Here you can find the schematics for the gradient amplifier used for 50 mT MRI scanner at the LUMC. The gradient amplifier was developed by Danny de Gans and colleagues at the Electronics and Mechanical support division (DEMO) at the technical university Delft (TU Delft)
LUMC-LowFieldMRI/GradientAmplifier
Here you can find the schematics for the gradient amplifier used for 50 mT MRI scanner at the LUMC