CN219627366U

CN219627366U - Power supply lightning suppressor

Info

Publication number: CN219627366U
Application number: CN202320137607.9U
Authority: CN
Inventors: 康华; 张勇; 熊秀; 金祖升; 蔡明娟
Original assignee: Unit 92728 Of Pla; XI'AN AIRBORNE ELECTROMAGNETIC TECHNOLOGY CO LTD
Current assignee: Unit 92728 Of Pla; XI'AN AIRBORNE ELECTROMAGNETIC TECHNOLOGY CO LTD
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-09-01
Anticipated expiration: 2033-01-31

Abstract

The disclosure provides a power supply lightning suppressor, and relates to the technical field of lightning protection. The suppressor comprises a shell, wherein an input connector, an output connector and a grounding column are arranged on the shell, and a protection circuit is arranged in the shell; the protection circuit comprises a first filter circuit and a second filter circuit which are connected in series, wherein the input end of the first filter circuit is connected with the input connector, and the output end of the second filter circuit is connected with the output connector; a first-stage protection circuit is arranged between the input connector and the first filter circuit, and a second-stage protection circuit is arranged between the first filter circuit and the second filter circuit; the first-stage protection circuit and the second-stage protection circuit are both connected with the grounding column. According to the power supply lightning suppressor, the lightning protection effect can be reduced to completely meet the requirement of power supply protection while other power supply characteristic tests are compatible, so that the problem of incompatibility among various protection of the power supply can be solved.

Description

Power supply lightning suppressor

Technical Field

The disclosure relates to the technical field of lightning protection, in particular to a power supply lightning suppressor.

Background

When electric equipment such as an airborne, a ship and the ground is subjected to lightning induction interference, the electric equipment is easy to damage, and the normal use of the electric equipment such as the airborne, the ship and the ground is seriously influenced. On the prior airborne, naval vessel and ground equipment, the corresponding lightning protection device is additionally arranged, so that the problem that part of lightning induction damages equipment can be solved, but because the equipment needs to pass a plurality of tests, each test needs different protection schemes, the protection schemes are compatible with each other, and the combined protection can be realized only by giving way of slippers in parameter selection. Therefore, the protection effect of the circuit is reduced, and most of the existing protection products cannot completely solve the lightning induction protection problem of electric equipment such as an airborne device, a ship, the ground and the like. There is no guarantee that the electrical equipment is not damaged. In particular, the power supply device is damaged after being subjected to lightning induced interference, which can cause other circuit devices to fail to operate. The safety of electrical equipment such as an airborne device, a ship, the ground and the like is seriously affected.

The scheme aiming at the power supply protection is also mature gradually, the current independent protection design effect meets the use requirement, but as a lot of equipment needs to be subjected to the lightning test after the power supply characteristic test, the parameter selection of the device in the power supply characteristic test conflicts with the lightning protection, and the existing protection device and circuit can deteriorate if all the power supply characteristic tests and the lightning tests are met, how to enable all the protection schemes to be compatible becomes more and more needed.

Disclosure of Invention

According to the power supply lightning suppressor, the lightning protection effect can be reduced to completely meet the requirement of power supply protection while other power supply characteristic tests are compatible, so that the problem of incompatibility among various protection of the power supply can be solved.

According to a first aspect of embodiments of the present disclosure, there is provided a lightning suppressor for a power supply, the suppressor comprising a housing provided with an input connector, an output connector and a ground post, a protection circuit being provided in the housing;

the protection circuit comprises a first filter circuit and a second filter circuit which are connected in series, wherein the input end of the first filter circuit is connected with the input connector, and the output end of the second filter circuit is connected with the output connector;

a first-stage protection circuit is arranged between the input connector and the first filter circuit, and a second-stage protection circuit is arranged between the first filter circuit and the second filter circuit;

the first-stage protection circuit and the second-stage protection circuit are both connected with the grounding column.

The embodiment of the disclosure provides a power supply lightning suppressor, which is connected with a transient blocking device in series so that the power supply lightning suppressor in the disclosure normally works in a lightning test process, but when 80V and 50ms power characteristics are tested, the transient blocking device is used for switching off a lightning protection device loop in a transient mode, and device damage is avoided. Therefore, the purpose that lightning indirect effect protection and 80V,50ms power characteristic test are simultaneously met is achieved.

In one embodiment, the second-stage protection circuit is formed by connecting a TVS diode and a transient blocking device in series, an input end of the TVS diode is connected to a circuit between the first filter circuit and the second filter circuit, and an output end of the transient blocking device is connected to the ground post.

In one embodiment, the first stage protection circuit is a gas discharge tube device, an input end of the gas discharge tube device is connected to a circuit between the input connector and the first filter circuit, and an output end of the gas discharge tube device is connected to the ground post.

In one embodiment, the input of the input connector is connected to a 28V dc power signal.

In one embodiment, the turn-on voltage of the TVS diode is 54V.

In one embodiment, the turn-on voltage of the first stage protection circuit is 90V.

In one embodiment, the power lightning inhibitor is used for lightning induction protection of on-board, marine and ground electrical equipment.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural view of a power lightning suppressor of an embodiment of the present disclosure;

fig. 2 is a schematic circuit diagram of a lightning suppressor for a power supply according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of devices and systems that are consistent with some aspects of the disclosure, as detailed in the accompanying claims.

Fig. 1 is a schematic structural diagram of a lightning suppressor for power supply according to an embodiment of the present disclosure. As shown in fig. 1, the power lightning suppressor provided by the present disclosure includes a housing 101, an input connector 102, an output connector 103 and a grounding post 104 are disposed on the housing 101, and a protection circuit is disposed in the housing.

Fig. 2 is a schematic circuit diagram of a lightning suppressor for a power supply according to an embodiment of the present disclosure. As shown in fig. 2, the protection circuit includes a first filter circuit and a second filter circuit connected in series, an input end of the first filter circuit is connected with the input connector, and an output end of the second filter circuit is connected with the output connector;

For a 28V dc power supply, the normal lightning protection device operating voltage is around 40V, with a duration of between about 1ns and 1000us, beyond which time damage to the device may occur. Therefore, when the lightning test and the 80V,50ms power characteristic test are required to be simultaneously satisfied, the action voltage of the lightning protection device must be increased, and even more than 80V can simultaneously satisfy the two test requirements, so that the lightning protection effect is greatly reduced, and the 28V direct current power supply is damaged.

According to the power supply lightning suppressor provided by the embodiment of the disclosure, the transient blocking device is connected in series, so that the power supply lightning suppressor in the disclosure normally works in a lightning test process, but when 80V and 50ms power supply characteristics are tested, the transient blocking device is used for switching off a lightning protection device loop in a transient mode, and damage to the device is avoided. Therefore, the purpose that lightning indirect effect protection and 80V,50ms power characteristic test are simultaneously met is achieved.

As shown in fig. 2, the second-stage protection circuit in this embodiment is formed by serially connecting a TVS diode and a transient blocking device, wherein an input end of the TVS diode is connected to a circuit between the first filter circuit and the second filter circuit, and an output end of the transient blocking device is connected to a ground post; when the voltage input by the input connector exceeds 54V, the TVS diode is turned on, the voltage in the circuit is limited to a lower value, and the safety of the 28V direct current power supply is protected.

Specifically, at the time of actual use:

when lightning interference is input, the response speed of the transient blocking device TBU is low, and the circuit cannot be turned off within 1ns-1000us, so that current flows through the transient blocking device TBU and flows into the ground through the grounding point, and the lightning protection effect is realized.

When 80V,50ms power characteristic test is carried out, when 80V,50ms voltage is input to the input connector, the TVS diode is turned on under the condition that the voltage exceeds the on voltage of the TVS diode, but the operation time of the transient blocking device TBU is enough to meet the 50ms time, the transient blocking device TBU works, a loop connecting the TVS diode and the transient blocking device TBU in series is disconnected, the connection of the circuit and the TVS diode cannot be grounded, and the TVS diode cannot be conducted, so that damage in the 80V,50ms power characteristic test is avoided.

As shown in fig. 2, the first stage protection circuit in this embodiment is a gas discharge tube device GDT, an input end of the gas discharge tube device is connected to a circuit between the input connector and the first filter circuit, and an output end of the gas discharge tube device is connected to the ground post. After the direct current power supply signal is input, the opening voltage of the first-stage protection circuit is 90V through the protection of the first-stage protection circuit, the first filtering circuit connected in series in the circuit filters power supply ripple waves after the protection of the first-stage protection circuit, and the power supply ripple waves enter the second-stage protection circuit after the power supply ripple waves are filtered.

In specific implementation, the power lightning suppressor in the embodiment can be used for lightning induction protection of airborne, ship and ground electrical equipment.

The working principle of the power lightning suppressor provided by the disclosure is as follows:

the 28V direct current power supply signal is input into the circuit through the input connector, and is output through the output end connector after passing through the protection circuit; after the direct current power supply signal is input, the power supply ripple is filtered by a first filtering circuit connected in series in the circuit after the protection of a first-stage protection circuit, the power supply ripple enters a second-stage protection circuit after the power supply ripple is filtered, the turn-on voltage of a TVS diode is 54V, and when the voltage input by an input connector exceeds 54V, the TVS diode is turned on to limit the voltage in the circuit to a lower value, so that the safety of a 28V direct current power supply is protected; when lightning interference is input, the response speed of the transient blocking device TBU device is low, and the circuit cannot be turned off within 1ns-1000us, so that current flows through the transient blocking device TBU and flows into the ground through the grounding point, and the lightning protection effect is realized; when the power characteristic test of 80V and 50ms is carried out, the input connector inputs 80V and 50ms voltage, the TVS diode is turned on under the condition that the voltage exceeds the turn-on voltage of the TVS diode, but the operation time of the transient blocking device TBU is enough to meet the 50ms time, the transient blocking device TBU works, a loop connected with the TVS diode and the TBU in series is disconnected and cannot be grounded, and the TVS diode cannot be conducted, so that the damage in the power characteristic test of 80V and 50ms is avoided.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. The power lightning suppressor is characterized by comprising a shell, wherein an input connector, an output connector and a grounding column are arranged on the shell, and a protection circuit is arranged in the shell;

2. The power lightning suppressor of claim 1, wherein the second stage protection circuit is comprised of a TVS diode and a transient blocking device in series, an input of the TVS diode being connected to a circuit between the first filter circuit and the second filter circuit, and an output of the transient blocking device being connected to the ground post.

3. The power lightning suppressor of claim 1, wherein the first stage protection circuit is a gas discharge tube device, an input of the gas discharge tube device is connected to a circuit between the input connector and the first filter circuit, and an output of the gas discharge tube device is connected to the ground post.

4. The mains lightning suppressor of claim 2, wherein the input of the input connector is in signal connection with a 28V dc power supply.

5. The power lightning suppressor of claim 4, wherein the TVS diode has an on voltage of 54V.

6. The power lightning suppressor of claim 4, wherein the turn-on voltage of the first stage protection circuit is 90V.

7. A mains lightning suppressor according to any of claims 1 to 3, for lightning-induced protection of on-board, marine and ground electrical equipment.