AC-dc dual input VPX power supply

Abstract

The utility model discloses a kind of AC-DC double-input VPX power supply, belong to VPX power supply technical field.A kind of AC-DC double-input VPX power supply, including input filter circuit, AC / DC conversion circuit, DC / DC conversion circuit, control circuit and output filter circuit, still include power supply shell and connector interface, wherein, the connector interface is located at one end of power supply shell, the other end of power supply shell is provided with puller, wherein, the side of puller is provided with heat dissipation hole, the both ends of connector interface are provided with keyhole.For solving the problem that the existing VPX power supply when AC and DC input exist simultaneously, conflict will occur between power supply, resulting in equipment operation failure, unable to meet the stable operation demand under extreme working condition, compatible AC-DC input is sampled single-phase diode and bidirectional cut-off scheme, by AC-GOOD signal control its operation, to ensure that AC is powered preferentially when AC and DC are powered simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of VPX power supply technology, specifically to an AC / DC dual-input VPX power supply. Background Technology

[0002] VPX is a high-performance embedded computing standard widely used in military, aerospace, industrial automation and other fields. Its power supply design must meet strict requirements for reliability, high power density and environmental adaptability.

[0003] Existing VPX power supplies can cause conflicts between AC and DC inputs when both are present, leading to equipment malfunctions and failing to meet the stable operation requirements under extreme conditions. Utility Model Content

[0004] The purpose of this invention is to provide a dual AC / DC input VPX power supply that is compatible with both AC and DC inputs. It uses a sampling single-phase diode and a bidirectional cutoff scheme, and controls its operation through an AC-GOOD signal to ensure that AC power is given priority when AC and DC are supplied simultaneously. This invention can solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an AC / DC dual-input VPX power supply, including an input filter circuit, an AC / DC conversion circuit, a DC / DC conversion circuit, a control circuit, and an output filter circuit, and also includes a power supply housing and a connector interface;

[0006] The connector interface is located at one end of the power supply housing, and the other end of the power supply housing is provided with a pull-out aid. A heat dissipation hole is provided on one side of the pull-out aid, and key holes are provided at both ends of the connector interface.

[0007] Preferably, the input filter circuit consists of an inductor and a capacitor.

[0008] Through the above technical solution, the circuit can effectively prevent noise and surge voltage from external electrical components from entering the power supply. At the same time, it can prevent strong electromagnetic harmonic radiation generated inside the power supply when the switching transistor is turned on and off at high speed from interfering with the external power supply, and reduce the reverse-feed noise voltage. By utilizing the filter's ability to prevent the current from rising instantaneously, it can effectively reduce the starting inrush current.

[0009] Preferably, the AC / DC conversion circuit consists of an AC / DC power supply module and peripheral circuitry.

[0010] The above technical solution converts the input AC voltage into stable DC power to supply power to the subsequent DC / DC module, ensuring that the power output meets the design requirements.

[0011] Preferably, the DC / DC conversion circuit consists of a DC / DC power supply module and peripheral circuitry.

[0012] The above technical solution converts the input high-voltage DC into low-voltage DC. The advantages of this circuit are small size, high power, and full input-output isolation.

[0013] Preferably, the control circuit consists of an auxiliary power supply, a control circuit, and a sampling feedback circuit.

[0014] Preferably, the output filter circuit consists of an inductor and a capacitor.

[0015] The above technical solution filters out AC components and noise in the output DC voltage, reduces the output voltage ripple coefficient, makes the waveform smoother, and ensures that the output parameters of the VPX power supply meet the standard parameters.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model is compatible with AC / DC input. It uses a sampling single-phase diode and a bidirectional cutoff scheme, and controls its operation through the AC-GOOD signal to ensure that AC power is given priority when AC and DC are supplied simultaneously. The main power output is achieved through sampling AC / DC to DC / DC module power conversion or direct DC / DC module power conversion. All selected modules meet the rated output power and have undergone reliability testing in the factory. The selected modules themselves have built-in overvoltage, overcurrent, short circuit and overtemperature protection. At the same time, the circuit internally samples the signal to the main chip, and the main chip performs voltage limiting, current limiting and temperature limiting protection again. This dual protection ensures the reliability of the power supply.

[0018] 2. In this utility model, the main chip not only controls the power supply's operating status, but also interacts with the host computer through IIC to meet the requirement of real-time monitoring of the power supply's operating status. Its IIC has two outputs to meet the one-in-one-out-of-charge scheme, and the IIC is isolated from external exchange sampling scheme. Anti-backflow measures are provided on each power supply output to meet hot-swap use. The product design meets the forced current sharing operation mode. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the power supply housing structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connector interface structure of this utility model;

[0021] Figure 3 This is a block diagram illustrating the power supply principle of this utility model;

[0022] Figure 4 This is a block diagram of the power health management system of this utility model.

[0023] In the diagram: 1. Power supply housing; 2. Connector interface; 3. Key hole; 4. Pull-out aid. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To address the issue of existing VPX power supplies causing conflicts and malfunctions when both AC and DC inputs are present, thus failing to meet stable operation requirements under extreme conditions; please refer to... Figure 1-4 The present invention provides the following solution:

[0026] Reference Figure 1-3 A dual-input AC / DC VPX power supply includes an input filter circuit, an AC / DC conversion circuit, a DC / DC conversion circuit, a control circuit, and an output filter circuit, as well as a power supply housing and a connector interface;

[0027] The input filter circuit consists of an inductor and capacitor bank. This circuit can effectively prevent noise and surge voltage from external electrical components from entering the power supply. At the same time, it can prevent strong electromagnetic harmonic radiation generated by the high-speed conduction and cutoff of the switching transistor inside the power supply from interfering with the external power supply, and reduce the reverse-feed noise voltage. By utilizing the filter's ability to prevent the current from rising instantaneously, it can effectively reduce the starting inrush current.

[0028] The AC / DC conversion circuit consists of an AC / DC power module and peripheral circuitry. It converts the input AC voltage into a stable DC voltage to power the subsequent DC / DC module, ensuring that the power output meets the design requirements.

[0029] The DC / DC converter circuit consists of a DC / DC power module and peripheral circuitry. It converts the input high-voltage DC voltage into low-voltage DC voltage. The advantages of this circuit are its small size, high power, and complete input-output isolation.

[0030] The control circuit consists of an auxiliary power supply, a control circuit, and a sampling feedback circuit to ensure the implementation of the EN, INH, and FAIL functions.

[0031] The output filter circuit consists of inductors and capacitors, which filter out AC components and noise in the output DC voltage, reduce the output voltage ripple coefficient, make the waveform smoother, and ensure that the output parameters of the VPX power supply meet the standard parameters.

[0032] The connector interface is located at one end of the power supply housing, and the other end of the power supply housing is equipped with a pull-out aid. The pull-out aid has a heat dissipation hole on one side, and key holes are provided at both ends of the connector interface.

[0033] The connector interface is defined as shown in the table below:

[0034]

[0035]

[0036] Among them, the IPMB bus adds an isolation chip, and the power module needs to support hot-swapping.

[0037] Output control interface, ENABLE# and INHIBIT# control logic; (for whole machine applications, pull-up and pull-down can be directly handled on the back panel) floating is "high", shorted to the output ground is "low".

[0038] Output control logic table:

[0039] high high OFF OFF Low high ON ON high Low OFF OFF Low Low ON OFF

[0040] The FAIL signal is used to indicate a fault. It is an open-collector signal that will be pulled low when any output is outside the specified voltage range.

[0041] The power supply has green LEDs on the front panel to indicate the input and output status. The LEDs are lit when the power supply is working properly and off when there is an error.

[0042] Indicator light status table:

[0043]

[0044] Reference Figure 4 The standard IPMI commands reference the IPMI protocol, and the power module has optional IIC functionality. It provides users with the ability to query power status. Users can monitor the output voltage, current, power status, and power board temperature of each VPX power supply. Communication supports the IPMI 2.0 interface and conforms to the VITA 46.11 specification. The interface being used is dynamically identified based on the incoming data structure without any additional configuration. The IPMB address, defined by VITA 46.11, is used for communication via the IPMI interface.

[0045] IPMI uses a request-response protocol for communication. A request message is sent to a smart device, and the device returns a separate response message. The IPMI communication protocol uses point-to-point transmission, and data packets contain IPMB connection headers, command bytes, and data bytes.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-input AC / DC VPX power supply, characterized in that, It includes an input filter circuit, an AC / DC conversion circuit, a DC / DC conversion circuit, a control circuit, and an output filter circuit, as well as a power supply housing and a connector interface; The connector interface is located at one end of the power supply housing, and the other end of the power supply housing is provided with a pull-out aid. A heat dissipation hole is provided on one side of the pull-out aid, and key holes are provided at both ends of the connector interface.

2. The AC / DC dual-input VPX power supply according to claim 1, characterized in that: The input filter circuit consists of inductors and capacitors.

3. The AC / DC dual-input VPX power supply according to claim 1, characterized in that: The AC / DC conversion circuit consists of an AC / DC power supply module and peripheral circuitry.

4. The AC / DC dual-input VPX power supply according to claim 1, characterized in that: The DC / DC conversion circuit consists of a DC / DC power supply module and peripheral circuitry.

5. The AC / DC dual-input VPX power supply according to claim 1, characterized in that: The control circuit consists of an auxiliary power supply, a control circuit, and a sampling feedback circuit.

6. The AC / DC dual-input VPX power supply according to claim 1, characterized in that: The output filter circuit consists of an inductor and a capacitor.

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