FPGA-based solid-state power controller inverse time over-current protection device

Abstract

The invention discloses an FPGA-based solid-state power controller inverse time over-current protection device, mainly solving the problems that the existing time over-current protection device is poor in reliability, high in power consumption, low in accuracy and poor in strong electromagnetic interference resistance. In the invention, a clock management module, a multiple data register group module, an FSM control module, an inverse time over-current protection module and an output control module are arranged in the interior of FPGA; wherein the multiple data register group module receives an FSM control module address signal and outputs data to the FSM control module which judges the data, the judged data enters the inverse time over-current protection module, result calculated by the inverse time over-current protection module is returned to the FSM control module which compares the returned data, the comparison result is sent to the output control module which outputs a control signal to an outside circuit, and the clock management module provides a system clock for all modules. The invention has the advantages of high accuracy, strong reliability, strong electromagnetic interference resistance, low power consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits and relates to solid-state power control, in particular to an inverse time overcurrent protection system, which can be used in industrial monitoring, electronic load protection, aircraft, aerospace and other fields. Background technique [0002] The solid-state power controller is a circuit load monitoring system based on semiconductors. It collects current data from the circuit load, and then judges whether the load is working normally according to the current value. When it detects that the current flowing through the load is greater than a certain fixed rated value, it will delay and shut down the load according to the current value, so as to avoid the load being damaged due to overcurrent and realize inverse time limit control. [0003] Currently, there are two inverse time protection methods for solid-state power controllers: [0004] The first prior art is the inverse time contr...

AI Technical Summary

Problems solved by technology

Since the inverse time control of this method is determined by the resistance and capacitance values, there are disadvantages: low precision, poor reliability, large power consumption, etc., which limits its application;

For example, the patent No. 200420071350 proposed by Guangdong Kelon Electric Co., Ltd. is a single-chip system power-off protection circuit, which is realized based on this method. The disadvantages of this method are: the stability is not high enough, the precision is not high enough, and the flexibility is poor , the anti-electromagnetic interference performance is relatively poor

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