CN224054109U

CN224054109U - Photovoltaic inverter

Info

Publication number: CN224054109U
Application number: CN202520758158.9U
Authority: CN
Inventors: 曾志刚; 李静; 邹俐
Original assignee: Shenzhen Hongneng Digital Energy Co ltd
Current assignee: Shenzhen Hongneng Digital Energy Co ltd
Priority date: 2025-04-21
Filing date: 2025-04-21
Publication date: 2026-03-27
Anticipated expiration: 2035-04-21

Abstract

The utility model relates to the technical field of inverters and discloses a photovoltaic inverter which comprises an inversion mechanism, wherein the inversion mechanism comprises an inverter main body, the inverter main body is a photovoltaic module, a protective steel shell is fixedly arranged at the front end of the inverter main body through screws, a through groove is respectively formed in two sides of the bottom end of the inverter main body, a flow guide fan is fixedly arranged in the through groove, and a plurality of radiating holes are formed in the top end of the inverter main body in a horizontal equidistant mode. The utility model adopts advanced harmonic suppression technology, namely, a high-performance filter is added, the high-performance filter is provided with two filter capacitors, the current output by the inverter is subjected to filter treatment, the harmonic content is reduced, a circuit monitor is arranged, the harmonic component is reduced through a built-in Pulse Width Modulation (PWM) algorithm, and the monitoring and management of the power quality output by the inverter are ensured to meet relevant standards and requirements.

Description

Photovoltaic inverter

Technical Field

The utility model relates to the technical field of inverters, in particular to a photovoltaic inverter.

Background

An inverter is a power electronic device that converts Direct Current (DC) into Alternating Current (AC), and converts the direct current into the alternating current by switching operations of power semiconductor devices (e.g., IGBTs, MOSFETs, etc.). First, the direct current passes through a switching circuit composed of one or more power semiconductor devices, which are switched at a certain frequency and duty cycle to chop the direct current into a series of pulse signals. Currently, inverters are of a wide variety, including photovoltaic inverters.

The existing photovoltaic inverter has the following problems that harmonic components possibly exist in alternating current output by the photovoltaic inverter, the harmonic components can interfere a power grid and other electric equipment to influence the quality of electric energy, overheat and loss increase of power grid equipment can be caused by long-term operation, even power system faults are caused, in addition, the photovoltaic inverter usually needs to operate for a long time under outdoor severe environmental conditions, such as the problems of ageing of electronic elements, poor heat dissipation, circuit faults and the like can occur at high temperature, and system shutdown or performance reduction can be caused.

Disclosure of utility model

The technical problem to be solved.

Aiming at the defects of the prior art, the utility model provides a photovoltaic inverter, which solves the problems proposed by the background technology.

And (II) technical scheme.

The photovoltaic inverter comprises an inverter body, wherein the inverter body is a photovoltaic module, a protective steel shell is fixedly arranged at the front end of the inverter body through screws, a through groove is respectively formed in two sides of the bottom end of the inverter body, a flow guide fan is fixedly arranged in the through groove, a plurality of heat dissipation holes are formed in the top end of the inverter body in a horizontal equidistant mode, a group of heat dissipation fins are fixedly connected to the two ends of the inverter body, the heat dissipation fins are arranged in a plurality of mode from top to bottom in an equidistant mode, and three flow guide holes are formed in the upper side wall and the lower side wall of the heat dissipation fins in a mode from front to back in an equidistant mode.

In still a further aspect of the present utility model, the inverter main body is provided with a harmonic suppression mechanism, the harmonic suppression mechanism includes a high-performance filter fixedly mounted on one side of a rear end of the inverter main body, the harmonic suppression mechanism further includes a circuit monitor fixedly mounted on the other side of the rear end of the inverter main body, the high-performance filter is provided with two filter capacitors, a bottom end of the high-performance filter is electrically connected with the inverter main body via a connection flat cable, and a bottom end of the circuit monitor is electrically connected with the inverter main body via a connection cable.

As a still further scheme of the utility model, two first mounting seats are symmetrically and fixedly connected above the rear end of the inverter main body, two second mounting seats are symmetrically and fixedly connected below the rear end of the inverter main body, and a plurality of input and output interfaces are arranged at the front end of the bottom of the inverter main body.

As a still further scheme of the utility model, the other side of the bottom end of the circuit monitor is provided with a plurality of first radiating grooves in a horizontal equidistant mode, one end of the high-performance filter is provided with a plurality of second radiating grooves in a top-down equidistant mode, the outer side of the connecting flat cable is fixedly sleeved with a first line clamp, the outer side of the connecting wire is fixedly sleeved with a second line clamp, and the top ends of the first line clamp and the second line clamp are fixedly connected to the bottom end of the inverter main body.

Compared with the prior art, the utility model has the beneficial effects that:

1. In the utility model, the advanced harmonic suppression technology is adopted, namely a high-performance filter is added, the high-performance filter is provided with two filter capacitors, the current output by the inverter is subjected to filter treatment, the harmonic content is reduced, a circuit monitor is arranged, the harmonic component is reduced through a built-in Pulse Width Modulation (PWM) algorithm, and the monitoring and management of the power quality output by the inverter are ensured to meet relevant standards and requirements.

2. According to the utility model, the front end of the inverter main body is fixedly provided with the protective steel shell through the screw, so that the reliability of a product is enhanced, meanwhile, a better three-dimensional heat dissipation structure and a cooling technology are adopted, the bottom end of the inverter main body is symmetrically and fixedly provided with two guide fans, air flow can be led into the inverter main body through the bottom, the air flow brings heat in the inverter main body out of the upper heat dissipation holes and is discharged, the high-efficiency heat dissipation in the inverter is ensured, in addition, the two ends of the inverter are fixedly connected with a plurality of heat dissipation fins respectively, the heat dissipation of the inverter main body is further assisted, and the problems that electronic elements are aged, poor in heat dissipation, circuit faults and the like can be avoided at high temperature.

Drawings

FIG. 1 is a perspective view of the whole of the present utility model;

FIG. 2 is a second perspective view of the whole of the present utility model;

fig. 3 is a perspective view of a main structure of the photovoltaic inverter of the present utility model;

fig. 4 is a perspective view of the harmonic suppression mechanism of the present utility model.

In the figure, 1, an inversion mechanism; 2, a protective steel shell, 3, a harmonic suppression mechanism, 11, an inverter main body, 12, an input/output interface, 13, a first mounting seat, 14, a second mounting seat, 15, a guide fan, 16, a radiating hole, 17, a radiating fin, 18, a guide hole, 31, a circuit monitor, 32, a first radiating groove, 33, a first line card, 34, a high-performance filter, 35, a second radiating groove, 36 and a second line card.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more, and the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-4, in an embodiment of the utility model, a photovoltaic inverter comprises an inverter mechanism 1, the inverter mechanism 1 comprises an inverter main body 11, the inverter main body 11 is a photovoltaic module, a protective steel shell 2 is fixedly arranged at the front end of the inverter main body 11 through screws, two through grooves are respectively formed at two sides of the bottom end of the inverter main body 11, a flow guiding fan 15 is fixedly arranged in each through groove, a plurality of heat dissipation holes 16 are formed at the top end of the inverter main body 11 in a horizontal equidistant manner, a group of heat dissipation fins 17 are fixedly connected at two ends of the inverter main body 11, the heat dissipation fins 17 are in a plurality of heat dissipation fins and are in a top-down equidistant manner, three flow guiding holes 18 are formed between the upper side wall and the lower side wall of the heat dissipation fins 17 in a front-back equidistant manner, the front end of the inverter main body 11 is fixedly provided with the protective steel shell 2 through screws, the reliability of a product is enhanced, meanwhile, a better three-dimensional heat dissipation structure and a cooling technology are adopted, the bottom end of the inverter main body 11 is symmetrically fixedly provided with two guide fans 15, air flow can be led into the inverter main body 11 through the bottom, the air flow brings the heat inside the inverter main body 11 out of the upper heat dissipation holes 16, the efficient heat dissipation inside the inverter is ensured, in addition, the two ends of the inverter are fixedly connected with a plurality of heat dissipation fins 17, the heat dissipation of the inverter main body 11 is further assisted, and the problems that electronic elements are aged, poor in heat dissipation, circuit faults and the like can be avoided.

The inverter main body 11 is provided with the harmonic suppression mechanism 3, the harmonic suppression mechanism 3 comprises a high-performance filter 34 fixedly arranged on one side of the rear end of the inverter main body 11, the harmonic suppression mechanism 3 further comprises a circuit monitor 31 fixedly arranged on the other side of the rear end of the inverter main 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 with the inverter main body 11 through a connecting flat cable, the bottom end of the circuit monitor 31 is electrically connected with the inverter main body 11 through a connecting wire, an advanced harmonic suppression technology is integrally adopted, namely, the high-performance filter 34 is added, two filter capacitors are arranged, the current output by the inverter is subjected to filtering treatment, the harmonic content is reduced, and the circuit monitor 31 is arranged, and through a built-in pulse width modulation PWM algorithm, the harmonic component is reduced, and the monitoring and management of the power quality of the output of the inverter are ensured to meet relevant standards and requirements.

Two first mount pads 13 are symmetrically fixedly connected above the rear end of the inverter main body 11, two second mount pads 14 are symmetrically fixedly connected below the rear end of the inverter main body 11, a plurality of input and output interfaces 12 are arranged at the front end of the bottom of the inverter main body 11, and the whole photovoltaic inverter can be fixedly mounted through the mount pads matched with the mounting assembly and is connected with a circuit of the inverter through the input and output interfaces 12.

The circuit monitor 31 bottom opposite side is the horizontal equidistance form and has seted up a plurality of first heat dissipation grooves 32, can assist circuit monitor 31 heat dissipation, and a plurality of second heat dissipation grooves 35 have been seted up to high performance filter 34 one end top-down equidistance form, can assist high performance filter 34 heat dissipation, and the fixed first line card 33 that has cup jointed of connection winding displacement outside plays the fixed effect of connection winding displacement, and the fixed second ply-yarn drill 36 that has cup jointed in the connection line outside plays the fixed effect of connection line, and first line card 33 and second ply-yarn drill 36 top fixed connection are in inverter main part 11 bottom.

The utility model has the working principle that the integral photovoltaic inverter can be fixedly installed through the installation seat matched with the installation assembly and is connected with the circuit of the inverter through the input/output interface 12, the photovoltaic panel of the inverter main body 11 generates direct current, the household and most electric equipment use alternating current, the photovoltaic inverter can convert the direct current into the alternating current, an analog sine wave is created through a Pulse Width Modulation (PWM) technology, the frequency and the amplitude of output current are ensured to be matched with a public power grid, an advanced harmonic suppression technology is adopted as a whole, namely a high-performance filter 34 is added, two filter capacitors are arranged, the current output by the inverter is subjected to filter treatment, the harmonic content is reduced, a circuit monitor 31 is arranged, the harmonic component is reduced, and the monitoring and the management of the quality of the electric energy output by the inverter are ensured to meet relevant standards and requirements.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The photovoltaic inverter comprises an inverter mechanism (1), wherein the inverter mechanism (1) comprises an inverter main body (11), and the inverter main body (11) is a photovoltaic module;

The novel inverter is characterized in that a protective steel shell (2) is fixedly arranged at the front end of the inverter main body (11) through screws, a through groove is respectively formed in two sides of the bottom end of the inverter main body (11), and a flow guiding fan (15) is fixedly arranged in the through groove;

A plurality of radiating holes (16) are formed in the top end of the inverter main body (11) in a horizontal equidistant mode, and a group of radiating fins (17) are fixedly connected to two ends of the inverter main body (11);

The inverter main body (11) is provided with a harmonic suppression mechanism (3), the harmonic suppression mechanism (3) comprises a high-performance filter (34) fixedly arranged on one side of the rear end of the inverter main body (11), and the harmonic suppression mechanism (3) further comprises a circuit monitor (31) fixedly arranged on the other side of the rear end of the inverter main 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 with the inverter main body (11) through a connecting flat cable, and the bottom end of the circuit monitor (31) is electrically connected with the inverter main body (11) through a connecting wire.

2. The photovoltaic inverter according to claim 1, wherein a plurality of the heat dissipation fins (17) are disposed at equal distance from top to bottom.

3. The photovoltaic inverter of claim 1, wherein three diversion holes (18) are formed between the upper and lower side walls of the heat dissipation fin (17) at equal intervals from front to back.

4. The photovoltaic inverter of claim 1, wherein two first mounting seats (13) are symmetrically and fixedly connected above the rear end of the inverter main body (11), and two second mounting seats (14) are symmetrically and fixedly connected below the rear end of the inverter main body (11).

5. A photovoltaic inverter according to claim 1, characterized in that the front end of the bottom of the inverter body (11) is provided with a plurality of input/output interfaces (12).

6. The photovoltaic inverter of claim 1, wherein a plurality of first heat dissipation grooves (32) are formed in the other side of the bottom end of the circuit monitor (31) in a horizontal equidistant mode, and a plurality of second heat dissipation grooves (35) are formed in one end of the high-performance filter (34) in a top-down equidistant mode.

7. The photovoltaic inverter of claim 1, wherein a first wire clip (33) is fixedly sleeved on the outer side of the connecting flat cable, a second wire clip (36) is fixedly sleeved on the outer side of the connecting wire, and the top ends of the first wire clip (33) and the second wire clip (36) are fixedly connected to the bottom end of the inverter main body (11).