Work

Paralleling insulated-gate bipolar transistors in the H-bridge structure to reduce current stress

Year: 2021

Type: article

Abstract: In this study we present the new power electronic circuit implementation to create the arbitrary near-rectangular electromagnetic pulse. To this end, we develop a parallel- Insulated-gate bipolar transistors (IGBT)-based magnetic pulse generator utilizing the H-bridge architecture. This approach effectively reduces the current stress on the power switches while maintaining a simple structure using a single DC source and energy storage capacitor. Experimental results from the circuit characterization show that the proposed circuit is capable of repeatedly generating near-rectangular magnetic pulses and enables the generation of configurable and stable magnetic pulses without causing excessive device stresses. The introduced device enables the production of near-rectangular pulse trains for modulated magnetic stimuli. The maximum positive pulse width in the proposed neurostimulator is up to 600 µs, which is adjustable by the operator at the step resolution of 10 µs. The maximum transferred energy to the treatment coil was measured to be 100.4 J. The proposed transcranial magnetic stimulator (TMS) device enables more flexible magnetic stimulus shaping by H-bridge architecture and parallel IGBTs, which can effectively mitigate the current stress on power switches for repetitive treatment protocols. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s42452-021-04420-y.

Source: SN Applied Sciences

DOI: 10.1007/s42452-021-04420-y

Authors: Majid Memarian Sorkhabi, Karen Wendt, Daniel Rogers, Timothy Denison

Institutions: University of Oxford, Brain Network Dynamics Unit

Language: English

Topic: Pulsed Power Technology Applications

Subfield: Control and Systems Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,690