An arc-pulling sensor and inverter

Abstract

The application discloses a draw arc sensor and an inverter, and belongs to the technical field of electronic power. The draw arc sensor comprises a first shell, at least two containing cavities, each containing cavity is in the shape of a ring body, each containing cavity is provided with a first containing cavity, and the first containing cavities in adjacent containing cavities are communicated; and at least two magnetic rings, each magnetic ring is located in a first containing cavity. Through the technical scheme, the draw arc sensor comprises multiple magnetic rings, each magnetic ring can detect an arc of a branch, so that multiple branches can be detected at the same time, and the detection efficiency is improved. Moreover, the multiple magnetic rings share one first shell, and the space utilization is improved.

Description

Technical Field

[0001] This application relates to the field of electronic power technology, and in particular to an arcing sensor and inverter. Background Technology

[0002] In electrical systems, electric arc faults are a common and dangerous condition. An arc sensor is a sensor used to detect arc faults, capable of quickly detecting arcing phenomena in electrical systems. An electric arc is a high-energy discharge phenomenon, typically accompanied by high temperature, intense light, and high current. Arc sensors identify the presence of an electric arc by detecting signals such as light, heat, and current changes generated by the arc.

[0003] In related technologies, arc sensors are single-unit structures, and each arc sensor can only detect arc faults on one branch at a time, resulting in low detection efficiency. Utility Model Content

[0004] This application provides an arc fault sensor and inverter, which improves the efficiency of arc fault detection and at least partially solves the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an arc-drawing sensor is provided, comprising:

[0006] The first outer shell includes at least two receiving cavities, each of which is annular and has a first receiving cavity, and the first receiving cavities in adjacent receiving cavities are connected to each other.

[0007] At least two magnetic rings, each of which is located within one of the first receiving cavities.

[0008] In some embodiments, the receiving cavity includes a top cover, a bottom plate, an inner side plate, and an outer side plate; the top cover, the bottom plate, the inner side plate, and the outer side plate enclose the first receiving cavity;

[0009] The top cover is parallel to the bottom plate; the inner side plate is perpendicular to the bottom plate; the outer side plate is perpendicular to the bottom plate.

[0010] In some embodiments, the at least two magnetic rings are arranged in a direction parallel to the surface of the base plate.

[0011] In some embodiments, the projection of the inner side plate onto the surface of the base plate is annular.

[0012] In some embodiments, the magnetic ring is sleeved between the inner side plate and the outer side plate.

[0013] In some embodiments, each of the magnetic rings includes a magnetic mechanism and a coil surrounding the magnetic mechanism;

[0014] Each of the coils includes a first output terminal for connection to an inverter.

[0015] In some embodiments, the outer side plate has an interface portion including a plurality of channels connecting the first receiving cavity to the outside, and the first output terminal of the coil is led out to the outside of the first receiving cavity through the channels.

[0016] In some embodiments, the arc sensor further includes a second output terminal located outside the first housing;

[0017] Each of the first output terminals is connected to the second output terminal, and the second output terminal is used to connect to the inverter.

[0018] In some embodiments, the first housing includes a plurality of limiting portions;

[0019] The limiting part is connected to the bottom plate and the outer side plate; the limiting part is located between two adjacent first receiving cavities, and / or the limiting part is located between the magnetic ring and the outer side plate.

[0020] According to a second aspect of this application, an inverter is provided, comprising:

[0021] The second housing has a second receiving cavity; the second housing includes a target panel, the target panel including a plurality of photovoltaic terminals;

[0022] As described in any of the above embodiments, the arcing sensor is located outside the second housing, and the plurality of photovoltaic terminals pass through the magnetic ring;

[0023] A filter plate is located in the second receiving cavity, and the target panel is located between the filter plate and the arc sensor;

[0024] A circuit module is located in the second receiving cavity, and the circuit module is connected to the photovoltaic terminal.

[0025] In some embodiments, the circuit module includes an inverter bridge circuit; the inverter bridge circuit is connected to the photovoltaic terminal and the photovoltaic string.

[0026] In some embodiments, the circuit module includes a control unit; each magnetic ring includes a magnetic mechanism and a coil surrounding the magnetic mechanism; each coil includes a first output terminal connected to the control unit.

[0027] In some embodiments, the arc sensor further includes a second output terminal located outside the first housing;

[0028] Each of the first output terminals is connected to the second output terminal, and the second output terminal is connected to the control unit.

[0029] In some embodiments, the inverter further includes fasteners; the arcing sensor is fixedly connected to the target panel via the fasteners, and the filter board is fixedly connected to the target panel via the fasteners.

[0030] In some embodiments, the receiving cavity of the arc sensor includes a top cover, a bottom plate, an inner side plate, and an outer side plate; the top cover, the bottom plate, the inner side plate, and the outer side plate surround to form the first receiving cavity; the photovoltaic terminal and the inner side plate are engaged and snapped together.

[0031] The technical solution of this application can achieve the following technical effects:

[0032] Based on the arc sensor provided in this application embodiment, since the arc sensor includes multiple magnetic rings, each of which can detect arcs in one branch, multiple branches can be detected simultaneously, improving detection efficiency. Furthermore, the multiple magnetic rings share a single first housing, improving space utilization.

[0033] Based on the inverter provided in this application embodiment, the arcing sensor is placed in front of the filter board. The current provided by the photovoltaic string first passes through the arcing sensor and then through the filter board. Before arcing detection, the filter board can avoid eliminating abnormal fluctuations in the arc signal and can avoid attenuating high-frequency harmonics in the current. The detection sensitivity is significantly improved, enabling the arcing sensor to accurately identify the arc signal through high-frequency waves and thus identify arc faults, thereby improving the accuracy and sensitivity of arc fault detection.

[0034] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0037] Figure 1 This is a schematic diagram of an arc sensor.

[0038] Figure 2This is a top view of the arcing sensor with the top cover removed, provided in an exemplary embodiment of this disclosure;

[0039] Figure 3 This is a top view of the arc sensor provided in an exemplary embodiment of this disclosure;

[0040] Figure 4 This is a front view of the arcing sensor provided in an exemplary embodiment of this disclosure;

[0041] Figure 5 This is a side view of the arcing sensor provided in an exemplary embodiment of this disclosure;

[0042] Figure 6 This is an exploded view of the inverter provided in an exemplary embodiment of this disclosure;

[0043] Figure 7 This is a schematic diagram of the inverter provided in an exemplary embodiment of this disclosure;

[0044] Figure 8 This is a schematic diagram of the inverter provided in an exemplary embodiment of this disclosure;

[0045] Figure 9 This is a partial exploded view of an inverter provided in an exemplary embodiment of this disclosure.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1-Arc sensor; 11-First housing; 111-Receiving cavity; 112-First receiving cavity; 113-Top cover; 114-Base plate; 115-Inner side plate; 116-Outer side plate; 117-Interface part; 118-Limiting part; 12-Magnetic ring; 121-Magnetic mechanism; 122-Coil; 123-First output terminal; 13-Second output terminal;

[0048] 100 - Inverter; 2 - Second housing; 21 - Second receiving cavity; 22 - Target panel; 23 - Photovoltaic terminal; 231 - First terminal; 232 - Second terminal; 233 - Third terminal; 3 - Filter board; 4 - Circuit module; 41 - Inverter bridge circuit; 42 - Control unit; 43 - MPPT controller; 5 - Fastener; 61 - First photovoltaic string; 62 - Second photovoltaic string; 63 - Third photovoltaic string;

[0049] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0051] See related technologies. Figure 1 As shown, the arc sensor in the related technology is a single circular ring structure. The branch to be detected passes through the center of the arc sensor's ring. Each arc sensor can only detect arc faults on one branch at a time, resulting in low detection efficiency.

[0052] Furthermore, in related technologies, the arcing sensor is installed after the inverter's filter board, and the current passes through the filter board first and then through the arcing sensor. The main function of the filter board is to suppress electromagnetic interference, but it also filters the arc signal (especially high-frequency harmonics). This causes the arc signal to be weakened before reaching the arcing sensor, thereby reducing the sensitivity and accuracy of arc detection, making it impossible for the arcing sensor to accurately identify the arc signal and arc fault.

[0053] In view of the technical problems of low detection efficiency and low accuracy of arc-extension sensors in related technologies, this application proposes an arc-extension sensor and inverter to overcome the above problems.

[0054] The following description, in conjunction with the accompanying drawings, introduces an arc-generating sensor and inverter provided in this application.

[0055] See Figure 2 As shown in the figure, this application provides an arcing sensor 1, comprising:

[0056] The first outer shell 11 includes at least two receiving cavities 111, each receiving cavity 111 is annular, each receiving cavity 111 has a first receiving cavity 112, and the first receiving cavities 112 in adjacent receiving cavities 111 are connected to each other.

[0057] At least two magnetic rings 12, each magnetic ring 12 being located within a first receiving cavity 112.

[0058] This application uses an arc sensor 1 comprising three magnetic rings 12 as an example for illustration. Each magnetic ring 12 corresponds one-to-one with a first receiving cavity 112, and each magnetic ring 12 corresponds one-to-one with a branch to be detected. Of course, it should be noted that the number of magnetic rings 12 can be set according to the number of branches to be detected, and this application does not limit the number of magnetic rings 12.

[0059] In some embodiments, the arc sensor 1 has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other.

[0060] During arc detection, multiple branches to be tested pass through different magnetic rings 12.

[0061] Based on the above embodiments, the arc sensor 1 includes multiple magnetic rings 12, each of which can detect arcs in one branch, thus enabling simultaneous detection of multiple branches and improving detection efficiency. Furthermore, the multiple magnetic rings 12 share a single first housing 11, improving space utilization.

[0062] In some embodiments, see Figure 2 and Figure 3 As shown, the receiving cavity 111 includes a top cover 113, a bottom plate 114, an inner side plate 115, and an outer side plate 116; the top cover 113, the bottom plate 114, the inner side plate 115, and the outer side plate 116 enclose a first receiving cavity 112; the top cover 113 and the bottom plate 114 are parallel; the inner side plate 115 and the bottom plate 114 are perpendicular; the outer side plate 116 and the bottom plate 114 are perpendicular.

[0063] In some embodiments, at least two magnetic rings 12 are arranged in a direction parallel to the surface of the base plate 114. Specifically, at least two magnetic rings 12 are arranged along a first direction X, which is parallel to the direction of the surface of the base plate 114.

[0064] In some embodiments, the projection of the inner side plate 115 onto the surface of the base plate 114 is annular.

[0065] In some embodiments, the magnetic ring 12 is sleeved between the inner side plate 115 and the outer side plate 116. The magnetic ring 12 is parallel to the surface of the base plate 114.

[0066] In some embodiments, see Figure 2 As shown, each magnetic ring 12 includes a magnetic mechanism 121 and a coil 122 surrounding the magnetic mechanism 121; each coil 122 includes a first output terminal 123 for connection to an inverter 100 (not shown). The magnetic mechanism 121 is ring-shaped. The coil 122 includes a wire and an insulating coating surrounding the wire, and the first output terminal 123 is the end of the coil 122. Different coils 122 are insulated from each other.

[0067] In some embodiments, see Figure 2 As shown, the outer side plate 116 has an interface portion 117, which includes several channels connecting the first receiving cavity 112 to the outside. The first output terminal 123 of the coil 122 is led out to the outside of the first receiving cavity 112 through the channels. Outside the first receiving cavity 112, multiple first output terminals 123 are integrated into a wire harness.

[0068] In some embodiments, see Figure 2 and Figure 5As shown, the arc sensor 1 also includes a second output terminal 13, which is located outside the first housing 11; each first output terminal 123 is connected to the second output terminal 13, and the second output terminal 13 is used to connect to the inverter 100 (not shown). Specifically, outside the first receiving cavity 112, multiple first output terminals 123 are integrated into a wire harness, the end of which is connected to the second output terminal 13.

[0069] Based on the above embodiments, multiple first output terminals 123 are integrated into a single wire harness and then connected to the second output terminal 13, which reduces wiring complexity and allows the arc sensor 1 to be quickly electrically connected to the inverter 100 via the second output terminal 13.

[0070] In some embodiments, the magnetic mechanism 121 comprises a magnetic material with high permeability, such as a silicon steel ring, a ferrite ring, or a nanocrystalline ring. When an electric current passes through the magnetic mechanism 121, a magnetic field is generated within it. By winding a coil 122 around the magnetic mechanism 121, the magnetic field can be converted into a current signal or a voltage signal, thereby enabling arc detection by analyzing changes in the current or voltage signal.

[0071] In some embodiments, see Figure 2 As shown, the first outer casing 11 includes a plurality of limiting portions 118; the limiting portions 118 are connected to the bottom plate 114 and the outer side plate 116; the limiting portions 118 are located between two adjacent first receiving cavities 112, and / or, the limiting portions 118 are located between the magnetic ring 12 and the outer side plate 116. The limiting portions 118 are used to limit the magnetic ring 12, prevent adjacent magnetic rings 12 from colliding, and prevent the magnetic ring 12 from colliding with the outer side plate 116.

[0072] In some embodiments, see Figure 3 As shown, the inner side plate 115 corresponding to the same receiving cavity 111 has a first dimension L1 along the first direction X, L1 = 55 mm. The inner side plate 115 has a second dimension L2 along the second direction Y, L2 = 60 mm. The first outer shell 11 has a third dimension L3 along the second direction Y, L3 = 76 mm. The first outer shell 11 has a fourth dimension L4 along the first direction X, L4 = 205 mm. The arc sensor 1 has a fifth dimension L5 along the first direction X, L5 = 360 mm. (See reference...) Figure 4 As shown, the first housing 11 has a sixth dimension L6 along the third direction Z, where L6 = 12 mm.

[0073] Accordingly, this application also provides an inverter 100, which includes a photovoltaic inverter, specifically including any one of a single-phase inverter, a three-phase inverter, a string inverter, and a centralized inverter. See also... Figure 6 As shown, the inverter 100 includes:

[0074] The second housing 2 has a second receiving cavity 21; the second housing 2 includes a target panel 22, and the target panel 22 includes a plurality of photovoltaic terminals 23;

[0075] As in any of the above embodiments, the arc sensor 1 is located outside the second housing 2, and a plurality of photovoltaic terminals 23 pass through the magnetic ring 12 (not shown);

[0076] The filter plate 3 is located in the second receiving cavity 21, and the target panel 22 is located between the filter plate 3 and the arc sensor 1.

[0077] Circuit module 4 is located in the second receiving cavity 21 and is connected to photovoltaic terminal 23.

[0078] In some embodiments, the target panel 22 is also referred to as the front panel. The target panel 22 is located in the front part of the second housing 2 and is typically used to install various interfaces, indicator lights, displays, etc. The target panel 22 is the main interface for users to interact with the inverter 100 and is also the interface area for connecting external devices (such as photovoltaic strings, power grid, etc.).

[0079] In some embodiments, the filter board 3 includes a photovoltaic electromagnetic interference (EMI) filter board, which is used to filter the current (DC) provided by the photovoltaic string and reduce electromagnetic interference.

[0080] Based on the above embodiments, the arc sensor 1 is placed in front of the filter plate 3. The current provided by the photovoltaic string first passes through the arc sensor 1 and then through the filter plate 3. Before arc detection, the filter plate 3 is used to prevent abnormal fluctuations in the arc signal and to prevent the filter plate 3 from attenuating the high-frequency harmonics in the current. The detection sensitivity is significantly improved, enabling the arc sensor 1 to accurately identify the arc signal through high-frequency waves and thus identify the arc fault, thereby improving the accuracy and sensitivity of arc fault detection.

[0081] In some embodiments, see Figure 7As shown, circuit module 4 includes an inverter bridge circuit 41; the inverter bridge circuit 41 is connected to the photovoltaic strings via photovoltaic terminals 23. The photovoltaic terminals 23 specifically include: a first terminal 231, a second terminal 232, and a third terminal 233. The photovoltaic strings specifically include: a first photovoltaic string 61, a second photovoltaic string 62, and a third photovoltaic string 63. Each photovoltaic string includes multiple electrically connected photovoltaic modules. A photovoltaic module is the basic unit for converting solar energy into electrical energy; it consists of multiple photovoltaic cells electrically connected and encapsulated, capable of converting photon energy from sunlight into direct current (DC). The inverter bridge circuit 41 is one of the most important circuits in the inverter 100; it is used to convert direct current (DC) into alternating current (AC), which can be used by the power grid or load.

[0082] In some embodiments, see Figure 2 and Figure 8 As shown, the circuit module 4 includes a control unit 42; each magnetic ring 12 includes a magnetic mechanism 121 and a coil 122 surrounding the magnetic mechanism 121; each coil 122 includes a first output terminal 123, which is connected to the control unit 42.

[0083] In some embodiments, see Figure 2 and Figure 8 As shown, the arc sensor 1 also includes a second output terminal 13, which is located outside the first housing 11. Each first output terminal 123 is connected to the second output terminal 13, and the second output terminal 13 is connected to the control unit 42. The control unit 42 is used to analyze the current signal corresponding to the current passing through the arc sensor 1. Under normal circumstances, the waveform of the current signal should be a smooth sine wave or a waveform close to a sine wave. An arc fault will generate an arc signal, which will cause the current signal to change as follows: 1. It will cause the waveform to have spikes, glitches, or irregular fluctuations; 2. It will cause the current amplitude of the current signal to increase sharply; 3. High-frequency noise will appear in the current signal. The control unit 42 is used to analyze the current signal passing through the magnetic ring 12, detect whether there are the above changes in the current signal (whether there are spikes, glitches, or irregular fluctuations, whether there is a sharp increase in current amplitude, whether there is high-frequency noise), and thus determine whether there is an arc fault. If the current signal has the above changes, it indicates that an arc fault has occurred, and arc detection is achieved.

[0084] In some embodiments, see Figure 9 As shown, the inverter 100 also includes fasteners 5; the arcing sensor 1 is fixedly connected to the target panel 22 via fasteners 5, and the filter plate 3 is fixedly connected to the target panel 22 via fasteners 5. Fasteners 5 include mating screws and nuts.

[0085] In some embodiments, seeFigure 2 and Figure 6 As shown, the receiving cavity 111 of the arc sensor 1 includes a top cover 113, a bottom plate 114, an inner side plate 115, and an outer side plate 116; the top cover 113, bottom plate 114, inner side plate 115, and outer side plate 116 enclose a first receiving cavity 112; the photovoltaic terminal 23 and the inner side plate 115 are engaged and snapped together. Specifically, the photovoltaic terminal 23 is located at the corner of the inner side plate 115, and the arc sensor 1 and the target panel 22 are arranged parallel to each other through the photovoltaic terminal 23. The photovoltaic terminal 23 passes through both the inner side plate 115 and the magnetic ring 12. Based on this embodiment, the fastener 5 can be omitted, and the arc sensor 1 can be fixed to the target panel 22 by the engagement of the photovoltaic terminal 23 and the inner side plate 115; and, since the fastener 5 is omitted, an assembly step can be reduced.

[0086] Based on the above embodiments, the arcing sensor 1 is installed by making full use of the gap between the photovoltaic terminals 23, avoiding the arcing sensor 1 from occupying the space of the second receiving cavity 21, without increasing the volume of the inverter 100, thus improving the space utilization rate.

[0087] In some embodiments, see Figure 6 and Figure 7As shown, circuit module 4 also includes an MPPT (Maximum PowerPoint Tracking) controller 43. Photovoltaic terminals 23 include a first terminal 231, a second terminal 232, and a third terminal 233. A first photovoltaic string 61 is connected to the first terminal 231, a second photovoltaic string 62 is connected to the second terminal 232, and a third photovoltaic string 63 is connected to the third terminal 233. The first terminal 231, the second terminal 232, and the third terminal 233 pass through different magnetic rings 12. The first terminal 231, the second terminal 232, and the third terminal 233 are connected to the MPPT controller 43. The MPPT controller 43 is connected to the inverter bridge circuit 41. The MPPT controller 43 is used to independently track and manage the maximum power point of the photovoltaic strings. It ensures that the photovoltaic strings always operate at their maximum power point under different light and temperature conditions, thereby guaranteeing energy output efficiency and maximizing energy output. In this embodiment, the first terminal 231 specifically includes four terminals, and the first photovoltaic string 61 specifically includes four photovoltaic strings. Each terminal in the first terminal 231 is connected to one photovoltaic string in the first photovoltaic string 61. The second terminal 232 specifically includes four terminals, and the second photovoltaic string 62 specifically includes four photovoltaic strings. Each terminal in the second terminal 232 is connected to one photovoltaic string in the second photovoltaic string 62. The third terminal 233 specifically includes four terminals, and the third photovoltaic string 63 specifically includes four photovoltaic strings. Each terminal in the third terminal 233 is connected to one photovoltaic string in the third photovoltaic string 63. It should be noted that the first terminal 231 may also include other numbers of terminals, such as 1, 2, or 3, and correspondingly, the first photovoltaic string 61 specifically includes 1, 2, or 3 photovoltaic strings; the second terminal 232 may also include other numbers of terminals, such as 1, 2, or 3, and correspondingly, the second photovoltaic string 62 specifically includes 1, 2, or 3 photovoltaic strings; the third terminal 233 may also include other numbers of terminals, such as 1, 2, or 3, and correspondingly, the third photovoltaic string 63 specifically includes 1, 2, or 3 photovoltaic strings. The specific number of photovoltaic strings can be determined according to the output power requirements, and each photovoltaic string corresponds to one terminal. This application does not limit the specific number of photovoltaic terminals 23 passing through the magnetic ring 12.

[0088] In some embodiments, the first terminal 231, the second terminal 232, and the third terminal 233 may also include an idle terminal, which is not connected to the photovoltaic string.

[0089] Based on the above embodiments, by using the first terminal 231, the second terminal 232, and the third terminal 233 as branches to be detected, an arc sensor 1 can be used to detect arc faults on multiple branches simultaneously, thereby improving detection efficiency.

[0090] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0092] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0093] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An arc-extension sensor, characterized in that, include: The first outer shell (11) includes at least two receiving cavities (111), each of the receiving cavities (111) is annular, each of the receiving cavities (111) has a first receiving cavity (112), and the first receiving cavities (112) in adjacent receiving cavities (111) are connected to each other; At least two magnetic rings (12), each of which is located within one of the first receiving cavities (112).

2. The arc sensor according to claim 1, characterized in that, The receiving cavity (111) includes a top cover (113), a bottom plate (114), an inner side plate (115), and an outer side plate (116); the top cover (113), the bottom plate (114), the inner side plate (115), and the outer side plate (116) enclose to form the first receiving cavity (112); The top cover (113) and the bottom plate (114) are parallel; the inner side plate (115) and the bottom plate (114) are perpendicular; the outer side plate (116) and the bottom plate (114) are perpendicular.

3. The arc sensor according to claim 2, characterized in that, The at least two magnetic rings (12) are arranged in a direction parallel to the surface of the base plate (114).

4. The arc sensor according to claim 2, characterized in that, The projection of the inner side plate (115) onto the surface of the base plate (114) is annular.

5. The arc sensor according to claim 2, characterized in that, The magnetic ring (12) is sleeved between the inner side plate (115) and the outer side plate (116).

6. The arc sensor according to claim 2, characterized in that, Each of the magnetic rings (12) includes a magnetic mechanism (121) and a coil (122) surrounding the magnetic mechanism (121); Each of the coils (122) includes a first output terminal (123) for connection to an inverter (100).

7. The arc sensor according to claim 6, characterized in that, The outer side plate (116) has an interface portion (117), which includes a plurality of channels connecting the first receiving cavity (112) to the outside. The first output end (123) of the coil (122) is led out to the outside of the first receiving cavity (112) through the channels.

8. The arc sensor according to claim 7, characterized in that, The arc sensor (1) also includes a second output terminal (13), which is located outside the first housing (11); Each of the first output terminal (123) and the second output terminal (13) is connected, and the second output terminal (13) is used to connect to the inverter (100).

9. The arc sensor according to claim 2, characterized in that, The first outer shell (11) includes a plurality of limiting parts (118); The limiting part (118) is connected to the bottom plate (114) and the outer side plate (116); the limiting part (118) is located between two adjacent first receiving cavities (112), and / or, the limiting part (118) is located between the magnetic ring (12) and the outer side plate (116).

10. An inverter, characterized in that, include: The second housing (2) has a second receiving cavity (21); the second housing (2) includes a target panel (22) which includes a plurality of photovoltaic terminals (23); The arc sensor (1) as described in any one of claims 1 to 9, wherein the arc sensor (1) is located outside the second housing (2), and the plurality of photovoltaic terminals (23) pass through the magnetic ring (12); A filter plate (3) is located in the second receiving cavity (21), and the target panel (22) is located between the filter plate (3) and the arc sensor (1); The circuit module (4) is located in the second receiving cavity (21), and the circuit module (4) is connected to the photovoltaic terminal (23).

11. The inverter according to claim 10, characterized in that, The circuit module (4) includes an inverter bridge circuit (41); the inverter bridge circuit (41) is connected to the photovoltaic string through the photovoltaic terminal (23).

12. The inverter according to claim 10, characterized in that, The circuit module (4) includes a control unit (42); Each of the magnetic rings (12) includes a magnetic mechanism (121) and a coil (122) surrounding the magnetic mechanism (121); Each of the coils (122) includes a first output terminal (123) connected to the control unit (42).

13. The inverter according to claim 12, characterized in that... The arc sensor (1) further includes a second output terminal (13), which is located outside the first housing (11); Each of the first output terminal (123) and the second output terminal (13) is connected, and the second output terminal (13) is connected to the control unit (42).

14. The inverter according to claim 10, characterized in that, The inverter (100) also includes fasteners (5); The arc sensor (1) is fixedly connected to the target panel (22) via the fastener (5), and the filter plate (3) is fixedly connected to the target panel (22) via the fastener (5).

15. The inverter according to claim 10, characterized in that, The receiving cavity (111) of the arc sensor (1) includes a top cover (113), a bottom plate (114), an inner side plate (115), and an outer side plate (116); the top cover (113), the bottom plate (114), the inner side plate (115), and the outer side plate (116) enclose to form the first receiving cavity (112); The photovoltaic terminal (23) and the inner side plate (115) are engaged and snapped together.

Images