Magnetic device and method for applying magnetic device

Abstract

The invention discloses a magnetic device and a method for applying the magnetic device. The magnetic device comprises a first magnetic part and a second magnetic part, a second magnetic member; a third magnetic member; the fourth magnetic part is magnetically connected with one end of the first magnetic part, one end of the second magnetic part and one end of the third magnetic part; the fifth magnetic part is magnetically connected with the other end of the first magnetic part, the other end of the second magnetic part and the other end of the third magnetic part respectively; one part of the primary side coil is wound on the second magnetic piece, and the other part of the primary side coil is wound on the third magnetic piece; the secondary coil is wound on the second magnetic piece; and the mutual inductance coil is wound on the third magnetic piece. On the basis of the mode, the size of the magnetic device with voltage transformation, resonance and mutual inductance capabilities can be reduced.

Description

Technical Field

[0001] This application relates to the field of magnetic technology, and in particular to magnetic devices and methods of using magnetic devices. Background Technology

[0002] In existing technologies, three types of components are commonly used in resonant circuits: transformers, resonant inductors, and mutual inductors. Therefore, in practice, it is usually necessary to use all three components—transformers, resonant inductors, and mutual inductors—to ensure that the resonant circuit can operate normally.

[0003] The drawback of the existing technology is that, since a resonant circuit usually requires the simultaneous placement of a transformer, a resonant inductor, and a current transformer, and the total volume of the transformer, resonant inductor, and current transformer is relatively large, the magnetic components used in the resonant circuit that include the transformer, resonant inductor, and current transformer are likely to be relatively large. Summary of the Invention

[0004] The main technical problem addressed in this application is how to reduce the size of a magnetic device that simultaneously possesses transformer, resonant, and mutual inductance capabilities.

[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: a magnetic device, comprising: a first magnetic element; a second magnetic element; a third magnetic element; a fourth magnetic element, the fourth magnetic element being magnetically connected to one end of the first magnetic element, one end of the second magnetic element, and one end of the third magnetic element; a fifth magnetic element, the fifth magnetic element being magnetically connected to the other end of the first magnetic element, the other end of the second magnetic element, and the other end of the third magnetic element; a primary coil, a portion of which is wound on the second magnetic element, and another portion of which is wound on the third magnetic element; the ends of the primary coil and the other portion of which are near the fourth magnetic element are corresponding ends, or the ends of the primary coil and the other portion of which are near the fifth magnetic element are corresponding ends; a secondary coil, the secondary coil being wound on the second magnetic element; and a mutual inductance coil, the mutual inductance coil being wound on the third magnetic element.

[0006] The number of turns in the other part of the primary coil is less than the number of turns in the mutual inductance coil.

[0007] The leakage inductance between a portion of the primary coil and another portion of the primary coil is used as a resonant inductor, and the two ends of the primary coil are used as the two ends of the resonant inductor; and / or, the two ends of the secondary coil are used to output the secondary voltage; and / or, the two ends of the mutual inductance coil are used to output the sampling current.

[0008] Wherein, the fifth magnetic component is magnetically connected to the other end of the first magnetic component through the first air gap; and / or, the fifth magnetic component is magnetically connected to the other end of the second magnetic component through the second air gap; and / or, the fifth magnetic component is magnetically connected to the other end of the second magnetic component through the third air gap.

[0009] To solve the above-mentioned technical problems, the second technical solution adopted in this application is: a method of applying a magnetic device, wherein the magnetic device is the aforementioned magnetic device; the method includes: adjusting the magnetic capability of the magnetic device based on at least one of the magnetic resistance corresponding to the first air gap, the magnetic resistance corresponding to the second air gap, and the magnetic resistance corresponding to the third air gap.

[0010] The method of adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap, the magnetic reluctance corresponding to the second air gap, and the magnetic reluctance corresponding to the third air gap includes: determining or adjusting the inductance value of the resonant inductor based on the magnetic reluctance corresponding to the first air gap and the number of turns of a portion of the primary coil.

[0011] The magnetic reluctance corresponding to the first air gap, the number of turns of a portion of the primary coil, and the inductance value of the resonant inductor satisfy the first formula: The first formula is:

[0012] L1 = (Np1) 2 / R1

[0013] L1 is the inductance value of the resonant inductor, Np1 is the number of turns of a portion of the primary coil, and R1 is the magnetic reluctance corresponding to the first air gap.

[0014] The method of adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap, the magnetic reluctance corresponding to the second air gap, and the magnetic reluctance corresponding to the third air gap includes: determining or adjusting the inductance value of the excitation inductance of the primary coil based on the magnetic reluctance corresponding to the second air gap, the magnetic reluctance corresponding to the third air gap, and the number of turns of a portion of the primary coil.

[0015] The magnetic reluctance corresponding to the second air gap, the magnetic reluctance corresponding to the third air gap, the number of turns of a portion of the primary coil, and the magnetizing inductance of the primary coil satisfy the second formula: The second formula is:

[0016] L2=(Np1) 2 / R2

[0017] L3=(Np1) 2 / R3

[0018] 1 / L = 1 / L² + 1 / L³

[0019] L is the inductance value of the magnetizing inductance of the primary coil, L2 is the inductance value of the magnetizing inductance of a part of the primary coil, L3 is the inductance value of the magnetizing inductance of another part of the primary coil, Np1 is the number of turns of a part of the primary coil, R2 is the reluctance corresponding to the second air gap, and R3 is the reluctance corresponding to the third air gap.

[0020] The method further includes: determining the output current value of the primary coil based on the number of turns of a portion of the primary coil, the number of turns of the mutual inductance coil, and the output current value of the mutual inductance coil; the number of turns of a portion of the primary coil, the number of turns of the mutual inductance coil, the output current value of the mutual inductance coil, and the output current value of the primary coil satisfy the third formula; the third formula is:

[0021] Ic=(Np1 / Nc)*I1

[0022] I1 is the current value output by the primary coil, Ic is the current value output by the mutual inductance coil, Np1 is the number of turns of a portion of the primary coil, and Nc is the number of turns of the mutual inductance coil.

[0023] The beneficial effects of this application are as follows: Unlike the prior art, in the technical solution of this application, the fourth magnetic element is magnetically connected to one end of the first magnetic element, one end of the second magnetic element, and one end of the third magnetic element; the fifth magnetic element is magnetically connected to the other ends of the first magnetic element, the other ends of the second magnetic element, and the other ends of the third magnetic element; a portion of the primary coil is wound around the second magnetic element, and the other portion of the primary coil is wound around the third magnetic element; the ends of the primary coil and the other portion of the primary coil near the fourth magnetic element are corresponding ends; or, the ends of the primary coil and the other portion of the primary coil near the fifth magnetic element are corresponding ends. With the terminals of the same name being connected, the secondary coil is wound on the second magnetic element, and the mutual inductance coil is wound on the third magnetic element. Based on the above method, the leakage inductance between a part of the primary coil and another part of the primary coil can be used as a resonant inductor, or a transformer can be formed by a part of the primary coil and the secondary coil, or a mutual inductor can be formed by another part of the primary coil and the mutual inductance coil. Furthermore, by winding the resonant inductor, transformer, and mutual inductor-related coils on two magnetic cores, the resonant inductor, transformer, and mutual inductor can be integrated into the same magnetic device, reducing the size of the magnetic device that simultaneously has the capabilities of voltage transformation, resonance, and mutual inductance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of one embodiment of the magnetic device of this application;

[0026] Figure 2 This is a schematic diagram of the equivalent magnetic circuit of an embodiment of the magnetic device of this application;

[0027] Figure 3 This is a schematic diagram of the structure of an embodiment of the equivalent circuit of the magnetic device of this application.

[0028] Reference numerals: First magnetic component 101, Second magnetic component 102, Third magnetic component 103, Fourth magnetic component 104, Fifth magnetic component 105, Primary coil 106, Part of primary coil 106 1061, Another part of primary coil 106 1062, Secondary coil 107, Mutual inductance coil 108, First air gap 109, Second air gap 110, Third air gap 111, First reluctance 21, Second reluctance 22, Third reluctance 23, First magnetic source 24, Second magnetic source 25, Third magnetic source 26, Fourth magnetic source 27, First inductor 31, Second inductor 32, Third inductor 33, Fourth inductor 34, Fifth inductor 35, Sixth inductor 36, Seventh inductor 37, Eighth inductor 38. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of this application, it is necessary to specify that, unless otherwise expressly stated and limited, the terms "installation," "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms within the context of this application.

[0032] This application first proposes a magnetic device, see [link to previous document]. Figure 1 , Figure 1 This is a schematic diagram of the structure of one embodiment of the magnetic device of this application, as shown below. Figure 1 As shown, the magnetic device includes a first magnetic component 101, a second magnetic component 102, a third magnetic component 103, a fourth magnetic component 104, a fifth magnetic component 105, a primary coil 106, a secondary coil 107, and a mutual inductance coil 108.

[0033] The fourth magnetic component 104 is magnetically connected to one end of the first magnetic component 101, one end of the second magnetic component 102, and one end of the third magnetic component 103, respectively. The fifth magnetic component 105 is magnetically connected to the other end of the first magnetic component 101, the other end of the second magnetic component 102, and the other end of the third magnetic component 103, respectively.

[0034] The first magnetic component 101, the second magnetic component 102, the third magnetic component 103, and the fourth magnetic component 104 can be an integrated magnetic structure or independent magnetic structures that are magnetically connected to each other.

[0035] For example, when the first magnetic element 101, the second magnetic element 102, the third magnetic element 103, and the fourth magnetic element 104 are an integrated magnetic structure, the integrated magnetic structure can be a can-type magnetic core, an RM-type magnetic core, an E-type magnetic core, a PQ-type magnetic core, or other types of magnetic core structures that satisfy the relative positional relationship between the first magnetic element 101, the second magnetic element 102, the third magnetic element 103, and the fourth magnetic element 104. The specific magnetic core structure can be selected according to actual needs, and no limitation is made here.

[0036] The fifth magnetic element 105 may be provided with corresponding air gaps between itself and the first magnetic element 101, the second magnetic element 102, and the third magnetic element 103. By adjusting the width of the air gaps, the magnetic resistance formed in the magnetic connection corresponding to the air gaps at the respective positions can be adjusted. In one example, the air gap may specifically be a spacer air column formed by the air between adjacent magnetic elements.

[0037] A portion 1061 of the primary coil 106 is wound around the second magnetic element 102, and another portion 1062 of the primary coil 106 is wound around the third magnetic element 103. The secondary coil 107 is wound around the second magnetic element 102. The mutual inductance coil 108 is wound around the third magnetic element 103.

[0038] In this configuration, the ends of a portion of the primary coil 106 and the other portion of the primary coil 106 that are near the fourth magnetic element 104 are corresponding ends, or the ends of a portion of the primary coil 106 and the other portion of the primary coil 106 that are near the fifth magnetic element 105 are corresponding ends. Based on this configuration, the magnetic flux direction on the second magnetic element 102 is the same as the magnetic flux direction on the third magnetic element 103, thereby achieving magnetic flux balance between the magnetic flux on the second magnetic element 102 and the magnetic flux on the third magnetic element 103 and the magnetic flux on the first magnetic element 101. This forms a magnetic circuit between the first magnetic element 101 and the second magnetic element 102, as well as a magnetic circuit between the first magnetic element 101 and the third magnetic element 103.

[0039] Among them, the same-name terminals are an important feature in devices such as transformers and instrument transformers, as they determine the phase relationship of the electromotive forces (EMFs) inside the primary and secondary coils. Same-name terminals generally refer to the terminals in two or more windings that have the same potential polarity at any given moment under the same alternating magnetic flux. In transformers, the polarity of the primary and secondary windings is indicated by a dot (·). If both primary and secondary windings have a dot, it indicates that the induced EMFs at those two ends are in the same phase, and these are called same-name terminals. If one end has a dot and the other does not, it indicates that the induced EMFs at those two ends are in opposite phases, and these are called non-same-name terminals, also known as opposite-name terminals.

[0040] When a current is input to terminal A1 of the primary coil and flows out from terminal A2, a corresponding change in electric field is generated based on the structure of the two magnetic circuits mentioned above. Terminals A1 and A2 of the primary coil are the opposite ends of the primary coil, with terminal A1 located on the second magnetic element 102 and terminal A2 located on the third magnetic element 103.

[0041] First, a portion 1061 of the primary coil 106 wound on the second magnetic element 102, together with the secondary coil 107 also wound on the second magnetic element 102, can form a transformer. Based on the ratio of the number of turns of the portion 1061 of the primary coil to the number of turns of the secondary coil 107, and by adjusting the voltage on the portion 1061 of the primary coil, the voltage between the two ends B1 and B2 of the secondary coil 107 can be adjusted, thus giving the magnetic device the ability to transform voltage. Both ends B1 and B2 of the secondary coil 107 are located on the second magnetic element 102 and extend in the same direction.

[0042] Secondly, the leakage inductance between a portion 1061 of the primary coil 106 wound on different magnetic cores and another portion 1062 of the primary coil 106 can be used as a resonant inductor. Specifically, the two ends A1 and A2 of the primary coil 106 can be used as the two ends of the resonant inductor and connected to the corresponding resonant circuit for use, so that the magnetic device has the ability to resonate.

[0043] Third, another portion 1062 of the primary coil 106 wound on the third magnetic element 103, together with the mutual inductance coil 108 also wound on the third magnetic element 103, forms a mutual inductor. The current in the primary coil 106 can be determined by sampling the mutual inductance current at both ends C1 and C2 of the secondary coil 107, thus achieving mutual inductance. Based on this, the magnitude of the input current to the primary coil 106 can be monitored and adjusted to ensure the transformer or resonant inductor maintains normal operation. Both ends C1 and C2 of the secondary coil 107 are located on the third magnetic element 103 and extend in the same direction.

[0044] Unlike existing technologies, in this application, the fourth magnetic component magnetically connects one end of the first magnetic component, one end of the second magnetic component, and one end of the third magnetic component. The fifth magnetic component magnetically connects the other ends of the first, second, and third magnetic components. A portion of the primary coil is wound around the second magnetic component, and the other portion is wound around the third magnetic component. The ends of the primary coil and the other portion near the fourth magnetic component are corresponding ends, or the ends of the primary coil and the other portion near the fifth magnetic component are corresponding ends. The coil is wound on the second magnetic component, and the mutual inductance coil is wound on the third magnetic component. Based on the above method, the leakage inductance between a part of the primary coil and another part of the primary coil can be used as a resonant inductor, or a transformer can be formed by a part of the primary coil and the secondary coil, or a mutual inductor can be formed by another part of the primary coil and the mutual inductance coil. Furthermore, by winding the resonant inductor, transformer, and mutual inductor-related coils on two magnetic cores, the resonant inductor, transformer, and mutual inductor can be integrated into the same magnetic device, reducing the size of the magnetic device that simultaneously has the capabilities of voltage transformation, resonance, and mutual inductance.

[0045] In one embodiment, the number of turns of another portion 1062 of the primary coil 106 is less than the number of turns of the mutual inductance coil 108.

[0046] Specifically, by making the number of turns of the other part 1062 of the primary coil 106 less than the number of turns of the mutual inductance coil 108, the current in the mutual inductance coil 108 can be made less than the current in the primary coil 106. This allows the mutual inductance coil 108 to output the current in the primary coil 106 reduced according to the corresponding coil turns ratio as the mutual inductance current. Technicians can determine the current in the primary coil 106 by the mutual inductance current and the ratio of the number of turns of the other part 1062 of the primary coil 106 to the number of turns of the mutual inductance coil 108, so as to realize the monitoring and adjustment of the current in the primary coil 106. It can also reduce the possibility of excessive mutual inductance current damaging the corresponding current sampling equipment and improve the reliability of the magnetic device.

[0047] In one embodiment, the leakage inductance between a portion 1061 of the primary coil 106 and another portion 1062 of the primary coil 106 is used as a resonant inductor, and the two ends of the primary coil 106 are used as the two ends of the resonant inductor. In one embodiment, the two ends of the secondary coil 107 are used to output the secondary voltage. In one embodiment, the two ends of the mutual inductance coil 108 are used to output the sampling current.

[0048] Specifically, the fifth magnetic element 105 is magnetically connected to the other end of the first magnetic element 101 through the first air gap 109, and / or, the fifth magnetic element 105 is magnetically connected to the other end of the second magnetic element 102 through the second air gap 110, and / or, the fifth magnetic element 105 is magnetically connected to the other end of the second magnetic element 102 through the third air gap 111.

[0049] For example, see Figure 2 , Figure 2 This is a schematic diagram of the equivalent magnetic circuit of an embodiment of the magnetic device of this application, as shown below. Figure 2 As shown, in this equivalent magnetic circuit, one end of the first reluctance 21 is connected to one end of the second reluctance 22 and one end of the third reluctance 23, the other end of the second reluctance 22 is connected to the positive pole of the first magnetic source 24, the negative pole of the first magnetic source 24 is connected to the positive pole of the third magnetic source 26, the other end of the third reluctance 23 is connected to the positive pole of the second magnetic source 25, the negative pole of the second magnetic source 25 is connected to the positive pole of the fourth magnetic source 27, and the other end of the first reluctance 21 is connected to the negative pole of the third magnetic source 26 and the negative pole of the fourth magnetic source 27.

[0050] Wherein, the first magnetic reluctance 21 is the magnetic reluctance in the magnetic circuit corresponding to the first air gap 109, the second magnetic reluctance 22 is the magnetic reluctance in the magnetic circuit corresponding to the second air gap 110, the third magnetic reluctance 23 is the magnetic reluctance in the magnetic circuit corresponding to the third air gap 111, the magnetomotive force of the first magnetic source 24 is the magnetomotive force in the magnetic circuit corresponding to a part 1061 of the primary coil 106, the magnetomotive force of the second magnetic source 25 is the magnetomotive force in the magnetic circuit corresponding to another part 1062 of the primary coil 106, the magnetomotive force of the third magnetic source 26 is the magnetomotive force in the magnetic circuit corresponding to the secondary coil 107, and the magnetomotive force of the fourth magnetic source 27 is the magnetomotive force in the magnetic circuit corresponding to the mutual inductance coil 108.

[0051] See Figure 3 , Figure 3 This is a schematic diagram of the structure of an embodiment of the equivalent circuit of the magnetic device of this application, as shown below. Figure 3 As shown, by performing a dual transformation on the above equivalent magnetic circuit, a corresponding equivalent circuit can be obtained. In this equivalent circuit, one end of the first inductor 31 is one end A1 of the primary coil, the other end of the first inductor 31 is connected to one end of the second inductor 32, the other end of the second inductor 32 is connected to one end of the third inductor 33, and the other end of the third inductor 33 is the other end A2 of the primary coil.

[0052] The two ends of the fourth inductor 34 are the two ends B1 and B2 of the secondary coil 107.

[0053] One end of the seventh inductor 37 is connected to one end of the fifth inductor 35 and one end of the sixth inductor 36, respectively, and the other end of the seventh inductor 37 is connected to the other end of the fifth inductor 35 and the other end of the sixth inductor 36, respectively.

[0054] The two ends of the eighth inductor 38 are C1 and C2 of the mutual inductance coil 108.

[0055] The inductance of the first inductor 31 can specifically be the leakage inductance between a portion 1061 and another portion 1062 of the primary coil 106, that is, the inductance of the resonant inductor. The number of turns of the second inductor 32 can be the number of turns of the other portion 1062 of the primary coil 106. The number of turns of the third inductor 33 and the seventh inductor 37 are both the number of turns of a portion 1061 of the primary coil 106. The number of turns of the fourth inductor 34 can be the number of turns of the secondary coil 107. The number of turns of the eighth inductor 38 can be the number of turns of the mutual inductance coil 108. The total inductance of the fifth inductor 35 and the sixth inductor 36 can be the magnetizing inductance of the primary coil 106.

[0056] Based on the above equivalent circuit, the magnetizing inductance and resonant inductance can be confirmed based on the input primary current and the collected mutual inductance current and secondary current. Then, when the reduction ratio of the magnetizing inductance, resonant inductance, and mutual inductance current relative to the primary current needs to be adjusted, adaptive adjustment can be achieved by adjusting the number of turns of each coil and the input primary current to ensure that the magnetic device can operate normally and meet the relevant needs of technicians.

[0057] This application also proposes a method for using a magnetic device, wherein the magnetic device is the same as the embodiment described above, in which the fifth magnetic element 105 is magnetically connected to the other end of the first magnetic element 101 through the first air gap 109, and / or the fifth magnetic element 105 is magnetically connected to the other end of the second magnetic element 102 through the second air gap 110, and / or the fifth magnetic element 105 is magnetically connected to the other end of the second magnetic element 102 through the third air gap 111.

[0058] The leakage inductance between a portion 1061 of the primary coil 106 and another portion 1062 of the primary coil 106 is used as a resonant inductor, and the two ends of the primary coil 106 are used as the two ends of the resonant inductor. In one embodiment, the two ends of the secondary coil 107 are used to output the secondary voltage. In one embodiment, the two ends of the mutual inductance coil 108 are used to output the sampling current.

[0059] The method of applying a magnetic device includes:

[0060] The magnetic capability of the magnetic device is adjusted based on at least one of the magnetic reluctance corresponding to the first air gap 109, the magnetic reluctance corresponding to the second air gap 110, and the magnetic reluctance corresponding to the third air gap 111.

[0061] Specifically, for any one of the first air gap 109, the second air gap 110, and the third air gap 111, by adjusting the width of the corresponding air gap, the magnetic reluctance of the corresponding air gap can be adjusted, thereby adjusting the relevant parameters of the equivalent magnetic circuit and equivalent circuit in the magnetic device, so as to adjust the relevant magnetic capabilities of the magnetic device, ensuring that the magnetic device can operate normally and meet the relevant needs of technicians.

[0062] Furthermore, the magnetic capability of the magnetic device can be adjusted based on at least one of the number of turns of a portion 1061 of the primary coil 106, the number of turns of another portion 1062 of the primary coil 106, the number of turns of the secondary coil 107, and the number of turns of the mutual inductance coil 108, without limitation herein.

[0063] In one embodiment, adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap 109, the magnetic reluctance corresponding to the second air gap 110, and the magnetic reluctance corresponding to the third air gap 111 includes:

[0064] The inductance value of the resonant inductor is determined or adjusted based on the magnetic reluctance corresponding to the first air gap 109 and the number of turns of a portion of the primary coil 106.

[0065] Specifically, when designing a magnetic device, the inductance value of the corresponding resonant inductor can be calculated based on the magnetic reluctance corresponding to the first air gap 109 and the number of turns of a portion 1061 of the primary coil 106. This determines whether the designed magnetic device meets the requirements. If it does not meet the requirements, the magnetic reluctance corresponding to the first air gap 109 and the number of turns of a portion 1061 of the primary coil 106 can be adjusted to affect the inductance value of the resonant inductor. If it meets the requirements, the adjustment can be stopped, and the design is completed.

[0066] In one example, the magnetic reluctance corresponding to the first air gap 109, the number of turns of a portion 1061 of the primary coil 106, and the inductance value of the resonant inductor satisfy the first formula:

[0067] The first formula is:

[0068] L1 = (Np1) 2 / R1

[0069] Where L1 is the inductance value of the resonant inductor, Np1 is the number of turns of a portion 1061 of the primary coil 106, and R1 is the magnetic reluctance corresponding to the first air gap 109.

[0070] Based on the above formula, the inductance value of the resonant inductor can be determined. As can be seen from the first formula, the inductance value of the resonant inductor can be adjusted by changing at least one of the number of turns of a portion 1061 of the primary coil 106 and the magnetic reluctance corresponding to the first air gap 109, so that the resonance capability of the magnetic device can meet the user's needs.

[0071] In one embodiment, adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap 109, the magnetic reluctance corresponding to the second air gap 110, and the magnetic reluctance corresponding to the third air gap 111 includes:

[0072] Based on the magnetic reluctance corresponding to the second air gap 110, the magnetic reluctance corresponding to the third air gap 111, and the number of turns of a portion 1061 of the primary coil 106, the inductance value of the excitation inductance of the primary coil 106 is determined or adjusted.

[0073] Specifically, when designing a magnetic device, the inductance value of the magnetizing inductance of the primary coil 106 can be calculated based on the magnetic reluctance corresponding to the second air gap 110, the magnetic reluctance corresponding to the third air gap 111, and the number of turns of a portion 1061 of the primary coil 106. This allows the determination of whether the designed magnetic device meets the requirements. If it does not meet the requirements, the magnetic reluctance corresponding to the second air gap 110, the magnetic reluctance corresponding to the third air gap 111, and the number of turns of a portion 1061 of the primary coil 106 can be adjusted to affect the inductance value of the magnetizing inductance of the primary coil 106. If the requirements are met, the adjustment can be stopped, and the design is completed.

[0074] In one example, the magnetic reluctance corresponding to the second air gap 110, the magnetic reluctance corresponding to the third air gap 111, the number of turns of a portion 1061 of the primary coil 106, and the magnetizing inductance of the primary coil 106 satisfy the second formula:

[0075] The second formula is:

[0076] L2=(Np1) 2 / R2

[0077] L3=(Np1) 2 / R3

[0078] 1 / L = 1 / L² + 1 / L³

[0079] Wherein, L is the inductance value of the magnetizing inductance of the primary coil 106, that is, the inductance value of the total inductance of the fifth inductor 35 and the sixth inductor 36, L2 is the inductance value of the magnetizing inductance of a part 1061 of the primary coil 106, L3 is the inductance value of the magnetizing inductance of another part 1062 of the primary coil 106, Np1 is the number of turns of a part 1061 of the primary coil 106, R2 is the magnetic reluctance corresponding to the second air gap 110, and R2 is the magnetic reluctance corresponding to the third air gap 111.

[0080] Based on the above formula, the inductance value of the magnetizing inductance of the primary coil 106 can be determined. As can be seen from the second formula, the inductance value of the magnetizing inductance of the primary coil 106 can be adjusted by changing at least one of the magnetic reluctance corresponding to the second air gap 110, the magnetic reluctance corresponding to the third air gap 111, and the number of turns of a portion 1061 of the primary coil 106, so that the magnetizing inductance of the primary coil 106 of the magnetic device can meet the user's needs.

[0081] In one embodiment, the method of applying a magnetic device further includes:

[0082] The current value of the output current of the primary coil 106 is determined based on the number of turns of a portion 1061 of the primary coil 106, the number of turns of the mutual inductance coil 108, and the current value of the output current of the mutual inductance coil 108.

[0083] The number of turns of a portion 1061 of the primary coil 106, the number of turns of the mutual inductance coil 108, the current value of the output current of the mutual inductance coil 108, and the current value of the output current of the primary coil 106 satisfy the third formula.

[0084] The third formula is:

[0085] Ic=(Np1 / Nc)*I1

[0086] Wherein, I1 is the current value output by the primary coil 106, Ic is the current value output by the mutual inductance coil 108, Np1 is the number of turns of a portion 1061 of the primary coil 106, and Nc is the number of turns of the mutual inductance coil 108.

[0087] Based on the above formula, the current value of the output current of the primary coil 106 or the current value of the output current of the mutual inductance coil 108 can be determined. As can be seen from the third formula, the ratio between the number of turns of a portion 1061 of the primary coil 106 and the number of turns of the mutual inductance coil 108 can be adjusted, thereby making the reduction ratio of the mutual inductance current relative to the primary current meet the user's needs, that is, making the mutual inductance capability of the magnetic device meet the user's needs.

[0088] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A magnetic device, characterized in that, include: First magnetic component; Second magnetic component; Third magnetic component; A fourth magnetic component is magnetically connected to one end of the first magnetic component, one end of the second magnetic component, and one end of the third magnetic component. The fifth magnetic component is magnetically connected to the other end of the first magnetic component, the other end of the second magnetic component, and the other end of the third magnetic component. A primary coil, a portion of which is wound around the second magnetic element, and another portion of which is wound around the third magnetic element; wherein, the ends of the primary coil and the other portion of which are respectively close to the fourth magnetic element are the same name ends, or, the ends of the primary coil and the other portion of which are respectively close to the fifth magnetic element are the same name ends. A secondary coil, which is wound around the second magnetic element; Mutual inductance coils, which are wound around the third magnetic element.

2. The magnetic device according to claim 1, characterized in that, The number of turns in another part of the primary coil is less than the number of turns in the mutual inductance coil.

3. The magnetic device according to claim 1 or 2, characterized in that, The leakage inductance between one part of the primary coil and another part of the primary coil is used as a resonant inductor, and the two ends of the primary coil are used as the two ends of the resonant inductor. And / or, the two ends of the secondary coil are used to output the secondary voltage; And / or, the two ends of the mutual inductance coil are used to output sampling current.

4. The magnetic device according to claim 3, characterized in that, The fifth magnetic component is magnetically connected to the other end of the first magnetic component through the first air gap. And / or, the fifth magnetic element is magnetically connected to the other end of the second magnetic element through the second air gap; And / or, the fifth magnetic element is magnetically connected to the other end of the second magnetic element through a third air gap.

5. A method for using a magnetic device, characterized in that, The magnetic device is the magnetic device as described in claim 4; The method includes: The magnetic capability of the magnetic device is adjusted based on at least one of the magnetic reluctance corresponding to the first air gap, the magnetic reluctance corresponding to the second air gap, and the magnetic reluctance corresponding to the third air gap.

6. The method according to claim 5, characterized in that, Adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap, the magnetic reluctance corresponding to the second air gap, and the magnetic reluctance corresponding to the third air gap includes: The inductance value of the resonant inductor is determined or adjusted based on the magnetic reluctance corresponding to the first air gap and the number of turns of a portion of the primary coil.

7. The method according to claim 6, characterized in that, The magnetic reluctance corresponding to the first air gap, the number of turns of a portion of the primary coil, and the inductance value of the resonant inductor satisfy the first formula: The first formula is: L1=(Np1) 2 / R1 Wherein, L1 is the inductance value of the resonant inductor, Np1 is the number of turns of a portion of the primary coil, and R1 is the magnetic reluctance corresponding to the first air gap.

8. The method according to claim 5, characterized in that, Adjusting the magnetic capability of the magnetic device based on at least one of the magnetic reluctance corresponding to the first air gap, the magnetic reluctance corresponding to the second air gap, and the magnetic reluctance corresponding to the third air gap includes: The inductance value of the magnetizing inductance of the primary coil is determined or adjusted based on the magnetic reluctance corresponding to the second air gap, the magnetic reluctance corresponding to the third air gap, and the number of turns of a portion of the primary coil.

9. The method according to claim 8, characterized in that, The magnetic reluctance corresponding to the second air gap, the magnetic reluctance corresponding to the third air gap, the number of turns of a portion of the primary coil, and the magnetizing inductance of the primary coil satisfy the second formula: The second formula is: L2=(Np1) 2 / R2 L3=(Np1) 2 / R3 1 / L = 1 / L² + 1 / L³ Wherein, L is the inductance value of the magnetizing inductance of the primary coil, L2 is the inductance value of the magnetizing inductance of a portion of the primary coil, L3 is the inductance value of the magnetizing inductance of another portion of the primary coil, Np1 is the number of turns of a portion of the primary coil, R2 is the reluctance corresponding to the second air gap, and R3 is the reluctance corresponding to the third air gap.

10. The method according to claim 5, characterized in that, The method further includes: The current value of the output current of the primary coil is determined based on the number of turns of a portion of the primary coil, the number of turns of the mutual inductance coil, and the current value of the output current of the mutual inductance coil. Wherein, the number of turns of a portion of the primary coil, the number of turns of the mutual inductance coil, the current value of the current output by the mutual inductance coil, and the current value of the current output by the primary coil satisfy the third formula; The third formula is: Ic=(Np1 / Nc)*I1 Wherein, I1 is the current value output by the primary coil, Ic is the current value output by the mutual inductance coil, Np1 is the number of turns of a portion of the primary coil, and Nc is the number of turns of the mutual inductance coil.

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