이방성 영구자석 제조를 위한 공심형 솔레노이드 코일을 이용한 임펄스 방전 전류 생성에 관한 연구 = A Study on the Generation of Impulse Discharge Current Using an Air-Cored Solenoid Coil for Manufacturing Anisotropic Permanent Magnets

다국어 초록 (Multilingual Abstract)

In this paper, an analytical solution for the discharge current in the form of an impulse generated in an air-cored solenoid coil connected to a discharge circuit composed of a high-voltage capacitor, thyristor, and freewheeling diode was derived from equivalent models of RLC and RL series circuits. It was confirmed that the form of discharge current showed three different forms according to the combination of capacitance of capacitor, inductance and resistance of coil, and the expression for discharge current in the most general case was derived as a closed function of the main variables. Finally, by using the expression for the discharge current, expressions for three physical properties: the maximum value of the discharge current that can represent the characteristics of the discharge current, its arrival time, and the full discharge time of the capacitor were derived. The validity of the proposed equations was performed through comparison with CAE analysis results for discharge circuits with specific specifications.