阅读说明：本技术 变流器 (Current transformer ) 是由 后士生 陆岩松 刘军 焦兵 于 2020-08-12 设计创作，主要内容包括：本发明公开一种变流器,其包含机柜、机侧开关、网侧开关、机侧电抗器、功率转换组件、网侧电抗器。机柜具有容置空间,机侧电抗器与机侧开关相邻设置,机侧电抗器的入线端与机侧开关相邻设置且电性耦接,功率转换组件的入线端与机侧电抗器的出线端相邻设置且电性耦接,网侧电抗器与网侧开关相邻设置,网侧电抗器的入线端与功率转换组件的出线端相邻设置且电性耦接,网侧电抗器的出线端与网侧开关相邻设置且电性耦接,机侧开关、网侧开关、机侧电抗器、网侧电抗器及功率转换组件皆设置于容置空间内。(The invention discloses a converter which comprises a machine cabinet, a machine side switch, a network side switch, a machine side reactor, a power conversion assembly and a network side reactor. The cabinet is provided with an accommodating space, the machine side reactor is arranged adjacent to the machine side switch, the incoming line end of the machine side reactor is arranged adjacent to the machine side switch and is electrically coupled with the machine side switch, the incoming line end of the power conversion assembly is arranged adjacent to the outgoing line end of the machine side reactor and is electrically coupled with the outgoing line end of the machine side reactor, the network side reactor is arranged adjacent to the network side switch, the incoming line end of the network side reactor is arranged adjacent to the outgoing line end of the power conversion assembly and is electrically coupled with the outgoing line end of the power conversion assembly, the outgoing line end of the network side reactor is arranged adjacent to the network side switch and is electrically coupled with the network side switch, and.)

1. A current transformer, comprising:

a cabinet having an accommodating space;

a machine side switch;

a network side switch;

the machine side reactor is arranged adjacent to the machine side switch and is provided with an incoming line end and an outgoing line end, and the incoming line end of the machine side reactor is arranged adjacent to the machine side switch and is electrically coupled with the machine side switch;

the power conversion assembly is provided with an incoming line end and an outgoing line end, and the incoming line end of the power conversion assembly is adjacent to and electrically coupled with the outgoing line end of the machine side reactor; and

the network side reactor is arranged adjacent to the network side switch and is provided with a line inlet end and a line outlet end, the line inlet end of the network side reactor is arranged adjacent to the line outlet end of the power conversion assembly and is electrically coupled with the line outlet end of the power conversion assembly, and the line outlet end of the network side reactor is arranged adjacent to the network side switch and is electrically coupled with the network side switch;

the machine side switch, the network side switch, the machine side reactor, the network side reactor and the power conversion assembly are all arranged in the accommodating space.

2. The converter according to claim 1 wherein the cabinet comprises a first side, a second side, a third side, a fourth side, a main incoming line end and a main outgoing line end, the first side and the second side are opposite to each other and extend along a plane formed by a first direction and a third direction, the third side and the fourth side are located between the first side and the second side, the third side and the fourth side are opposite to each other and extend along a plane formed by a second direction and the third direction, the main incoming line end is disposed on the first side, and the main outgoing line end is disposed on the second side.

3. The converter of claim 2, wherein the machine side switch has an incoming terminal and an outgoing terminal, the incoming terminal of the machine side switch is adjacent to the first side of the cabinet, and the incoming terminal of the machine side switch is electrically coupled with the main incoming terminal of the cabinet, and the outgoing terminal of the machine side switch is electrically coupled with the incoming terminal of the machine side reactor.

4. The converter according to claim 3, wherein the converter further comprises a first connection electrically connected between the incoming terminal of the machine side reactor and the outgoing terminal of the machine side switch, wherein the incoming terminal of the machine side reactor is disposed adjacent to the outgoing terminal of the machine side switch.

5. The converter as claimed in claim 4, wherein said first connection portion is formed of copper bar, aluminum bar, or copper aluminum composite bar.

6. The current transformer of claim 2, wherein the current transformer further comprises a second connection electrically connected between the outlet terminal of the machine side reactor and the inlet terminal of the power conversion assembly, wherein the second connection is parallel to the first direction.

7. The converter as claimed in claim 6, wherein said second connecting portion is formed of copper bar, aluminum bar, or copper aluminum composite bar.

8. The current transformer of claim 2, wherein the current transformer further comprises a third connection electrically connected between the outlet terminal of the power conversion component and the inlet terminal of the grid-side reactor, wherein the third connection is parallel to the first direction.

9. The converter of claim 8, wherein said third connecting portion is formed of copper bar, aluminum bar, or copper aluminum composite bar.

10. The converter of claim 2, wherein the grid side switch has an input terminal and an output terminal, the input terminal of the grid side switch is electrically coupled to the output terminal of the grid side reactor, the output terminal of the grid side switch is adjacent to the second side of the cabinet, and the output terminal of the grid side switch is electrically coupled to the main output terminal of the cabinet.

11. The converter of claim 10, wherein the converter further comprises a fourth connection electrically connected between the outlet terminal of the grid-side reactor and the inlet terminal of the grid-side switch, wherein the outlet terminal of the grid-side reactor is disposed adjacent to the inlet terminal of the grid-side switch.

12. The converter as claimed in claim 11, wherein said fourth connecting portion is formed of a copper bar, an aluminum bar, or a copper-aluminum composite bar.

13. The converter of claim 1, wherein the machine side reactor has a first side, a second side, a third side, a fourth side, a fifth side, and a sixth side, wherein the first side and the second side are oppositely disposed, the first side is adjacent to the grid side switch and the machine side switch, the second side is adjacent to the power conversion assembly, the third side and the fourth side are oppositely disposed, the fourth side is adjacent to the grid side reactor, the fifth side and the sixth side are oppositely disposed, the line inlet end of the machine side reactor is located at the fifth side or the first side, and the line inlet end of the machine side reactor is adjacent to a line formed by a junction of the fifth side and the first side; the outlet end of the machine side reactor is positioned on the sixth side or the second side, and the outlet end of the machine side reactor is adjacent to a side line formed at the joint of the sixth side and the second side.

14. The converter of claim 1, wherein the grid-side reactor has a first side, a second side, a third side, a fourth side, a fifth side, and a sixth side, wherein the first side and the second side are oppositely disposed, the first side is adjacent to the grid-side switch, the second side is adjacent to the power conversion assembly, the third side and the fourth side are oppositely disposed, the third side is adjacent to the machine-side reactor, the fifth side and the sixth side are oppositely disposed, the line inlet of the grid-side reactor is located at the sixth side or the second side, and the line inlet of the grid-side reactor is adjacent to a line edge formed by a junction of the sixth side and the second side; the wire outlet end of the network side reactor is positioned on the fifth side or the first side, and the wire outlet end of the network side reactor is adjacent to a side line formed at the junction of the fifth side and the first side.

Technical Field

The present invention relates to a converter, and more particularly, to a converter capable of reducing cost.

Background

In recent years, with the development of new energy technologies, such as wind power generators, the demand for power density of converters applied to wind power generators is increasing, and how to reduce the cost of converters with high power density is the focus of the development of new energy technologies at present.

The traditional wind power converter comprises a machine side switch, a machine side reactor, a power conversion assembly, a network side reactor and a network side switch, and the machine side switch, the machine side reactor, the power conversion assembly, the network side reactor and the network side switch are sequentially connected through a metal bar. However, in a conventional wind power converter cabinet, a machine side reactor and a grid side reactor are usually placed at the bottom of the cabinet side by side, a power conversion assembly is placed at the middle upper part of the cabinet, and a machine side switch and a grid side switch are respectively placed at a main power incoming end and a main power outgoing end of the cabinet, so that the connection mode of the metal bars is complex and the total length is long. Moreover, as the current and power increase, the width and thickness of the metal bars also increase accordingly, which leads to a significant increase in the cost of metal materials in the conventional wind power converter design, and thus increases the overall cost of the converter.

Disclosure of Invention

The object of the invention is to provide a converter which can reduce the cost.

In order to achieve the above object, an embodiment of the present invention provides a converter, which includes a cabinet, a machine side switch, a grid side switch, a machine side reactor, a power conversion module, and a grid side reactor. The cabinet is provided with an accommodating space. The machine side reactor is arranged adjacent to the machine side switch and is provided with an incoming line end and an outgoing line end, and the incoming line end of the machine side reactor is arranged adjacent to the machine side switch and is electrically coupled with the machine side switch. The power conversion assembly is provided with an incoming line end and an outgoing line end, and the incoming line end of the power conversion assembly is arranged adjacent to the outgoing line end of the machine side reactor and is electrically coupled with the outgoing line end of the machine side reactor. The network side reactor is arranged adjacent to the network side switch and is provided with a line inlet end and a line outlet end, the line inlet end of the network side reactor is arranged adjacent to the line outlet end of the power conversion assembly and is electrically coupled with the line outlet end of the power conversion assembly, and the line outlet end of the network side reactor is electrically coupled with the network side switch. The machine side switch, the network side switch, the machine side reactor, the network side reactor and the power conversion assembly are all arranged in the accommodating space.

The converter has the advantages that the incoming line end of the machine side reactor of the converter is arranged adjacent to and electrically coupled with the machine side switch, and the machine side reactor of the converter is adjacent to the machine side switch compared with the power conversion assembly, so that the connecting part for connecting the machine side reactor and the machine side switch can be shortened to the maximum extent; similarly, the line outlet end of the grid-side reactor of the converter is arranged adjacent to and electrically coupled with the grid-side switch, and the grid-side reactor of the converter is adjacent to the grid-side switch compared with the power conversion assembly, so that the connecting part for connecting the grid-side reactor and the grid-side switch can be shortened to the greatest extent.

Drawings

Fig. 1 is a schematic structural diagram of a current transformer according to the present invention.

Fig. 2 is a schematic perspective view of the converter shown in fig. 1 without showing a cabinet.

Fig. 3 is a schematic view of another view angle of the current transformer shown in fig. 1.

Fig. 4 is a schematic perspective view of the converter shown in fig. 3 without showing a cabinet.

Fig. 5 is a schematic circuit diagram of the current transformer shown in fig. 1.

Fig. 6 is a schematic perspective view of the cabinet of the converter shown in fig. 1.

Fig. 7 is a schematic perspective view of a machine side reactor of the current transformer shown in fig. 1.

Fig. 8 is a schematic perspective view of a grid-side reactor of the current transformer shown in fig. 1.

Fig. 9 is a schematic perspective view of a grid-side switch of the converter shown in fig. 1.

The reference numbers are as follows:

1: current transformer

2: machine cabinet

20: containing space

201: the first containing space

202: the second containing space

21: first side of the cabinet

22: second side of the cabinet

23: third side of the cabinet

24: fourth side of the cabinet

25: main incoming line terminal

26: main outlet terminal

27: fifth side of the cabinet

28: sixth side of the cabinet

29: frame body

3: machine side switch

31: incoming line terminal of machine side switch

32: wire outlet terminal of machine side switch

4: side reactor

41: wire inlet end of machine side reactor

42: wire outlet end of machine side reactor

43: first side of machine side reactor

44: second side of machine side reactor

45: third side of machine side reactor

46: fourth side of machine side reactor

47: fifth side of machine side reactor

48: sixth side of machine side reactor

5: power conversion assembly

51: incoming line terminal of power conversion assembly

52: wire outlet end of power conversion assembly

53: power conversion unit

6: network side reactor

63: first side of network side reactor

64: second side of network side reactor

65: third side of network side reactor

66: fourth side of grid-side reactor

67: fifth side of the grid-side reactor

68: sixth side of the network side reactor

61: wire inlet end of network side reactor

62: wire outlet end of network side reactor

7: network side switch

71: incoming line terminal of network side switch

72: wire outlet end of network side switch

73: first side of network side switch

74: second side of network side switch

75: third side of network side switch

76: fourth side of network side switch

77: fifth side of network side switch

78: sixth side of network side switch

81: first connecting part

82: second connecting part

83: third connecting part

84: the fourth connecting part

85: the fifth connecting part

86: the sixth connecting part

X: a first direction

Y: second direction

Z: third direction

Detailed Description

Some exemplary embodiments that embody features and advantages of the invention will be described in detail in the description that follows. As will be realized, the invention is capable of other and different modifications and its several details are capable of modifications in various obvious respects, all without departing from the invention, and the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, in which fig. 1 is a schematic structural diagram of a converter according to the present invention, fig. 2 is a schematic structural diagram of a converter shown in fig. 1 without showing a cabinet, fig. 3 is a schematic structural diagram of another view angle of the converter shown in fig. 1, fig. 4 is a schematic structural diagram of a converter shown in fig. 3 without showing a cabinet, and fig. 5 is a schematic structural diagram of a circuit of the converter shown in fig. 1. As shown in fig. 1, a converter 1 of the present invention can be, but is not limited to, applied in a wind power generator for converting input electric energy provided by an external power source (not shown) into output electric energy, and the converter 1 includes a cabinet 2, a machine side switch 3, a machine side reactor 4, a power conversion assembly 5, a grid side reactor 6 and a grid side switch 7. The cabinet 2 has an accommodating space 20, and in some embodiments, the accommodating space 20 may further include a first accommodating space 201 and a second accommodating space 202.

The machine side switch 3 is disposed in the first accommodating space 201, and is used for receiving input power when the machine side switch is turned on and stopping transmission of the input power when the machine side switch is turned off. The machine side reactor 4 is disposed in the second accommodating space 202 and is disposed adjacent to the machine side switch 3, the machine side reactor 4 has an incoming line end 41 and an outgoing line end 42, the incoming line end 41 of the machine side reactor 4 is disposed adjacent to the machine side switch 3, the incoming line end 41 of the machine side reactor 4 is electrically coupled to the machine side switch 3 via a connection portion (such as the first connection portion 81 in fig. 1), the machine side reactor 4 receives input electric energy transmitted from the machine side switch 3 via the incoming line end 41 and filters the input electric energy, and the machine side reactor 4 further outputs the filtered input electric energy via the outgoing line end 42. The power conversion assembly 5 is disposed in the second accommodating space 202 and disposed adjacent to the machine side reactor 4, the power conversion assembly 5 has an incoming line end 51 and an outgoing line end 52, the incoming line end 51 of the power conversion assembly 5 is disposed adjacent to and electrically coupled to the outgoing line end 42 of the machine side reactor 4, the power conversion assembly 5 receives the filtered input electric energy through the incoming line end 51 and converts the filtered input electric energy into electric energy, and the power conversion assembly 5 further outputs a transition electric energy through the outgoing line end 52, wherein the power conversion assembly 5 is farther away from the machine side switch 3 than the machine side reactor 4, in other words, a distance between the machine side switch 3 and the power conversion assembly 5 is greater than a distance between the machine side switch 3 and the machine side reactor 4, that is, the machine side reactor 4 is disposed between the machine side switch 3 and the power conversion assembly 5.

The grid-side reactor 6 is disposed in the second accommodating space 202 and disposed adjacent to the power conversion assembly 5, the grid-side reactor 6 has a line inlet end 61 and a line outlet end 62, the line inlet end 61 of the grid-side reactor 6 is disposed adjacent to the line outlet end 52 of the power conversion assembly 5 and electrically coupled to the line inlet end 61, the grid-side reactor 6 receives the transition electric energy through the line inlet end 61 and filters the transition electric energy output by the power conversion assembly 5, and the grid-side reactor 6 further outputs the filtered transition electric energy through the line outlet end 62. The grid-side switch 7 is disposed in the first accommodating space 201 and adjacent to the grid-side reactor 6, and is configured to convert the filtered transition electric energy into output electric energy, wherein the grid-side switch 7 is farther away from the power conversion module 5 than the grid-side reactor 6, in other words, a distance between the grid-side switch 7 and the power conversion module 5 is greater than a distance between the grid-side switch 7 and the grid-side reactor 6, that is, the grid-side reactor 6 is disposed between the grid-side switch 7 and the power conversion module 5.

As can be seen from the above, the line inlet terminal 41 of the machine side reactor 4 of the converter 1 of the present invention is disposed adjacent to and electrically coupled to the machine side switch 3, and the machine side reactor 4 of the converter 1 is adjacent to the machine side switch 3 compared to the power conversion component 5, so that the connection portion for connecting the machine side reactor 4 and the machine side switch 3 can be directly connected between the line inlet terminal 41 of the machine side reactor 4 and the machine side switch 3, and the converter 1 of the present invention can connect the line inlet terminal 41 of the machine side reactor 4 and the machine side switch 3 by using a short connection portion, thereby reducing the cost of the converter 1 of the present invention and the loss of the connection portion.

Please refer to fig. 6 in conjunction with fig. 1 to 5, wherein fig. 6 is a schematic perspective view of a cabinet of the converter shown in fig. 1. As shown in fig. 6, the cabinet 2 of the converter 1 includes a first side 21, a second side 22, a third side 23, a fourth side 24, a main line inlet 25, a main line outlet 26, a fifth side 27, a sixth side 28, and a frame 29, wherein the first side 21 and the second side 22 of the cabinet 2 are opposite to each other and extend along a plane formed by a first direction X and a third direction Z, the third side 23 and the fourth side 24 of the cabinet 2 are located between the first side 21 and the second side 22, and the third side 23 and the fourth side 24 of the cabinet 2 are opposite to each other and extend along a plane formed by a second direction Y and a third direction Z, wherein the second direction Y is perpendicular to the first direction X, and the third direction Z is perpendicular to the first direction X and the second direction Y. The main incoming line 25 is disposed on the first side 21 of the cabinet 2, the main incoming line 25 transmits the input power provided by the external power source to the converter 1, the main outgoing line 26 is disposed on the second side 22 of the cabinet 2, and the main outgoing line 26 is used for outputting the output power. The frame 29 is located between the first side 21 and the second side 22 of the cabinet 2, one end of the frame 29 is connected to the first side 21 of the cabinet 2, and the other end of the frame 29 is connected to the second side 22 of the cabinet 2.

Referring to fig. 1 to 5, in the present embodiment, the machine side switch 3 has an incoming terminal 31 and an outgoing terminal 32, the incoming terminal 31 of the machine side switch 3 is adjacent to the first side 21 of the cabinet 2, the incoming terminal 31 of the machine side switch 3 is electrically coupled to the main incoming terminal 25 of the cabinet 2, and the machine side switch 3 receives input power provided by an external power source through the incoming terminal 31. The outlet terminal 32 of the machine side switch 3 is disposed adjacent to and electrically coupled to the inlet terminal 41 of the machine side reactor 4, and the machine side switch 3 outputs the input electric energy to the machine side reactor 4 through the outlet terminal 31. In some embodiments, the incoming terminal 31 and the outgoing terminal 32 of the machine side switch 3 are located on two opposite sides of the machine side switch 3, but not limited thereto. In the embodiment, the grid-side switch 7 has an incoming terminal 71 and an outgoing terminal 72, the incoming terminal 71 of the grid-side switch 7 is disposed adjacent to and electrically coupled to the outgoing terminal 62 of the grid-side reactor 6, and the grid-side switch 7 receives the filtered transient power through the incoming terminal 71. The outlet 72 of the grid-side switch 7 is adjacent to the second side 22 of the cabinet 2, the outlet 72 of the grid-side switch 7 is electrically coupled to the main outlet 26 of the cabinet 2, and the grid-side switch 7 outputs the output power to the main outlet 26 of the cabinet 2 through the outlet 72. In some embodiments, the incoming terminal 71 and the outgoing terminal 72 of the grid-side switch 7 are located on the same side of the grid-side switch 7, but not limited thereto, and may also be located on two opposite sides or two adjacent sides of the grid-side switch 7, respectively.

The current transformer 1 further includes a first connection portion 81, a second connection portion 82, a third connection portion 83, and a fourth connection portion 84. The first connection portion 81 can be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, and the first connection portion 81 is electrically connected between the incoming line terminal 41 of the machine side reactor 4 and the outgoing line terminal 32 of the machine side switch 3 to transmit the input electric energy received by the machine side switch 3 to the machine side reactor 4. In this embodiment, the first connection portion 81 extends or bends and extends from the outlet end 32 of the machine side switch 3 toward the inlet end 41 of the machine side reactor 4, and the number of times of bending and extending of the first connection portion 81 may be greater than or equal to one time.

The second connection portion 82 may be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, and the second connection portion 82 is electrically connected between the outlet end 42 of the machine-side reactor 4 and the inlet end 51 of the power conversion assembly 5 to transmit the filtered input electric energy output by the machine-side reactor 4 to the power conversion assembly 5, where the second connection portion 82 extends from the outlet end 42 of the machine-side reactor 4 toward the inlet end 51 of the power conversion assembly 5, and the second connection portion 82 is disposed parallel or approximately parallel to the first direction X, for example, in some embodiments, an included angle between the second connection portion 82 and the first direction X may be between positive 20 degrees and negative 20 degrees. The third connecting portion 83 may be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, and the third connecting portion 83 is electrically connected between the wire outlet end 52 of the power conversion module 5 and the wire inlet end 61 of the grid-side reactor 6 to transmit the transient power output by the power conversion module 5 to the grid-side reactor 6, wherein the third connecting portion 83 extends from the wire outlet end 52 of the power conversion module 5 toward the wire inlet end 61 of the grid-side reactor 6, and the third connecting portion 83 is disposed parallel or approximately parallel to the first direction X, for example, in some embodiments, an included angle between the third connecting portion 83 and the first direction X may be positive 20 degrees to negative 20 degrees, so that it is known that the third connecting portion 83 is parallel to the second connecting portion 82.

In order to save the materials of the second connecting portion 82 and the third connecting portion 83 to the maximum extent and facilitate the fixing, wherein both the line inlet end 51 and the line outlet end 52 of the power conversion assembly 5 can be disposed parallel to the first direction X, that is, the connecting surface of the line inlet end 51 and the second connecting portion 82 is parallel to the first direction X, and the connecting surface of the line outlet end 52 and the third connecting portion 83 is parallel to the first direction X.

The fourth connection portion 84 may be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, and the fourth connection portion 84 is electrically connected between the line outlet 62 of the grid-side reactor 6 and the line inlet 71 of the grid-side switch 7 to transmit the filtered transient electric energy output by the grid-side reactor 6 to the grid-side switch 7. In this embodiment, the fourth connection portion 84 extends or bends and extends from the outlet end 62 of the grid-side reactor 6 toward the inlet end 71 of the grid-side switch 7, and the number of times of bending and extending the fourth connection portion 84 may be greater than or equal to one time.

In the present embodiment, the current transformer 1 further includes a fifth connecting portion 85 and a sixth connecting portion 86. The fifth connection portion 85 may be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, the fifth connection portion 85 is electrically connected between the main line inlet 25 of the cabinet 2 and the line inlet 31 of the machine side switch 3 to transmit the input power received by the main line inlet 25 of the cabinet 2 to the machine side switch 3, the fifth connection portion 85 extends or bends from the main line inlet 25 of the cabinet 2 toward the line inlet 31 of the machine side switch 3, and the number of bending times is greater than or equal to one, in a preferred embodiment, the fifth connection portion 85 is parallel to the second direction Y. The sixth connection portion 86 may be, but not limited to, a copper bar, an aluminum bar, or a copper-aluminum composite bar, and the sixth connection portion 86 is electrically connected between the wire outlet 72 of the grid-side switch 7 and the main wire outlet 26 of the cabinet 2 to transmit the output power output by the grid-side switch 7 to the main wire outlet 26 of the cabinet 2, and the sixth connection portion 86 extends or bends from the wire outlet 72 of the grid-side switch 7 toward the main wire outlet 26 of the cabinet 2, and the number of bending times is greater than or equal to one, in a preferred embodiment, the sixth connection portion 86 is parallel to the second direction Y.

Referring to fig. 7 in conjunction with fig. 1 to 5, fig. 7 is a schematic perspective view of a machine side reactor of the current transformer shown in fig. 1. As shown in fig. 7, the machine-side reactor 4 has a first side 43, a second side 44, a third side 45, a fourth side 46, a fifth side 47, and a sixth side 48. The first side 43 and the second side 44 of the machine side reactor 4 are disposed opposite to each other, the first side 43 of the machine side reactor 4 is adjacent to the grid side switch 7 and the machine side switch 3, and the second side 44 of the machine side reactor 4 is adjacent to the power conversion module 5. The third side 45 and the fourth side 46 of the machine side reactor 4 are arranged opposite to each other and between the first side 43 and the second side 44 of the machine side reactor 4, and the fourth side 46 of the machine side reactor 4 is adjacent to the grid side reactor 6. The fifth side 47 and the sixth side 48 of the machine side reactor 4 are arranged opposite to each other and between the first side 43 and the second side 44 of the machine side reactor 4 and between the third side 45 and the fourth side 46 of the machine side reactor 4. The inlet terminal 41 of the machine side reactor 4 is located at the fifth side 47 of the machine side reactor 4, and the inlet terminal 41 of the machine side reactor 4 is adjacent to a boundary line formed at the intersection of the fifth side 47 and the first side 43 of the machine side reactor 4. The outlet end 42 of the machine side reactor 4 is located on the sixth side 48 of the machine side reactor 4, and the outlet end 42 of the machine side reactor 4 is adjacent to a boundary line formed at the intersection of the sixth side 48 and the second side 44 of the machine side reactor 4. In other embodiments, the line inlet 41 of the machine side reactor 4 is located on the first side 43 of the machine side reactor 4 and adjacent to the border line formed by the junction of the fifth side 47 of the machine side reactor 4 and the first side 43, and the line outlet 42 of the machine side reactor 4 is located on the second side 44 of the machine side reactor 4 and adjacent to the border line formed by the junction of the sixth side 48 of the machine side reactor 4 and the second side 44.

Referring to fig. 8 in conjunction with fig. 1 to 5, fig. 8 is a schematic perspective view of a grid-side reactor of the current transformer shown in fig. 1. As shown in fig. 8, the grid-side reactor 6 has a first side 63, a second side 64, a third side 65, a fourth side 66, a fifth side 67 and a sixth side 68. The first side 63 and the second side 64 of the grid side reactor 6 are arranged opposite each other, the first side 63 of the grid side reactor 6 being adjacent to the grid side switch 7 and the second side 64 of the grid side reactor 6 being adjacent to the power conversion assembly 5. The third side 65 and the fourth side 66 of the grid-side reactor 6 are arranged opposite to each other and between the first side 63 and the second side 64 of the grid-side reactor 6, and the third side 65 of the grid-side reactor 6 is adjacent to the machine-side reactor 4. The fifth and sixth sides 67, 68 of the grid-side reactor 6 are arranged opposite each other and between the first and second sides 63, 64 of the grid-side reactor 6 and between the third and fourth sides 65, 66 of the grid-side reactor 6. The line inlet end 61 of the grid side reactor 6 is located at the sixth side 68 of the grid side reactor 6, and the line inlet end 61 of the grid side reactor 6 is adjacent to a line formed by the intersection of the sixth side 68 and the second side 64 of the grid side reactor 6. The outlet end 62 of the grid-side reactor 6 is located on the fifth side 67 of the grid-side reactor 6, and the outlet end 62 of the grid-side reactor 6 is adjacent to a boundary formed by the intersection of the fifth side 67 and the first side 63 of the grid-side reactor 6. In other embodiments, the line inlet end 61 of the grid-side reactor 6 is located at the second side 64 of the grid-side reactor 6, and is adjacent to a boundary line formed by the intersection of the sixth side 68 and the second side 64 of the grid-side reactor 6. The outlet end 62 of the network-side reactor 6 is located at the first side 63 of the network-side reactor 6 and is adjacent to a borderline formed by the intersection of the fifth side 67 of the network-side reactor 6 and the first side 63.

Referring to fig. 9 in conjunction with fig. 1 to 5, fig. 9 is a schematic perspective view of a grid-side switch of the converter shown in fig. 1. As shown in fig. 9, the grid-side switch 7 has a first side 73, a second side 74, a third side 75, a fourth side 76, a fifth side 77, and a sixth side 78. The first side 73 and the second side 74 of the grid-side switch 7 are arranged opposite to each other, the first side 73 of the grid-side switch 7 is adjacent to the third side 23 of the cabinet 2, and the second side 74 of the grid-side switch 7 is adjacent to the machine-side reactor 4 and the grid-side reactor 7. The third side 75 and the fourth side 76 of the grid-side switch 7 are disposed opposite to each other and located between the first side 73 and the second side 74 of the grid-side switch 7, and the fourth side 76 of the grid-side switch 7 is adjacent to the second side 22 of the cabinet 2. The fifth side 77 and the sixth side 78 of the grid-side switch 7 are disposed opposite to each other, between the first side 73 and the second side 74 of the grid-side switch 7, and between the third side 75 and the fourth side 76 of the grid-side switch 7. The incoming line end 71 and the outgoing line end 72 of the grid-side switch 7 are both located on the fifth side 77 of the grid-side switch 7, wherein the incoming line end 71 of the grid-side switch 7 extends outward from the fifth side 77 of the grid-side switch 7, and the extending direction of the side surface with the largest surface area of the incoming line end 71 of the grid-side switch 7 is perpendicular to the extending direction of the side surface with the largest surface area of the outgoing line end 72 of the grid-side switch 7.

Referring to fig. 1 to 4 again, the power conversion assembly 5 of the converter 1 further includes a plurality of power conversion units 53, at least one power conversion unit 53 of the plurality of power conversion units 53 is electrically coupled to the wire outlet 42 of the machine-side reactor 4, and the other at least one power conversion unit 53 of the plurality of power conversion units 53 is electrically coupled to the wire inlet 61 of the grid-side reactor 6, wherein each power conversion unit 53 is a rectangular body, and two side surfaces of each power conversion unit 53 facing the third side 23 and the fourth side 24 of the cabinet 2 are two side surfaces with the smallest surface area of the power conversion unit 53.

In summary, the present invention provides a converter, wherein the line inlet end of the machine side reactor of the converter is disposed adjacent to and electrically coupled to the machine side switch, and the machine side reactor of the converter is adjacent to the machine side switch compared to the power conversion assembly, so that the connection portion for connecting the machine side reactor and the machine side switch can be shortened to the greatest extent; similarly, the wire outlet end of the grid-side reactor of the converter is arranged adjacent to and electrically coupled with the grid-side switch, and the grid-side reactor of the converter is adjacent to the grid-side switch compared with the power conversion assembly, so that the connecting part for connecting the grid-side reactor and the grid-side switch can be shortened to the greatest extent; in addition, the positions of the wire outlet end and the wire inlet end of the machine side reactor and the network side reactor are reasonably set, and the spatial layout between the power conversion components and the wire inlet end and the wire outlet end of the reactor is adjusted, so that the directions of the wire inlet end and the wire outlet end of the reactor are consistent with the electric energy flow direction of the converter, namely the reactor serves as a part of a copper bar, and therefore the length of the connecting part between the machine side reactor and the network side reactor and the power conversion components is shortened to the greatest extent, the converter can be connected with each power component (comprising the machine side switch, the machine side reactor, the power conversion components, the network side reactor and the network side switch) by using the shorter connecting part, the total material of the connecting part is saved, and the cost of the converter and the loss of the connecting part.