发明名称 |
Power supply for an inductive user, particularly a gradient coil |
摘要 |
Exactly defined current pulses having high edge steepness and high final value are required for the pulse-like generation of high magnetic fields in inductive users. Particularly in nuclear magnetic resonance tomography, such pulses serve the purpose of building up a topically variable magnetic field with an optimally linear field strength gradient. A power supply for generating such current pulses includes a series connection of a stepping voltage switch and a variable voltage source, whose resultant output voltage is applied to the inductive by a voltage commutator user with a suitable operational sign for the build-up or dismantling of the individual pulses. A switching and regulating circuit controls the stepping switch, the variable voltage source and the voltage commutator dependent on prescribed rated curves of the pulses, such that the pulses have a rise and decay time independent of the final value.
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申请公布号 |
US4733342(A) |
申请公布日期 |
1988.03.22 |
申请号 |
US19870057326 |
申请日期 |
1987.06.04 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
MUELLER, ALBERT;NEUFFER, INGEMAR |
分类号 |
G01R33/385;H02M5/458;H02M7/48;(IPC1-7):H02M7/538 |
主分类号 |
G01R33/385 |
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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