Photovoltaic inverter

Abstract

The utility model relates to the technical field of inverters, and discloses a photovoltaic inverter, which comprises an inversion mechanism, the inversion mechanism comprises an inverter main body, the inverter main body is a photovoltaic assembly, the front end of the inverter main body is fixedly provided with a protective steel shell through screws, two sides of the bottom end of the inverter main body are respectively provided with a through groove, and the through grooves are communicated with the through grooves. A diversion fan is fixedly installed in the through groove, and a plurality of heat dissipation holes are horizontally formed in the top end of the inverter body at equal intervals. According to the utility model, an advanced harmonic suppression technology is adopted, i.e., a high-performance filter is added, the high-performance filter is configured with two filter capacitors to filter the current output by the inverter and reduce the harmonic content, the circuit monitor is arranged, and the harmonic component is reduced through a built-in pulse width modulation (PWM) algorithm; and the quality of the electric energy output by the inverter is monitored and managed to ensure that the electric energy meets relevant standards and requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to inverter technical field, concretely is a photovoltaic inverter. BACKGROUND

[0002] The inverter is a power electronic device that converts DC (Direct Current) to AC (Alternating Current), and converts DC to AC through the switching action of power semiconductor devices (such as IGBT, MOSFET, etc.). First, the DC passes through a switching circuit composed of one or more power semiconductor devices, and these devices are switched according to a certain frequency and duty cycle to chop the DC into a series of pulse signals. Currently, there are many types of inverters, including photovoltaic inverters.

[0003] The existing photovoltaic inverter has the following problems when in use: there may be harmonic components in the AC output by the photovoltaic inverter, which can interfere with the power grid and other electrical equipment, affecting power quality, and long-term operation may cause the power grid equipment to overheat, increase in loss, or even cause power system failure. In addition, photovoltaic inverters usually need to be operated in harsh outdoor conditions for a long time, such as high temperature, which may cause electronic components to age, poor heat dissipation, circuit failure, etc., resulting in system downtime or performance degradation. SUMMARY

[0004] (I) Technical problems solved.

[0005] In view of the deficiencies of the prior art, the utility model provides a photovoltaic inverter, which solves the problems raised in the background art.

[0006] (II) Technical solutions.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a photovoltaic inverter, comprising an inverter mechanism, the inverter mechanism comprising an inverter main body, the inverter main body being a photovoltaic module, the inverter main body front end fixedly installs the protective steel shell through the screw, the inverter main body bottom end both sides each open one through slot, and the through slot is fixedly installed by the flow guide fan, the inverter main body top end is horizontally equidistantly open a plurality of heat dissipation holes, the inverter main body both ends each fixedly connected with a group of heat dissipation fins, a group of heat dissipation fins is a plurality and is equidistantly arranged from top to bottom, three flow guide holes are equidistantly arranged from front to back between the upper and lower sidewalls of the heat dissipation fins.

[0008] As a further scheme of the utility model: the inverter main body is provided with a harmonic suppression mechanism, the harmonic suppression mechanism includes a high-performance filter fixedly installed on one side of the rear end of the inverter main body, the harmonic suppression mechanism further includes a circuit monitor fixedly installed on the other side of the rear end of the inverter main body, the high-performance filter is provided with two filter capacitors, the high-performance filter is electrically connected with the inverter main body via a connecting flat cable at the bottom end, and the circuit monitor is electrically connected with the inverter main body via a connecting line at the bottom end.

[0009] As a further scheme of the utility model: the inverter main body is provided with a harmonic suppression mechanism, the harmonic suppression mechanism includes a high-performance filter fixedly installed on one side of the rear end of the inverter main body, the harmonic suppression mechanism further includes a circuit monitor fixedly installed on the other side of the rear end of the inverter main body, the high-performance filter is provided with two filter capacitors, the high-performance filter is electrically connected with the inverter main body via a connecting flat cable at the bottom end, and the circuit monitor is electrically connected with the inverter main body via a connecting line at the bottom end.

[0010] As a further scheme of the utility model: the inverter main body is provided with a harmonic suppression mechanism, the harmonic suppression mechanism includes a high-performance filter fixedly installed on one side of the rear end of the inverter main body, the harmonic suppression mechanism further includes a circuit monitor fixedly installed on the other side of the rear end of the inverter main body, the high-performance filter is provided with two filter capacitors, the high-performance filter is electrically connected with the inverter main body via a connecting flat cable at the bottom end, and the circuit monitor is electrically connected with the inverter main body via a connecting line at the bottom end.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1、 the utility model discloses, through adopting advanced harmonic suppression technology, namely increasing high-performance filter, its configuration has two filter capacitors, carries out filter processing to the current of inverter output, reduces harmonic content, and is provided with circuit monitor, through built-in pulse width modulation (PWM) algorithm, reduces harmonic component, and the monitoring and management of inverter output electric energy quality, ensure that it meets relevant standards and requirements.

[0013] 2、 the utility model discloses, through the screw fixed mounting of protection steel shell at inverter main body front end, strengthen the reliability of product, simultaneously, adopt better three-dimensional heat dissipation structure and cooling technology, its inverter main body bottom end symmetry fixed mounting has two flow guide fans, it can import airflow to inverter main body inside via bottom, and the airflow carries out inverter main body internal heat and discharges from the upper heat dissipation hole, ensure that inverter inside can high -efficient heat dissipation, in addition, its inverter both ends are each fixedly connected with multiple heat dissipation fins, further assist inverter main body heat dissipation, avoid the possible problems such as electronic component aging, poor heat dissipation, circuit failure of high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 For the whole three-dimensional of the utility model Figure 1 ;

[0015] Figure 2The utility model discloses a whole three-dimensional Figure 2 ;

[0016] Figure 3 The utility model discloses a photovoltaic inverter main body structure three-dimensional view;

[0017] Figure 4 The utility model discloses a harmonic suppression mechanism three-dimensional view.

[0018] In the drawing: 1, inverter mechanism;2, protective steel shell;3, harmonic suppression mechanism;11, inverter main body;12, input output interface;13, first mounting seat;14, second mounting seat;15, flow guide fan;16, heat dissipation hole;17, heat dissipation fin;18, flow guide hole;31, circuit monitor;32, first heat dissipation groove;33, first line card;34, high performance filter;35, second heat dissipation groove;36, second line card. DETAILED DESCRIPTION

[0019] The embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0020] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of " is two or more than two;The orientation or position relation indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a particular orientation, to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it is necessary to point out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Please refer to Figures 1-4The utility model discloses an embodiment of a kind of photovoltaic inverters, including inverter mechanism 1, inverter mechanism 1 includes inverter main body 11, inverter main body 11 is photovoltaic module, inverter main body 11 front end is fixedly installed with protective steel shell 2 via screw, inverter main body 11 bottom end two sides each are provided with one through slot, and fixedly installed by flow guide fan 15 in through slot, inverter main body 11 top end is horizontally equidistantly provided with multiple heat dissipation holes 16, inverter main body 11 both ends each fixedly connected with a group of radiating fins 17, a group of radiating fins 17 are multiple and equidistantly set from top to bottom, three flow guide holes 18 are equidistantly provided from front to back between upper and lower two side walls of radiating fin 17, protective steel shell 2 is fixedly installed via screw in the whole inverter main body 11 front end, strengthen the reliability of product, simultaneously, adopt better three-dimensional heat dissipation structure and cooling technology, inverter main body 11 bottom end is fixedly installed with two flow guide fans 15 in symmetry, it can be imported into airflow to inverter main body 11 by bottom, and the airflow carries out inverter main body 11 internal heat and is discharged by upper heat dissipation hole 16, ensure that inverter inside can be efficiently cooled, in addition, inverter both ends each fixedly connected with multiple radiating fins 17, further assist inverter main body 11 heat dissipation, avoid the problems such as that high temperature can appear electronic component aging, poor heat dissipation, circuit failure.

[0023] Inverter main body 11 is provided with harmonic suppression mechanism 3, harmonic suppression mechanism 3 includes high-performance filter 34 fixedly installed on one side of inverter main body 11 rear end, harmonic suppression mechanism 3 also includes circuit monitor 31 fixedly installed on the other side of inverter main body 11 rear end, high-performance filter 34 is provided with two filter capacitors, high-performance filter 34 bottom end is electrically connected with inverter main body 11 via connecting flat cable, circuit monitor 31 bottom end is electrically connected with inverter main body 11 via connecting line, the whole adopts advanced harmonic suppression technology, that is, increase high-performance filter 34, it is provided with two filter capacitors, the current output by inverter is filtered and handled, reduces harmonic content, and is provided with circuit monitor 31, reduces harmonic component by built-in pulse width modulation PWM algorithm, and the monitoring and management of inverter output power quality, ensure that it meets relevant standards and requirements.

[0024] Two first mounting seats 13 are fixedly connected in symmetry above inverter main body 11 rear end, two second mounting seats 14 are fixedly connected in symmetry below inverter main body 11 rear end, a plurality of input and output interfaces 12 are arranged on the front end of the bottom of inverter main body 11, and the whole photovoltaic inverter can be fixedly installed by mounting seat cooperation installation component, and the circuit connection of inverter is carried out through input and output interface 12.

[0025] The circuit monitor 31 is provided with a plurality of first heat dissipation grooves 32 in a horizontal equidistant manner on the other side of the bottom end, which can assist the circuit monitor 31 in heat dissipation; the high-performance filter 34 is provided with a plurality of second heat dissipation grooves 35 in a top-to-bottom equidistant manner on one end, which can assist the high-performance filter 34 in heat dissipation; the first wire clamp 33 is fixedly sleeved with the outer side of the connecting wire, which plays a fixing role of the connecting wire; the second wire clamp 36 is fixedly sleeved with the outer side of the connecting wire, which plays a fixing role of the connecting wire; and the first wire clamp 33 and the second wire clamp 36 are fixedly connected to the bottom end of the inverter main body 11.

[0026] The working principle of the utility model is: the integral photovoltaic inverter can be fixedly installed through the mounting seat and the installation assembly, and the circuit connection of the inverter is realized through the input and output interface 12; the photovoltaic cell panel of the inverter main body 11 generates direct current, while the household and most electrical equipment use alternating current; the photovoltaic inverter can convert the direct current into alternating current, and create an analog sine wave through the pulse width modulation PWM technology, so as to ensure that the frequency and amplitude of the output current are matched with the public power grid; the advanced harmonic suppression technology is adopted, that is, the high-performance filter 34 is increased, which is provided with two filter capacitors, so as to filter and process the current output by the inverter, reduce the harmonic content, and is provided with the circuit monitor 31; through the built-in pulse width modulation PWM algorithm, the harmonic component is reduced, and the monitoring and management of the output power quality of the inverter are realized, so as to ensure that the inverter meets the relevant standards and requirements.

[0027] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this; any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A photovoltaic inverter, comprising an inverter mechanism (1), wherein the inverter mechanism (1) comprises an inverter body (11) which is a photovoltaic assembly; characterized in that A protective steel shell (2) is fixedly installed at the front end of the inverter body (11) through screws, a through slot is formed at each side of the bottom end of the inverter body (11), and a flow guide fan (15) is fixedly installed in the through slot; A plurality of heat dissipation holes (16) are horizontally and equidistantly formed at the top end of the inverter body (11), and a group of heat dissipation fins (17) are fixedly connected to each end of the inverter body (11); The inverter body (11) is provided with a harmonic suppression mechanism (3), wherein the harmonic suppression mechanism (3) comprises a high-performance filter (34) fixedly installed at one side of the rear end of the inverter body (11), and further comprises a circuit monitor (31) fixedly installed at the other side of the rear end of the inverter body (11); The high-performance filter (34) is provided with two filter capacitors, the bottom end of the high-performance filter (34) is electrically connected to the inverter body (11) through a connecting wire, and the bottom end of the circuit monitor (31) is electrically connected to the inverter body (11) through a connecting wire.

2. A photovoltaic inverter according to claim 1, characterized in that: A group of the heat dissipation fins (17) are multiple and equidistantly arranged from top to bottom.

3. A photovoltaic inverter according to claim 1, characterized in that: Three flow guide holes (18) are equidistantly formed from front to back between the upper and lower sidewalls of the heat dissipation fins (17).

4. A photovoltaic inverter according to claim 1, characterized in that: Two first mounting seats (13) are fixedly and symmetrically connected above the rear end of the inverter body (11), and two second mounting seats (14) are fixedly and symmetrically connected below the rear end of the inverter body (11).

5. The photovoltaic inverter of claim 1, wherein: A plurality of input and output interfaces (12) are arranged at the front end of the bottom of the inverter body (11).

6. A photovoltaic inverter according to claim 1, characterized in that: A plurality of first heat dissipation grooves (32) are equidistantly formed at the bottom end of the circuit monitor (31) on the other side, and a plurality of second heat dissipation grooves (35) are equidistantly formed at one end of the high-performance filter (34) from top to bottom.

7. The photovoltaic inverter of claim 1, wherein: A first wire clamp (33) is fixedly sleeved outside the connecting wire, a second wire clamp (36) is fixedly sleeved outside the connecting wire, and the top ends of the first wire clamp (33) and the second wire clamp (36) are fixedly connected to the bottom end of the inverter body (11).

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