阅读说明：本技术 功率单元装置 (Power cell arrangement ) 是由 罗仁俊 王婷 周晓云 孙保涛 段焱辉 刘斐 陈志新 任涛 黄欢 邹华民 于 2019-09-03 设计创作，主要内容包括：本发明涉及一种功率单元装置,属于电气设备领域,包括绝缘的壳体,所述壳体内设置有中隔板,所述中隔板上固定有控制电路板和供电电路板；设置在所述壳体内的两个功率单元,两个所述功率单元分别设置在壳体内的上部空间和壳体内的下部空间；其中,两个所述功率单元独立运行,并且均连接所述控制电路板和供电电路板。本发明能够将两个独立的功率单元设置在同一个壳体内,提高设备整机功率密度,并采取系列化、共用化的方式以及更换新材料的方式降低成本。(The invention relates to a power unit device, which belongs to the field of electrical equipment and comprises an insulated shell, wherein a middle partition plate is arranged in the shell, and a control circuit board and a power supply circuit board are fixed on the middle partition plate; the two power units are arranged in the shell and are respectively arranged in the upper space in the shell and the lower space in the shell; wherein the two power units operate independently and are connected with the control circuit board and the power supply circuit board. The invention can arrange two independent power units in the same shell, improve the power density of the whole equipment, and reduce the cost by adopting a serialization and sharing mode and a new material replacement mode.)

1. A power cell apparatus, comprising:

the power supply device comprises an insulating shell, wherein a middle partition plate is arranged in the shell, and a control circuit board and a power supply circuit board are fixed on the middle partition plate;

the two power units are arranged in the shell and are respectively arranged in the upper space in the shell and the lower space in the shell;

the two power units operate independently and are connected with the control circuit board and the power supply circuit board in common.

2. The power cell apparatus of claim 1, wherein the power cell comprises:

the inverter circuit module comprises a plurality of IGBT elements and is used for changing the frequency of the output voltage of the power unit group;

a rectifier bridge for rectifying an input current;

the two internal support capacitors are respectively arranged at the top and the bottom of the shell and used for stabilizing the direct-current voltage of the IGBT element; and

a power resistor for power cell discharge and support capacitor voltage grading.

3. The power unit device according to claim 2, wherein two heat sinks are arranged in the middle of the power unit, and the two heat sinks are symmetrical up and down, and a temperature detection module is arranged on the power unit;

the temperature detection module transmits temperature data in the shell to the control circuit board, and the control circuit board controls the radiator according to the temperature data.

4. The power unit device according to claim 3, wherein the inverter circuit module is provided with a absorption capacitor for reducing the turn-off overvoltage of the power unit.

5. The power cell device of claim 6, wherein a transformer is disposed at the bottom of the power cell for ac energy extraction.

6. The power unit device according to any one of claims 2 to 5, wherein an air inlet is provided on a front panel of the housing at a position aligned with the heat sink, and an air outlet is provided on a rear panel of the housing at a position aligned with the heat sink; and a heat dissipation channel is formed between the air inlet and the air outlet, and the radiator is positioned in the heat dissipation channel.

7. The power unit device according to claim 6, wherein an external hanging device is arranged on the rear plate surface of the shell, and a plurality of external supporting capacitors are arranged on the external hanging device along the vertical direction;

and one side of the external hanging device is provided with an external composite busbar which is connected with the power unit inside the shell through an external common busbar.

8. The power unit device according to claim 6, wherein the side plate surface of the housing is provided with a plurality of weight-reducing grooves; and reinforcing ribs are arranged in the weight reduction grooves.

9. The power cell device of claim 8, wherein the bottom of the housing is provided with a plurality of positioning protrusions.

10. The power unit device according to any one of claims 7 to 9, wherein a support capacitor heat dissipation hole is provided on a front plate surface of the housing at a position corresponding to the internal support capacitor.

Technical Field

The invention relates to a power unit device, and belongs to the field of electrical equipment.

Background

The power unit is a power unit widely applied to frequency converters and current transformers. In the process of continuous development and innovation of frequency converters and converters, the power unit serving as a core component of the frequency converter and the converter is also developed towards the trends of higher power density, lower cost, higher reliability, higher production and maintenance efficiency and the like.

Basically, each frequency converter and each current transformer have a power unit, and the existing power unit has the following defects:

first, the design of the sheet metal casing is adopted to present power unit majority, and is with high costs and heavy, inconvenient installation maintenance, and simultaneously because of power unit internal voltage is higher, need increase insulating design space, is unfavorable for the promotion of power density. Secondly, most of the heat dissipation flow channel designs of the existing power units have the defects of hardness, poor heat dissipation effects on capacitors and the like, and easy accumulation of impurities and dust, which affects the service life of equipment.

Disclosure of Invention

In order to solve the problems, the invention provides a power unit device, which can arrange two independent power units in the same shell, improve the power density of the whole equipment, and reduce the cost by adopting a serialization and sharing mode and a new material replacement mode.

The invention provides a power unit device, comprising:

the power supply device comprises an insulating shell, wherein a middle partition plate is arranged in the shell, and a control circuit board and a power supply circuit board are fixed on the middle partition plate;

the two power units are arranged in the shell and are respectively arranged in the upper space in the shell and the lower space in the shell;

the two power units operate independently and are connected with the control circuit board and the power supply circuit board in common.

A further development of the invention is that the power unit comprises:

the inverter circuit module comprises a plurality of IGBT elements and is used for changing the frequency of the output voltage of the power unit group;

a rectifier bridge for rectifying an input current;

the two internal support capacitors are respectively arranged at the top and the bottom of the shell and used for stabilizing the direct-current voltage of the IGBT element; and

a power resistor for power cell discharge and support capacitor voltage grading.

The invention has the further improvement that two radiators which are symmetrical up and down are arranged in the middle of the power unit, and a temperature detection module is arranged on the power unit;

the temperature detection module transmits temperature data in the shell to the control circuit board, and the control circuit board controls the radiator according to the temperature data.

The inverter circuit module is further improved in that an absorption capacitor is arranged on the inverter circuit module and used for reducing the turn-off overvoltage of the power unit.

The invention is further improved in that a transformer is arranged at the bottom of the power unit and is used for alternating current energy taking.

The invention has the further improvement that an air inlet is arranged at the position of the front panel of the shell, which is aligned with the radiator, and an air outlet is arranged at the position of the rear panel of the shell, which is aligned with the radiator; and a heat dissipation channel is formed between the air inlet and the air outlet, and the radiator is positioned in the heat dissipation channel.

The invention has the further improvement that an external hanging device is arranged on the rear plate surface of the shell, and a plurality of external supporting capacitors are arranged on the external hanging device along the vertical direction;

and one side of the external hanging device is provided with an external composite busbar which is connected with the power unit inside the shell through an external common busbar.

The invention has the further improvement that a plurality of weight-reducing grooves are arranged on the side plate surface of the shell; and reinforcing ribs are arranged in the weight reduction grooves.

The invention is further improved in that a plurality of positioning bulges are arranged at the bottom of the shell.

The invention is further improved in that a supporting capacitor heat dissipation hole is arranged on the front plate surface of the shell corresponding to the position of the internal supporting capacitor.

Compared with the prior art, the invention has the advantages that:

according to the power unit device, the two independent power units are arranged in the same shell, so that the power density of the whole device is improved, and the cost is reduced by adopting a serialization and sharing mode and a new material replacement mode. A middle partition board is arranged in the shell to complete reasonable supporting and layout structure, and a multi-model (power grade) power unit platform with double power units in seriation is formed. The overall power density of the power unit is greatly improved, the weight of the whole machine is reduced, the effect of reducing the cost is obvious, the quality is improved, and the competitiveness of the whole machine equipment is greatly improved.

Drawings

Fig. 1 is a schematic structural view of a power cell apparatus according to an embodiment of the present invention, showing a structure of a front plate surface of a case;

FIG. 2 is a schematic structural view of a power cell apparatus according to an embodiment of the present invention, showing a structure in which a power cell is removed from the inside of a case;

FIG. 3 is a schematic structural view of a power cell apparatus according to an embodiment of the present invention, showing a structure in which a middle partition is removed in a case;

FIG. 4 is a schematic structural diagram of a power cell apparatus according to an embodiment of the present invention, showing the structure of the rear panel surface of the case;

fig. 5 is a schematic structural view of a power cell device according to an embodiment of the present invention, showing the structure of a side plate face of a case.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

The meaning of the reference symbols in the drawings is as follows: 1. the device comprises a shell, 2, a power unit, 3, a middle partition board, 11, an air inlet, 12, an air outlet, 13, an external device, 14, an external supporting capacitor, 15, an external composite busbar, 16, an external common busbar, 17, a weight reduction groove, 18, a reinforcing rib, 19, a supporting capacitor heat dissipation hole, 21, an inverter circuit module, 22, a rectifier bridge, 23, an internal supporting capacitor, 24, a power resistor, 25, a radiator, 26, a temperature detection module, 27, an absorption capacitor, 28, a transformer, 29, a module composite busbar, 31, a control circuit board, 32 and a power supply circuit board.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 schematically shows a power cell arrangement according to an embodiment of the invention. According to the power unit device, two independent power units can be arranged in the same shell, the power density of the whole device is improved, and the cost is reduced by adopting a serialization and sharing mode and a new material replacement mode.

As shown in fig. 1 and 2, the power unit device according to the present embodiment includes an insulating housing 1. Preferably, the housing 1 has a rectangular parallelepiped structure including eight plate surfaces. The eight board surfaces are respectively an upper board surface, a lower board surface, a front board surface, a rear board surface, a left board surface and a right board surface. Preferably, the housing 1 is molded using an SMC molding die. The middle partition plate 3 is arranged inside the shell 1, the middle partition plate 3 is vertically arranged inside the shell 1, and the control circuit board 31 and the power supply circuit board 32 are fixedly arranged on the middle partition plate 3. In fig. 1, a control circuit board 31 is provided at an upper portion of the middle barrier 3, and a power supply circuit board 32 is provided at a lower portion of the middle barrier 3. The power unit group is arranged in the shell 1 and comprises two power units 2 which are symmetrically arranged, a first power unit arranged in the upper space of the shell 1 and a second power unit arranged in the lower space of the shell 1. The first power unit and the second power unit respectively and independently operate and are connected with the control circuit board 31 and the power supply circuit board 32 on the middle partition plate 3, and the first power unit and the second power unit share the control circuit board 31 and the power supply circuit board 32.

In the power unit device according to the present embodiment, the control circuit board 31 and the power supply circuit board 32 can be arranged at appropriate positions by providing the middle partition plate 3 in the housing 1, and the first power unit and the second power unit can operate independently while both connecting the control circuit board 31 and the power supply circuit board 32. In this way, two groups of power cells can be controlled simultaneously by the control circuit board 31 and can be powered by one group of power supply circuit board 32.

The existing power units basically adopt a single power unit mode, each power unit uses a set of power supply system, control system and structural support, and each frequency converter or current transformer generally uses ten to one hundred power units with different quantities. In the power unit device described in this embodiment, a power supply system and a control system and a structural support member that can be shared are provided between the power units, and these sharable parts are cost and space that can be saved.

In one embodiment, as shown in fig. 3, the power unit 2 includes an inverter circuit module 21, and the inverter circuit module 21 includes several IGBT elements for changing the frequency of the output voltage of the power unit group. The power unit 2 in this embodiment further comprises a rectifier bridge 22, said rectifier bridge 22 being adapted to rectify the input current. In the present embodiment, the power unit 2 further includes two internal support capacitors 23, the two internal support capacitors 23 are respectively disposed at the top and the bottom of the housing 1, and the internal support capacitors 23 are used for stabilizing the IGBT element dc voltage. The power cell 2 in this embodiment further comprises a power resistor 24, said power resistor 24 being used for power cell discharge and for supporting a uniform capacitance.

In one embodiment, two heat sinks 25 are disposed in the middle of the power unit 2, and the two heat sinks 25 are disposed in the middle of the power unit 2 in an up-and-down symmetrical manner. The power unit 2 is provided with a temperature detection module 26, and the temperature detection module 26 can detect the temperature of the power unit. In operation, the temperature detection module 26 transmits temperature data in the housing 1 to the control circuit board 31, and the control circuit board 31 controls the heat sink 25 according to the temperature data.

In the process of using the power unit device according to the present embodiment, when the temperature detection unit detects that the temperature of the power unit 2 is too high, the control circuit board 31 controls to start the operation of the heat sink 25, and the heat dissipation of the power unit 2 is performed through the heat sink 25. Thereby reducing the temperature of the power unit 2 and avoiding damage caused by overheating of the power unit.

In one embodiment, the inverter circuit module 21 is provided with a absorption capacitor 27 for reducing the turn-off overvoltage of the power unit. Preferably, a transformer 28 is provided at the bottom of the power unit for ac power extraction. When the power module needs alternating current energy taking, the alternating current energy taking is carried out through the transformer 28; when dc power extraction is required, dc power extraction is performed through the internal support capacitor 23.

In one embodiment, as shown in fig. 1 and 4, the front panel of the housing 1 is provided with an air inlet 11, and the position of the air inlet 11 is aligned with the position of the heat sink 25. The number of the air inlets 11 is two, and the two air inlets correspond to the positions of the two radiators 25 respectively. An air outlet is arranged on the rear panel of the shell 1, and the position of the air outlet is aligned with the position of the radiator 25. The number of the air outlets is also two, and the two air outlets are respectively correspondingly arranged at the position of the radiator 25. In the present embodiment, a heat dissipation channel is formed between the air inlet 11 and the air outlet, and the heat sink 25 is located in the heat dissipation channel.

In one embodiment, as shown in fig. 4, an external hanging device 13 is disposed on a rear panel surface of the housing 1, and a plurality of external supporting capacitors 14 are disposed on the external hanging device 13. An external composite busbar 15 is arranged on one side of the external hanging device 13, and the external composite busbar 15 is connected with a power unit inside the shell 1 through an external common busbar 16. The upper part and the lower part of the power unit are respectively provided with a module composite busbar 29, and the module composite busbar 29 is connected with the external common busbar 16.

In one embodiment, an external hanging device 13 is disposed on the rear panel surface of the housing 1, and the external hanging device 13 is preferably a square frame structure. The plug-in device 13 is provided with a plurality of external supporting capacitors 14, and the external supporting capacitors 14 are arranged in a line along the vertical direction. An external composite busbar 15 is arranged on one side of the external hanging device 13, and the external composite busbar 15 is connected with a power unit inside the shell 1 through an external common busbar 16.

In a preferred embodiment, as shown in fig. 5, the side plate surface of the housing 1 is provided with a plurality of weight-reducing slots 17, and the weight-reducing slots 17 may be arranged in a vertical direction or in a horizontal direction. Reinforcing ribs 18 are arranged in the weight-reducing grooves 17. In the embodiment shown in the figure, three rows of weight-reducing grooves 17 in the vertical direction are arranged on the side plate surface of the shell 1, and reinforcing ribs 18 are vertically arranged in the weight-reducing grooves 17. In this embodiment, the rib 18 has an arcuate or arc-shaped structure, and both ends are respectively connected to the side plate surfaces of the housing 1 by bolts.

In the power unit device according to the present embodiment, the weight of the entire housing 1 can be reduced by providing the weight-reduction groove 17 in the side surface of the housing 1. The strength of the housing 1 can be improved by providing the reinforcing ribs 18. The reinforcing ribs 18 are arranged in the lightening grooves 17, so that the overall weight of the shell 1 is reduced, and the strength of the shell 1 is not reduced.

In a preferred embodiment, the bottom of the housing 1 is provided with a plurality of positioning protrusions. Preferably two raised structures, two recesses are provided at the mounting location, the recesses being adapted to cooperate with the projections. When in the aligned position, the projection and recess are properly aligned and the projection snaps into the recess, thereby completing the positioning of the housing.

In one embodiment, a front surface of the housing 1 is provided with a supporting capacitor heat dissipation hole 19, and a position of the supporting capacitor heat dissipation hole 19 corresponds to a position of the internal supporting capacitor 23. The internal support capacitors 23 are disposed at the top and bottom of the power unit in the housing 1, and the support capacitor heat dissipation holes 19 are correspondingly disposed in two rows, respectively on the upper and lower portions of the front panel of the housing 1. Can dispel the heat for inside support capacitor 23 of casing 1 inside through setting up support capacitor louvre 19, guarantee inside support capacitor 23's safety.

Most of heat dissipation flow channel designs of the existing power units have the defects of hardness, for example, capacitors are placed at the air inlets 11 of the heat radiators 25, although the heat dissipation of the capacitors is guaranteed, the air inlet amount of the heat radiators 25 is also influenced, meanwhile, the quantitative heat dissipation simulation design is difficult, or the whole power unit only considers the air amount of the heat radiators 25, and the fact that other components such as the capacitors and circuit boards and the like naturally dissipate heat in an open mode after the heat dissipation of power devices is guaranteed, but the mode is easy to accumulate impurities such as dust and the like on the circuit boards and the components, influences the insulation and the service life of the power units, the efficiency of the natural heat dissipation is low, and the reliability is low under the conditions of power overload or high ambient temperature. When the power unit device according to the present embodiment is used, the heat dissipation channel is not occupied by the supporting capacitor heat dissipation holes 19, and the internal supporting capacitor 23 can be effectively dissipated, so that the above problems are solved.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.