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. Author manuscript; available in PMC: 2023 Jul 2.
Published in final edited form as: J Neural Eng. 2022 Apr 12;19(2):10.1088/1741-2552/ac60c9. doi: 10.1088/1741-2552/ac60c9

Figure 2.

Figure 2

The overall diagram of the proposed two-channel TMS system, which is built by cascading two full H-bridges in each coil channel. Key components of the proposed pulse generator: DC links include two isolated step-up transformers (custom manufactured, secondary voltage (RMS): 570 Vac, 5.7 kW, class-E insulation, Eastern Transformers, UK), two full-bridge diode rectifiers (STTH9012TV1, STMicroelectronics). Pulse capacitors consist of a series of two capacitors (10000 μF, 500 VDC, ALS70A103NT500, KEMET Electronics, EU), a total of 8 capacitors. The full H-bridges are built with three IGBTs in parallel, for a total of 6 modules per H-bridge and 2 H-bridges per channel. Generation of trigger pulses for IGBTs and modulation index changes are done by a digital controller (Micro Lab Box, Dual Core 2 GHz processor, DS1202, DS1302 I/O, dSPACE, Germany).