DocumentCode :
468450
Title :
A general method for designing the transformer of flyback converters based on nonlinear FEA of electromagnetic field coupled with external circuit
Author :
Chen, Jiaxin ; Guo, Youguang ; Zhu, Jianguo
Author_Institution :
Donghua Univ., Shanghai
fYear :
2007
fDate :
8-11 Oct. 2007
Firstpage :
195
Lastpage :
199
Abstract :
This paper presents a general method for designing the transformer of flyback switching AC-DC converters based on nonlinear finite element analysis (FEA) of electromagnetic field coupled with external circuit. For that, the variation patterns of the PWM duty ratio and the current flowing through the windings of transformer versus the input voltage are introduced first, and then several important principles for the design of the transformer are given by using analytical method. As the magnetic saturation and control delay possess heavy influence on the safety of the operation, a MATLAB/Simulink based simulation model, in which both the nonlinear differential inductance and the control delay are included, is built to predict the converter transient performance. The nonlinear differential inductance is calculated by a general program of nonlinear 2-D FEA in Matlab/Simulink surrounding. By running the model, the performances of the converter with different loads and input voltages are obtained. Simulation results are in good agreement with theoretical analysis.
Keywords :
AC-DC power convertors; PWM power convertors; digital simulation; electromagnetic coupling; finite element analysis; switching convertors; transformers; FEA; MATLAB-Simulink based simulation model; PWM duty ratio; control delay; converter transient performance; electromagnetic field coupling; flyback switching AC-DC converters; magnetic saturation; nonlinear differential inductance; nonlinear finite element analysis; transformer design; Circuit faults; Coupling circuits; Delay; Design methodology; Electromagnetic coupling; Electromagnetic fields; Inductance; Mathematical model; Predictive models; Pulse width modulation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Machines and Systems, 2007. ICEMS. International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-89-86510-07-2
Electronic_ISBN :
978-89-86510-07-2
Type :
conf
Filename :
4411941
Link To Document :
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