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Abstract #3092

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

Soheil Taraghinia1, Volkan Acikel2, Reza Babaloo1,3, and Ergin Atalar1,3
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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