Abstract #3092

Design and Implementation of High Switching Frequency Gradient Power Amplifier Using eGaN Devices

Soheil Taraghinia¹, Volkan Acikel², Reza Babaloo^1,3, and Ergin Atalar^1,3

¹UMRAM, Bilkent University, Ankara, Turkey, ²Aselsan A.S., Ankara, Turkey, ³Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey

In this work, a switching H-bridge gradient power amplifier utilizing eGaN devices is implemented. A single-stage 150 V/ 50 A full-bridge GPA for an insert gradient array system at 1 MHz effective switching frequency is fabricated and tested. Pulse width modulation signals are generated digitally using a Virtex 7 family FPGA board. A single-stage LC low pass filter is designed to attenuate the ripple current.

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