A Repetitive Bipolar Pulsed Power Generator Based on Switched-Capacitor Concept

Document Type : Research Note

Authors

1 Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran

2 Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran

3 Faculty of Electrical and Computer Engineering, Shahid Sattari University of Aeronautical Engineering, Iran

Abstract

This paper presents a pulsed-power generator that can produce a high voltage bipolar pulse from a relatively low-voltage input source, based on the switched-capacitor concept. The circuit boosts the input voltage by storing energy in several capacitors in a predefined pattern and simultaneously releasing it to the load. It is worth noting that the structure can short-circuit its output terminal while charging the capacitors without using any switches across the load. This topology is mainly suitable for applications requiring a high voltage pulse and only having access to low voltage input sources. Moreover, thee structure can generate a combination of wide and narrow pulses by alteranting its output voltage between two different values. Precise calculation and employment of capacitors ensure that the structure can properly generate the intended output pulses with an acceptable ever-so-slight voltage drop. Finally, MATLAB Simulink was used to evaluate the circuit’s operation, and experimental tests were conducted on a laboratory setup, where the results confirmed the proper performance of the circuit.

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