Title :
Simulation of 3-Staged MPC Using Custom Characteristics of Magnetic Cores
Author :
Choi, Jaegu ; Namihira, Takao ; Sakugawa, Takashi ; Katsuki, Sunao ; Akiyama, Hidenori
Author_Institution :
Kumamoto Univ., Kumamoto
Abstract :
A low inductance circuit has been fabricated in order to obtain shorter time to saturation during core unsaturation and current pulses with shorter widths during core saturation. B-H curves have been derived from the measured voltage and current waveforms. Characteristics of the magnetic core for pulsed-power generators have been investigated and the Electromagnetic Transient Program (EMTP) simulation has been carried out in order to determine the effects of leakage current on the energy efficiency of a 3-staged magnetic pulse compressor (MPC). As results, the derived B-H curves show the following characteristics: a high ratio of unsaturated to saturated permeability (muun/musat), a maximum flux swing of about 2.55 T, a high ratio of remanent flux density to saturation magnetic flux density (Br/Bs) and low core loss. And, it is found that muun increases with time to saturation and that musat is strongly influenced by the stray inductances of the core. By applying custom characteristics to each stage in EMTP simulation, more practical energy transfer in MPC is obtained.
Keywords :
EMTP; inductance; leakage currents; magnetic cores; pulse generators; 3-staged magnetic pulse compressor; B-H curves; Electromagnetic Transient Program simulation; energy efficiency; leakage current; low inductance circuit; magnetic cores; maximum flux swing; pulsed-power generators; remanent flux density; saturation magnetic flux density; Circuit simulation; EMTP; Electromagnetic transients; Inductance; Magnetic cores; Magnetic materials; Photonic crystals; Pulse circuits; Pulse compression methods; Space vector pulse width modulation;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2007.4286543