Method and system for gradient power amplifier debugging

A gradient power amplifier, comprising:

• a control unit, comprising a close-loop control sub-unit and a feedforward control sub-unit;
• an initialization unit configured to initialize the control unit with default parameters, wherein the default parameters comprises default load parameter;
• a data retrieval unit configured to retrieve a characteristic output of the close-loop control sub-unit, the characteristic output representing differences between the default load parameters and real load parameters;
• a load parameter identification unit, configured to compute the real load parameters according to the characteristic output;
• and
• a control parameter adjustment unit, configured to adjust the one or more control parameters of the control unit according to the computed real load parameter.

A magnetic resonance system comprising:

• a gradient coil configured to generate a gradient magnetic field;
• a gradient power amplifier configured to drive the gradient coil;
• a processor comprising:
• a close-loop control sub-unit configured to produce a characteristic output based on an input signal and an output signal of the gradient power amplifier;
• a feedforward control sub-unit including a load model with load parameters related to the gradient coil;
• and
• a storage unit configured to store executable instructions which, when executed by the processor, causes the processor to implement:
• retrieving a characteristic output of the close-loop control sub-unit, the characteristic output represents differences of between the default load parameters and the real load parameters;
• computing the real load parameters according to the characteristic output of the close-loop control sub-unit;
• and
• adjusting one or more control parameters of the control unit according to the real load parameter.