CN115987095A

CN115987095A - Power supply board and power supply circuit for reinforcing display

Info

Publication number: CN115987095A
Application number: CN202310006406.XA
Authority: CN
Inventors: 付秀洋; 周军; 刘龙飞
Original assignee: Changsha HCC Hiden Technology Co Ltd
Current assignee: Changsha HCC Hiden Technology Co Ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-04-18

Abstract

The invention discloses a power supply board and a power supply circuit for reinforcing a display, which comprise a power loop and a control loop, wherein the input end of the power loop is connected with a power supply and outputs after adjusting the power; the control loop is connected with the power loop and carries out isolation control on the power loop based on an external control signal. The power panel has the advantages that the power panel is flexible in configuration, requirements of different products, different power supply voltages among different board cards and different power supply time sequences can be met, a control interface is reserved and effective electrical isolation is carried out, and the power panel is safe and convenient to use. Meanwhile, the power supply circuit of the reinforced display can meet the requirements of the corresponding display on different power supply voltages and different power supply time sequences.

Description

Power supply board and power supply circuit for reinforcing display

Technical Field

The invention relates to the field of circuit control, in particular to a power supply board and a power supply circuit for a reinforced display.

Background

In military fields such as vehicle-mounted, ship-based and airborne fields, the state of the board cards in the product is complex due to the limitation of a series of factors, and the board cards comprise self-developed board cards, outsourcing board cards, passenger supply board cards and the like. In the above, the power supply requirements of each board card are different, so that the power supply system is required to have the characteristic of flexible configuration, and the requirements of different products, different power supply voltages among different board cards and different power supply time sequences can be met.

However, the conventional power panel usually has only two interfaces, namely, a power input interface and a power output interface, and is inconvenient for power supply timing control. Although the enable control pins are reserved in part of the power panels, effective electrical isolation is not performed, so that inconvenience in use is caused, and even potential safety hazards are left.

Disclosure of Invention

In order to solve the technical problems that the conventional power panel is inconvenient to use and has potential safety hazards, the invention provides the power panel which can be configured according to needs and is effectively electrically isolated and the power circuit of the reinforced display.

In order to achieve the technical purpose, the technical scheme of the invention is that,

a power panel comprises a power loop and a control loop, wherein the input end of the power loop is connected with a power supply and outputs power after being adjusted; the control loop is connected with the power loop and carries out isolation control on the power loop based on an external control signal.

In the power panel, the power loop comprises a power input interface, a power conversion module and a power output interface; the power input interface comprises a power anode inlet and a power cathode inlet; the power output interface comprises a power anode outlet and a power cathode outlet; the power conversion module comprises an enabling interface end, a positive input end connected to a positive inlet of a power supply, a negative input end connected to a negative inlet of the power supply, a positive output end connected to a positive outlet of the power supply and a negative output end connected to a negative outlet of the power supply, wherein the enabling interface end and the negative input end are connected to a control loop.

In the power panel, the control loop comprises a control signal interface, a first current-limiting resistor, an isolation optocoupler and a current amplifying circuit; the control signal interface comprises a control power supply anode inlet, a control power supply cathode inlet and a control signal inlet, wherein the control power supply anode inlet is connected to the input end of the isolation optocoupler through a first current-limiting resistor, and the control power supply cathode inlet and the control signal inlet are connected to the input end of the isolation optocoupler through a current amplification circuit and form a loop with the control power supply anode inlet; the output end of the isolation optocoupler is connected to the enabling interface end and the negative input end of the power conversion module respectively.

In the power panel, the current amplifying circuit comprises a second current-limiting resistor, an initial level control resistor and a current amplifying triode; the second current limiting resistor is connected between the control signal inlet and the base electrode of the current amplifying triode in series; the emitting electrode of the current amplification triode is connected with the negative electrode inlet of the control power supply; one end of the initial level control resistor is connected between the base electrode of the current amplification triode and the second current-limiting resistor, and the other end of the initial level control resistor is connected between the emitting electrode of the current amplification triode and the negative electrode inlet of the control power supply; the collector of the current amplification triode is connected with the input end of the isolation optocoupler.

The power panel further comprises a jumper device, wherein the jumper device is connected to the output end of the isolation optocoupler and can enable the output end of the isolation optocoupler to be short-circuited when needed, so that the control loop is forbidden and the power loop is enabled to be forcibly output.

The power supply circuit for the reinforced display adopts the power supply boards, the number of the power supply boards is at least two, one power supply board disables a control loop through a jumper wire to serve as a standby power supply, and the other power supply boards are respectively connected with a power supply and corresponding control signals and output the power supply according to the corresponding control signals.

The power panel has the advantages that the power panel is flexible in configuration, requirements of different products, different power supply voltages among different board cards and different power supply time sequences can be met, a control interface is reserved and effective electrical isolation is carried out, and the power panel is safe and convenient to use. Meanwhile, the power supply circuit of the reinforced display can meet the requirements of the corresponding display on different power supply voltages and different power supply time sequences.

Drawings

Fig. 1 is a block diagram of a power panel system according to an embodiment of the invention.

Fig. 2 is a schematic diagram of a power board circuit according to an embodiment of the invention.

FIG. 3 is a schematic diagram of a power circuit of a ruggedized display according to an embodiment of the invention.

Detailed Description

Referring to fig. 1, the power panel provided in this embodiment mainly includes a power loop and a control loop, where the power loop implements power conversion, implements one-path power output, and the control loop implements on/off of a power supply.

Referring to fig. 2, in the power panel disclosed in this embodiment, the power conversion loop is composed of a power input interface J1, a power conversion module U1, and a power output interface J2. The control loop is composed of a control signal interface J3, a first current limiting resistor R1, an isolation optocoupler U2, a jumper wire 1 and a current amplifying circuit. The current amplifying circuit is composed of a current amplifying triode Q1, a second current limiting resistor R2 and an initial level control resistor R3. The power input interface J1 includes a power positive inlet and a power negative inlet. The power output interface J2 comprises a power positive outlet and a power negative outlet. The power conversion module U1 comprises an enabling interface end, a positive input end connected to a positive inlet of a power supply, a negative input end connected to a negative inlet of the power supply, a positive output end connected to a positive outlet of the power supply and a negative output end connected to a negative outlet of the power supply, wherein the enabling interface end and the negative input end are connected to the control loop.

The control loop comprises a control signal interface J3, a first current limiting resistor R1, an isolation optocoupler U2 and a current amplification circuit. The control signal interface comprises a control power supply anode inlet, a control power supply cathode inlet and a control signal inlet, wherein the control power supply anode inlet is connected to the input end of the isolation optocoupler through a first current-limiting resistor, and the control power supply cathode inlet and the control signal inlet are connected to the input end of the isolation optocoupler through a current amplification circuit and form a loop with the control power supply anode inlet. The output end of the isolation optocoupler is connected to the enabling interface end and the negative input end of the power conversion module respectively.

The current amplifying circuit comprises a second current limiting resistor R2, an initial level control resistor R3 and a current amplifying triode Q1. The second current limiting resistor is connected between the control signal inlet and the base of the current amplifying triode in series. And the emitter of the current amplification triode is connected with the negative inlet of the control power supply. One end of the initial level control resistor is connected between the base electrode of the current amplification triode and the second current limiting resistor, and the other end of the initial level control resistor is connected between the emitting electrode of the current amplification triode and the negative electrode inlet of the control power supply. The collector of the current amplification triode is connected with the input end of the isolation optocoupler.

When the control signal interface is actually used, the positive control power supply and the negative control power supply of the control signal interface are respectively connected with the positive electrode and the negative electrode of an external control power supply, the control signal is connected with an external control signal of TTL level, and the high level of the signal is effective.

The power conversion module in the embodiment is an isolation module, and the effective isolation between the primary side and the secondary side in the power loop is met. Isolation optocoupler U2 in the control loop isolates the control signal from the primary, so that electrical safety is guaranteed while electrical isolation is guaranteed. The current-limiting resistor R1 adjusts the luminous intensity of the optocoupler, and effective opening of the isolation optocoupler U2 is guaranteed. Current amplification circuit is constituteed to current amplification triode Q1, current-limiting resistor R2 and initial level control resistance R3, reduces the requirement to control signal driving capability, and wherein current-limiting resistor R2 carries out current regulation, and initial level control resistance R3 guarantees that default condition switch cuts off, and current amplification triode Q1 then plays the current amplification effect. The jumper 1 plays a role of disabling the control loop, so that the power conversion loop outputs forcibly. In this embodiment, different power conversion modules in the power loop may be changed or the setting of the power conversion module may be directly adjusted to achieve different power supply voltage outputs.

Referring to fig. 3, specifically to the application of the ruggedized display, the control loop 1 is disabled according to the requirements of different products, different power supply voltages between different boards, and different power supply timing sequences, so that the power loop 1 is directly output as the standby power by default. The subsequent control loop 2-n is controlled by an external control signal to control the output and power supply timing of the power loop 2-n. Therefore, the control of different power supply time sequences is realized by adjusting the time sequence of the control signal.

Claims

1. A power panel is characterized by comprising a power loop and a control loop, wherein the input end of the power loop is connected with a power supply and outputs after adjusting the power; the control loop is connected with the power loop and carries out isolation control on the power loop based on an external control signal.

2. The power strip of claim 1, wherein said power loop comprises a power input interface, a power conversion module and a power output interface; the power input interface comprises a power anode inlet and a power cathode inlet; the power output interface comprises a power anode outlet and a power cathode outlet; the power conversion module comprises an enabling interface end, a positive input end connected to a positive inlet of a power supply, a negative input end connected to a negative inlet of the power supply, a positive output end connected to a positive outlet of the power supply and a negative output end connected to a negative outlet of the power supply, wherein the enabling interface end and the negative input end are connected to a control loop.

3. The power strip of claim 2, wherein said control loop comprises a control signal interface, a first current limiting resistor, an isolating optocoupler, and a current amplifying circuit; the control signal interface comprises a control power supply positive inlet, a control power supply negative inlet and a control signal inlet, wherein the control power supply positive inlet is connected to the input end of the isolation optocoupler through a first current-limiting resistor, and the control power supply negative inlet and the control signal inlet are connected to the input end of the isolation optocoupler through a current amplification circuit and form a loop with the control power supply positive inlet; the output end of the isolation optocoupler is connected to the enabling interface end and the negative input end of the power conversion module respectively.

4. A power strip as claimed in claim 3, wherein said current amplifying circuit comprises a second current limiting resistor, an initial level control resistor and a current amplifying transistor; the second current limiting resistor is connected between the control signal inlet and the base electrode of the current amplifying triode in series; the emitting electrode of the current amplification triode is connected with the negative electrode inlet of the control power supply; one end of the initial level control resistor is connected between the base electrode of the current amplification triode and the second current limiting resistor, and the other end of the initial level control resistor is connected between the emitting electrode of the current amplification triode and the negative electrode inlet of the control power supply; the collector of the current amplification triode is connected with the input end of the isolation optocoupler.

5. The power panel of claim 3, further comprising a jumper connected to the output of the isolating optocoupler and capable of shorting the output of the isolating optocoupler when needed, thereby disabling the control loop and forcing the power loop to output.

6. A power supply circuit for reinforcing a display, which is characterized in that the power supply board of claim 5 is adopted, the number of the power supply boards is at least two, one power supply board disables a control loop through a jumper wire to be used as a standby power supply, and the other power supply boards are respectively connected with a power supply and corresponding control signals and output the power supply according to the corresponding control signals.