Precision gradient amplifier with multiple output voltage levels
    1.
    发明授权
    Precision gradient amplifier with multiple output voltage levels 失效
    具有多个输出电压电平的精度梯度放大器

    公开(公告)号:US07253625B2

    公开(公告)日:2007-08-07

    申请号:US10544355

    申请日:2004-01-22

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3852

    摘要: A controlled power supply (201, 222) drives a magnetic field gradient coil (161) of a magnetic resonance imaging apparatus (10). A gradient amplifier (201) includes a plurality of switching power regulators (50, 52, 54, 56) which are electrically connected in series. A bipolar circuit (70) receives power from the series connected switching power regulators (50, 52, 54, 56) and delivers the power at a selected polarity to the gradient coil (161). A control circuit (221) delivers phase staggered pulse width modulated control signals (A, B, C, D) to the switching power regulators (50, 52, 54, 56).

    摘要翻译: 受控电源(20 1,22 2)驱动磁共振成像设备(10)的磁场梯度线圈(16 1 1) )。 梯度放大器(20I 1)包括串联电连接的多个开关功率调节器(50,52,54,56)。 双极电路(70)从串联连接的开关功率调节器(50,52,54,56)接收功率,并将所选极性的功率输送到梯度线圈(16S1)。 控制电路(22 1)将相位交错的脉宽调制控制信号(A,B,C,D)传送到开关功率调节器(50,52,54,56)。