公开(公告)号：US6140873A

公开(公告)日：2000-10-31

申请号：US362464

申请日：1999-07-28

申请人： Wilhelmus D.H. Van Groningen

发明人： Wilhelmus D.H. Van Groningen

IPC分类号： A61B5/055 ,  G01R33/381 ,  G01R33/385 ,  H02M7/48 ,  H02M7/487 ,  H03F3/217 ,  H03K17/10 ,  H03K17/12 ,  H02M7/5387 ,  H03F3/38 ,  H03F21/00

CPC分类号： H02M7/487 ,  H02M2007/4811

摘要： A power amplifier for delivering large currents as well as high voltages of the order of some hundreds of amperes and 1000 or more volts, notably for MRI. The amplifier is constructed as a multilevel inverter in order to comply with the requirement of high voltages while utilizing transistors capable of withstanding lower voltages only. The amplifier is arranged for soft switching, so that the switching losses at said large currents are limited.

摘要翻译： 一种功率放大器，用于输送大电流以及大约数百安培和1000或更高电压的高电压，特别是用于MRI。 放大器被构造为多电平逆变器，以便符合高电压的要求，同时利用只能承受较低电压的晶体管。 放大器被布置用于软开关，使得在所述大电流下的开关损耗受到限制。