CN212850286U

CN212850286U - High-efficiency inverter for converting DC48V into AC380V

Info

Publication number: CN212850286U
Application number: CN202021097073.4U
Authority: CN
Inventors: 于洋; 张欣禹; 索红亮
Original assignee: BEIJING IN-POWER NEW ENERGY CO LTD
Current assignee: BEIJING IN-POWER NEW ENERGY CO LTD; Beijing Yingbojie Hydrogen Technology Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-03-30
Anticipated expiration: 2030-06-15

Abstract

The utility model discloses a by DC48V commentaries on classics AC 380V's high efficiency inverter relates to inverter technical field. The utility model comprises a shell; a DC-DC boosting box, a DC-AC inverting box and an isolating transformation box are respectively arranged on the inner side surface of the first shell; one side surface of the DC-DC boosting box is provided with a first DC input end, and the other side surface of the DC-DC boosting box is provided with a DC output end; one side surface of the DC-AC inversion box is provided with a DC input end, and the other side surface is provided with an AC output end; an AC input end is installed on one side surface of the isolation transformation box, and a first AC output end is installed on the other side surface of the isolation transformation box. The utility model greatly improves the total efficiency of the inverter by the design of the DC-DC boosting box, the DC-AC inversion box and the isolation transformation box, and the total efficiency of the device can reach 91% when the device is input into the DC converter and output by 380VAC and output by 6 kW; the isolation transformation box is arranged behind the DC-AC inversion box, so that the boosting pressure of the DC-DC part is relieved, the efficiency of the DC-AC inversion box is improved, the efficiency of each part is balanced, and the effect of safety isolation is achieved.

Description

High-efficiency inverter for converting DC48V into AC380V

Technical Field

The utility model belongs to the technical field of the inverter, especially, relate to a change AC 380V's high efficiency inverter by DC 48V.

Background

The inverter is a converter which converts direct current electric energy (batteries and storage batteries) into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current (generally 220V, 50Hz sine wave). It is composed of inverter bridge, control logic and filter circuit. The multifunctional electric grinding wheel is widely applicable to air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, computers, televisions, washing machines, smoke exhaust ventilators, refrigerators, video recorders, massagers, fans, lighting and the like. In foreign countries, due to the higher popularization rate of automobiles, the inverter can be used for connecting the storage battery to drive electric appliances and various tools to work when going out for work or traveling. And most of the power inverter power supplies are connected to the battery through connecting wires. Connecting the household appliance to the output of the power converter enables the use of a variety of appliances in the vehicle. Usable electric appliances are: mobile phones, notebook computers, digital video cameras, lighting lamps, electric shavers, CD machines, game machines, palm computers, electric tools, vehicle-mounted refrigerators, and various traveling, camping, medical first-aid appliances.

With the continuous development and progress of the electronic industry, the requirements of people on the performance indexes of products are more and more strict. The inverter is widely applied to the fields of new energy, micro power grids and the like, and the requirement on the efficiency of the inverter is higher and higher. The efficiency is improved, the working time can be prolonged, the electric energy cost can be saved, and meanwhile, the requirement on heat dissipation is also reduced. Because the input direct current voltage is low and the current is large, the output alternating current voltage is high, and the efficiency of the pre-stage boosting part of the inverter is lower along with the boosting of the power. The current commercial inverter mostly adopts a scheme of one-stage or multi-stage DC-DC boosting, DC-AC inversion and isolation of an isolation transformer, and the overall efficiency of the inverter with the same input voltage is only about 88 percent; most inverters are installed outdoors, such as inverters of wind power generation devices, dust easily enters the inverters to greatly affect normal use of the inverters, heat is generated more, and a high-efficiency heat dissipation system needs to be provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a by DC48V commentaries on classics AC 380V's high efficiency DC-to-AC converter steps up box, DC-AC contravariant box, isolation vary voltage box, first prevent the design of grey net and first heat dissipation fan through DC-DC, it is not high to have solved current DC-to-AC converter whole efficiency when input voltage is the same, easily advance the whole operating efficiency of dust influence DC-to-AC converter, and the radiating effect is not good, the relatively poor problem of security.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a high-efficiency inverter converting DC48V into AC380V, which comprises a shell; a DC-DC boosting box, a DC-AC inversion box and an isolation transformation box are respectively arranged on the inner side surface of the shell; one side surface of the DC-DC boosting box is provided with a first DC input end, and the other side surface of the DC-DC boosting box is provided with a DC output end; one side surface of the DC-AC inversion box is provided with a DC input end, and the other side surface of the DC-AC inversion box is provided with an AC output end; one side surface of the isolation transformation box is provided with an AC input end, and the other side surface of the isolation transformation box is provided with a first AC output end; a second direct current input end and a second alternating current output end are respectively arranged on one outer side surface of the shell; the second direct current input end is positioned above the second alternating current output end.

Furthermore, a plurality of heat dissipation holes are formed in the peripheral side face of the DC-DC boosting box, the peripheral side face of the DC-AC inverting box and the peripheral side face of the isolation transformation box.

Further, a first heat dissipation fan and a second heat dissipation fan are respectively installed at the bottom and the top of the shell.

Furthermore, a plurality of support columns are installed at the top of the shell; the top of the supporting column is fixedly connected with a rainproof disc.

Furthermore, a plurality of first clamping grooves are formed in the bottom in the shell; a first ash-proof net is in clearance fit with the inner wall of the first clamping groove.

Furthermore, a second clamping groove and a limiting groove are respectively formed in the opposite inner side surface of the shell, and a sliding groove is fixedly connected to the other inner side surface of the shell; a second ash-proof net is in clearance fit with the inner wall of the second clamping groove; the second prevents that grey net week side and spout inner wall clearance fit and the second prevents that grey net side runs through the spacing groove.

Further, the second direct current input end and the first direct current input end are connected through a cable, and the input voltage is 48V; the second alternating current output end and the first alternating current output end are connected through a cable, and the output voltage is 380V.

Further, the DC-DC boosting box internally comprises a plurality of silicon carbide diodes and silicon carbide MOS tubes which are connected in parallel.

Further, the voltage of the DC output end and the voltage of the DC input end are both 200V; and the output voltage of the AC output end and the input voltage of the AC input end are both 100V.

The utility model discloses following beneficial effect has:

1. the utility model discloses a DC-DC steps up the design of box, DC-AC contravariant box and isolation vary voltage box, has promoted the total efficiency of DC-to-AC converter greatly, and the test can reach 91% when 48VDC input 380VAC exports 6kW to the device total efficiency.

2. The utility model discloses a set up the isolation vary voltage box behind DC-AC contravariant box, alleviated the pressure that steps up of DC-DC part, made its efficiency promote, balanced each partial efficiency plays the effect of safety isolation simultaneously, promotes whole DC-to-AC converter device's security performance.

3. The utility model discloses a second prevents that ash screen, first prevent that ash screen, first heat dissipation fan and the design of second heat dissipation fan effectively reduce the entering of dust, increase the radiating effect, promote dc-to-ac converter work efficiency and life, increase the security of equipment operation.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a high efficiency inverter converting DC48V to AC 380V;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a front view of the structure of FIG. 2;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 3;

fig. 5 is a schematic view of the internal structure at another viewing angle of the present invention;

FIG. 6 is a front view of the structure of FIG. 5;

in the drawings, the components represented by the respective reference numerals are listed below:

1-shell, 101-DC-DC boosting box, 102-DC-AC inverting box, 103-isolating transforming box, 104-first DC input end, 105-DC output end, 106-DC input end, 107-AC output end, 108-AC input end, 109-first AC output end, 110-second DC input end, 111-second AC output end, 112-heat dissipation hole, 113-first heat dissipation fan, 114-second heat dissipation fan, 115-support column, 116-rain-proof disc, 117-first clamping groove, 118-first dust-proof net, 119-second clamping groove, 120-limiting groove, 121-sliding groove and 122-second dust-proof net.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention relates to a high efficiency inverter converting DC48V to AC380V, which includes a housing 1;

a DC-DC boosting box 101, a DC-AC inversion box 102 and an isolation transformation box 103 are respectively installed on one inner side surface of the shell 1, the DC-DC boosting box 101 can convert 48V direct current into 200V direct current, the DC-AC inversion box 102 can convert the 200V direct current into 100V alternating current, and the isolation transformation box 103 boosts the 100V alternating current to 380V for output and is used for functional power supply of electric equipment; one side surface of the DC-DC boosting box 101 is provided with a first DC input end 104, and the other side surface is provided with a DC output end 105; one side surface of the DC-AC inversion box 102 is provided with a DC input end 106, and the other side surface is provided with an AC output end 107; one side surface of the isolation transformer box 103 is provided with an AC input end 108, and the other side surface is provided with a first AC output end 109;

a second direct current input end 110 and a second alternating current output end 111 are respectively arranged on one outer side surface of the shell 1; the second dc input terminal 110 is located above the second ac output terminal 111; the voltage of 48V is input into the DC-DC boost box 101 through the second DC input terminal 110, and the high voltage ac power of 380V is output for the equipment power supply through the second ac output terminal 111.

As shown in fig. 2, the peripheral side surface of the DC-DC voltage boosting box 101, the peripheral side surface of the DC-AC inversion box 102 and the peripheral side surface of the isolation transformer box 103 are all provided with a plurality of heat dissipation holes 112, so that the heat dissipation effect is increased, and the working safety of the inverter is ensured.

As shown in fig. 5, the first heat dissipation fan 113 and the second heat dissipation fan 114 are respectively installed at the bottom and the top of the housing 1, the first heat dissipation fan 113 is used to bring the air outside the inverter into the inverter, and the second heat dissipation fan 114 brings the air inside the inverter out, so that the flow of the air inside the inverter is increased, the heat dissipation effect is increased, and the working safety of the inverter is improved.

As shown in fig. 1 and 6, a plurality of support columns 115 are mounted on the top of the housing 1; the rain-proof dish 116 of support column 115 top fixedly connected with can effectively avoid the influence of rainwater to the dc-to-ac converter.

As shown in fig. 3 and 4, a plurality of first engaging grooves 117 are formed at the bottom of the housing 1; first draw-in groove 117 inner wall clearance fit has first dustproof net 118, when the first heat dissipation fan 113 of operation, can be convenient for remove dust to the air of inflow, avoids causing the influence to the inside electrical component of dc-to-ac converter, promotes security and life.

As shown in fig. 5, a second engaging groove 119 and a limiting groove 120 are respectively formed on one opposite inner side surface of the housing 1, and a sliding groove 121 is fixedly connected to the other inner side surface; a second ash-proof net 122 is in clearance fit with the inner wall of the second clamping groove 119; the peripheral side surface of the second ash-proof net 122 is in clearance fit with the inner wall of the sliding groove 121, and one side surface of the second ash-proof net 122 penetrates through the limiting groove 120, so that the dust removal effect is achieved, and the second ash-proof net is convenient to detach and replace.

As shown in fig. 1 and fig. 2, the second dc input terminal 110 and the first dc input terminal 104 are connected by a cable, and the input voltage is 48V; the second alternating current output end 111 and the first alternating current output end 109 are connected through a cable, and the output voltage is 380V.

As shown in fig. 6, the DC-DC boost box 101 includes a plurality of silicon carbide diodes and silicon carbide MOS transistors connected in parallel, and thus can meet the current requirement, the very low reverse recovery time of the silicon carbide diodes and the low on-resistance of the silicon carbide MOS transistors can achieve high efficiency, and the efficiency can reach more than 98% when the silicon carbide diodes are input at 48V and output at 200V and output at 6kW in an actual test.

Wherein, as shown in fig. 3, the DC output terminal 105 and the DC input terminal 106 are both 200V; the output voltage of the AC output end 107 and the input voltage of the AC input end 108 are both 100V; the DC output 105 is connected to the DC input 106 by a cable, and the AC output 107 is connected to the AC input 108 by a cable.

The working principle of the embodiment is as follows: firstly, 48V direct current is input through a second direct current input end 110, the 48V direct current is input into a DC-DC boosting box 101 through a first direct current input end 104, conversion from the 48V direct current to 200V direct current is realized through a plurality of silicon carbide diodes and silicon carbide MOS tubes which are connected in parallel, higher efficiency can be obtained due to extremely low reverse recovery time of the silicon carbide diodes and lower conduction resistance of the silicon carbide MOS tubes, and the efficiency can reach more than 98% when the 48V direct current is input into 200V and output into 6kW in practical tests; then, 200V direct current is transmitted to a DC input end 106 on a DC-AC inversion box 102 through a cable at a DC output end 105, the conversion from the direct current to alternating current is realized in the DC-AC inversion box 102 in a full-bridge inversion mode, high-quality IGBTs are used as switching devices, the direct current voltage 200VDC is inverted into three-phase sinusoidal alternating current 100VAC in an SPWM modulation mode, output sinusoidal waveforms are optimized through algorithms such as repetitive control, and the measured efficiency can reach 95%; finally, an AC input end 108 on the isolation transformation box 103 receives 100VAC of the AC output end 107, the 100VAC is boosted to 380VAC through an isolation boosting transformer inside the isolation transformation box 103, meanwhile, the effect of safety isolation is achieved, the efficiency of the isolation boosting transformer reaches 98% by reducing copper loss and iron loss of the transformer and optimizing manufacturing processes, 380V alternating current is output to external electric equipment through a second alternating current output end 111, theoretically, the overall efficiency of the inverter device is calculated to be 98% 95% 98% 91.24%, actual tests show that the total efficiency of the device can reach 91.05% when the 48VDC is input to 380 kW and output 6kW, and the efficiency is higher than that of existing products by a few means.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high efficiency inverter from DC48V to AC380V, comprising a housing (1); the method is characterized in that:

a DC-DC boosting box (101), a DC-AC inverting box (102) and an isolating transformation box (103) are respectively arranged on one inner side surface of the shell (1); one side surface of the DC-DC boosting box (101) is provided with a first direct current input end (104), and the other side surface is provided with a DC output end (105); one side surface of the DC-AC inversion box (102) is provided with a DC input end (106), and the other side surface is provided with an AC output end (107); an AC input end (108) is installed on one side surface of the isolation transformer box (103), and a first AC output end (109) is installed on the other side surface of the isolation transformer box;

a second direct current input end (110) and a second alternating current output end (111) are respectively arranged on one outer side surface of the shell (1); the second direct current input end (110) is positioned above the second alternating current output end (111).

2. The high-efficiency inverter converting DC48V to AC380V as claimed in claim 1, wherein the peripheral side of the DC-DC voltage boosting box (101), the peripheral side of the DC-AC inversion box (102) and the peripheral side of the isolation transformation box (103) are all provided with a plurality of heat dissipation holes (112).

3. The high efficiency inverter of claim 1, wherein the first heat dissipating fan (113) and the second heat dissipating fan (114) are installed at the bottom and the top of the housing (1) respectively from DC48V to AC 380V.

4. A high efficiency inverter from DC48V to AC380V as claimed in claim 1 wherein, a number of support posts (115) are mounted on top of the housing (1); the top of the supporting column (115) is fixedly connected with a rainproof disc (116).

5. The high-efficiency inverter converting DC48V to AC380V as claimed in claim 1, wherein the housing (1) has a number of first slots (117) formed in the bottom thereof; and a first ash-proof net (118) is in clearance fit with the inner wall of the first clamping groove (117).

6. The high-efficiency inverter converting DC48V to AC380V as claimed in claim 1, wherein a second slot (119) and a limiting slot (120) are respectively formed on one opposite inner side of the housing (1), and a sliding slot (121) is fixedly connected to the other inner side; a second ash-proof net (122) is in clearance fit with the inner wall of the second clamping groove (119); the circumferential side surface of the second ash-proof net (122) is in clearance fit with the inner wall of the sliding groove (121), and one side surface of the second ash-proof net (122) penetrates through the limiting groove (120).

7. A high efficiency inverter from DC48V to AC380V as claimed in claim 1 wherein said second DC input (110) and said first DC input (104) are connected by cable and have an input voltage of 48V; the second alternating current output end (111) is connected with the first alternating current output end (109) through a cable, and the output voltage is 380V.

8. A high efficiency inverter from DC48V to AC380V as claimed in claim 1 wherein said DC-DC boost box (101) contains multiple silicon carbide diodes and silicon carbide MOS transistors connected in parallel inside.

9. A high efficiency inverter from DC48V to AC380V as claimed in claim 1 wherein the DC output (105) and DC input (106) are both 200V; the output voltage of the AC output end (107) and the input voltage of the AC input end (108) are both 100V.