MRI GRADIENT POWER SYSTEM WITH ADD ON ENERGY BUFFER

摘要

The present invention relates to a power supply system (311) for supplying current to a gradient coil (303) of a magnetic resonance imaging system (100), the power supply system (311) comprising: an electrical power supply (309) to supply a first voltage to a gradient amplifier (307) for driving the gradient coil, the gradient amplifier output being connected to the gradient coil (303); an energy buffer having an input connected to the electrical power supply (309), the energy buffer being configured to supply a second voltage to the gradient amplifier (307), the energy buffer being in parallel to the gradient amplifier (307) and the electrical power supply (309), the energy buffer comprising a voltage converter (313) configured to control the second voltage as to compensate for a variation in the first voltage resulting from the driving of the gradient coil (303).