Calculation of railgun inductance gradient by 2-D finite element method

Author

Liu, Shoubao ; Ruan, Jiangjun ; Du, Zhiye ; Wang, Dong ; Zhao, Chun

Author_Institution

Sch. of Electr. Eng., Wuhan Univ., Wuhan

fYear

2008

fDate

17-20 Oct. 2008

Firstpage

4057

Lastpage

4060

Abstract

Inductance gradient has great influence on the performance of railgun. This paper deduced armaturepsilas force formulation, explained inductance gradientpsilas physical meaning, introduced the governing equation of 2-D time harmonic electromagnetic field, built railgunpsilas 2-D finite element model; a common structure railgunpsilas inductance gradient is calculated. The influence of time harmonic frequency and railpsilas dimensions on inductance gradient is investigated; distribution of rail current and spatial energy under varied influencing factors is displayed. The suggested method is verified by comparing the results with those in reference. According to the analysis results, optimal design of railgun is suggested.

Keywords

electromagnetic fields; finite element analysis; harmonic analysis; inductance; railguns; 2D finite element method; 2D time harmonic electromagnetic field; armature force formulation; railgun inductance gradient; spatial energy; time harmonic frequency; Acceleration; Equations; Finite element methods; Frequency; Inductance measurement; Lorentz covariance; Magnetic circuits; Performance analysis; Railguns; Rails;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-3826-6

Electronic_ISBN

978-7-5062-9221-4

Type

conf

Filename

4771494