发明名称 |
Active shield superconducting electromagnet apparatus for MRI with improved quench protection |
摘要 |
The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which a superconducting fault current limiter and a second superconducting persistent current switch are connected in series, are connected in parallel to a series circuit of the first main coil and the second main coil; a first closed circuit in which at least one of the first main coil and the first shield coil, and a first quench protection circuit are connected in series; and a second closed circuit in which one of the second main coil and the second shield coil, and a second quench protection circuit are connected in series. |
申请公布号 |
EP2026083(A2) |
申请公布日期 |
2009.02.18 |
申请号 |
EP20080252646 |
申请日期 |
2008.08.07 |
申请人 |
HITACHI LTD. |
发明人 |
HIGUCHI, YOSHIYA;ABE, MITSUSHI;ANDO, RYUYA;YAMAMOTO, TSUTOMU;HONDA, TAKURO |
分类号 |
G01R33/3815;G01R33/28;G01R33/38;G01R33/421;H01F6/02;H02H7/00 |
主分类号 |
G01R33/3815 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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