Characteristics of Magnetic Core in Magnetic Pulse Compression System

Abstract

In order to obtain the characteristics of magnetic core under ≈ 0.5-5 µs saturation time, a one-stage magnetic pulse compression circuit without external demagnetization circuits which are commonly used in magnetic compressors is designed. The current through the core is calculated by voltage across the resistive load, and the loop voltage is picked up with a single wire loop and integrated by software. B-H curves are derived from the measured voltage and current wave forms. B-H curves show that the core loss is in inverse proportion to the time to saturation, whereas the percentile core loss decreases as the charging energy increases. While the eddy current loss and dissipated energy are in direct proportion to dB/dt. The low inductance of magnetic switch indicates that the core is saturated and behaves as an air core. By applying custom characteristics to each stage in Pspice simulation, more practical energy transfer in magnetic pulse compression and the effects of leakage current are presented.

Excitation of atmospheric pressure uniform dielectric barrier discharge using repetitive unipolar nanosecond-pulse generator

“…This equipment can provide repetitive high-voltage pulses of up to 30 kV with a rise time of 40 ns and a full pulse width at half maximum of 70 ns. Figure 1 is a schematic circuit diagram of the pulsed power generator which consists of two units: low-voltage unit and high-voltage unit [39][40][41]. The former produces a resonant charging function and an IGBT provides the primary switch.…”

High voltage pulse generation using magnetic pulse compression

“…The shape of the magnetization curve is unfortunately negatively affected while decreasing the magnetization pulse length, which leads to increased core losses and the quality of pulse compression further decreases. As shown in [5], magnetic core losses (FINEMET core, K101, Liyuan Metal Corp., China) can achieve six times higher values for short magnetization pulses (0.5 µs) than for longer magnetization pulses (4.5 µs).…”