductor in real time and feed the monitoring result back to the input circuit to achieve closed-loop control.

[0013] As a further solution of the present invention: The coil winding connection structure is a structure in which multiple coils are connected in parallel and in series, and the rated current and inductance value of the inductor are changed by connecting different numbers of coils in parallel or in series.

[0014] As a further solution of the present invention: The feedback circuit includes a current sensor, a voltage sensor or a power sensor, configured to monitor the current, voltage or power of the inductor in real time and convert the monitoring result into an electrical signal and feed it back to the input circuit.

[0015] As a further solution of the present invention: The connection structure includes a first-layer adjustment connecting plate, a second-layer rated inductance layer bottom plate and a third-layer rated current layer bottom plate arranged in sequence from top to bottom. The magnetic core is arranged above the first-layer adjustment connecting plate, and a coil is wound around the outside of the magnetic core. The coil penetrates through the first-layer adjustment connecting plate and the second-layer rated inductance layer bottom plate. A plurality of second-layer structural copper wires are fixedly penetrated and arranged on the second-layer rated inductance layer bottom plate. The upper end of the second-layer structural copper wire is fixedly connected to the first-layer adjustment connecting plate, and the lower end of the second-layer structural copper wire is fixedly connected to the third-layer rated current layer bottom plate. And a plurality of third-layer structural copper wires are fixedly installed at the lower end of the third-layer rated current layer bottom plate; The second-layer rated inductance layer bottom plate and the third-layer rated current layer bottom plate are fixedly arranged, and the first-layer adjustment connecting plate is movably arranged relative to the second-layer rated inductance layer bottom plate and the third-layer rated current layer bottom plate.

[0016] As a further solution of the present invention: It further includes a control unit, which is connected to the input circuit and the feedback circuit, and is configured to control the input circuit to adjust the coil connection structure according to the monitoring result of the feedback circuit and a preset inductance value or rated current value range.

[0017] As a further solution of the present invention: It further includes a temperature compensation circuit, configured to adjust the rated current and inductance value of the inductor according to temperature changes.

[0018] A control method for a controllable inductor, comprising the following steps:

[0019] The input circuit receives an external input signal, which reflects the circuit's requirements for the rated current and inductance;

[0020] According to the input signal, adjust the connection structure of the coil to change the rated current and inductance value of the inductor;

[0021] The feedback circuit monitors the current and inductance value of the inductor in real time and feeds the monitoring results back to the input circuit;

[0022] The input circuit adjusts the coil connection structure according to the feedback result to keep the rated current and inductance value of the inductor within the required range.

[0023] As a further solution of the present invention: before adjusting the coil connection structure, it further includes calculating the required rated current or inductance value according to the preset inductance value or rated current value range and the monitoring results of the feedback circuit.

[0024] An electronic device includes the above-mentioned controllable inductor and a control unit for controlling the controllable inductor.

[0025] As a further solution of the present invention: the electronic device is a power management system, an electromagnetic compatibility design system or a high-frequency filter.

[0026] Advantages of the present invention:

[0027] (1) The present invention can achieve precise adjustment of the inductance value, thus meeting the requirements of various application scenarios for inductance accuracy. Users can flexibly adjust the inductance value within a wide range according to actual needs, improving the flexibility and adaptability of circuit design.

[0028] (2) The controllable inductor can adjust the inductance value according to the actual load condition, thus optimizing the working state of the circuit, reducing power consumption, and improving energy utilization efficiency. In high-frequency circuits, by precisely adjusting the inductance value, harmonic interference can be effectively suppressed, and the stability and reliability of the circuit can be improved.

[0029] (3) Traditional inductor adjustment often requires complex mechanical structures or additional electronic components, while the present invention simplifies the inductor adjustment process through an innovative control method, reducing the complexity of circuit design. This helps to reduce production costs, improve production efficiency, and also helps to enhance the market competitiveness of products.

[0030] (4) Due to the characteristics of precise adjustment and flexible configuration of the controllable inductor, it is applicable to a variety of application scenarios, such as communication devices, power electronics systems, automotive electronics, etc. The application range is wide, and it can meet the diverse needs of inductor adjustment in different fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 is a three-dimensional structural schematic diagram of a controllable inductor of the present invention;

[0033] Figure 2 is an axonometric structural schematic diagram of a controllable inductor of the present invention;

[0034] Figure 3 is a front view structural schematic diagram of a controllable inductor according to the present invention;

[0035] Figure 4 is a flowchart of a method for controlling a controllable inductor according to the present invention.

[0036] In the figure: 10, a first-layer adjusting connecting plate; 20, a second-layer rated inductor layer bottom plate; 30, a third-layer rated current layer bottom plate; 40, a magnetic core; 50, a coil; 60, a second-layer structural copper wire; 70, a third-layer structural copper wire. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention / utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention / utility model. Obviously, the described embodiments are only a part of the embodiments of the present invention / utility model, rather than all of the embodiments. Based on the embodiments of the present invention / utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention / utility model.

[0038] In the description of the present invention / utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation. Therefore, it should not be construed as a limitation of the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present invention / utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] Please refer to Figures 1-3As shown, the present invention is a controllable inductor, which realizes the adjustability of the inductance value through multiple coils 50 wound in parallel around a magnetic core 40 and a connection structure for adjusting the connection between the coil windings. The input circuit adjusts the coil connection structure according to an external input signal, thereby changing the rated current and inductance value of the inductor. The feedback circuit monitors the current of the inductor in real time and feeds the monitoring result back to the input circuit to achieve closed-loop control. This structure enables the inductor to dynamically adjust the rated current and inductance value according to the working state of the circuit, improving the flexibility and adaptability of the circuit.

[0041] Specifically, the connection structure includes an adjustment connection plate 10, a second-layer rated inductance layer bottom plate 20, and a third-layer rated current layer bottom plate 30 arranged in sequence from top to bottom. The magnetic core 40 is arranged above the adjustment connection plate 10, and a coil 50 is wound around the outside of the magnetic core 40. The coil 50 penetrates through the adjustment connection plate 10 and the second-layer rated inductance layer bottom plate 20. A plurality of second-layer structure copper wires 60 are fixedly penetrated and arranged on the second-layer rated inductance layer bottom plate 20. The upper end of the second-layer structure copper wire 60 is fixedly connected to the adjustment connection plate 10, and the lower end of the second-layer structure copper wire 60 is fixedly connected to the third-layer rated current layer bottom plate 30. And a plurality of third-layer structure copper wires 70 are fixedly installed at the lower end of the third-layer rated current layer bottom plate 30; the second-layer rated inductance layer bottom plate 20 and the third-layer rated current layer bottom plate 30 are fixedly arranged, and the adjustment connection plate 10 is movably arranged relative to the second-layer rated inductance layer bottom plate 20 and the third-layer rated current layer bottom plate 30. By twisting the adjustment connection plate 1, the conversion between high current and high inductance is realized.

[0042] Further, the magnetic core 40 is of an annular structure, and the coil 50 is wound around the outer periphery of the magnetic core 40 in an annular shape.

[0043] The coil winding connection structure adopts a structure of parallel connection and series connection of multiple coils. By connecting different numbers of coils in parallel or in series, the rated current and inductance value of the inductor are changed. This structure enables the inductor to form a variety of adjustable inductance structures to adapt to different circuit requirements.

[0044] The feedback circuit includes a current sensor, a voltage sensor or a power sensor, which is used to monitor the current, voltage or power of the inductor in real time and convert the monitoring result into an electrical signal and feed it back to the input circuit. This setting enables the inductor to monitor its working state in real time and make adjustments according to the monitoring result, so as to keep the rated current and inductance value of the inductor within the required range.

[0045] The magnetic core is made of a material with adjustable magnetic permeability, such as magnetostrictive material, magnetorheological material or nanocrystalline soft magnetic composite material. The magnetic permeability of the magnetic core is adjusted by an external magnetic field, current or temperature, thereby changing the inductance value of the inductor. This setting enables the inductor to further adjust the inductance value, improving its adaptability and flexibility.

[0046] The control unit is connected to the input circuit and the feedback circuit, and is used to control the input circuit to adjust the coil connection structure according to the monitoring result of the feedback circuit and the preset inductance value or rated current value range. The control unit adopts a microprocessor or a digital signal processor, and realizes the closed-loop control of the inductance through a preset algorithm or program. This setting enables the inductor to automatically adjust its working state and keep the rated current and inductance value of the inductor within the preset range.

[0047] Furthermore, the control unit uses a microprocessor or a digital signal processor as the core component, and precisely controls the input circuit and the feedback circuit through a preset algorithm or program. This setting improves the control accuracy and stability of the inductor, enabling the inductor to better adapt to different circuit requirements.

[0048] The temperature compensation circuit is used to adjust the rated current and inductance value of the inductor according to the temperature change. Through temperature compensation, the performance of the inductor is ensured to be stable at different temperatures, and the reliability and service life of the inductor are improved.

[0049] Please refer to Figure 4 As shown, the present invention also provides a control method for a controllable inductor, including the following steps:

[0050] The input circuit receives: The input circuit receives an external input signal, which can be a rated current value model or an inductance value demand signal. The input signal reflects the circuit's requirements for the rated current and inductance.

[0051] Winding connection structure: According to the input signal, the input circuit calculates the required rated current or inductance value, adjusts the connection structure of the winding, and changes the inductance value or current value of the product. For example, by adjusting the winding from a single-wire winding to a double-wire winding in series, the rated current of the entire inductor is changed.

[0052] Feedback circuit: The feedback circuit monitors the current of the inductor and the inductance value required by the inductor in real time, and feeds back the monitoring result to the input circuit. The feedback signal can be a direct measurement value of the current or an inductance value related to the inductor.

[0053] Closed-loop adjustment: The input circuit changes the winding connection structure according to the feedback signal, so that the rated current or inductance value of the inductor is kept within the required range.

[0054] Through this method, the dynamic adjustment of the rated current and inductance value of the inductor can be realized, improving the flexibility and adaptability of the circuit.

[0055] Further, before adjusting the coil connection structure, it also includes calculating the required rated current or inductance value according to a preset inductance value or rated current value range and the monitoring results of the feedback circuit. This setting enables the inductor to more accurately adjust its working state to meet the requirements of the circuit.

[0056] It should be noted that in practical applications, the coil connection structure is dynamically adjusted according to the working state of the circuit, such as load changes, frequency changes, etc., so as to change the rated current and inductance value of the inductor and optimize the circuit performance. This setting enables the inductor to better adapt to different working environments and circuit requirements.

[0057] The present invention also provides an electronic device, including the above-mentioned controllable inductor and a control unit for controlling the controllable inductor. The electronic device is a power management system, an electromagnetic compatibility design system or a high-frequency filter. The application scenarios of different electronic devices have different requirements for inductors, so it is necessary to select appropriate external input signals according to specific application scenarios. By receiving these signals, the inductor can more accurately adjust its working state to meet the requirements of the circuit.

[0058] Working principle of the present invention: The controllable inductor and its control method of the present invention can be widely applied to electronic devices such as power management systems, electromagnetic compatibility design systems and high-frequency filters. For example, in a power management system, the controllable inductor can dynamically adjust the rated current according to the load change, optimize the power efficiency and reduce energy loss. A specific example is that in an electric vehicle charging system, the controllable inductor can dynamically adjust the rated current according to the charging demand to improve the charging efficiency.

[0059] In an electromagnetic compatibility design system, the controllable inductor can dynamically adjust the inductance value according to the external electromagnetic environment to improve the anti-interference ability of the system. For example, in an industrial automation system, the controllable inductor can dynamically adjust the inductance value according to the intensity of external electromagnetic interference to reduce the influence of interference signals.

[0060] In a high-frequency filter, the controllable inductor can dynamically adjust the rated current and inductance value according to the signal frequency to optimize the filtering effect and improve the performance of the filter. For example, in a 5G communication system, the controllable inductor can dynamically adjust the size of the inductance value according to the change of the signal frequency to achieve the best filtering effect.

[0061] The above has described a specific embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A controllable inductor, characterized in that, Comprising: Multiple coils wound in parallel around a magnetic core; A connection structure for adjusting the connection between coil windings; An input circuit for receiving an external input signal and adjusting the coil connection structure according to the signal, thereby changing the rated current and inductance value of the inductor; A feedback circuit for real-time monitoring of the current of the inductor and feeding back the monitoring result to the input circuit to achieve closed-loop control.

2. The controllable inductor according to claim 1, characterized in that, The coil winding connection structure is a parallel and series connection structure of multiple coils, and the rated current and inductance value of the inductor are changed by connecting different numbers of coils in parallel or in series.

3. A controllable inductor according to claim 1, characterized in that The feedback circuit includes a current sensor, a voltage sensor or a power sensor for real-time monitoring of the current, voltage or power of the inductor and converting the monitoring result into an electrical signal and feeding it back to the input circuit.

4. A controllable inductor according to claim 1, characterized in that, The connection structure includes a first-layer adjustment connecting plate (10), a second-layer rated inductance layer bottom plate (20) and a third-layer rated current layer bottom plate (30) arranged in sequence from top to bottom. Among them, the magnetic core (40) is arranged above the first-layer adjustment connecting plate (10), and a coil (50) is wound around the outside of the magnetic core (40). The coil (50) penetrates through the first-layer adjustment connecting plate (10) and the second-layer rated inductance layer bottom plate (20). A number of second-layer structural copper wires (60) are fixedly penetrated and arranged on the second-layer rated inductance layer bottom plate (20). The upper end of the second-layer structural copper wire (60) is fixedly connected to the first-layer adjustment connecting plate (10), and the lower end of the second-layer structural copper wire (60) is fixedly connected to the third-layer rated current layer bottom plate (30). And a number of third-layer structural copper wires (70) are fixedly installed at the lower end of the third-layer rated current layer bottom plate (30); the second-layer rated inductance layer bottom plate (20) and the third-layer rated current layer bottom plate (30) are fixedly arranged, and the first-layer adjustment connecting plate (10) is movably arranged relative to the second-layer rated inductance layer bottom plate (20) and the third-layer rated current layer bottom plate (30).

5. A controllable inductor according to claim 1, characterized in that, It further includes a control unit, which is connected to the input circuit and the feedback circuit, and is used for controlling the input circuit to adjust the coil connection structure according to the monitoring result of the feedback circuit and the preset inductance value or rated current value range.

6. The controllable inductor according to claim 1, wherein It further includes a temperature compensation circuit for adjusting the rated current and inductance value of the inductor according to temperature changes.

7. A control method for a controllable inductor, characterized in that, Including the following steps: The input circuit receives an external input signal, which reflects the circuit's requirements for the rated current and inductance; According to the input signal, adjust the connection structure of the coil to change the rated current and inductance value of the inductor; The feedback circuit real-time monitors the current and inductance value of the inductor and feeds back the monitoring result to the input circuit; The input circuit adjusts the coil connection structure according to the feedback result to keep the rated current and inductance value of the inductor within the required range.

8. The control method of a controllable inductor according to claim 7, wherein, Before adjusting the coil connection structure, it further includes calculating the required rated current or inductance value according to the preset inductance value or rated current value range and the monitoring result of the feedback circuit.

9. An electronic device, characterized in that: Including the controllable inductor as described in claim 1, and a control unit for controlling the controllable inductor.

10. An electronic device according to claim 9, characterized in that, The electronic device is a power management system, an electromagnetic compatibility design system or a high-frequency filter.

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