|Table of Contents|

Study on Modeling of Silicon Carbide MOSFET Based on Levenberg-Marquardt Algorithm(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年03期
Page:
30-37
Research Field:
电气工程
Publishing date:

Info

Title:
Study on Modeling of Silicon Carbide MOSFET Based on Levenberg-Marquardt Algorithm
Author(s):
Zhao Yixin1; 2; Liu Shoucheng1; 2; Yan Wei1; 2; Zhu Zhibo1; 2; Ju Ming1; 2
(1.NARI School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210023,China)(2.Jiangsu Electrical Equipment EMC Engineering Laboratory,Nanjing Normal University,Nanjing 210023,China)
Keywords:
Silicon Carbide MOSFET; static characteristic modeling; dynamic behavior model; parasitic nonlinear capacitance; Levenberg-Marquardt algorithm
PACS:
TM23
DOI:
10.3969/j.issn.1672-1292.2022.03.005
Abstract:
In order to predict and analyze the switching behavior of silicon carbide MOSFET power devices more quickly and accurately,it is necessary to establish static and dynamic behavior models. The static model includes the transfer characteristic curves and the output characteristic curves at different temperatures,as well as the parasitic nonlinear capacitance curves. In this paper,an improved curve fitting formula based on the EKV formula and a new nonlinear capacitor fitting formula is proposed. The Macquart method is used for parameter fitting,which has faster modeling speed and smaller model errors. Non-ideal conditions are considered in the dynamic model,such as package parasitic inductance and parasitic nonlinear capacitance,and establishes the gate-source voltage,drain-source voltage,Schottky diode voltage,and drain current at each stage of the device turn-on and turn-off process. The differential equations of the circuit and the drain current,and then the state variables at the end of each stage are used as the initial conditions for the next stage. The fourth-order Runge-Kutta method is used to solve the numerical solution of the above-mentioned differential equations,and compared with the LTspice simulation waveform,the results show that the above-mentioned modeling method can describe the dynamic behavior of the device well.

References:

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Last Update: 2022-09-15