An airborne high-voltage direct-current converter for a helicopter

Abstract

The utility model relates to the field of helicopter avionics system provides a kind of airborne high-voltage direct-current converter for helicopter. Including box body and the transformer and main circuit board being installed in box body, the box body includes bottom plate, top plate, front panel, back panel and left, right side plate, the DC input terminal block and control socket are equipped on the front panel, the right side plate is close to the DC output socket of back panel position and is equipped;The input filter circuit, output filter circuit, communication circuit and power loop are integrated on the main circuit board, the DC power of the DC input terminal block input is filtered after input filter circuit and input power loop, the high-voltage direct current of power loop output is output by DC output socket after output filter circuit, and the power loop is connected control socket by communication circuit.Adopting the architecture of incorporation into string, there are two transformer roads in interior, after input 28V DC, each road output 135V / 1600W, two roads are connected in series and are 270V / 3200W, to satisfy the use demand of air conditioning system.

Description

Technical Field

[0001] This utility model relates to the field of helicopter avionics systems, specifically to an airborne high-voltage DC converter for helicopters. Background Technology

[0002] Helicopter air conditioning systems typically use the engine shaft to drive the compressor, which limits the compressor's installation location and increases energy consumption. Existing technologies include solutions using onboard DC power to drive the compressor. Onboard DC input is generally 28V, but high-power air conditioning units require 270V DC drive for the compressor, resulting in an input power of 3200W. Therefore, a DC-DC converter is needed to convert the low-voltage DC input to a high-voltage DC output.

[0003] Since helicopters typically operate in an environment with an altitude range of 0-7km and a temperature range of -55℃-70℃, high-power DC-DC converters need to have good heat dissipation capabilities to ensure that the various electrical components inside the housing are not damaged when operating in high-temperature environments. At the same time, because helicopters need to withstand strong vibrations and impacts during flight, it is necessary to fully secure the components inside the housing to improve stability and reliability during use. Summary of the Invention

[0004] To meet the high-voltage DC requirements of helicopter air conditioning systems and ensure stability and reliability during use, this utility model provides an airborne high-voltage DC converter for helicopters.

[0005] The technical solution adopted by this utility model is as follows: A helicopter-borne high-voltage direct current converter includes a housing, a transformer, and a main circuit board installed within the housing. The housing includes a bottom plate, a top plate, a front panel, a rear panel, and left and right side panels. The transformer is fixed to the bottom plate at its four corners with screws. The main circuit board is fixed to the bottom plate via support columns. The main circuit board is located at the center of the housing in the height direction and directly above the transformer. The rear panel has numerous ventilation holes, and a cooling fan is fixedly installed on the inner side of the rear panel. The front panel has corresponding numerous ventilation holes. The cooling fan draws air from the outside of the housing and dissipates heat through the main circuit board and transformer via the rear panel. The front panel has a DC input terminal block and a control socket. The right side panel has a DC output socket near the rear panel. The main circuit board integrates an input filter circuit, an output filter circuit, a communication circuit, and a power circuit. The DC power input to the DC input terminal block is filtered by the input filter circuit and then input to the power circuit. The high-voltage DC output from the power circuit is output from the DC output socket after passing through the output filter circuit. The power circuit is connected to the control socket via the communication circuit.

[0006] Furthermore, the main circuit board integrates two power circuits, with the input segments of the two power circuits connected in parallel and the output terminals of the two power circuits connected in series. The two power circuits are respectively connected to the communication circuit.

[0007] Furthermore, the four corners of the bottom surface of the main circuit board are supported in the box by vertical support columns. The lower end of the support column is fixed to the base plate by screws, and the upper end of the support column is fixed to the main circuit board by screws.

[0008] Furthermore, support blocks are fixedly installed on the left and right side panels by screws, and the main circuit board is supported on the top surface of the support blocks and fixed to the support blocks by screws.

[0009] Furthermore, a transformer bracket is installed on the outside of the transformer. The transformer bracket is a gantry-shaped bent component. The transformer bracket is fitted onto the outside of the transformer, and the bottom of the transformer bracket is fixedly connected to the base plate by screws.

[0010] Furthermore, the outer sides of the left and right side plates are each provided with multiple vertical heat dissipation fins.

[0011] Furthermore, the left and right side plates are each provided with a plurality of mounting bosses, and the mounting bosses are provided with screw holes.

[0012] Furthermore, the input and output filtering is a passive filter circuit composed of inductors and capacitors.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. It adopts a parallel-in, serial-out architecture with two internal transformer circuits. After inputting 28V DC power, each circuit outputs 135V / 1600W. When the two circuits are connected in series, the output is 270V / 3200W, which meets the usage requirements of the air conditioning system.

[0014] 2. The internal components of the box are cooled by a fan blowing directly onto the circuit board. On the outside, fins are machined on the left and right side panels to utilize the cold air from the helicopter's air conditioning unit to dissipate heat from the entire box. This provides good heat dissipation and ensures continuous operation in high-temperature environments.

[0015] 3. The main circuit board is fixedly installed by support columns and support blocks on the side plate, the transformer is fixedly installed by transformer bracket, and the housing is fixedly installed on the helicopter by the mounting boss on the outside, so as to achieve stable installation of the entire converter and ensure stable operation under vibration and shock conditions. Attached Figure Description

[0016] Figure 1 This is an exploded view of the present invention.

[0017] Figure 2 This is the circuit schematic diagram of this utility model.

[0018] In the diagram: Transformer 1, Main circuit board 2, Base plate 3, Top plate 4, Front panel 5, Rear panel 6, Left side panel 7, Right side panel 8, Transformer bracket 9, Support column 10, Support block 11, Mounting boss 12, Cooling fan 13, Heat dissipation fins 14, DC input terminal block 15, Control socket 16, DC output socket 17. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: like Figure 1-2 The aforementioned helicopter airborne high-voltage DC converter consists of a housing, two transformers 1 installed inside the housing, a main circuit board 2, and multiple electrical connectors installed on the outside of the housing. It is used to convert the 28V DC power from the airborne power supply into 280V DC power and output it to the airborne air conditioning system.

[0020] The housing consists of six metal surfaces: a base plate 3, a top plate 4, a front panel 5, a rear panel 6, a left side panel 7, and a right side panel 8. Adjacent surfaces are fixed together by welding or screws. Two transformers 1 are arranged along the length of the housing. The four corners of the bottom of the transformers 1 are fixed to the base plate with screws. A transformer bracket 9 is installed on the outside of the transformers 1. The transformer bracket 9 is a folded door-shaped component that fits over the outside of the transformers 1. The bottom of the transformer bracket 9 is fixed to the base plate 3 with screws, thus fixing the transformers 1 to the base plate 3.

[0021] The four corners and the middle part of the bottom of the main circuit board 2 are fixedly installed on the base plate 3 by vertical support columns 10. The lower end of the support column 10 is fixed to the base plate 3 by screws, and the upper end of the support column 10 is fixed to the main circuit board 2 by screws. In order to ensure the stability of the installation of the main circuit board 2, support blocks 11 are fixedly installed on the left and right side plates by screws. The main circuit board 2 is supported on the top surface of the support block 11, and the main circuit board 2 is fixed to the support block 11 by screws.

[0022] In order to fix the converter on the helicopter, multiple mounting bosses 12 are provided on the left side plate 7 and the right side plate 8 respectively. The mounting bosses 12 are provided with screw holes, and the converter can be fixedly installed by using the screw holes and corresponding screws.

[0023] Supported by support columns 10, the main circuit board 2 is located at the center of the box in the height direction, and the two transformers 1 are located below the main circuit board 2. Numerous ventilation holes are machined on the rear panel 6, and a cooling fan 13 is fixedly installed on the inner side of the rear panel 6. When the cooling fan 13 is activated, it draws cool air from the outside of the helicopter cabin through the ventilation holes and blows it towards the main circuit board 2 and transformers 1. Correspondingly numerous ventilation holes are provided on the front panel 5, and the hot air after heat exchange dissipates from the front panel. Multiple vertical heat dissipation fins 14 are machined on the outer sides of the left side panel 7 and the right side panel 8, utilizing the cool air from the helicopter cabin's air conditioning system to dissipate heat from the box and remove internal heat.

[0024] The front panel is equipped with a DC input terminal block 15 and a control socket 16. A DC output socket 17 is located on the right side panel 7 near the rear panel 6. Both the DC output socket 17 and the control socket 16 use J599 electrical connectors, while the DC input terminal block 15 uses an SN25046 electrical connector. The main circuit board 1 integrates input filtering circuits, output filtering circuits, communication circuits, and power circuits.

[0025] The DC input terminal connects to the onboard power supply and receives 28V DC. This DC power is filtered by the input filter circuit before entering the input power circuit. The main circuit board integrates two power circuits with their input sections connected in parallel (both receiving 28V DC input). Each power circuit converts the 28V DC to 135V DC. The outputs of the two power circuits are connected in series, outputting 270V DC. This output is then filtered by the output filter circuit and output through the DC output socket. The input and output filters are passive filter circuits composed of inductors and capacitors. The two power circuits are connected to the communication circuit, which in turn connects to the control socket.

Claims

1. A helicopter-borne high-voltage DC-DC converter, comprising a housing and a transformer and a main circuit board mounted within the housing, the housing comprising a bottom plate, a top plate, a front panel, a rear panel, and left and right side panels, characterized in that, The transformer is fixed to the base plate at its four corners with screws. The main circuit board is fixed to the base plate with support columns. The main circuit board is located at the center of the box in the height direction and directly above the transformer. The rear panel has a dense array of ventilation holes. A cooling fan is fixedly installed on the inner side of the rear panel. The front panel has corresponding dense array of ventilation holes. The cooling fan draws air from the outside of the box and dissipates heat through the main circuit board and the transformer. The front panel has a DC input terminal block and a control socket. The right side panel has a DC output socket near the rear panel. The main circuit board integrates an input filter circuit, an output filter circuit, a communication circuit, and a power circuit. The DC power input to the DC input terminal block is filtered by the input filter circuit and then input to the power circuit. The high-voltage DC output from the power circuit is output from the DC output socket after passing through the output filter circuit. The power circuit is connected to the control socket through the communication circuit.

2. The airborne high-voltage DC converter for helicopters according to claim 1, characterized in that, The main circuit board integrates two power circuits. The input segments of the two power circuits are connected in parallel, and the output terminals of the two power circuits are connected in series. The two power circuits are respectively connected to the communication circuit.

3. The airborne high-voltage DC converter for helicopters according to claim 1, characterized in that, The four corners of the bottom surface of the main circuit board are supported in the box by vertical support columns. The lower end of the support column is fixed to the base plate by screws, and the upper end of the support column is fixed to the main circuit board by screws.

4. The airborne high-voltage DC converter for helicopters according to claim 1, characterized in that, Support blocks are fixedly installed on the left and right side panels by screws. The main circuit board is supported on the top surface of the support blocks and fixed to the support blocks by screws.

5. A helicopter-borne high-voltage DC converter according to claim 1, characterized in that, A transformer bracket is installed on the outside of the transformer. The transformer bracket is a gantry-shaped bent component. The transformer bracket is fitted onto the outside of the transformer, and the bottom of the transformer bracket is fixedly connected to the base plate by screws.

6. The airborne high-voltage DC converter for helicopters according to claim 1, characterized in that, The outer sides of the left and right side plates are each provided with multiple vertical heat dissipation fins.

7. The airborne high-voltage DC converter for helicopters according to claim 6, characterized in that, The left and right side plates are each provided with a plurality of mounting bosses, and the mounting bosses are provided with screw holes.

8. The airborne high-voltage DC converter for helicopters according to claim 1, characterized in that, The input and output filters are passive filter circuits composed of inductors and capacitors.

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