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

Autor: Memarian Sorkhabi M; MRC Brain Network Dynamics Unit, University of Oxford, Oxford, OX1 3TH UK., Wendt K; MRC Brain Network Dynamics Unit, University of Oxford, Oxford, OX1 3TH UK., Rogers D; Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ UK., Denison T; MRC Brain Network Dynamics Unit, University of Oxford, Oxford, OX1 3TH UK.; Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ UK.
Jazyk: angličtina
Zdroj: SN applied sciences [SN Appl Sci] 2021; Vol. 3 (4), pp. 406. Date of Electronic Publication: 2021 Mar 02.
DOI: 10.1007/s42452-021-04420-y
Abstrakt: 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.
Competing Interests: Conflict of interestOn behalf of all authors, the corresponding author states that there is no conflict of interest.
(© The Author(s) 2021.)
Databáze: MEDLINE
Externí odkaz: