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Power supply protection circuit system of load equipment

A technology for power supply protection and load equipment, applied in the field of power supply protection circuit systems, can solve the problem that the load cannot automatically regain power supply, etc., achieves the effects of flexibility and time saving, increasing the selection range, and strong versatility

Pending Publication Date: 2021-12-21
广东化能智能科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a power supply protection circuit system for load equipment. The voltage of the equipment load is protected due to a short circuit of the power supply or other recoverable faults due to operation errors. When the error or fault is eliminated, it is not necessary to manually or manually make the system re-supply power to the load. The ability to automatically restore power supply brings operational flexibility and time savings to system engineering. This protection circuit has strong versatility and aims to solve the problem that the load cannot be restored after the load power supply is protected in the prior art. Problems with automatic power recovery

Method used

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  • Power supply protection circuit system of load equipment
  • Power supply protection circuit system of load equipment
  • Power supply protection circuit system of load equipment

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Effect test

Embodiment 1

[0034] refer to Figure 1-6 As shown, the power supply protection circuit system of load equipment includes working power supply and reference power supply circuit, normal working indication and abnormal alarm circuit, current limiting circuit, current gear selection circuit, voltage limiting protection circuit, voltage gear selection circuit and protection release circuit, the system inputs a power supply of rated voltage through the 10-30V power input interface, and the power supply passes through a current limiting circuit and a voltage limiting protection circuit, and finally outputs power to the equipment load.

[0035] Various working power and reference power of the protection circuit are converted from the power of the power input port through DC / DC, LDO and voltage stabilizing circuit.

[0036] According to the selection of the current gear, the current limiting circuit can control the output of several maximum current values. Of course, the current supplied to the lo...

Embodiment 2

[0050] refer to Figure 1-7 , the power supply protection circuit system of the load equipment, wherein the voltage gear selection circuit can also make the four channels 1Y0 to 1Y3 of the multi-channel electronic switch U16 corresponding to conduction through the selection of the dial switch SW4, respectively corresponding to the acquisition of the load voltage through dynamic conduction The electronic switch of the on-resistance realizes the voltage division, and the voltage division sends the sampling voltage to the following comparison circuit of the current-limiting and voltage-limiting protection circuit in (1) through the 1Z channel of U16, and finally controls the conduction of the MOS transistor Q11 to realize the voltage protection effect;

[0051] In addition, the relay in the current gear selection circuit can be replaced by an electronic switch or MOS tube or other components with a small on-resistance, that is, the current gear selection circuit makes the four el...

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Abstract

The invention relates to the technical field of load power supply protection, and discloses a power supply protection circuit system of load equipment. The power supply protection circuit system comprises a working power supply and reference power supply circuit, a normal work indication and abnormity alarm circuit, a current limiting circuit, a current gear selection circuit, a voltage limiting protection circuit, a voltage gear selection circuit and a protection release circuit. The system inputs a power supply with rated voltage through a 10-30V power supply input interface, and the power supply passes through the current limiting circuit and the voltage limiting protection circuit and finally outputs the power supply to an equipment load; and a working power supply and a reference power supply are formed by converting the power supply of the power supply input port through a DC / DC, an LDO and a voltage stabilizing circuit, and a current limiting circuit can correspondingly control and output multi-gear current values according to the selection of the current gear selection circuit. The voltage of the equipment load is protected due to short circuit of a power supply caused by misoperation or other recoverable faults, operation flexibility and time saving are brought to system engineering, and the protection circuit is high in universality.

Description

technical field [0001] The patent of the present invention relates to the technical field of load power supply protection, in particular, to the power supply protection circuit system of load equipment. Background technique [0002] In recent years, with the development of modern industrial safety and regulatory requirements, measurement and testing equipment such as gas alarms, pressure transmitters, temperature transmitters, flow meters and radar level gauges have been used in metallurgical pharmaceuticals, petrochemicals, new energy, etc. There are more and more applications in the industry. Most of these measuring and testing equipment are connected to the integrated system of the enterprise, such as DCS system, PLC system and GDS system, etc., and the integrated system provides power supply, information collection and control to them. The integrated system is a detection and control system for production information, safety information and linkage devices. It is requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H9/04H02H3/24H02H3/06
CPCH02H9/02H02H9/04H02H3/24H02H3/066
Inventor 刘韦峰欧阳成文方滔
Owner 广东化能智能科技有限责任公司