Integrated micro inverter
By using an integrated micro-inverter with a frameless design and segmented magnetic block structure, the problems of numerous components, large energy loss, and low power density of traditional micro-transformers are solved, achieving efficient and compact power conversion.
Patent Information
- Application Number
- CN202423286921.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Traditional micro transformer designs suffer from problems such as a large number of components, high circuit complexity, high cost, and large energy loss and low power density due to improper handling of leakage flux, making it difficult to meet the miniaturization and high efficiency requirements of modern electronic devices.
The integrated micro inverter adopts a frameless design, utilizing a segmented magnetic block structure and a non-resonant inductor design to reduce leakage inductance, improve space utilization and winding copper wire filling rate, and directly wind the primary and secondary windings onto the magnetic blocks.
It achieves compactness and high-efficiency energy conversion of integrated micro-inverters, reduces leakage inductance effects, improves space utilization and energy conversion efficiency, and simplifies the assembly process.
Smart Images
Figure CN223859029U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of transformers, and particularly relates to an integrated micro-inverter. BACKGROUND
[0002] In the field of micro-inverter technology, its performance directly affects the volume, efficiency and stability of the entire inverter. However, the traditional micro-transformer has many limitations in design, which is difficult to meet the urgent needs of modern electronic equipment for miniaturization and high efficiency.
[0003] The traditional micro-transformer design usually designs the leakage inductance and the resonance inductance as two independent components, which increases the number of components in the circuit and also increases the complexity and cost of the circuit. Secondly, the magnetic core design in the traditional transformer adopts a ring or pot structure, which results in a large leakage magnetic column area and a long winding length around the outside, thereby increasing the resistance and inductance of the winding and reducing the efficiency of the transformer.
[0004] In addition, there is a lack of effective means to control the leakage inductance in the processing of the leakage magnetic column, resulting in large energy loss and low overall efficiency. Finally, the design of the traditional transformer fails to fully utilize the space of the magnetic core, thereby resulting in low power density and being difficult to meet the needs of modern electronic equipment for miniaturization, high efficiency and high power density. CONTENT OF THE INVENTION
[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide an integrated micro-inverter without a skeleton and resonance inductance.
[0006] The purpose of the present disclosure is achieved by the following technical solutions:
[0007] An integrated micro-inverter, comprising a first main shell, a second main shell, an electromagnetic induction assembly and an inverter connection terminal, the first main shell abutting the second main shell, the inverter connection terminal being connected to the second main shell, the first main shell being provided with a first accommodating cavity, the second main shell being provided with a second accommodating cavity, the first accommodating cavity being communicated with the second accommodating cavity, and the electromagnetic induction assembly being arranged inside the first accommodating cavity and the second accommodating cavity.
[0008] The electromagnetic induction assembly comprises a circular magnetic column, a first semi-circular ring magnetic block, a second semi-circular ring magnetic block, a primary winding and a secondary winding, the first semi-circular ring magnetic block and the second semi-circular ring magnetic block and the circular magnetic column surround to form a first annular groove respectively, and the first semi-circular ring magnetic block and the second semi-circular ring magnetic block and the second main shell surround to form a second annular groove respectively;
[0009] The primary winding is arranged in the first annular groove and wound around the circular magnetic column, the primary winding is electrically connected with the input end of the inverter connection terminal, the secondary winding is arranged in the second annular groove, the secondary winding is respectively abutted to the end face of the first half circular ring magnetic block and the second half circular ring magnetic block adjacent to the second main shell, and the primary winding is electrically connected with the output end of the inverter connection terminal.
[0010] The first half circular ring magnetic block comprises a first segmented magnetic block and a second segmented magnetic block, the first segmented magnetic block is abutted to the second segmented magnetic block, the second half circular ring magnetic block comprises a third segmented magnetic block and a fourth segmented magnetic block, and the third segmented magnetic block is abutted to the fourth segmented magnetic block.
[0011] In one of the embodiments, the first half circular ring magnetic block and the second half circular ring magnetic block are oppositely arranged, so that the first half circular ring magnetic block and the second half circular ring magnetic block jointly form an annular runway structure.
[0012] In one of the embodiments, the number of the secondary windings is multiple, and each of the secondary windings is arranged in the second annular groove.
[0013] In one of the embodiments, the first main shell is provided with a first fixed column adjacent to the end face of the second main shell, and the circular magnetic column is abutted to the first fixed column adjacent to the end face of the first main shell.
[0014] In one of the embodiments, the second main shell is provided with a second fixed column adjacent to the end face of the first main shell, and the circular magnetic column is abutted to the second fixed column adjacent to the end face of the second main shell.
[0015] In one of the embodiments, the first main shell further comprises a first magnetic column positioning boss and a second magnetic column positioning boss, the first half circular ring magnetic block is abutted to the first magnetic column positioning boss adjacent to the end face of the first main shell, and the second half circular ring magnetic block is abutted to the second magnetic column positioning boss adjacent to the end face of the first main shell.
[0016] In one of the embodiments, the second main shell further comprises a third magnetic column positioning boss and a fourth magnetic column positioning boss, the first half circular ring magnetic block is abutted to the third magnetic column positioning boss adjacent to the end face of the second main shell, and the second half circular ring magnetic block is abutted to the fourth magnetic column positioning boss adjacent to the end face of the second main shell.
[0017] In one of the embodiments, the first main shell is provided with a first wire groove, the second main shell is provided with a second wire groove, and the first wire groove is communicated with the second wire groove.
[0018] In one of the embodiments, the inverter connection terminal comprises a first lug and a base, the first lug is connected to the base, the first lug is provided with a first wire through hole, the electromagnetic induction assembly further comprises a secondary side output wire, one end of the secondary side output wire is connected to the secondary side winding, the other end of the secondary side output wire is arranged in the second wire slot and connected to the first wire through hole.
[0019] In one of the embodiments, the inverter connection terminal is provided with a second wire through hole, the electromagnetic induction assembly further comprises a primary side input wire, one end of the primary side input wire is connected to the primary side winding, the other end of the primary side input wire is arranged in the first wire slot and connected to the second wire through hole.
[0020] Compared with the prior art, the present disclosure has at least the following advantages:
[0021] 1. The integrated micro inverter described above, since the first half-ring magnetic block and the second half-ring magnetic block both adopt a segmented structure, the overall volume of the magnetic block and the length of the secondary side winding are reduced, the compactness and working efficiency of the integrated micro inverter are improved, at the same time, the air gap formed by the segmented structure breaks the continuity of the magnetic circuit and reduces the leakage inductance, so that the integrated micro inverter does not need to be additionally provided with a resonant inductor to compensate for the influence of the leakage inductance, thereby improving the space utilization rate inside the integrated micro inverter. In addition, the primary side winding and the secondary side winding are directly wound on the magnetic block, the winding copper wire filling rate of the integrated micro inverter is improved, and the energy conversion efficiency of the integrated micro inverter is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0023] Figure 1 It is a structural schematic diagram of the integrated micro inverter of an embodiment;
[0024] Figure 2 It is a partial exploded view of the integrated micro inverter shown in the figure; Figure 1
[0025] Figure 3 It is still another partial exploded view of the integrated micro inverter shown in the figure; Figure 1
[0026] Figure 4 Figure 2 The diagram shows a partial structural schematic of the electromagnetic induction component. Detailed Implementation
[0027] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.
[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0030] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:
[0031] like Figures 1 to 4 As shown, an integrated micro inverter 10 according to an embodiment of the present disclosure includes a first main housing 100, a second main housing 200, an electromagnetic induction component 300, and an inverter connection terminal 400. The first main housing 100 abuts against the second main housing 200, and the inverter connection terminal 400 is connected to the second main housing 200. The first main housing 100 has a first receiving cavity 1001, and the second main housing 200 has a second receiving cavity 2001. The first receiving cavity 1001 communicates with the second receiving cavity 2001, and the electromagnetic induction component 300 is disposed inside the first receiving cavity 1001 and the second receiving cavity 2001.
[0032] The electromagnetic induction assembly 300 comprises a circular magnetic column 310, a first half-circular ring magnetic block 320, a second half-circular ring magnetic block 330, a primary winding 340, and a secondary winding 350. The first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330 and the circular magnetic column 310 surround to form a first annular groove 3001, respectively. The first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330 and the second main shell 200 surround to form a second annular groove 3002, respectively.
[0033] The primary winding 340 is arranged in the first annular groove 3001 and wound on the circular magnetic column 310. The primary winding 340 is electrically connected with the input end of the inverter connection terminal 400. The secondary winding 350 is arranged in the second annular groove 3002. The secondary winding 350 abuts against the end face of the first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330 adjacent to the second main shell 200, respectively. The secondary winding 350 is electrically connected with the output end of the inverter connection terminal 400.
[0034] The first half-circular ring magnetic block 320 comprises a first segmented magnetic block 321 and a second segmented magnetic block 322. The first segmented magnetic block 321 abuts against the second segmented magnetic block 322. The second half-circular ring magnetic block 330 comprises a third segmented magnetic block 331 and a fourth segmented magnetic block 332. The third segmented magnetic block 331 abuts against the fourth segmented magnetic block 332.
[0035] In the embodiment, when the electric energy is input into the integrated micro inverter 10 through the primary winding 340, the magnetic field is generated when the electric energy flows in the primary winding 340, and then the electric energy is transmitted to the secondary winding 350 through the coupling effect of the first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330. Since the first half-circular ring magnetic block 320 comprises the first segmented magnetic block 321 and the second segmented magnetic block 322, and the second half-circular ring magnetic block 330 comprises the third segmented magnetic block 331 and the fourth segmented magnetic block 332, the first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330 form a block segmented structure, thereby reducing the overall volume of the first half-circular ring magnetic block 320 and the second half-circular ring magnetic block 330 and improving the compactness of the integrated micro inverter 10. At the same time, the segmented structure forms air gaps between the first segmented magnetic block 321 and the second segmented magnetic block 322 and between the third segmented magnetic block 331 and the fourth segmented magnetic block 332, which helps to reduce the leakage magnetic area and the length of the secondary winding 350, thereby reducing the leakage inductance and improving the working efficiency of the integrated micro inverter 10.
[0036] Specifically, since the segmented magnetic block structure is adopted, the air gap between the segmented magnetic blocks can break the continuity of the magnetic circuit, thereby reducing the leakage magnetic flux and causing the leakage inductance to be reduced. The internal part of the integrated micro inverter 10 does not need to be additionally provided with a resonant inductor to compensate for the influence of the leakage inductance, thereby improving the space utilization and structural compactness of the integrated micro inverter 10.
[0037] Further, due to the independent primary and secondary winding design, the stability of the excitation inductance is ensured, and the accuracy and efficiency of the electrical energy conversion are further improved. Moreover, compared with the traditional micro transformer, the integrated micro inverter 10 adopts a skeleton-free design, i.e., the primary winding 340 and the secondary winding 350 are directly wound on the magnetic column, thereby improving the winding copper line filling rate, further improving the conversion efficiency of the integrated micro inverter 10, and simplifying the internal structure of the integrated micro inverter 10 and reducing the manufacturing cost.
[0038] The integrated micro inverter 10 described above, since the first half-ring magnetic block 320 and the second half-ring magnetic block 330 both adopt a segmented structure, the overall volume of the magnetic block and the length of the secondary winding 350 are reduced, the compactness and working efficiency of the integrated micro inverter 10 are improved, at the same time, the air gap formed by the segmented structure breaks the continuity of the magnetic circuit and reduces the leakage inductance, so that the integrated micro inverter 10 does not need to additionally set a resonance inductor inside to compensate for the influence of the leakage inductance, thereby improving the space utilization rate inside the integrated micro inverter 10. In addition, the primary winding 340 and the secondary winding 350 are directly wound on the magnetic block, thereby improving the winding copper line filling rate of the integrated micro inverter 10, and further improving the energy conversion efficiency of the integrated micro inverter 10.
[0039] As shown in Figure 2 and Figure 4 , in one of the embodiments, the first half-ring magnetic block 320 and the second half-ring magnetic block 330 are oppositely arranged to form a ring-shaped runway structure together. In this embodiment, when electrical energy is input through the primary winding 340, the generated magnetic field spreads outward along the circular magnetic column 310 and is coupled to the ring-shaped runway structure formed by the first half-ring magnetic block 320 and the second half-ring magnetic block 330. Since the ring-shaped runway structure is beneficial to improve the uniformity of the magnetic field distribution, the magnetic field can maintain a high density and stability inside the ring-shaped runway, thereby enhancing the magnetic coupling effect between the primary winding 340 and the secondary winding 350. When the magnetic field is transmitted to the secondary winding 350 through the ring-shaped runway structure, it can more efficiently output electromotive force, thereby realizing the conversion and transmission of electrical energy.
[0040] As shown in Figure 2 , in one of the embodiments, the number of secondary windings 350 is multiple, and each secondary winding 350 is arranged in the second ring-shaped slot 3002. In this embodiment, since the number of secondary windings 350 is multiple, they can simultaneously sense the change of the magnetic field and generate electromotive force respectively. Thus, the integrated micro inverter 10 can simultaneously output multiple different or same electrical energy signals to meet the needs of various electronic devices or circuits, thereby improving the versatility and applicability of the integrated micro inverter 10.
[0041] As shown in Figure 2 and Figure 3 In one embodiment, the first main shell 100 is provided with a first fixing column 110 adjacent to the end face of the second main shell 200, and the circular magnetic column 310 is abutted against the first fixing column 110 adjacent to the end face of the first main shell 100. In this embodiment, when the circular magnetic column 310 is installed in the first accommodating cavity 1001, it is tightly abutted against the first fixing column 110 adjacent to the end face of the first main shell 100, thereby providing a firm support for the circular magnetic column 310, preventing displacement or shaking of the circular magnetic column 310 during operation, and ensuring accurate positioning between the circular magnetic column 310 and the first main shell 100, thereby ensuring that the primary winding 340 can be accurately wound on the circular magnetic column 310, and maximizing the use of the energy of the magnetic field. In addition, during the assembly of the integrated micro-inverter 10, only one end of the circular magnetic column 310 is abutted against the first fixing column 110, which can ensure the accuracy and stability of its position, without the need for additional fixing parts or complex assembly steps, thereby improving the assembly efficiency of the integrated micro-inverter 10.
[0042] As shown in Figure 2 and Figure 3 In one embodiment, the second main shell 200 is provided with a second fixing column 210 adjacent to the end face of the first main shell 100, and the circular magnetic column 310 is abutted against the second fixing column 210 adjacent to the end face of the second main shell 200. In this embodiment, when the circular magnetic column 310 is installed in the first accommodating cavity 1001 and the second accommodating cavity 2001, it is tightly abutted against the second fixing column 210 adjacent to the end face of the second main shell 200, thereby providing an additional support point for the circular magnetic column 310, effectively preventing displacement or tilting of the circular magnetic column 310 during operation due to vibration or external force, and ensuring accurate alignment between the circular magnetic column 310 and the second main shell 200, and allowing the magnetic field to smoothly pass through the circular magnetic column 310, thereby enabling the magnetic field to be efficiently coupled to the secondary winding 350 arranged in the second annular groove 3002. In addition, the design of the second fixing column 210 also cooperates with the first fixing column 110 to fix the circular magnetic column 310, thereby improving the stability of the circular magnetic column 310 and enhancing its anti-vibration ability during operation.
[0043] As shown in Figure 2 and Figure 3As shown, in one embodiment, the first main housing 100 further includes a first magnetic pillar positioning boss 120 and a second magnetic pillar positioning boss 130. The first semi-circular magnetic block 320 abuts against the first magnetic pillar positioning boss 120 near the end face of the first main housing 100, and the second semi-circular magnetic block 330 abuts against the second magnetic pillar positioning boss 130 near the end face of the first main housing 100. In this embodiment, when the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 are installed in the first receiving cavity 1001, the end faces of the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 adjacent to the first main housing 100 respectively abut tightly against the first magnetic post positioning boss 120 and the second magnetic post positioning boss 130, so that the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 form a tight connection with the first main housing 100 to prevent them from shifting or shaking during operation, thereby ensuring that the magnetic field can smoothly pass through the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 and efficiently couple with the primary winding 340 provided in the first annular groove 3001 and the secondary winding 350 provided in the second annular groove 3002, thereby improving the accuracy of magnetic coupling. Furthermore, during the assembly of the integrated micro inverter 10, the accuracy and stability of its position can be ensured simply by placing the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 against the first magnetic column positioning boss 120 and the second magnetic column positioning boss 130, respectively, without the need for additional adjustment or fixing steps, thus simplifying the assembly process of the integrated micro inverter 10.
[0044] like Figure 2 and Figure 3 As shown, in one embodiment, the second main housing 200 further includes a third magnetic post positioning boss 220 and a fourth magnetic post positioning boss 230. The first semi-circular magnetic block 320 abuts against the third magnetic post positioning boss 220 near the end face of the second main housing 200, and the second semi-circular magnetic block 330 abuts against the fourth magnetic post positioning boss 230 near the end face of the second main housing 200. In this embodiment, when the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 are installed in the first receiving cavity 1001 and the second receiving cavity 2001, the end faces of the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 adjacent to the second main housing 200 respectively tightly abut against the third magnetic post positioning boss 220 and the fourth magnetic post positioning boss 230, so that the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 form a tight connection with the second main housing 200, thereby preventing them from being displaced or tilted due to vibration or external force during operation, and ensuring their precise alignment with the second main housing 200. As a result, the magnetic field can smoothly pass through the first semi-circular magnetic block 320 and the second semi-circular magnetic block 330 and efficiently couple to the secondary winding 350, thereby improving the magnetic coupling effect and power conversion efficiency of the integrated micro inverter 10.
[0045] As Figure 2 and Figure 3 shown, in one embodiment, the first main shell 100 is provided with a first wire slot 1002, the second main shell 200 is provided with a second wire slot 2002, and the first wire slot 1002 is in communication with the second wire slot 2002. In this embodiment, when the primary winding 340 and the secondary winding 350 are wound on the circular magnetic column 310 and the first and second half-circular ring magnetic blocks 330 respectively, the outgoing wires of the primary winding 340 and the secondary winding 350 are smoothly led out through the first wire slot 1002 and the second wire slot 2002 respectively. And since the first wire slot 1002 and the second wire slot 2002 are in communication, the outgoing wires can be arranged and fixed in order through the first wire slot 1002 and the second wire slot 2002, thereby avoiding the situation of wire scattering or winding, and further enhancing the stability and reliability of the integrated micro-inverter 10.
[0046] As Figure 2 shown, in one embodiment, the inverter connection terminal 400 includes a first terminal post 410 and a base 420, the first terminal post 410 is connected to the base 420, the first terminal post 410 is provided with a first wire through hole 4101, the electromagnetic induction assembly 300 further includes a secondary output wire 360, one end of the secondary output wire 360 is connected to the secondary winding 350, the other end of the secondary output wire 360 is arranged through the second wire slot 2002 and connected to the first wire through hole 4101. In this embodiment, when the integrated micro-inverter 10 is working normally, the electric energy induced in the secondary winding 350 is transmitted through the secondary output wire 360. Specifically, one end of the secondary output wire 360 is tightly connected to the secondary winding 350, ensuring that the electric energy can be transmitted from the winding to the wire without loss. Subsequently, the other end of the secondary output wire 360 is arranged along the second wire slot 2002 provided on the second main shell 200, after the secondary output wire 360 passes through the second wire slot 2002, it continues to extend into the first terminal post 410 of the inverter connection terminal 400, so that the secondary output wire 360 is guided and fixed through the second wire slot 2002 and the first wire through hole 4101, thereby improving the continuity of electric energy transmission of the integrated micro-inverter 10.
[0047] As Figure 2As shown, in one of the embodiments, the second wire through hole 4002 is arranged in the inverter connection terminal 400, and the electromagnetic induction assembly 300 further comprises a primary input wire 370, one end of the primary input wire 370 is connected to the primary winding 340, and the other end of the primary input wire 370 is arranged in the first wire slot 1002 and connected to the second wire through hole 4002. In this embodiment, one end of the primary input wire 370 is firmly connected to the primary winding 340, and the other end of the primary input wire 370 is arranged in the second wire through hole 4002 arranged in the inverter connection terminal 400, so as to ensure that the electric energy can be efficiently transmitted to the primary winding 340 through the primary input wire 370; through the close cooperation of the primary input wire 370, the first wire slot 1002 and the second wire through hole 4002, the integrated micro inverter 10 realizes the electric energy transmission path from the external power supply to the primary winding 340, thereby ensuring the continuity and stability of the electric energy transmission, and further improving the reliability of the integrated micro inverter 10.
[0048] Compared with the prior art, the present disclosure has at least the following advantages:
[0049] 1. The integrated micro inverter 10 described above, since the first half-ring magnetic block 320 and the second half-ring magnetic block 330 both adopt a segmented structure, the overall volume of the magnetic block and the length of the secondary winding 350 are reduced, the compactness and working efficiency of the integrated micro inverter 10 are improved, at the same time, the air gap formed by the segmented structure breaks the continuity of the magnetic circuit and reduces the leakage inductance, so that the integrated micro inverter 10 does not need to additionally set a resonance inductor inside to compensate for the influence of the leakage inductance, thereby improving the space utilization rate inside the integrated micro inverter 10. In addition, the primary winding 340 and the secondary winding 350 are directly wound on the magnetic block, which improves the winding copper wire filling rate of the integrated micro inverter 10, and further improves the energy conversion efficiency of the integrated micro inverter 10.
[0050] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.
Claims
1. An integrated micro-inverter, comprising a first main housing, a second main housing, an electromagnetic induction assembly and an inverter connection terminal, the first main housing is abutted to the second main housing, the inverter connection terminal is connected to the second main housing, the first main housing is provided with a first accommodating cavity, the second main housing is provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, and the electromagnetic induction assembly is arranged inside the first accommodating cavity and the second accommodating cavity, characterized in that the electromagnetic induction assembly comprises a circular magnetic column, a first semi-circular annular magnetic block, a second semi-circular annular magnetic block, a primary winding and a secondary winding, the first semi-circular annular magnetic block and the second semi-circular annular magnetic block and the circular magnetic column surround to form a first annular groove respectively, and the first semi-circular annular magnetic block and the second semi-circular annular magnetic block and the second main housing surround to form a second annular groove respectively; the primary winding is arranged in the first annular groove and wound on the circular magnetic column, the primary winding is electrically connected with an input end of the inverter connection terminal, the secondary winding is arranged in the second annular groove, the secondary winding is abutted to end faces of the first semi-circular annular magnetic block and the second semi-circular annular magnetic block adjacent to the second main housing respectively, and the primary winding is electrically connected with an output end of the inverter connection terminal; the first semi-circular annular magnetic block comprises a first segmented magnetic block and a second segmented magnetic block, the first segmented magnetic block is abutted to the second segmented magnetic block, the second semi-circular annular magnetic block comprises a third segmented magnetic block and a fourth segmented magnetic block, and the third segmented magnetic block is abutted to the fourth segmented magnetic block; the first semi-circular annular magnetic block and the second semi-circular annular magnetic block are arranged oppositely, so that the first semi-circular annular magnetic block and the second semi-circular annular magnetic block jointly form an annular runway structure; the number of the secondary windings is a plurality, and each secondary winding is arranged in the second annular groove; the first main housing is provided with a first fixing column adjacent to an end face of the second main housing, and the circular magnetic column is abutted to the first fixing column adjacent to an end face of the first main housing; the second main housing is provided with a second fixing column adjacent to an end face of the first main housing, and the circular magnetic column is abutted to the second fixing column adjacent to an end face of the second main housing; the first main housing further comprises a first magnetic column positioning boss and a second magnetic column positioning boss, the first semi-circular annular magnetic block is abutted to the first magnetic column positioning boss adjacent to an end face of the first main housing, and the second semi-circular annular magnetic block is abutted to the second magnetic column positioning boss adjacent to an end face of the first main housing; the second main housing further comprises a third magnetic column positioning boss and a fourth magnetic column positioning boss, the first semi-circular annular magnetic block is abutted to the third magnetic column positioning boss adjacent to an end face of the second main housing, and the second semi-circular annular magnetic block is abutted to the fourth magnetic column positioning boss adjacent to an end face of the second main housing; the first main housing is provided with a first wire groove, the second main housing is provided with a second wire groove, and the first wire groove is communicated with the second wire groove. 2. The integrated micro-inverter of claim 1, wherein, 3. The integrated micro-inverter of claim 1, wherein, 4. The integrated micro-inverter of claim 1, wherein, 5. The integrated micro-inverter of claim 4, wherein, 6. The integrated micro-inverter of claim 1, wherein, 7. The integrated micro-inverter of claim 6, wherein, 8. The integrated micro-inverter of claim 1, wherein, 9. The integrated micro-inverter of claim 8, wherein, The inverter connecting terminal comprises a first lug and a base, the first lug is connected to the base, the first lug is provided with a first wire through hole, the electromagnetic induction assembly further comprises a secondary side output wire, one end of the secondary side output wire is connected to the secondary side winding, the other end of the secondary side output wire is arranged in the second wire slot and connected to the first wire through hole.
10. The integrated micro-inverter of claim 8, wherein, The inverter connecting terminal is provided with a second wire through hole, the electromagnetic induction assembly further comprises a primary side input wire, one end of the primary side input wire is connected to the primary side winding, the other end of the primary side input wire is arranged in the first wire slot and connected to the second wire through hole.