Differential and common mode integrated inductor and photovoltaic energy storage integrated machine

Abstract

The invention provides a differential and common mode integrated inductor and a photovoltaic energy storage all-in-one machine, the differential and common mode integrated inductor comprises an annular magnetic core structure, a plurality of independent windings are wound on the annular magnetic core structure, and the plurality of windings respectively correspond to a plurality of input paths; the I-shaped magnetic core structure is arranged in the annular magnetic core structure, and the two ends of the I-shaped magnetic core structure are connected with the inner side of the annular magnetic core structure; wherein the annular magnetic core structure is used for forming common mode inductors corresponding to a plurality of windings, and the I-shaped magnetic core structure is used for forming differential mode inductors corresponding to a plurality of windings, so that the problem of common mode failure caused by inconsistent impedance of multiple paths of group strings can be solved in a limited space, and efficient EMI suppression is realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of photovoltaic technology, and in particular to a differential and common mode integrated inductor and a photovoltaic energy storage integrated machine. Background Art

[0002] In a photovoltaic energy storage system, the current of multiple photovoltaic inputs usually needs to be suppressed by common-mode inductors to ensure the stability and safety of the system. However, in the prior art, due to the inconsistent impedance of multiple PV inputs, the current of each input will be different, which will cause the common-mode inductor to fail and cannot effectively suppress EMI conduction. In addition, in a high-power photovoltaic energy storage integrated machine, the internal space is small, which limits the addition of filtering circuits, making it difficult to completely solve the EMI conduction problem, affecting system performance. Summary of the invention

[0003] The embodiments of the present application provide a differential common-mode integrated inductor and a photovoltaic energy storage integrated machine, which can solve the common-mode failure problem caused by inconsistent impedance of multiple strings in a limited space and achieve efficient EMI suppression.

[0004] To achieve the above-mentioned purpose, the first aspect of an embodiment of the present application provides a differential common-mode integrated inductor, including: an annular magnetic core structure, on which a plurality of independent windings are wound, and the plurality of windings respectively correspond to a plurality of input paths; an I-type magnetic core structure, which is arranged inside the annular magnetic core structure, and the two ends are respectively connected to the inner side of the annular magnetic core structure; wherein the annular magnetic core structure is used to form a common-mode inductor corresponding to the plurality of windings, and the I-type magnetic core structure is used to form a differential-mode inductor corresponding to the plurality of windings.

[0005] In some embodiments, the I-type magnetic core structure includes one or more I-type magnetic cores.

[0006] In some embodiments, the I-type magnetic core structure includes a plurality of the I-type magnetic cores, the plurality of the I-type magnetic cores are arranged side by side, and the plurality of the I-type magnetic cores are parallel to each other.

[0007] In some embodiments, the I-type magnetic core structure includes at least three I-type magnetic cores, and the spacing between the multiple I-type magnetic cores is the same.

[0008] In some embodiments, the annular magnetic core structure is bilaterally symmetrical and centrally symmetrical, and the multiple I-type magnetic cores are symmetrically arranged with the center of the annular magnetic core structure as a reference, and the same distance is reserved on both sides of the annular magnetic core structure.

[0009] In some embodiments, the I-type magnetic core structure includes n I-type magnetic cores, and (2n+2) windings are wound around the annular magnetic core structure.

[0010] In some embodiments, the head end and the tail end of each of the I-type magnetic cores are connected between the plurality of windings, and the current direction of each winding is the same.

[0011] In some embodiments, the I-type magnetic core structure includes a first I-type magnetic core, a second I-type magnetic core and a third I-type magnetic core, and the windings include a first input winding, a second input winding, a third input winding, a fourth input winding, a first output winding, a second output winding, a third output winding and a fourth output winding; wherein the head end of the first I-type magnetic core is connected to the first input winding and the second input winding, and the tail end is connected to the first output winding and the second output winding; the head end of the second I-type magnetic core is connected to the second input winding and the third input winding, and the tail end is connected to the second output winding and the third output winding; the head end of the third I-type magnetic core is connected to the third input winding and the fourth input winding, and the tail end is connected to the third output winding and the fourth output winding.

[0012] In some embodiments, the annular magnetic core structure is a U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring, the I-type magnetic core structure is an I-type manganese core ferrite magnetic core, and the winding is an enameled wire.

[0013] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application provides a photovoltaic energy storage integrated machine, comprising a differential common mode integrated inductor as described in any one of the embodiments of the above-mentioned first aspect.

[0014] The embodiments of the present application provide a differential common mode integrated inductor and a photovoltaic energy storage integrated machine, which have at least the following beneficial effects: The present application provides a differential common mode integrated inductor, which combines a ring core structure with an I-type core structure, and a plurality of independent windings are wound on the ring core structure, each winding corresponds to an input path, and is used to process multiple input currents; the I-type core structure is arranged inside the ring core, and the two ends are respectively connected to the inner side of the ring core, which is used to enhance the high-frequency impedance and reduce the attenuation of the high-frequency common mode inductance, so that the inductor can not only form a common mode inductance corresponding to a plurality of windings to suppress low-frequency common mode noise, but also form a differential mode inductance at the same time to ensure the differential mode signal. Normal transmission; It can be understood that the annular core structure provides a higher initial magnetic permeability, which can effectively attenuate impedance in the low frequency band, while the I-type core structure exhibits a lower magnetic permeability in the high frequency band, which enhances the high frequency impedance and reduces the attenuation of the high frequency common mode inductance, so that the inductor can effectively suppress EMI in a wide frequency range, and solves the common mode failure problem caused by inconsistent impedance of multiple strings mentioned in the background technology; in addition, the present application can effectively reduce the volume and cost of the inductor by integrating common mode and differential mode inductors into one, thereby solving the common mode failure problem caused by inconsistent impedance of multiple strings in a limited space and achieving efficient EMI suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the connection relationship of a differential and common mode integrated inductor provided in one embodiment of the present application;

[0016] Figure 2 A schematic diagram of another connection relationship of a differential and common mode integrated inductor provided in an embodiment of the present application.

[0017] Reference numerals:

[0018] 110. Ring core structure; 120. I-type core structure; 121. First I-type core; 122. Second I-type core; 123. Third I-type core; 130. Winding; 131. First input winding; 132. Second input winding; 133. Third input winding; 134. Fourth input winding; 135. First output winding; 136. Second output winding; 137. Third output winding; 138. Fourth output winding. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] In some embodiments, although the functional modules are divided in the system schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms first, second, etc. in the specification, claims and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0021] In addition, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or the two can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium.

[0022] In the description of the embodiments of the present application, the description of reference terms "one embodiment / implementation", "another embodiment / implementation" or "certain embodiments / implementations", "in the above embodiments / implementations", etc. means that the specific features, structures, materials or characteristics described in combination with the implementation or example are included in at least two embodiments or implementations disclosed in the present application. In the disclosure of this application, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that in the flowchart.

[0023] Currently, in photovoltaic energy storage systems, the current of multiple photovoltaic inputs usually needs to be suppressed by common-mode inductors to ensure the stability and safety of the system. However, in the prior art, due to the inconsistent impedance of multiple PV inputs, the current of each input will be different, which will cause the common-mode inductor to fail and cannot effectively suppress EMI conduction. In addition, in high-power photovoltaic storage integrated machines, the internal space is small, which limits the addition of filtering circuits, making it difficult to completely solve the EMI conduction problem, affecting system performance.

[0024] Based on this, the embodiments of the present application provide a differential common-mode integrated inductor and a photovoltaic energy storage integrated machine, which can solve the common-mode failure problem caused by inconsistent impedance of multiple strings in a limited space and achieve efficient EMI suppression.

[0025] The present application scheme is further described below in conjunction with the accompanying drawings.

[0026] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the connection relationship of a differential and common mode integrated inductor provided in one embodiment of the present application; Figure 2 A schematic diagram of another connection relationship of a differential and common mode integrated inductor provided in an embodiment of the present application.

[0027] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a differential common-mode integrated inductor, comprising: a ring-shaped magnetic core structure 110, on which a plurality of independent windings 130 are wound, and the plurality of windings 130 correspond to a plurality of input paths respectively; an I-type magnetic core structure 120, which is arranged inside the ring-shaped magnetic core structure 110, and the two ends are respectively connected to the inner side of the ring-shaped magnetic core structure 110; wherein the ring-shaped magnetic core structure 110 is used to form a common-mode inductor corresponding to the plurality of windings 130, and the I-type magnetic core structure 120 is used to form a differential-mode inductor corresponding to the plurality of windings 130, The present application combines an annular magnetic core structure 110 with an I-type magnetic core structure 120, and a plurality of independent windings 130 are wound on the annular magnetic core structure 110, each winding 130 corresponds to an input path, and is used to process multiple input currents; the I-type magnetic core structure 120 is arranged inside the annular magnetic core, and the two ends are respectively connected to the inner side of the annular magnetic core, which is used to enhance the high-frequency impedance and reduce the attenuation of the high-frequency common-mode inductance, so that the inductor can not only form a common-mode inductance corresponding to the plurality of windings 130 to suppress low-frequency common-mode noise, but also form a differential-mode inductance at the same time to ensure the normal transmission of the differential-mode signal.

[0028] It can be understood that the annular core structure 110 provides a higher initial magnetic permeability and can effectively attenuate impedance in the low frequency band, while the I-type core structure 120 exhibits a lower magnetic permeability in the high frequency band, enhances the high frequency impedance, and reduces the attenuation of the high frequency common mode inductance, so that the inductor can effectively suppress EMI in a wide frequency range, and solves the common mode failure problem caused by inconsistent impedance of multiple strings mentioned in the background technology; in addition, the present application can effectively reduce the volume and cost of the inductor by integrating common mode and differential mode inductors into one, thereby solving the common mode failure problem caused by inconsistent impedance of multiple strings in a limited space and achieving efficient EMI suppression.

[0029] In some embodiments, the annular core structure 110 is used to wind a plurality of independent windings 130, each winding 130 corresponding to an input path. Through these windings 130, the annular core structure 110 can form a common mode inductor corresponding to the plurality of windings 130, which is mainly used to suppress low-frequency common mode noise; the annular core structure 110 uses a U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring, which has a high initial magnetic permeability and can provide good attenuation impedance in the low frequency band, ensuring effective suppression of common mode noise;

[0030] In some embodiments, the annular magnetic core structure 110 is the basis of the entire inductor, and the I-type magnetic core structure 120 is arranged inside it, with both ends respectively connected to the inner side of the annular magnetic core structure 110, and multiple windings 130 are wound on the annular magnetic core structure 110. When current passes through these windings 130, a magnetic field is generated, and magnetic exchange occurs with the magnetic core to form inductive reactance. The complete annular design of the annular magnetic core structure 110 allows multiple windings 130 to be compactly arranged on one magnetic core, reducing the overall volume of the inductor and improving the power density.

[0031] like Figure 1 and Figure 2 As shown, in some embodiments, the I-type magnetic core structure 120 includes one or more I-type magnetic cores; wherein, it can be understood that the I-type magnetic core structure 120 includes one or more I-type magnetic cores, and the specific number is determined according to the requirements of the application scenario; for example, in low-power applications, a single I-type magnetic core can be used; in high-power applications, multiple I-type magnetic cores can be used to enhance high-frequency impedance.

[0032] like Figure 2 As shown, in some embodiments, the I-type magnetic core structure 120 includes multiple I-type magnetic cores, and the multiple I-type magnetic cores are arranged side by side and parallel to each other; it can be understood that the multiple I-type magnetic cores are arranged side by side and parallel to each other to optimize the transfer efficiency of the magnetic flux; for example, three I-type magnetic cores can be arranged side by side to ensure uniform magnetic field distribution and stable electromagnetic performance.

[0033] like Figure 2 As shown, in some embodiments, the I-type magnetic core structure 120 includes at least three I-type magnetic cores, and the distances between the multiple I-type magnetic cores are the same; wherein, it can be understood that the spacings between the multiple I-type magnetic cores are the same to ensure uniform magnetic field distribution; for example, 3 I-type magnetic cores can be used with a spacing of 5 mm to optimize the magnetic flux transfer efficiency and magnetic field distribution.

[0034] like Figure 2 As shown, in some embodiments, the annular core structure 110 is bilaterally symmetrical and centrally symmetrical, and a plurality of I-type cores are symmetrically arranged with respect to the center of the annular core structure 110, and the same distance is reserved with respect to both sides of the interior of the annular core structure 110; wherein it can be understood that a plurality of I-type cores are symmetrically arranged with respect to the center of the annular core structure 110, and the same distance is reserved with respect to both sides of the interior of the annular core structure 110, for example, the outer diameter of the annular core structure 110 is 100 mm, and the inner diameter is 60 mm, and a distance of 10 mm is reserved between the I-type cores and both sides of the interior of the annular core structure 110, to ensure the symmetry and stability of the magnetic flux.

[0035] like Figure 2As shown, in some embodiments, the I-type magnetic core structure 120 includes n I-type magnetic cores, and (2n+2) windings 130 are wound on the annular magnetic core structure 110; it can be understood that when the number of I-type magnetic cores is 3, 8 windings 130 are wound on the annular magnetic core structure 110, namely, the first input winding 131, the second input winding 132, the third input winding 133, the fourth input winding 134, the first output winding 135, the second output winding 136, the third output winding 137 and the fourth output winding 138. The current direction of each winding 130 is the same, ensuring the normal transmission of the differential mode signal and the effective suppression of the common mode noise.

[0036] like Figure 2 As shown, in some embodiments, the head end and tail end of each I-type magnetic core are connected between multiple windings 130, and the current direction of each winding 130 is the same; it can be understood that the head end and tail end of each I-type magnetic core are connected between multiple windings 130 to ensure the normal transmission of differential mode signals; for example, the head end of the first I-type magnetic core 121 is connected to the first input winding 131 and the second input winding 132, and the tail end is connected to the first output winding 135 and the second output winding 136; the head end of the second I-type magnetic core 122 is connected to the second input winding 132 and the third input winding 133, and the tail end is connected to the second output winding 136 and the third output winding 137; the head end of the third I-type magnetic core 123 is connected to the third input winding 133 and the fourth input winding 134, and the tail end is connected to the third output winding 137 and the fourth output winding 138. This connection method ensures the normal transmission of differential mode signals and the effective suppression of common mode noise.

[0037] like Figure 2 As shown, in some embodiments, the I-type magnetic core structure 120 includes a first I-type magnetic core 121, a second I-type magnetic core 122 and a third I-type magnetic core 123, and the winding 130 includes a first input winding 131, a second input winding 132, a third input winding 133, a fourth input winding 134, a first output winding 135, a second output winding 136, a third output winding 137 and a fourth output winding 138; wherein the head end of the first I-type magnetic core 121 is connected to the first input winding 131 and the second input winding 132. 32 is connected, and the tail end is connected to the first output winding 135 and the second output winding 136; the head end of the second I-type magnetic core 122 is connected to the second input winding 132 and the third input winding 133, and the tail end is connected to the second output winding 136 and the third output winding 137; the head end of the third I-type magnetic core 123 is connected to the third input winding 133 and the fourth input winding 134, and the tail end is connected to the third output winding 137 and the fourth output winding 138, so as to ensure the normal transmission of the differential signal and the effective suppression of the common mode noise.

[0038] In some embodiments, the annular magnetic core structure 110 is a U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring, the I-shaped magnetic core structure 120 is an I-shaped manganese core ferrite magnetic core, and the winding 130 is an enameled wire. The number of turns and the diameter of the winding 130 can be adjusted according to the specific power requirements to adapt to different application scenarios; specifically, the annular magnetic core structure 110 can adopt a U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring, which has a high initial magnetic permeability and can provide good attenuation impedance in the low frequency band. The U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring is a part of the annular magnetic core structure 110, and multiple independent windings 130 are wound. The I-shaped magnetic core structure 120 is arranged on Inside, both ends are connected to the inner side of the annular core structure 110 respectively, and work together to realize the functions of common-mode and differential-mode inductance; the I-type core structure 120 can adopt an I-type manganese core ferrite core to provide low magnetic permeability at high frequencies, enhance high-frequency impedance, and reduce high-frequency common-mode inductance attenuation. The I-type manganese core ferrite core is a part of the I-type core structure 120, and is arranged inside the annular core structure 110, and both ends are connected to the inner side of the annular core structure 110 respectively; the winding 130 can be wound by enameled wire, and multiple windings 130 correspond to multiple input paths respectively. The number of turns and diameter of each winding 130 can be adjusted according to specific power requirements.

[0039] Among them, it can be understood that the I-type magnetic core structure 120 is mainly used to form differential mode inductors corresponding to multiple windings 130, ensuring the normal transmission of differential mode signals, and reducing the attenuation of high-frequency common mode inductance by enhancing high-frequency impedance, thereby effectively suppressing high-frequency common mode noise. The I-type magnetic core structure 120 adopts an I-type manganese core ferrite core to exhibit a lower magnetic permeability in the high-frequency band, and can provide a higher attenuation impedance in the high-frequency stage, ensuring that the inductor can effectively suppress EMI within a wide frequency range.

[0040] It is worth noting that the I-type magnetic core structure 120 is arranged inside the annular magnetic core structure 110, and the two ends are respectively connected to the inner side of the annular magnetic core structure 110. The I-type magnetic core structure 120 may include one or more I-type magnetic cores, and the multiple I-type magnetic cores are arranged side by side and parallel to each other to optimize the transfer efficiency of the magnetic flux, and the spacing between the multiple I-type magnetic cores is the same. The multiple I-type magnetic cores are symmetrically arranged with the center of the annular magnetic core structure 110 as the reference, and the same distance is reserved with the two sides of the annular magnetic core structure 110 to ensure uniform magnetic field distribution and stable electromagnetic performance; further, the head end and the tail end of each I-type magnetic core are connected between the multiple windings 130. When the current passes through the winding 130, the I-type magnetic core structure 120 participates in the transfer of magnetic flux to form a differential mode inductance.

[0041] In some embodiments, the winding 130 is made of enameled wire and is used to transmit current. Each winding 130 corresponds to an input path or an output path, and handles multiple input and output currents. When current passes through the winding 130, the winding 130 will generate a magnetic field and undergo magnetic exchange with the magnetic core to form an inductive reactance. Those skilled in the art can adjust the number and number of turns of the winding 130 according to specific power requirements to adapt to different application scenarios, so that the winding 130 can realize current transmission, and through interaction with the magnetic core, reduce the electromagnetic interference generated by the switch, thereby improving the EMI performance of the system.

[0042] It is understood that multiple windings 130 are wound on the annular core structure 110, and each winding 130 corresponds to an input path or an output path. In some embodiments, the annular core structure 110 is wound with (2n+2) windings 130, where n represents the number of I-type cores. The current direction of each winding 130 is the same, ensuring the normal transmission of differential mode signals and effective suppression of common mode noise. The head end and tail end of each I-type magnetic core are connected between multiple windings 130 to form a differential mode inductor. For example, the head end of the first I-type magnetic core 121 is connected to the first input winding 131 and the second input winding 132, and the tail end is connected to the first output winding 135 and the second output winding 136; the head end of the second I-type magnetic core 122 is connected to the second input winding 132 and the third input winding 133, and the tail end is connected to the second output winding 136 and the third output winding 137; the head end of the third I-type magnetic core 123 is connected to the third input winding 133 and the fourth input winding 134, and the tail end is connected to the third output winding 137 and the fourth output winding 138.

[0043] It is worth noting that the winding 130 not only includes an input winding and an output winding, the input winding is used to receive input current from multiple photovoltaic panels or strings, each input winding corresponds to an input path, and processes the corresponding input current. When the current passes through the input winding, the generated magnetic field undergoes magnetic exchange with the annular magnetic core structure 110 to form a common-mode inductor, thereby suppressing low-frequency common-mode noise; the output winding is used to transmit the processed current to subsequent circuits or loads, each output winding corresponds to an output path, and processes the corresponding output current. When the current passes through the output winding, the generated magnetic field undergoes magnetic exchange with the annular magnetic core structure 110, thereby further enhancing the effect of the common-mode inductor and suppressing low-frequency common-mode noise.

[0044] In some embodiments, the U-shaped racetrack type iron-based nano-amorphous magnetic core magnetic ring has a high initial magnetic permeability, can provide good attenuation impedance in the low frequency band, ensure effective suppression of common mode noise, and has a high saturation magnetic induction intensity, can maintain good magnetic properties under large current, and is suitable for high power applications; the U-shaped racetrack type iron-based nano-amorphous magnetic core magnetic ring is a part of the annular magnetic core structure 110, and multiple independent windings 130 are wound, and the I-type magnetic core structure 120 is arranged inside it, and the two ends are respectively connected to the inner side of the annular magnetic core structure 110, and work together to realize the functions of common mode and differential mode inductance.

[0045] In some embodiments, the enameled wire is used to wind the winding 130 and transmit current. The outer layer of insulating paint can prevent short circuits between the windings 130 and ensure the safe operation of the inductor. The enameled wire has good high temperature resistance and good flexibility, can maintain stable electrical properties in high temperature environments, and can be easily wound into complex shapes to adapt to different core structures and winding 130 layouts.

[0046] In some embodiments, the first I-type magnetic core 121 has a head end connected to the first input winding 131 and the second input winding 132, and a tail end connected to the first output winding 135 and the second output winding 136. When a differential mode current flows through, the current directions of the first input winding 131 and the first output winding 135 are opposite, and the current directions of the second input winding 132 and the second output winding 136 are also opposite, so a reverse current is generated on the I-type magnetic core to form a differential mode inductance; the second I-type magnetic core 122 has a head end connected to the second input winding 132 and the third input winding 133, and a tail end connected to the second output winding 136 and the third output winding 137. The current directions of the second input winding 132 and the second output winding 136 are opposite, and the current directions of the third input winding 133 and the third output winding 137 are also opposite, so a reverse current will be generated on the I-type magnetic core to form a differential mode inductor; the head end of the third I-type magnetic core 123 is connected to the third input winding 133 and the fourth input winding 134, and the tail end is connected to the third output winding 137 and the fourth output winding 138. The current directions of the third input winding 133 and the third output winding 137 are opposite, and the current directions of the fourth input winding 134 and the fourth output winding 138 are also opposite, so a reverse current will be generated on the I-type magnetic core to form a differential mode inductor.

[0047] To achieve the above-mentioned purpose, the second aspect of the embodiments of the present application provides a photovoltaic energy storage integrated machine, including a differential common mode integrated inductor as in any one of the embodiments in the first aspect above, and the differential common mode integrated inductor is applied to the photovoltaic energy storage integrated machine to process multiple input currents, reduce electromagnetic interference, and improve the stability and reliability of the system. For example, in a photovoltaic energy storage system, the inductor can process input currents from multiple photovoltaic panels, suppress EMI conduction, and ensure stable operation of the system; in addition, the inductor can also be used in other application scenarios that require efficient EMI suppression, such as industrial power supplies, communication equipment, etc.

[0048] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A differential common mode integrated inductor, characterized in that: include: An annular magnetic core structure, on which a plurality of independent windings are wound, and the plurality of windings respectively correspond to a plurality of input paths; An I-type magnetic core structure is arranged inside the annular magnetic core structure, and two ends are respectively connected to the inner side of the annular magnetic core structure; The annular magnetic core structure is used to form common-mode inductors corresponding to the plurality of windings, and the I-type magnetic core structure is used to form differential-mode inductors corresponding to the plurality of windings.

2. The differential common mode integrated inductor according to claim 1, characterized in that: The I-type magnetic core structure includes one or more I-type magnetic cores.

3. The differential common mode integrated inductor according to claim 2, characterized in that: The I-type magnetic core structure includes a plurality of I-type magnetic cores, the plurality of I-type magnetic cores are arranged side by side, and the plurality of I-type magnetic cores are parallel to each other.

4. The differential and common mode integrated inductor according to claim 3, characterized in that: The I-type magnetic core structure includes at least three I-type magnetic cores, and the spacings between the multiple I-type magnetic cores are the same.

5. The differential and common mode integrated inductor according to claim 4, characterized in that: The annular magnetic core structure is bilaterally symmetrical and centrally symmetrical. The multiple I-type magnetic cores are bilaterally symmetrically arranged with the center of the annular magnetic core structure as a reference, and the same distance is reserved with both sides of the annular magnetic core structure.

6. The differential and common mode integrated inductor according to claim 2, characterized in that: The I-type magnetic core structure includes n I-type magnetic cores, and (2n+2) windings are wound on the annular magnetic core structure.

7. The differential and common mode integrated inductor according to claim 6, characterized in that: The head end and the tail end of each of the I-shaped magnetic cores are connected between the multiple windings, and the current direction of each winding is the same.

8. The differential and common mode integrated inductor according to claim 1, characterized in that: The I-type magnetic core structure includes a first I-type magnetic core, a second I-type magnetic core and a third I-type magnetic core, and the winding includes a first input winding, a second input winding, a third input winding, a fourth input winding, a first output winding, a second output winding, a third output winding and a fourth output winding; Wherein, the head end of the first I-type magnetic core is connected to the first input winding and the second input winding, and the tail end is connected to the first output winding and the second output winding; The head end of the second I-shaped magnetic core is connected to the second input winding and the third input winding, and the tail end is connected to the second output winding and the third output winding; The head end of the third I-type magnetic core is connected to the third input winding and the fourth input winding, and the tail end is connected to the third output winding and the fourth output winding.

9. The differential and common mode integrated inductor according to claim 1, characterized in that: The annular magnetic core structure is a U-shaped racetrack iron-based nano-amorphous magnetic core magnetic ring, the I-type magnetic core structure is an I-type manganese core ferrite magnetic core, and the winding is an enameled wire.

10. A photovoltaic energy storage integrated machine, characterized in that: The invention comprises the differential and common mode integrated inductor as claimed in any one of claims 1 to 9.

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