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Abstract #4243

Radiated Noise Reduction for a Gradient Driver with SiC MOSFETs using Double Shielding

Juan Sabate1, Huan Hu1, Ruxi Wang2, and Logan Snow1
1GE Global Research, Niskayuna, NY, United States, 2GE Aviation, Dayton, OH, United States

The gradient driver was implemented with SiC MOSFETs. The amplifier has less losses and is more compact, however switching has higher high frequency contents. The new amplifier was tested in an EMI shielded room. The results show the effectiveness of the double shielding method at reducing the radiated noise generated by a gradient driver system. The tests confirmed the correlation between the conducted and radiated noise. The double shielding method proposed reduced the radiated noise caused by the CM circulating current between cables. The measurements showed up to 35dB radiated noise reduction with this method.

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