CN221058183U

CN221058183U - Power supply converter

Info

Publication number: CN221058183U
Application number: CN202322522660.3U
Authority: CN
Inventors: 张保仓; 赵慧; 刘念祥; 王杰
Original assignee: Beijing Hengyuan New Power Technology Co ltd
Current assignee: Beijing Hengyuan New Power Technology Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-31
Anticipated expiration: 2033-09-15

Abstract

The application relates to a power converter comprising: the box body, the direct current part and the alternating current part; the direct current part and the alternating current part are both positioned in the box body; the direct current part comprises a first rectifier bridge and an LLC phase-shifting full-bridge circuit; the input end of the first rectifier bridge is suitable for being electrically connected with an alternating current power supply, the output end of the first rectifier bridge is electrically connected with the input end of the LLC phase-shifting full-bridge circuit, and the output end of the LLC phase-shifting full-bridge circuit is suitable for being electrically connected with a direct current power utilization load; the alternating current part comprises a second rectifier bridge and an inverter, the input end of the second rectifier bridge is suitable for being electrically connected with an alternating current power supply, the output end of the second rectifier bridge is electrically connected with the input end of the inverter, and the output end of the inverter is suitable for being electrically connected with an alternating current power utilization load. Compared with the existing power converter, the application can only provide direct current power supply, and can provide direct current and alternating current power supply for electric facilities at the same time.

Description

Power supply converter

Technical Field

The application relates to the technical field of power tools, in particular to a power converter.

Background

Some large electric facilities, such as vehicles, unmanned aerial vehicles, etc., have electric loads inside that include both electronic components that require ac power and electronic components that require dc power. However, the existing power converters, also called power managers, can only perform dc power supply, and cannot meet the power demand of power facilities, for example, patent document CN202651878U.

Therefore, how to make the power converter provide dc and ac power for the power utility at the same time is a problem to be solved by those skilled in the art.

Disclosure of utility model

In order to enable a power converter to provide direct current and alternating current power for electricity utilization facilities at the same time, the application provides the power converter.

In order to achieve the object of the present utility model, there is provided a power converter comprising:

The box body, the direct current part and the alternating current part;

the direct current part and the alternating current part are both positioned in the box body;

The direct current part comprises a first rectifier bridge and an LLC phase-shifting full-bridge circuit; the input end of the first rectifier bridge is suitable for being electrically connected with an alternating current power supply, the output end of the first rectifier bridge is electrically connected with the input end of the LLC phase-shifting full-bridge circuit, and the output end of the LLC phase-shifting full-bridge circuit is suitable for being electrically connected with a direct current power utilization load;

The alternating current part comprises a second rectifier bridge and an inverter, wherein the input end of the second rectifier bridge is suitable for being electrically connected with an alternating current power supply, the output end of the second rectifier bridge is electrically connected with the input end of the inverter, and the output end of the inverter is suitable for being electrically connected with an alternating current power utilization load.

In one possible implementation manner, the direct current part and the alternating current part further comprise detection units, the detection units of the direct current part are electrically connected with the output end of the LLC phase-shifting full-bridge circuit, the input end of the detection unit of the alternating current part is electrically connected with the output end of the inverter, and the output end of the detection unit is suitable for being electrically connected with a CAN bus of an electric facility for communication.

In one possible implementation, the detection unit includes a current sensor, the current sensor input of the dc portion is electrically connected to the output of the LLC phase-shifting full-bridge circuit, and the current sensor input of the ac portion is electrically connected to the output of the inverter.

In one possible implementation manner, the detection unit includes a voltage acquisition board, an input end of the voltage acquisition board of the direct current part is electrically connected with an output end of the LLC phase-shifting full-bridge circuit, and an input end of the voltage acquisition board of the alternating current part is electrically connected with an output end of the inverter.

In one possible implementation manner, the direct current part further comprises a first main control board and a first driving board;

the output end of the first main control board is electrically connected with the input end of the first driving board, and the output end of the first driving board is electrically connected with the control end of the LLC phase-shifting full-bridge circuit.

In one possible implementation, the ac part further includes a capacitor;

The output end of the second rectifier bridge is electrically connected with the input end of the inverter through the capacitor.

In one possible implementation manner, the alternating current part further comprises a second main control board and a second driving board;

The second main control board is electrically connected with the control end of the inverter through the second driving board.

In one possible implementation manner, a separation plate is arranged inside the box body, and the direct current part and the alternating current part are respectively arranged at two sides of the separation plate.

In one possible implementation manner, the box body is further provided with a heat dissipation device, and the heat dissipation device is arranged close to the direct current part and the alternating current part.

In one possible implementation manner, the heat dissipating device is an exhaust fan, the side wall of the box body is provided with a heat dissipating hole and a mounting hole, the exhaust fan is mounted on the box body through the mounting hole, and two sides of the exhaust fan face the inside and the outside of the box body respectively.

The application provides direct current power supply for electricity utilization facilities by arranging the direct current part; the alternating current part is arranged to supply alternating current power for the electricity utilization facilities. In the dc section, the first rectifier bridge rectifies an ac power source, for example, three-phase ac power, into dc power, and the voltage required by a dc load for vehicles and unmanned aerial vehicles is generally low. In the alternating current part, the power supply of the alternating current power supply is rectified through the second direct current bridge, and then the power supply is converted into alternating current again through the inverter, so that the voltage and the frequency of the power supply of the alternating current power supply are regulated, and the requirements of an alternating current power load are met. Compared with the existing power converter, the application can only provide direct current power supply, and can provide direct current and alternating current power supply for electric facilities at the same time.

Drawings

FIG. 1 shows an exploded view of a power converter of an embodiment of the present application;

FIG. 2 illustrates a side view of a power converter of an embodiment of the application;

FIG. 3 illustrates a front view of a power converter of an embodiment of the application;

FIG. 4 illustrates a bottom view of a power converter of an embodiment of the application;

Fig. 5 shows a schematic diagram of the dc section according to an embodiment of the present application;

fig. 6 shows a schematic diagram of an ac section according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the application will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood, however, that the terms "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model or simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present application.

FIG. 1 illustrates an exploded view of a power converter according to an embodiment of the application; FIG. 2 illustrates a side view of a power converter according to an embodiment of the application; FIG. 3 illustrates a front view of a power converter according to an embodiment of the application; FIG. 4 illustrates a bottom view of a power converter according to an embodiment of the application; fig. 5 shows a schematic diagram of a dc section according to an embodiment of the application; fig. 6 shows a schematic diagram of an ac section according to an embodiment of the present application.

As shown in fig. 1, the power converter includes a case, a dc part, and an ac part; the direct current part and the alternating current part are both positioned in the box body; the direct current part comprises a first rectifier bridge 210 and a power module; the power supply module is an LLC phase-shifting full-bridge circuit 220, the input end of the first rectifier bridge 210 is suitable for being electrically connected with an alternating current power supply, the output end of the first rectifier bridge 210 is electrically connected with the input end of the LLC phase-shifting full-bridge circuit 220, and the output end of the LLC phase-shifting full-bridge circuit 220 is suitable for being electrically connected with a direct current power utilization load; the ac part includes a second rectifier bridge 310 and an inverter 320, where an input end of the second rectifier bridge 310 is adapted to be electrically connected to an ac power source, an output end of the second rectifier bridge 310 is electrically connected to an input end of the inverter 320, and an output end of the inverter 320 is adapted to be electrically connected to an ac power load.

The application provides direct current power supply for electricity utilization facilities by arranging the direct current part; the alternating current part is arranged to supply alternating current power for the electricity utilization facilities. In the dc section, the first rectifier bridge 210 rectifies an ac power source, for example, three-phase ac power, into dc power, and the voltage required for a dc load for a vehicle or an unmanned aerial vehicle is generally low, and the LLC phase-shifting full-bridge circuit 220 is provided to perform phase-shifting full-bridge voltage reduction and output to the dc power load to supply power thereto. In the ac part, the second dc bridge is set to rectify the power supplied by the ac power source, and then the rectified power is converted into ac power again through the inverter 320, so that the voltage and frequency of the power supplied by the ac power source are regulated to meet the requirements of the ac power load. Compared with the existing power converter, the application can only provide direct current power supply, and can provide direct current and alternating current power supply for electric facilities at the same time.

In one possible implementation, as shown in fig. 1, a spacer 130 is also included; the box body comprises an upper box body 110 and a lower box body 120, wherein the upper box body 110 and the lower box body 120 are respectively provided with an inner cavity with one end open, the upper box body 110 is matched with the lower box body 120, the box body, the upper box body 110 and the lower box body 120 are integrally rectangular, the open end of the upper box body 110 is detachably connected with the open end of the lower box body 120, and the isolation plate 130 is matched with the open end of the upper box body 110 and the open end of the lower box body 120. The installer installs the ac part in the internal cavity of the lower case 120, then places the isolation plate 130 over the ac part, installs the dc part on the isolation plate 130, then sets the open end of the upper case 110 toward the open ends of the isolation plate 130 and the lower case 120, connects the upper case 110 with the lower case 120, and completes the installation at this time.

Further, the isolation plate 130 is detachably connected to the open end of the lower case 120, the dc part is fixed to the inner sidewall of the upper case 110, and the ac part is fixed to the inner sidewall of the lower case 120.

In one possible implementation, the open end of the upper case 110 is snapped onto the open end of the lower case 120.

In one possible implementation, as shown in fig. 1, the dc portion and the ac portion each further include a detection unit, where the detection unit of the dc portion is electrically connected to an output of the LLC phase shifting full bridge circuit 220, and the detection unit of the ac portion has an input electrically connected to an output of the inverter 320, and the output of the detection unit is adapted to be electrically connected to a CAN bus of an electrical utility for communication.

The application provides direct current power supply for electricity utilization facilities by arranging the direct current part; the alternating current part is arranged to supply alternating current power for the electricity utilization facilities. The power supply state of the power converter is detected by providing detection units at the output ports of the dc section and the ac section. The detection unit, such as a current sensor, a voltage acquisition board and a leakage detector, is electrically connected with the CAN bus of the electricity utilization facility to communicate, and the detection result is displayed to the staff by the communication module of the electricity utilization facility, so that the staff CAN judge the power supply state of the power supply converter, and the staff CAN conveniently and rapidly check the electricity utilization fault.

In a possible implementation manner, the dc part further includes a capacitor 230, the output end of the first rectifying bridge 210 is electrically connected to the input end of the capacitor 230 of the dc part, and the output end of the capacitor 230 of the dc part is electrically connected to the input end of the LLC phase shifting full bridge circuit 220.

In one possible implementation, as shown in fig. 1, the dc part further includes a first busbar 260, the ac part further includes a second busbar 390, and the output terminal of the llc phase-shifting full-bridge circuit 220 is electrically connected to the input terminal of the first busbar 260, and the output terminal of the first busbar 260 is adapted to be electrically connected to a dc electrical load; the output end of the inverter 320 is electrically connected to the input end of the second busbar 390, and the output end of the second busbar 390 is adapted to be electrically connected to an ac power load. The detection unit of the dc portion is electrically connected to the first busbar 260, and the detection unit input of the ac portion is electrically connected to the second busbar 390. According to the application, the detection unit is arranged, and is used for detecting the power supply state of the busbar and transmitting the power supply state to the CAN line of the power utilization facility for the staff to check.

In one possible implementation, as shown in fig. 1, the detection unit includes a current sensor, the input of the current sensor 240 of the dc section is electrically connected to the output of the LLC phase shifting full bridge circuit 220, the input of the current sensor 330 of the ac section is electrically connected to the output of the inverter 320, and the output of the current sensor is adapted to be electrically connected to the CAN bus of the electrical utility for communication. The specific current values of direct current and alternating current power supply are detected by the current sensor, so that the working state of the power converter is convenient to monitor.

In one possible implementation, the detection unit of the alternating current part comprises a current transformer, and the current transformer does not need an external power supply, so that the energy is saved and the environment is protected. The application is convenient for monitoring the working state of the power converter by arranging the current transformer to detect the specific current value of the alternating current power supply.

In one possible implementation, as shown in fig. 1, the detection unit includes a voltage acquisition board, an input end of the voltage acquisition board 250 of the dc part is electrically connected to an output end of the LLC phase shifting full bridge circuit 220, an input end of the voltage acquisition board 340 of the ac part is electrically connected to an output end of the inverter 320, and an output end of the voltage acquisition board is adapted to be electrically connected to a CAN bus of an electrical utility for communication. The voltage acquisition board is arranged to detect specific voltage values of direct current and alternating current power supply, so that the working state of the power converter is convenient to monitor.

In one possible implementation, as shown in fig. 1, the dc part further includes a first main control board 270 and a first driving board 280; the output end of the first main control board 270 is electrically connected to the input end of the first driving board 280, and the output end of the first driving board 280 is electrically connected to the control end of the LLC phase shifting full bridge circuit 220. The master control board issues a control adjustment instruction, the drive board is converted into a drive signal, and the LLC phase-shifting full-bridge circuit 220 adjusts the output current voltage according to the drive signal.

In one possible implementation, as shown in fig. 1, the ac part further includes a capacitor 350; the capacitor 350 is fixed on the inner side wall of the box body through a bolt, the capacitor 350 is a direct current support capacitor, the output end of the second rectifier bridge 310 is electrically connected with the input end of the capacitor 350, and the output end of the capacitor 350 is electrically connected with the input end of the inverter 320. The rectified direct current is filtered through the capacitor 350, so that the subsequent inversion processing is facilitated. Further, the ac part further includes a filter inductor, the output end of the capacitor is electrically connected to the input end of the inverter 320 through the filter inductor, and the capacitor and the filter inductor perform filtering together.

In one possible implementation, as shown in fig. 6, the ac part further includes an IGBT, which is a power device used in the inverter 320, and the IGBT of the second driving board 380 cooperates with the inverter 320 to perform the function of converting dc power into ac power. The output of the capacitor 350 is electrically connected to the input of the IGBT, the output of the IGBT is electrically connected to the inverter 320, i.e. the capacitor 350 is electrically connected to the inverter 320 through the IGBT.

In one possible implementation, as shown in fig. 1, the ac part further includes a second main control board 370 and a second driving board 380; the second main control board 370 is electrically connected with the control terminal of the inverter 320 through the second driving board 380. The main control board issues a control adjustment command, the driving board is converted into a driving signal, and the inverter 320 adjusts the output current voltage according to the driving signal.

Further, the second main control board 370 is provided with a DSP chip, the second driving board 380 is provided with an IGBT, which is a power device used in the inverter 320, and the IGBT of the second driving board 380 cooperates with the inverter 320 to perform the function of converting dc power into ac power. The ac part further includes a capacitor 350, an inductor 360, a second busbar 390, and a detection unit, where an output end of the capacitor 350 is electrically connected to an input end of the IGBT, and an output end of the IGBT is electrically connected to the inverter 320, that is, the capacitor 350 is electrically connected to the inverter 320 through the IGBT of the second driving board 380. The output of the inverter 320 is electrically connected to the input of the inductor 360, and the output of the inductor 360 is electrically connected to the second busbar 390. The output voltage of the second driving board 380 passes through the inductor 360 and then passes through the second main control board 370 to stabilize and control the voltage of the output voltage 380VAC power 12 KW. The input end of the detection unit is electrically connected with the second busbar 390, the output end of the detection unit is electrically connected with the DSP chip of the second main control board 370, and the output end of the DSP chip is electrically connected with the CAN bus of the electricity utilization facility.

In one possible implementation, the first main control board 270 and the second main control board 370 are both provided with switch indication lamps, and the switch indication lamps are both located on the outer side wall of the box body. The application displays whether the main control board is working or not through setting the switch indicator lamp.

In one possible implementation, the first master control board 270 is electrically connected to the LLC phase shifting full bridge circuit 220 using twisted pair wires; the second main control board 370 is electrically connected to the inverter 320 by twisted pair wires.

In one possible implementation, the first main control board 270 includes a detection processing circuit, a control circuit, and a DSP chip. The output end of the detection unit is electrically connected with a corresponding detection processing circuit, the output end of the detection processing circuit is electrically connected with the input end of the DSP chip, the output end of the DSP chip is respectively electrically connected with a control circuit and a direct current power utilization load, and the output end of the control circuit is electrically connected with the input end of the first driving plate 280. The second master board 370 and the first master board 270 and so on.

Further, the number of the detection processing circuits is more than two, and the detection processing circuits comprise a voltage signal processing circuit, a current signal processing circuit, a bus voltage processing circuit, a temperature signal processing circuit, a debugging interface processing circuit and the like, and shielding plates are arranged between the more than two detection processing circuits for isolation. The first main control board 270 is powered by an isolated power supply with the detection processing circuit.

In a possible implementation manner, the DSP chip of the first main control board 270 is electrically connected with the CAN bus of the electrical facility through an aviation plug connector, and is used for receiving the output signal of the LLC phase-shifting full-bridge circuit 220, processing the signal of the LLC phase-shifting full-bridge circuit 220, outputting a voltage of 28VDC and a voltage of 8KW, and realizing conversion from three-phase ac to low-voltage dc.

In one possible implementation, LLC phase-shifting full-bridge circuit 220 is used primarily for voltage conversion, DSP processor and analog load powering. The LLC includes four power electronic switches forming a full bridge on the isolation transformer, while diode rectifiers or MOSFET switches are used for synchronous rectification on the secondary side, so that all switching devices can be switched with ZVS, which can be implemented on one leg of the full bridge over the entire load range by varying the dead time for the primary side switch depending on the load situation, while zero voltage or low voltage or valley switching is implemented for the switch on the other leg of the full bridge. This topology requires signal rectification on the secondary side, synchronous rectification is performed without diode rectification for systems with low voltage output voltages or high output current ratings, loss due to diode rectification is avoided, current double synchronous rectification is performed with different switching mechanisms on the secondary side, achieving optimal performance under varying load conditions.

In one possible implementation, inverter 320 includes an inverter bridge, logic control, and filtering circuitry. The output end of the second rectifier bridge 310 is electrically connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the inverter bridge, and the output end of the inverter bridge is suitable for being electrically connected with an alternating current power utilization load; the input end of the logic control circuit is electrically connected with the output end of the second driving board 380, and the output end of the logic control circuit is electrically connected with the control end of the inverter bridge. Further, the inverter bridge includes two paths of four MOSFET tubes, and the DSP chip of the second main control board 370 is electrically connected to the two paths of four MOSFET tubes of the inverter bridge through the second driving board 380, so as to perform switching control on and off of the MOSFET tubes.

In one possible implementation manner, the whole box body is of a cuboid structure, the box body is provided with an internal cavity with one end open, the open end of the box body is provided with an upper cover, the upper cover is matched with the open end of the box body, and the upper cover is detachably connected with the open end of the box body.

In one possible implementation, the upper cover is rotatably connected to the open end of the case. Further, the upper cover is hinged with the box body.

In one possible implementation, the inside of the case is provided with a separation plate 130, and the dc part and the ac part are respectively disposed at two sides of the separation plate 130, and the dc part and the ac part are disposed near opposite ends of the case. The inside of the box body is partitioned by the partition plate 130, and the direct current part and the alternating current part are partitioned, so that the positioning of the staff is facilitated for investigation and maintenance. Further, the isolation plate 130 is a shielding plate, which can shield electromagnetic interference and reduce mutual interference between the dc part and the ac part.

In one possible implementation, the surfaces of the first driving plate 280 and the second driving plate 380 are coated with silicone grease, which may be used to enhance the heat dissipation capability of the driving plates. The first driving plate 280 and the second driving plate 380 are mounted to the inner sidewall of the case by bolts.

In one possible implementation, as shown in fig. 1, the isolation plate 130 is matched with the internal cavity of the box body, the isolation plate 130 is arranged in parallel with the open end of the box body, the ac part is installed at the end, away from the opening, of the box body, then the isolation plate 130 is detachably connected to the inner side wall of the box body, and the dc part is installed at the end, facing the opening, of the box body. At this time, the dc part and the ac part are located at the upper and lower sides of the separation plate 130, respectively. The worker removes the upper cover, inspects the direct current part, removes the partition plate 130, and overhauls the alternating current part. The upper and lower boxes 120 are independently arranged in the box body, and two circuits with different voltages and different powers can be simultaneously output, and the circuits are not interfered with each other during operation. Further, the partition 130 is connected to the case by bolts.

In one possible implementation, the detection unit includes a temperature sensor, and it should be noted that the connection position of the temperature sensor is not specifically limited in the present application, so long as the detection unit is located inside the box.

In one possible implementation, the first rectifier bridge 210 and the LLC phase-shifted full-bridge circuit 220 are disposed adjacent to each other, and the temperature sensor of the dc section is disposed proximate to the first rectifier bridge 210 and the LLC phase-shifted full-bridge circuit 220. The temperature sensor of the ac part is provided near the inverter 320.

In one possible implementation, the case is further provided with a heat dissipating device, which is disposed close to the dc part and the ac part. The electronic component is more and easy to generate heat, the service life of the electronic component can be shortened due to overheating, and unnecessary power supply faults can be caused, and the heat dissipation device is arranged to dissipate heat for the electronic component.

In one possible implementation, as shown in fig. 1 and 4, the heat dissipating device is an exhaust fan 150; the box body side wall is provided with a heat radiation hole 140 and a mounting hole, the exhaust fan 150 is mounted on the box body through the mounting hole, and two sides of the exhaust fan 150 face the inside and the outside of the box body respectively.

In one possible implementation manner, as shown in fig. 1, the dc portion and the ac portion are respectively disposed at opposite ends of the box body, as shown in fig. 1 and fig. 4, fig. 4 is a bottom view of the same embodiment of fig. 1 of the present application, two exhaust fans 150 are provided, two mounting holes are formed on opposite sides of the box body, two exhaust fans 150 are respectively fixed at opposite ends of the box body, and two exhaust fans 150 are respectively disposed near the dc portion and the ac portion.

In one possible implementation, as shown in FIG. 1, the exhaust fan 150 includes a fan body; the fan body comprises a connecting part and a rotating part; the connecting part is of a frame-type structure and is fixed on the box body through the mounting hole; the rotating part comprises a base, a motor, a rotating shaft and more than two fan blades distributed around the circumference of the rotating shaft. The fan blade is connected with the rotation axis, and rotation axis and base rotatable coupling, base and connecting portion fixed connection. The motor drives the rotation shaft to rotate, and the rotation shaft drives the fan blades to rotate, so that air circulation in the box body is quickened, and heat dissipation is carried out. The hot air in the case is circulated to the outside of the case through the heat radiation holes 140 to perform heat exchange.

In one possible implementation manner, as shown in fig. 1, the exhaust fan 150 further includes a protection cover, the protection cover is connected with the box body through a mounting hole, the protection cover is provided with more than two exhaust ports in a penetrating manner, the protection cover covers a side surface of the fan main body, which faces the outer side of the box body, and the fan blades of the rotating part are rotatable in the protection cover. The application ensures the operation safety by arranging the protective cover and can also prevent foreign matters from being blocked into the fan blades.

In one possible implementation manner, the side wall of the box body is provided with a heat dissipation part, the heat dissipation part is penetrated and provided with more than two long strip-shaped heat dissipation holes 140, the body length directions of the more than two long strip-shaped heat dissipation holes 140 are consistent, the mounting hole is positioned in the middle of the heat dissipation part, hot air in the box body exchanges with the outer side of the box body through the heat dissipation holes 140, and the exhaust fan 150 rotates to promote rapid ventilation of air near the heat dissipation holes 140.

Further, the heat dissipation portion is located on a side wall of the box body facing away from the opening, and the heat dissipation hole 140 extends to two adjacent side walls of the box body along the length direction of the heat dissipation portion. The electronic devices are arranged at the bottom of the box body, and convection is formed at the bottom of the box body to promote ventilation.

In one possible implementation manner, as shown in fig. 1 to 3, the box body is integrally rectangular, four brackets are arranged on the outer side wall of the box body, and the four brackets are respectively fixed at four edges of the rectangular structure of the box body, which are oppositely arranged. The whole right triangle that is of support, the right angle of support are close to the summit setting of box body cuboid structure. The application provides the support stability of the box body by arranging the bracket.

In one possible implementation manner, the second rectifier bridge 310 of the alternating current part and the second main control board 370 are adjacently arranged, so that the wire length is reduced, the line is clear, and the maintenance is convenient; a shielding plate is arranged between the second rectifier bridge 310 and the second main control board 370 to prevent electromagnetic interference.

In one possible implementation, a sleeper is also included; the sleepers can be selectively arranged between the components of the direct current part and the alternating current part, so that the inside structure of the box body is compact, the box body is free from sliding and dislocation, a certain damping effect is achieved, and a certain protection effect is achieved on the components.

In one possible implementation, as shown in fig. 2 and fig. 3, the components inside the box body are electrically connected to the external elements through aviation sockets, for example, the input end of the first rectifier bridge 210, the input end of the second rectifier bridge 310, the output end of the LLC phase shifting full bridge circuit 220, the output end of the inverter 320, the output end of the DSP chip of the first main control board 270, and the output end of the DSP chip of the second main control board 370 are respectively connected to specific aviation sockets, where the aviation sockets are more than two, and the more than two aviation sockets are located on the same outer side wall of the box body, and the aviation sockets are standard components, so that the connection is cheap and easy, and the connection is quick and easy to operate.

In one possible implementation manner, as shown in fig. 2 and 3, the outer side wall of the box body is provided with more than two aviation connection plugs 160, and the same side of the box body is provided with a bus aviation connection plug, a three-phase alternating current input circuit aviation connection plug of a direct current part, a 28V direct current output circuit aviation connection plug, a three-phase alternating current input aviation connection plug of an alternating current part, a three-phase alternating current output aviation plug of an alternating current part, a 220V output circuit aviation connection plug and a 28V input circuit aviation plug.

In one possible implementation manner, the aviation socket is connected with the outer side wall of the box body, a sealing part is arranged at the joint of the aviation socket and the outer side wall of the box body, and the sealing part is a waterproof rubber ring and has a certain waterproof effect.

The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A power converter, comprising:

The box body, the direct current part and the alternating current part;

2. The power converter of claim 1, wherein the dc portion and the ac portion each further comprise a detection unit, the detection unit of the dc portion being electrically connected to an output of the LLC phase-shifting full-bridge circuit, the detection unit of the ac portion having an input electrically connected to an output of the inverter, the output of the detection unit being adapted to be electrically connected to a CAN bus of an electrical utility for communication.

3. The power converter according to claim 2, wherein the detection unit includes a current sensor, a current sensor input of the dc section is electrically connected to an output of the LLC phase-shifted full-bridge circuit, and a current sensor input of the ac section is electrically connected to an output of the inverter.

4. The power converter according to claim 2, wherein the detection unit includes a voltage acquisition board, the voltage acquisition board input of the dc section is electrically connected to the output of the LLC phase-shifting full-bridge circuit, and the voltage acquisition board input of the ac section is electrically connected to the output of the inverter.

5. The power converter of claim 1, wherein the dc section further comprises a first main control board and a first drive board;

6. The power converter of claim 1, wherein the ac section further comprises a capacitor;

7. The power converter of claim 1, wherein the ac section further comprises a second main control board and a second drive board;

8. The power converter according to claim 1, wherein a partition plate is provided inside the case, and the dc portion and the ac portion are provided on both sides of the partition plate, respectively.

9. The power converter of claim 1, wherein the case is further provided with a heat sink, the heat sink being disposed adjacent to the dc portion and the ac portion.

10. The power converter of claim 9, wherein the heat dissipating device is an exhaust fan, the side wall of the box body is provided with a heat dissipating hole and a mounting hole, the exhaust fan is mounted on the box body through the mounting hole, and two sides of the exhaust fan face the inside and the outside of the box body respectively.