Patent ID: 9746533
Date: 2017-08-29
CPC Classifications: G01R,H01F,H01H

Claim:
1. A magnetic resonance imaging system comprising a magnet for generating a magnetic field, wherein the magnet is a superconducting magnet, wherein the magnet has a first current lead and a second current lead, wherein the magnetic resonance imaging system further comprise a current ramping system configured for attaching to the first current lead and the second current lead, wherein current ramping system is operable for ramping the current of the superconducting magnet, wherein the magnet further comprises: a vacuum vessel, wherein the first current lead and the second current lead are located on an exterior surface of the magnet and penetrate the vacuum vessel; a magnet circuit for generating the magnetic field, wherein the magnet circuit is within the vacuum vessel; a first magnet circuit connection; a second magnet circuit connection, wherein the first magnet circuit connection and the second magnet circuit connection provide an electrical connection to the magnet circuit for ramping the magnet circuit; a first switch for switching a first electrical connection between the first magnet connection and the first current lead; a second switch for switching a second electrical connection between the second magnet connection and the second current lead; a first current shunt connected across the first switch; a second current shunt connected across the second switch; a first rigid coil loop, wherein the first rigid coil loop is operable to actuate the first switch, wherein the first rigid coil loop forms a portion of the first electrical connection; a second rigid coil loop, wherein the second rigid coil loop is operable to actuate the second switch, wherein the second rigid coil loop forms a portion of the second electrical connection.