Electric reactor and inverter

Abstract

According to the scheme, the electric reactor comprises an electric reactor body and a transition terminal, the transition terminal comprises a first connecting part and a second connecting part which are connected, the first connecting part makes contact with a leading-out bus of the electric reactor body, and the first connecting part and the leading-out bus are made of the same material; the second connecting part is connected with the cable, the second connecting part and the cable are made of the same material, and the first connecting part and the second connecting part are made of different materials. According to the electric reactor, the first connecting part of the transition terminal is connected with the leading-out bus, the second connecting part is connected with the cable, the first connecting part and the second connecting part are made of different materials, electric connection of the leading-out bus and the cable which are made of different materials is achieved, and the problem of electrochemical corrosion of connection between metal made of different materials is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inverters, in particular to an electric reactor and an inverter. BACKGROUND

[0002] A photovoltaic inverter is a power conversion device applied to a new energy power generation system, which can convert direct current into alternating current. Currently, the electrical connection between the internal devices of the inverter adopts the traditional copper-copper connection mode. With the continuous development of the photovoltaic industry, the cost of the photovoltaic inverter is decreasing, and the power devices are gradually developing towards aluminum or other materials. The electric reactor is an essential power device in the inverter, and the outgoing bus of the electric reactor is electrically connected with the cable. There may be a case that the outgoing bus and the cable are made of different materials. Since there is an oxidation electrode reaction between the metals of different materials, electrochemical corrosion is likely to occur.

[0003] Therefore, how to solve the problem of electrochemical corrosion between metals of different materials has become a technical problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an electric reactor and an inverter to solve the problem of electrochemical corrosion between metals of different materials.

[0005] In order to achieve the above-mentioned purpose, the present application discloses the following technical solutions:

[0006] In a first aspect, the present application provides an electric reactor, comprising an electric reactor body and a transition terminal, the transition terminal comprising a first connecting part and a second connecting part connected together, the first connecting part being in contact with an outgoing bus of the electric reactor body, and the first connecting part being made of the same material as the outgoing bus;

[0007] The second connecting part is connected with a cable, the second connecting part being made of the same material as the cable, and the first connecting part and the second connecting part being made of different materials.

[0008] In some embodiments, the transition terminal is welded to the outgoing bus.

[0009] In some embodiments, the total area of the weld between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus.

[0010] In some embodiments, the first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part.

[0011] In some embodiments, the transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part.

[0012] In some embodiments, the first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are connected by welding.

[0013] In some embodiments, the transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part.

[0014] In some embodiments, the transition terminal and the busbar are connected by a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener.

[0015] In some embodiments, the second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with a second mounting hole, and the first connecting part is a layered structure arranged at the position opposite to the busbar relative to the second connecting part.

[0016] In some embodiments, the first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with a second mounting hole, and the first connecting part and the second connecting part are connected by welding.

[0017] In some embodiments, the busbar and the first connecting part are made of aluminum, and the second connecting part is made of copper.

[0018] In a second aspect, the application provides an inverter, comprising a DC / DC circuit, a BOOST inductor, a DC / AC circuit and an inverter inductor connected in sequence, wherein the BOOST inductor and the inverter inductor are the reactor as described in any one of the above.

[0019] As can be seen from the above technical solution, the reactor of the application is connected with the busbar through the first connecting part of the transition terminal and connected with the cable through the second connecting part, wherein the materials of the first connecting part and the second connecting part are different, the electrical connection of the busbar and the cable made of different materials is realized, and the problem of electrochemical corrosion between metals of different materials is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some examples or embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings, and the application can also be applied to other similar scenarios on the basis of the provided drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0021] Figure 1 A perspective view of a reactor according to an embodiment of the application;

[0022] Figure 2 A top perspective view of a transition terminal provided for an embodiment of the present application;

[0023] Figure 3 A bottom perspective view of a transition terminal provided for an embodiment of the present application;

[0024] Figure 4 A top perspective view of a transition terminal provided for an embodiment of the present application;

[0025] Figure 5 A Figure 4 sectional view of A-A section;

[0026] Figure 6 A perspective view of another reactor provided for an embodiment of the present application;

[0027] Figure 7 A top perspective view of another transition terminal provided for an embodiment of the present application;

[0028] Figure 8 A bottom perspective view of another transition terminal provided for an embodiment of the present application;

[0029] Figure 9 A top perspective view of another transition terminal provided for an embodiment of the present application;

[0030] Figure 10 A Figure 9 sectional view of B-B section;

[0031] Figure 11 A perspective view of a third reactor provided for an embodiment of the present application;

[0032] Figure 12 A top perspective view of a third transition terminal provided for an embodiment of the present application;

[0033] Figure 13 A bottom perspective view of a third transition terminal provided for an embodiment of the present application;

[0034] Figure 14 A top perspective view of a third transition terminal provided for an embodiment of the present application;

[0035] Figure 15 A Figure 14 sectional view of C-C section;

[0036] Figure 16 A perspective view of a fourth reactor provided for an embodiment of the present application;

[0037] Figure 17 A top perspective view of a fourth transition terminal provided for an embodiment of the present application;

[0038] Figure 18 Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application;

[0039] Figure 19 Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application;

[0040] Figure 20 Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application; Figure 19 Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application;

[0041] Figure 21 Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application;

[0042] Figure 4 is a bottom perspective view of a fourth transition terminal according to an embodiment of the present application;

[0043] 100 - reactor body; 110 - outgoing busbar;

[0044] 200 - transition terminal; 210 - first connecting part; 220 - second connecting part; 230 - first mounting hole; 240 - second mounting hole; 250 - fastener

[0045] 300 - cable. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. The described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0047] In order to solve the problem of electrochemical corrosion between metals of different materials, the structure of the reactor is specifically introduced in combination with the drawings:

[0048] Referring to Figures 1 to 20 In order to achieve the above purpose, the present application discloses the following technical solutions:

[0049] The present application provides a reactor 10, comprising a reactor body 100 and a transition terminal 200, the transition terminal 200 comprising a first connecting part 210 and a second connecting part 220 connected with each other, the first connecting part 210 being in contact with an outgoing busbar 110 of the reactor body 100, the first connecting part 210 being of the same material as the outgoing busbar 110; the second connecting part 220 being connected with a cable 300, the second connecting part 220 being of the same material as the cable 300, and the first connecting part 210 and the second connecting part 220 being of different materials.

[0050] The electric reactor 10 of the present application is connected with the outgoing busbar 110 through the first connecting part 210 of the transition terminal 200 and connected with the cable 300 through the second connecting part 220, wherein the material of the first connecting part 210 and the second connecting part 220 is different, realizing the electrical connection of the outgoing busbar 110 and the cable 300 with different materials, and solving the problem of electrochemical corrosion between metals with different materials.

[0051] It should be noted that the above-mentioned electric reactor 10 can be an aluminum electric reactor or a copper electric reactor. When it is an aluminum electric reactor, the outgoing busbar 110 is made of aluminum material; when it is a copper electric reactor, the outgoing busbar 110 is made of copper material. The outgoing busbar 110 can be led out from the winding original conducting wire of the electric reactor body 100, or connected with other size busbar by welding or mechanical fastening structure.

[0052] Referring to Figures 1 to 10 , the transition terminal 200 is welded with the outgoing busbar 110 in the illustration. The total welding area between the first connecting part 210 and the outgoing busbar 110 is greater than 2 times the cross-sectional area of the outgoing busbar 110. In this way, the connection strength between the first connecting part 210 and the outgoing busbar 110 can be improved. Among them, the welding seam between the welding connection is a V-shaped welding seam, and the number thereof can be at least two sides such as 4 sides, 3 sides, 2 sides, etc.

[0053] In some examples, the first connecting part 210 and the second connecting part 220 are arranged in a stacked manner along the thickness direction, as shown in Figures 1 to 5 , that is, the first connecting part 210 and the second connecting part 220 are arranged in layers, and the thickness of the second connecting part 220 is less than the thickness of the first connecting part 210. For example, the thickness of the second connecting part 220 is less than 50% of the total thickness of the transition terminal 200. In particular, when the second connecting part 220 is made of copper, the use of copper material can be reduced, and the production cost of the transition terminal 200 can be reduced.

[0054] In order to facilitate the understanding of the technical scheme of the present application, the following definitions are made. The transition terminal 200 has a length direction, a width direction and a thickness direction, wherein the length direction corresponds to the X direction in the rectangular coordinate system in the illustration, the width direction corresponds to the Y direction of the rectangular coordinate system, and the thickness direction corresponds to the Z direction of the rectangular coordinate system. The length direction described below is the length direction of the transition terminal 200, and the thickness direction is also the thickness direction of the transition terminal 200.

[0055] The above-mentioned transition terminal 200 can be connected with the cable 300 through the fastener 250, and the transition terminal 200 is provided with a first mounting hole 230 for mounting the cable 300, or in some examples, the transition terminal 200 is provided with a mounting part for connecting with the cable 300.

[0056] The first connecting portion 210 and the second connecting portion 220 are arranged in layers, and the first mounting hole 230 penetrates the first connecting portion 210 and the second connecting portion 220, as shown in Figure 5 .

[0057] In some examples, the first connecting portion 210 and the second connecting portion 220 are arranged along the length direction, and the first connecting portion 210 and the second connecting portion 220 are connected by welding, as shown in Figures 6 to 10 , for example, by friction welding, ultrasonic welding, or other welding methods. The transition terminal 200 is provided with the first mounting hole 230 for mounting the cable 300, and the first mounting hole 230 penetrates the second connecting portion 220.

[0058] The above describes the structure of the transition terminal 200 when the transition terminal 200 is connected to the outgoing busbar 110 by welding, and in addition, the transition terminal 200 is in the form of a straight plate, a bent plate, or an arc-shaped plate, Figures 1 to 10 , the transition terminal 200 is in the form of a bent plate to be suitable for the cable 300 wiring.

[0059] The following transition terminal 200 is connected to the outgoing busbar 110 by a fastener 250, as shown in Figures 11 to 20 , one end of the transition terminal 200 is provided with a second mounting hole 240 for mounting the fastener 250, the other end of the transition terminal 200 is mounted with the cable 300, the fastener 250 is connected to the outgoing busbar 110 through the second mounting hole 240, and the other end of the transition terminal 200 is welded to the cable 300, for example, by friction welding, ultrasonic welding, or other welding methods.

[0060] In some examples, the second connecting portion 220 forms the whole of the transition terminal 200, as shown in Figures 11 to 15 , one end of the second connecting portion 220 is provided with the second mounting hole 240, and the other end of the second connecting portion 220 is friction-welded to the cable 300; the first connecting portion 210 is in the form of a layered structure arranged at a position opposite to the outgoing busbar 110 relative to the second connecting portion 220.

[0061] The first connecting portion 210 is connected to the second connecting portion 220 by welding, and further, the first connecting portion 210 is connected to the second connecting portion 220 by friction welding, friction welding, ultrasonic welding, or other welding methods.

[0062] In some examples, the first connecting portion 210 and the second connecting portion 220 are arranged along the length direction, as shown in Figures 16 to 20 , the first connecting portion 210 is provided with the second mounting hole 240, and the second connecting portion 220 is friction-welded to the cable 300; the first connecting portion 210 and the second connecting portion 220 are friction-welded.

[0063] The above reactor 10 is an aluminum reactor, at this time, the lead-out busbar 110 and the first connecting part 210 are aluminum materials, and the second connecting part 220 is a copper material. Of course, when the reactor 10 is a copper reactor, the lead-out busbar 110 and the first connecting part 210 are copper materials, and the second connecting part 220 is an aluminum material.

[0064] As shown in Figure 21 The present application provides an inverter, comprising a DC / DC circuit 20, a BOOST inductor 10a, a DC / AC circuit 30 and an inverter inductor 1b connected in sequence, wherein the BOOST inductor 10a and the inverter inductor 10b are the reactors as claimed in any one of the above. Since the above reactors have the above effects, the inverter comprising the above reactors has the corresponding effects, which will not be described here.

[0065] It should be noted that the structures of the transition terminals of the BOOST inductor 10a and the inverter inductor 1b are similar, and the corresponding reactor bodies are different, which will not be described here.

[0066] The present application does not specifically limit the specific application scenarios of the inverter, for example, it can be applied to a photovoltaic power generation scene, the input end of the inverter is used to connect a photovoltaic array, for boosting the unstable direct current output by the photovoltaic array into a stable direct current, and converting the stable direct current into alternating current to provide for an alternating current load or to perform grid-connected power generation.

[0067] Herein, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0068] In the description of the embodiments of the present application, unless otherwise specified, "or" means or, for example, A, B can mean A or B; the "and, or" in this paper only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and, or B, which can mean that A exists alone, A and B exist together, and B exists alone.

[0069] It should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0070] The above description is only the preferred embodiment of the present application and the explanation of the technical principles of the application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. The application scope involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A reactor, characterized by The transition terminal includes a first connecting part and a second connecting part connected to each other, the first connecting part is in contact with the outgoing bus of the reactor body, and the first connecting part is made of the same material as the outgoing bus; The second connecting part is connected to the cable, the second connecting part is made of the same material as the cable, and the first connecting part and the second connecting part are made of different materials.

2. The reactor of claim 1, wherein The transition terminal is welded to the outgoing bus.

3. The reactor of claim 2, wherein The total welding area between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus.

4. The reactor of any one of claims 1 to 3, characterized in that The first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part.

5. The reactor of claim 4, wherein, The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part.

6. The reactor of any one of claims 1 to 3, characterized in that The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are welded to each other.

7. The reactor of claim 6, wherein The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part.

8. A reactor as claimed in any one of claims 1 to 3, characterised in that The transition terminal is connected to the outgoing bus through a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener.

9. The reactor of claim 8, wherein, The second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with the second mounting hole, and the first connecting part is a layered structure arranged at a position opposite to the outgoing bus of the second connecting part.

10. The reactor of claim 8, wherein, The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with the second mounting hole, and the first connecting part and the second connecting part are welded to each other.

11. The reactor of any one of claims 1, 2, 3, 5, 7, 9 and 10, characterized in that, The outgoing bus and the first connecting part are made of aluminum, and the second connecting part is made of copper.

12. An inverter, characterized by The transition terminal includes a first connecting part and a second connecting part connected to each other, the first connecting part is in contact with the outgoing bus of the reactor body, and the first connecting part is made of the same material as the outgoing bus; The second connecting part is connected to the cable, the second connecting part is made of the same material as the cable, and the first connecting part and the second connecting part are made of different materials. The transition terminal is welded to the outgoing bus. The total welding area between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus. The first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are welded to each other. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part. The transition terminal is connected to the outgoing bus through a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener. The second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with the second mounting hole, and the first connecting part is a layered structure arranged at a position opposite to the outgoing bus of the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with the second mounting hole, and the first connecting part and the second connecting part are welded to each other. The outgoing bus and the first connecting part are made of aluminum, and the second connecting part is made of copper. The transition terminal includes a first connecting part and a second connecting part connected to each other, the first connecting part is in contact with the outgoing bus of the reactor body, and the first connecting part is made of the same material as the outgoing bus; The second connecting part is connected to the cable, the second connecting part is made of the same material as the cable, and the first connecting part and the second connecting part are made of different materials. The transition terminal is welded to the outgoing bus. The total welding area between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus. The first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are welded to each other. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part. The transition terminal is connected to the outgoing bus through a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener. The second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with the second mounting hole, and the first connecting part is a layered structure arranged at a position opposite to the outgoing bus of the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with the second mounting hole, and the first connecting part and the second connecting part are welded to each other. The outgoing bus and the first connecting part are made of aluminum, and the second connecting part is made of copper. The transition terminal includes a first connecting part and a second connecting part connected to each other, the first connecting part is in contact with the outgoing bus of the reactor body, and the first connecting part is made of the same material as the outgoing bus; The second connecting part is connected to the cable, the second connecting part is made of the same material as the cable, and the first connecting part and the second connecting part are made of different materials. The transition terminal is welded to the outgoing bus. The total welding area between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus. The first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are welded to each other. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part. The transition terminal is connected to the outgoing bus through a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener. The second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with the second mounting hole, and the first connecting part is a layered structure arranged at a position opposite to the outgoing bus of the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with the second mounting hole, and the first connecting part and the second connecting part are welded to each other. The outgoing bus and the first connecting part are made of aluminum, and the second connecting part is made of copper. The transition terminal includes a first connecting part and a second connecting part connected to each other, the first connecting part is in contact with the outgoing bus of the reactor body, and the first connecting part is made of the same material as the outgoing bus; The second connecting part is connected to the cable, the second connecting part is made of the same material as the cable, and the first connecting part and the second connecting part are made of different materials. The transition terminal is welded to the outgoing bus. The total welding area between the first connecting part and the outgoing bus is greater than 2 times the cross-sectional area of the outgoing bus. The first connecting part and the second connecting part are arranged in a stacked manner along the thickness direction, and the thickness of the second connecting part is less than the thickness of the first connecting part. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the first connecting part and the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, and the first connecting part and the second connecting part are welded to each other. The transition terminal is provided with a first mounting hole for mounting the cable, and the first mounting hole penetrates the second connecting part. The transition terminal is connected to the outgoing bus through a fastener, and one end of the transition terminal is provided with a second mounting hole for mounting the fastener. The second connecting part forms the whole of the transition terminal, one end of the second connecting part is provided with the second mounting hole, and the first connecting part is a layered structure arranged at a position opposite to the outgoing bus of the second connecting part. The first connecting part and the second connecting part are arranged along the length direction of the transition terminal, the first connecting part is provided with the second

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