CN211239702U

CN211239702U - Can splice circuit board and dc-to-ac converter

Info

Publication number: CN211239702U
Application number: CN201921816107.8U
Authority: CN
Inventors: 林正为
Original assignee: Green Power Electronic Co ltd
Current assignee: Green Power Electronic Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-08-11
Anticipated expiration: 2029-10-25

Abstract

The utility model provides a circuit board and an inverter which can be spliced, wherein the circuit board comprises a control board and an expansion board; the control board comprises a DC-AC board and a first DC-DC board; the expansion board comprises at least one expansion DC-DC board; the expansion board is provided with an input end connecting line and an output end connecting line, the input end connecting line is connected with the output end of the first DC-DC board, and the output end connecting line is connected with the input end of the DC-AC board; the expansion DC-DC board is provided with splicing ends, and when a plurality of expansion DC-DC boards are arranged, the plurality of expansion DC-DC boards are interconnected through the splicing ends to form a series structure; and after the expansion DC-DC board is connected with the control board, the DC-DC conversion power of the circuit board is improved. The utility model discloses an increase and decrease of extension DC-DC board, reach the purpose of producing different power inverters. After the extended DC-DC board is arranged, the inverter has strong expandability and convenient production, and the arranged extended DC-DC board has reasonable layout and beautiful appearance.

Description

Can splice circuit board and dc-to-ac converter

Technical Field

The utility model relates to an inverter technical field, in particular to circuit board and dc-to-ac converter can splice.

Background

An inverter is a device for converting direct current into alternating current, and is actually a voltage inversion process with a converter. The converter converts an ac voltage of a power grid into a stable dc output, and the inverter converts a dc voltage output from an adapter, a battery, or the like into a high-frequency high-voltage ac. Because different devices have different requirements on voltage, namely, the output power of the inverter, the production, test and installation of the inverter are limited, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective is the circuit board and the dc-to-ac converter that can splice that provide, aim at solving the problem that dc-to-ac converter scalability is poor, production and installation effectiveness are low.

In order to achieve the above object, the present invention provides a circuit board capable of being spliced, wherein the circuit board comprises a control board and an expansion board; the control board comprises a DC-AC board and a first DC-DC board; the expansion board comprises at least one expansion DC-DC board;

the expansion board is provided with an input end connecting line and an output end connecting line, the input end connecting line is connected with the output end of the first DC-DC board, and the output end connecting line is connected with the input end of the DC-AC board;

the expansion DC-DC board is provided with splicing ends, and when a plurality of expansion DC-DC boards are arranged, the plurality of expansion DC-DC boards are interconnected through the splicing ends to form a series structure;

and after the expansion DC-DC board is connected with the control board, the DC-DC conversion power of the circuit board is improved.

Furthermore, a boosting high-voltage capacitor, a high-voltage IGBT tube, an LC filter capacitor and a relay are arranged on the DC-AC board.

Furthermore, a first filter capacitor, a first MOS transistor, a first transformer, and a first rectifying tube are disposed on the first DC-DC board.

Furthermore, an extended filter capacitor, an extended MOS tube, an extended transformer and an extended rectifier tube are arranged on the extended DC-DC board.

Further, the first DC-DC board includes a first DC input positive copper bar and a first DC input negative copper bar; the extended DC-DC board comprises an extended DC input positive copper bar and an extended DC input negative copper bar;

the first DC input positive copper bar is electrically connected with the extended DC input positive copper bar; the first DC input negative copper bar is electrically connected with the extended DC input negative copper bar.

Furthermore, an MOS tube radiator is arranged on the first MOS tube, and a rectifier tube radiator is arranged on the first rectifier tube.

Further, an MOS tube radiator is arranged on the expansion MOS tube, and a rectifier tube radiator is arranged on the expansion rectifier tube.

Furthermore, a plurality of first MOS pipe sets up be close to the edge at first DC-DC board bottom, and is a plurality of first MOS pipe is parallel with the base, and is perpendicular it has set gradually on the base direction first rectifier tube first transformer first filter capacitor.

Furthermore, a plurality of the extension MOS tubes are arranged at the bottom edge of the extension DC-DC plate close to the edge, and the extension MOS tubes are parallel to the bottom edge and vertical to the bottom edge, the extension rectifying tube, the extension transformer and the extension filter capacitor are sequentially arranged in the direction of the bottom edge.

The utility model discloses provide an inverter simultaneously, including above-mentioned arbitrary one can splice circuit board.

Drawings

Fig. 1 is a schematic structural diagram of a circuit board capable of being spliced according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a circuit board capable of being spliced according to another embodiment of the present invention;

fig. 3 is a schematic diagram of an extended DC-DC board structure according to another embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As used herein, the singular forms "a", "an", "the" and "the" include plural referents unless the content clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, units, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Referring to fig. 1 to 3, the present invention provides a circuit board capable of being spliced, wherein the circuit board comprises a control board and an expansion board; the control board comprises a DC-AC board 1 and a first DC-DC board 2; the expansion board comprises at least one expansion DC-DC board 3;

the expansion board is provided with an input end connecting line and an output end connecting line, the input end connecting line is connected with the output end of the first DC-DC board 2, and the output end connecting line is connected with the input end of the DC-AC board 1;

the expansion DC-DC board 3 is provided with splicing ends 4, and when a plurality of expansion DC-DC boards 3 are provided, the plurality of expansion DC-DC boards 3 are interconnected through the splicing ends 4 to form a series structure;

and after the expansion DC-DC board 3 is connected with the control board, the DC-DC conversion power of the circuit board is improved.

In this embodiment, the above-mentioned spliceable circuit board refers to a circuit board for an inverter, which can be disassembled and assembled between circuit boards, and the effect of adjusting the power of the inverter is achieved by adding or reducing the extension DC-DC board 3. The control board comprises all circuits and elements required by the normal operation of the inverter, the extended DC-DC board 3 is not connected, the minimum power of the inverter is obtained, and the purpose of improving the output power of the inverter is achieved by connecting the extended DC-DC board 3. For example, the output power of the inverter is 1KW when the extended DC-DC board 3 is not connected, the output power of the inverter is 2KW when one extended DC-DC board 3 is connected, and the output power of the inverter is 3KW when two extended DC-DC boards 3 are connected. When the plurality of extended DC-DC boards 3 are provided, the plurality of extended DC-DC boards 3 are first interconnected by the splicing terminals to form a serial structure, the plurality of extended DC-DC boards 3 after the serial connection have an input terminal connection line and an output terminal connection line respectively connected to the output terminal of the first DC-DC board 2, and the input terminal of the DC-AC board 1 completes the connection of the extended DC-DC boards 3. The splicing mode of the extended DC-DC plates 3 effectively improves the expansibility of the inverter, so that when the inverters with different specifications are required to be produced, only the connected extended DC-DC plates 3 are required to be increased or reduced, and the production efficiency of the inverter is effectively improved.

In one embodiment, the DC-AC board 1 includes a boost high voltage capacitor 5, a high voltage IGBT tube 6, an LC filter capacitor 7, and a relay 8.

In this embodiment, the DC-AC board 1 is a module for converting direct current into alternating current, wherein the boost high-voltage capacitor 5 and the high-voltage IGBT tube 6 are selected to prevent the inverter from being damaged by peak power. For example, a 25 inch digital color tv consumes about 80 watts during normal operation and has up to 1450 watts during the power-on period. Therefore, it is important to select the boosting high-voltage capacitor 5 and the high-voltage IGBT tube 6.

In one embodiment, the first DC-DC board 2 includes a first filter capacitor 9, a first MOS transistor 10, a first transformer 11, and a first rectifying transistor 12.

In one embodiment, the extended DC-DC board 3 includes an extended filter capacitor 13, an extended MOS transistor 14, an extended transformer 15, and an extended rectifier 16.

In the above two embodiments, the DC-DC module, i.e. the DC conversion module, converts the DC power of the power supply terminal into the DC power required by the DC-AC board 1. When the number of the extended DC-DC boards 3 is multiple, the direct current required by the multiple groups of DC-AC boards 1 can be provided at the same time, and the output power of the inverter is further improved after the direct current is converted by the DC-AC boards 1.

In one embodiment, the first DC-DC board 2 comprises a first DC input positive copper bar 17a and a first DC input negative copper bar 17 b; the extended DC-DC board 3 comprises an extended DC input positive copper bar 18a and an extended DC input negative copper bar 18 b;

the first DC input positive copper bar 17a is electrically connected with the extended DC input positive copper bar 18 a; the first DC input negative copper bar 17b is electrically connected to the extended DC input negative copper bar 18 b.

In the embodiment, the input end of the DC-DC module is made of a copper bar, and the copper bar has the advantages of low resistivity, low loss and high inverter conversion rate; and ductility, good heat dissipation, difficult fracture, be difficult for receiving the influence of extension DC-DC board 3 dismouting promptly. The part of the extended DC-DC board 3 connected together through the copper bar is the splicing end. The first DC input positive copper bar 17a and the first DC input negative copper bar 17b are provided with first connecting holes, the extended DC input positive copper bar 18a and the extended DC input negative copper bar 18b are provided with second connecting holes, and hole positions are staggered up and down or staggered front and back when the first connecting holes and the second connecting holes are arranged to form a complementary structure.

In one embodiment, a first MOS device heat sink 10a is disposed on the first MOS device 10, and a first rectifier device heat sink 12a is disposed on the first rectifier device 12.

In one embodiment, an extended MOS device heat sink 14a is disposed on the extended MOS device 14, and an extended rectifier device heat sink 16a is disposed on the extended rectifier device 16.

In one embodiment, the plurality of first MOS transistors 10 are disposed on the bottom side of the first DC-DC board 2 near the edge, and the plurality of first MOS transistors 10 are parallel to the bottom side, and the first rectifying transistor 12, the first transformer 11, and the first filter capacitor 9 are sequentially disposed in a direction perpendicular to the bottom side.

In the present embodiment, since the first MOS transistor 10, the first rectifier 12, the first transformer 11, and the first filter capacitor 9 are all power devices, especially the first MOS transistor 10 and the first rectifier 12, heat generation is more serious. Therefore, based on the requirement of heat dissipation, when the circuit board is disposed, the first MOS transistor 10 and the first rectifying transistor 12 are separated from each other, and a corresponding heat sink is disposed, and it is more reasonable to dispose the plurality of first MOS transistors 10 at positions close to the bottom side of the circuit board and the first rectifying transistor 12 at a position farthest from the bottom side, and then dispose the first transformer 11 and the first filter capacitor 9 between the first MOS transistor 10 and the first rectifying transistor 12, so as to form the most reasonable layout for heat dissipation.

In one embodiment, the plurality of extended MOS transistors 14 are disposed on the bottom side of the extended DC-DC board 3 near the edge, and the plurality of extended MOS transistors 14 are parallel to the bottom side, and the extended rectifying transistor 16, the extended transformer 15, and the extended filter capacitor 13 are sequentially disposed in a direction perpendicular to the bottom side.

In the present embodiment, since the extended MOS transistor 14, the extended rectifier 16, the extended transformer 15, and the extended filter capacitor 13 are all power devices, especially the extended MOS transistor 14 and the extended rectifier 16, heat generation is more serious. Therefore, based on the requirement of heat dissipation, when the circuit board is disposed, the expansion MOS transistor 14 and the expansion rectifier 16 are separated from each other, and a corresponding heat sink is disposed, and it is more reasonable to dispose the expansion MOS transistors 14 at the positions close to the bottom side of the circuit board and the expansion rectifier 16 at the position farthest from the bottom side, and then dispose the expansion transformer 15 and the expansion filter capacitor 13 between the two, so as to form the most reasonable layout for heat dissipation.

A plurality of details described in the embodiment of the spliceable circuit board are all applicable to this embodiment, and are not described herein again to avoid repetition.

The above only be the preferred embodiment of the utility model discloses a not consequently the restriction the utility model discloses a patent range, all utilize the utility model discloses equivalent structure or equivalent flow transform that description and drawing were done, or direct or indirect application is in other relevant technical field, and all the same reason is included the utility model discloses a patent protection within range.

Claims

1. The circuit board capable of being spliced is characterized by comprising a control board and an expansion board; the control board comprises a DC-AC board and a first DC-DC board; the expansion board comprises at least one expansion DC-DC board;

2. The spliceable circuit board of claim 1, wherein the first DC-DC board comprises a first DC input positive copper bar and a first DC input negative copper bar; the extended DC-DC board comprises an extended DC input positive copper bar and an extended DC input negative copper bar;

3. An inverter, characterized by comprising a spliceable circuit board according to any one of claims 1-2.