Matlab model and construction method that can simulate the actual characteristics of thyristor

Abstract

The invention provides an MATLAB model capable of simulating actual characteristics of a thyristor and a construction method. The structure comprises an original thyristor model in an MATLAB, a signal control module, an enabling system module and a follow current module; on the basis of the thyristor model in the MATLAB, a current value is acquired and subjected to logic calculation through the signal control module and is used as an input signal and an enabling control signal of the enabling system module; and an output signal is used for controlling the follow current module through comparative calculation of the enabling system module, so that a follow-current current of the thyristor is generated. On the basis, voltage and current in the model are measured, and four ports a, k, g and m of the model are defined again to form a newly-established thyristor model. The MATLAB model has the advantages that a reverse recovery curve of the current in the thyristor can be reflected, and an ideal defect that a current curve in the thyristor model in the MATLAB is suddenly stopped is compensated, so that the actual characteristics of the thyristor are represented and the application value is relatively high.

Description

technical field [0001] The invention relates to a MATLAB model capable of simulating the actual characteristics of a thyristor and a construction method. Background technique [0002] The volt-ampere characteristic curve of a thyristor with practical characteristics such as Picture 1-1 What the first quadrant in represents is its forward characteristic, what the third quadrant represents is its reverse characteristic. when , if a forward voltage is applied across the thyristor, it will not conduct. If the forward voltage continues to increase until its value exceeds the breakover voltage , it turns on. Depend on Picture 1-1 It can be seen that with gradually increased, Gradually decreases. If a reverse voltage is applied to both ends of the thyristor, it will be turned off. If the reverse voltage continues to increase, when the reverse breakdown voltage is reached, the reverse current will increase rapidly. If it is not limited in time, it will make it Fever or ...

AI Technical Summary

Problems solved by technology

Since the original thyristor model in MATLAB only has forward characteristics, when a reverse voltage is applied across it, its current value is directly cut off to 0, which does not meet the current reverse recovery characteristics when the thyristor is normally turned off.

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