Gradient amp response not matching simulation

stockmann-lab / Open_Source_MRI_Tools_MGH

Open source tools developed in the RF Lab at MGH

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Gradient amp response not matching simulation #15

Closed ghost closed 4 years ago

ghost commented 4 years ago

Step response is not accurate

ghost commented 4 years ago

Confirmed that capacitors matched simulation value of 470 pF, and tested a single output channel instead of 2 combined -- no fix

jaystock commented 4 years ago

We found that a 24V supply was inadequate to drive more than ~4.5 amps in the low field scanner gradient coils. One potential solution is to add a second 24V supply in series to provide 50V to drive more current and also help handle the high inductances for rapid slewing.

jaystock commented 4 years ago

One option for powering buffers would be to use a standard +/-15V regulator to power the INA105s.

ghost commented 4 years ago

Splitting off comments to a different issue