GRADIENT MAGNETIC FIELD POWER SUPPLY APPARATUS, METHOD FOR CONTROLLING THE POWER SUPPLY APPARATUS, AND NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS USING THE POWER SUPPLY APPARATUS

摘要

Disclosed is a gradient magnetic field power supply apparatus wherein switching elements in two bridge circuits are prevented from breaking due to an excess current generated by magnetic saturation of a core, said two bridge circuits supplying power to a gradient magnetic field generating coil, being connected by means of inductors magnetically coupled using the core, and having the same configuration. Also disclosed is an MRI apparatus using such gradient magnetic field power supply apparatus. Current values outputted to the inductors from the two bridge circuits are detected, and on the basis of the detected current values, the difference between the current values is calculated, and on the basis of the calculated difference value, the switching elements in the bridge circuits are controlled.