Research on Inductive Energy Storage Bipolar Pulse Current Generator

Bipolar pulse current sources are demonstrating superior performance in an increasing number of applications. This article proposes a novel topology for a bipolar pulsed current generator based on inductive energy storage. The system adopts a modular structure, with each module comprising positive and negative sections, and each polarity contains three switches, two diodes, and one inductor. The inductor is charged in series and discharges to the load in parallel, allowing the stored energy to be superimposed onto the load in the form of current. A prototype with five positive and five negative stages was developed, achieving an output current range of 0 to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pm ~40$ </tex-math></inline-formula> A at a charging voltage of 25 V. Under a 1-<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\Omega $ </tex-math></inline-formula> resistive load, the system demonstrates a maximum pulsewidth of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$5~\mu $ </tex-math></inline-formula>s, a minimum rise and fall time of 100 ns, and stable operation at a repetition frequency of 200 Hz. In addition, by adjusting the timing signals, it is possible to achieve multiparameter adjustable pulse current outputs, including different polarities, pulse widths, and intervals between positive and negative pulses. Finally, by analyzing the power consumption of each operational process in the system, the energy efficiency of the system is calculated.