Reinforced CPCI airborne power supply

Abstract

The utility model discloses a reinforced CPCI airborne power supply, which comprises a shell, an upper cover, a power panel, a pull-assisting device, a locking strip and cold conduction strips, the power panel is attached and fixed on the shell, the upper cover is detachably connected with the shell, the locking strip is arranged on the connecting part of the upper cover and the shell, the cold conduction strips are respectively arranged on two long edges of the shell, and the pull-assisting device is detachably connected with the shell. And the pulling assisting device is arranged on a short edge of the shell. The reinforced CPCI airborne power supply adopts a reinforced CPCI power supply structure, can be applied to the field of airborne power supply, and is convenient to plug and unplug, strong in replaceability, good in heat dissipation, strong in vibration resistance and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current power supplies, in particular to a reinforced CPCI airborne power supply. Background Art

[0002] The traditional 28V input DC-DC airborne DC power supply has the following problems:

[0003] First, most onboard power supplies are customized, with different shapes and poor replaceability;

[0004] Second, to improve system reliability, there is no fan inside the airborne system for heat dissipation. The boards and power supplies inside the traditional CPCI structure chassis are all open structures, which greatly reduces the system's seismic resistance, reliability and life in a windless environment.

[0005] Third, traditional airborne power supplies use electrolytic capacitors as energy storage elements to meet the requirement that the power supply can work normally within 50ms after the system loses power. High altitude and low air pressure reduce the withstand voltage level of electrolytic capacitors, deteriorate insulation and sealing performance, increase temperature rise, and reduce life. Therefore, traditional airborne power supplies can only work at low altitudes below 2000m. Utility Model Content

[0006] In view of the defects in the prior art, the utility model provides a reinforced CPCI airborne power supply, which is easy to plug and unplug, has strong replaceability, good heat dissipation, strong vibration resistance and high reliability.

[0007] The utility model provides a reinforced CPCI airborne power supply, comprising: a shell, an upper cover, a power board, an auxiliary puller, a locking strip and a cooling strip, wherein the power board is attached and fixed to the shell, the upper cover is detachably connected to the shell, the locking strip is arranged at the position where the upper cover is connected to the shell, the cooling strip is respectively arranged on the two long sides of the shell, and the auxiliary puller is arranged on a short side of the shell.

[0008] Furthermore, the locking strip adopts a 5-section locking device or a 3-section locking device.

[0009] Furthermore, the power board and the bottom of the shell are filled with potting glue.

[0010] Furthermore, the power board comprises a power output terminal, and the power output terminal is arranged on the opposite side to the short side where the extraction aid is arranged.

[0011] Furthermore, the power board includes an EMC protection circuit, a reverse connection protection circuit, an energy storage circuit, a DC-DC voltage stabilizing circuit and an output filtering circuit, and the EMC protection circuit, the reverse connection protection circuit, the energy storage circuit, the DC-DC voltage stabilizing circuit and the output filtering circuit are connected in sequence.

[0012] Furthermore, the energy storage circuit includes a second MOS tube, a first tantalum capacitor, a first diode and a first resistor, the positive electrode of the first tantalum capacitor is connected to the output end of the reverse protection circuit, the negative electrode of the first tantalum capacitor is respectively connected to the negative electrode of the first diode and the drain of the second MOS tube, the positive electrode of the first diode and the source of the second MOS tube are respectively connected to one end of the first resistor, and the other end of the first resistor is grounded.

[0013] Furthermore, the first tantalum capacitor is a high-energy tantalum hybrid capacitor.

[0014] Furthermore, the filter capacitor in the output filter circuit is a polymer tantalum capacitor.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a reinforced CPCI airborne power supply which adopts a reinforced CPCI power supply structure and can be applied in the field of airborne power supply. The utility model has the advantages of convenient plugging and unplugging, strong replaceability, good heat dissipation, strong vibration resistance and high reliability.

[0017] The reinforced CPCI airborne power supply provided by the utility model uses high-energy tantalum hybrid capacitors and polymer tantalum capacitors as energy storage filter components inside the power supply, which can meet the environmental requirements of high altitude, low air pressure and wide temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A structural schematic diagram of a reinforced CPCI airborne power supply provided in an embodiment of the utility model;

[0020] Figure 2 An exploded diagram of a reinforced CPCI airborne power supply provided in an embodiment of the utility model;

[0021] Figure 3 The figure is a circuit diagram of the power board in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0023] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0024] Please refer to Figure 1-3 The first embodiment of the utility model provides a reinforced CPCI airborne power supply, comprising: a shell 1, an upper cover 2, a power board 3, an extraction aid 5, a locking strip 6 and a cooling strip 7. The power board 3 is attached and fixed to the shell 1, and the upper cover 2 is detachably connected to the shell 1. The locking strip 6 is arranged at the position where the upper cover 2 is connected to the shell 1, and the cooling strip 7 is respectively arranged on the two long sides of the shell 1, and the extraction aid 5 is arranged on a short side of the shell. The power board 3 includes a power output terminal 4, and the power output terminal 4 is arranged on the opposite side of the short side where the extraction aid 5 is arranged. The power board 3 is fixed on the shell 1 so that the DC-DC voltage stabilizing circuit, the main heat generating component on the power board, is close to the shell for heat dissipation. The power board 3 and the shell 1 are filled with potting glue 8 for protection to meet the requirements of complex working environments. The power output terminal 4 adopts the standard PCI terminal PCIH47M400A1 of POSITRONIC company, which is convenient for powering other devices. The upper cover 2 is fastened to the housing 1 by screws, and the extraction aid helps the power board to be inserted into or pulled out of the housing, and provides the necessary support force when the onboard power supply is pulled out from the chassis. The locking strip 6 is fixed to the position of the power supply cooling strip. After the power supply is inserted into the chassis, the cooling strip is tightly attached to the chassis wall through the deformation of the locking strip to dissipate heat, and the power supply is further fixed. The locking strip 6 adopts a 5-section locking device or a 3-section locking device. In this embodiment, the locking strip adopts a 5-section locking device.

[0025] In addition, the power board 3 includes an EMC protection circuit, a reverse connection protection circuit, an energy storage circuit, a DC-DC voltage stabilizing circuit and an output filter circuit, which are connected in sequence. The EMC protection circuit is composed of TVS tubes Z1, Z2, common mode filter inductor L1 and film capacitors C1, C2, and the EMC characteristics of the whole machine meet the GJB151B-2013 standard. The reverse connection protection circuit is composed of MOS tube V1 and related control circuits. The MOS tube replaces the traditional diode reverse connection protection function, which improves the efficiency of the whole machine and reduces the heating of the power tube. The reverse connection protection circuit prevents the reverse voltage spike at the input end from damaging the subsequent circuit. At the same time, at the moment of shutdown or input power failure, it prevents the current of the subsequent energy storage circuit from reverse discharge.

[0026] The energy storage circuit is composed of a high-energy tantalum hybrid capacitor E1 and related charging and discharging circuits. Specifically, the energy storage circuit includes a second MOS tube V2, a first tantalum capacitor E1, a first diode D1 and a first resistor R1. The positive electrode of the first tantalum capacitor E1 is connected to the output end of the reverse connection protection circuit, the negative electrode of the first tantalum capacitor E1 is respectively connected to the negative electrode of the first diode D1 and the drain of the second MOS tube V2, the positive electrode of the first diode D1 and the source of the second MOS tube V2 are respectively connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded. The first tantalum capacitor E1 adopts a high-energy tantalum hybrid capacitor. The capacity of the tantalum capacitor is determined by the power of the product. In order to prevent the capacitor from being damaged by excessive charging current at the moment of power-on, its charging current must be limited. The charging circuit is composed of a current sampling resistor R1, a linear adjustment switch MOS tube V2 and a related control circuit. The charging circuit samples the current through R1 to control the linear conduction state of the MOS tube V1, thereby adjusting the maximum current during charging. When the power is off or shut down, the tantalum capacitor E1 is discharged through the diode D1. The DC-DC voltage regulator circuit is a universal 28V input isolated power supply. The filter capacitor E2 in the output filter circuit is a polymer tantalum capacitor.

[0027] The width of the reinforced CPCI power supply structure can be expanded from 4HP (20.32mm) to 8HP (40.64mm), suitable for 3U or 6U chassis, and the power can reach 50-600W. The technical solution of this utility model uses high-energy tantalum hybrid capacitors and polymer capacitors instead of traditional liquid electrolytic capacitors to meet the environmental requirements of high altitude, low air pressure and wide temperature range; the DC-DC converter inside the power supply adopts standard module power supply products with high power density and high reliability; the power board and the bottom plate are protected by two-component silicone filling, which improves the overall vibration resistance and environmental adaptability of the product, and the working environment temperature range can reach -55℃~85℃. The product can meet the requirements of GJB151B-2013 "Requirements and Measurements of Electromagnetic Radiation and Sensitivity of Military Equipment and Subsystems", GJB152A-1997 "Requirements for Electromagnetic Emission and Sensitivity of Military Equipment and Subsystems" and GJB 181B-2012 "Aircraft Power Supply Characteristics".

[0028] The utility model provides a reinforced CPCI airborne power supply, which adopts a reinforced CPCI power supply structure and can be applied in the field of airborne power supply. It is easy to plug and unplug, has strong replaceability, good heat dissipation, strong vibration resistance and high reliability. High-energy tantalum hybrid capacitors and polymer tantalum capacitors are used to replace traditional electrolytic capacitors as energy storage filter components inside the power supply, so that the power supply equipment can work safely and reliably in a high altitude and low pressure environment above 2000m, meeting the working environment temperature of -55℃~85℃.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A reinforced CPCI airborne power supply, characterized in that: include: A shell, an upper cover, a power board, an ejector, a locking strip and a cooling strip, wherein the power board is attached and fixed to the shell, the upper cover is detachably connected to the shell, the locking strip is arranged at the position where the upper cover and the shell are connected, the cooling strip is respectively arranged on the two long sides of the shell, and the ejector is arranged on a short side of the shell.

2. The reinforced CPCI airborne power supply according to claim 1, characterized in that: The locking strip adopts a 5-section locking device or a 3-section locking device.

3. The reinforced CPCI airborne power supply according to claim 1, characterized in that: The power board and the bottom of the shell are filled with potting glue.

4. The reinforced CPCI airborne power supply according to claim 1, characterized in that: The power board comprises a power output terminal, and the power output terminal is arranged on the opposite side to the short side of the pull-out aid.

5. The reinforced CPCI airborne power supply according to claim 1, characterized in that: The power board includes an EMC protection circuit, a reverse connection protection circuit, an energy storage circuit, a DC-DC voltage stabilizing circuit and an output filtering circuit, and the EMC protection circuit, the reverse connection protection circuit, the energy storage circuit, the DC-DC voltage stabilizing circuit and the output filtering circuit are connected in sequence.

6. The reinforced CPCI airborne power supply according to claim 5, characterized in that: The energy storage circuit includes a second MOS tube, a first tantalum capacitor, a first diode and a first resistor, wherein the positive electrode of the first tantalum capacitor is connected to the output end of the reverse connection protection circuit, the negative electrode of the first tantalum capacitor is respectively connected to the negative electrode of the first diode and the drain of the second MOS tube, the positive electrode of the first diode and the source of the second MOS tube are respectively connected to one end of the first resistor, and the other end of the first resistor is grounded.

7. The reinforced CPCI airborne power supply according to claim 6, characterized in that: The first tantalum capacitor is a high-energy tantalum hybrid capacitor.

8. The reinforced CPCI airborne power supply according to claim 7, characterized in that The filter capacitor in the output filter circuit is a polymer tantalum capacitor.

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