An overcurrent detector with master-slave multi-machine communication function based on cpld

A communication function and detector technology, which is applied in the field of overcurrent detectors with master-slave multi-machine communication function, can solve the problems that the overcurrent detection circuit does not have networking capability and remote monitorability, etc., and achieves a reduction in size. , enhance the flexibility, the effect of rich logic resources

Active Publication Date: 2016-07-13
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a complex programmable logic device CPLD based on a complex programmable logic device with master-slave Overcurrent detector with multi-machine communication function

Method used

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  • An overcurrent detector with master-slave multi-machine communication function based on cpld
  • An overcurrent detector with master-slave multi-machine communication function based on cpld

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Embodiment Construction

[0021] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] An overcurrent detector with master-slave multi-computer communication function based on CPLD is characterized in that: the communication mode and communication protocol are stipulated, and the communication circuit is designed by CPLD, including a digital-to-analog converter, an analog comparator, a current sensor, a voltage-frequency Converters, optical fiber receivers, optical fiber transmitters and other devices realize overcurrent detection, alarm and real-time monitoring of protection values;

[0023] Such as figure 1 As shown, the host and the overcurrent detector constitute a master-slave multi-machine communication network, in which the host sends a data block consisting of a start frame→address frame→data frame; the fiber optic transceiver box is used for the communication bridge between the host and the overcurrent detector...

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Abstract

The invention relates to the overcurrent protection of electrical systems and equipment, and is especially suitable for the networked management of overcurrent protection in large-scale experimental systems. flow detector. The present invention is an overcurrent detector based on CPLD with master-slave multi-computer communication function, stipulates communication mode and communication protocol, adopts CPLD-complex programmable logic device to design communication circuit, including digital-to-analog converter, analog comparator, current Sensors, voltage-frequency converters, optical fiber receivers, optical fiber transmitters and other devices realize data communication, over-current detection, alarm and protection value real-time monitoring; they can be used to build a master-slave multi-machine communication system, and the number of over-current detectors can be expanded to 255, suitable for network management of overcurrent protection in large-scale experimental systems; using voltage-frequency conversion technology, the current protection settings can be returned to the monitoring system for real-time monitoring.

Description

technical field [0001] The invention relates to the overcurrent protection of electrical systems and equipment, and is especially suitable for the networked management of overcurrent protection in large-scale experimental systems. flow detector. Background technique [0002] When the current flowing through the power supply equipment or the circuit of the electrical equipment exceeds the maximum value it can withstand, it will cause damage to the equipment, so that the system cannot work normally. Therefore, overcurrent detection and protection is an important link to ensure the safe operation of the system. At present, most overcurrent detection circuits are only designed for specific equipment, neither have remote monitorability nor networking capabilities, and cannot meet the needs of large-scale experimental system protection based on network management. [0003] Large-scale experimental systems usually have multiple circuits and multiple power supply / consuming devices...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01R19/25
Inventor卜英南李波康自华
OwnerSOUTHWESTERN INST OF PHYSICS