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    System and method for automatic tuning of a magnetic field generator
    3.
    发明公开
    System and method for automatic tuning of a magnetic field generator 有权
    Anordnung und Methode zum automatischen Abstimmen eines Magnetfeldgenerators

    公开(公告)号：EP1703638A1

    公开(公告)日：2006-09-20

    申请号：EP06251351.0

    申请日：2006-03-14

    申请人： Alfred E. Mann Foundation for Scientific Research ,  Schulman, Joseph H.

    发明人： Schulman, Joseph H ,  Lewis, Dale A ,  Hancock, Donald J ,  Vogel, Martin A

    IPC分类号： H03J5/02 ,  A61N1/378 ,  H03L5/02

    CPC分类号： A61N1/3787 ,  A61N1/37229 ,  H03J5/02 ,  H03J2200/10 ,  H03L5/02

    摘要： An automatic tuning system for a magnetic field generating tuned circuit includes a processor configured to maintain the resonant frequency of a tuned circuit equal to a reference frequency. The tuned circuit is driven by a power amplifier whose output provides an amplified signal at the reference frequency. The tuned circuit includes a magnetic field generating inductor and a bank of individually switchable capacitors controlled by the processor capable of adding and removing the respective capacitances to and from the tuned circuit. The inductor includes a Faraday shield to shield the tuned circuit from the influence of electric fields. In an embodiment of the invention, the variable capacitor is in the form of a diode variable capacitor (varicap) in parallel circuit relationship with the tuned circuit capacitor and the inductor. In an alternate embodiment the inductor and a fixed capacitor are in series circuit relationship with the varicap in parallel circuit relationship with the fixed capacitor and the tuning sequence relies on a phase locked loop using the phase of a reference frequency signal and the phase of the inductor voltage as control parameters.

    摘要翻译： 用于磁场产生调谐电路的自动调谐系统包括被配置为将调谐电路的谐振频率保持为等于参考频率的处理器。 调谐电路由功率放大器驱动，输出端以参考频率提供放大信号。 调谐电路包括磁场产生电感器和由处理器控制的能够向调谐电路和从调谐电路移除相应电容的单独可切换电容器组。 电感器包括一个法拉第屏蔽，用于屏蔽调谐电路免受电场的影响。 在本发明的一个实施例中，可变电容器是与调谐电路电容器和电感器并联电路的二极管可变电容器（变容二极管）的形式。 在替代实施例中，电感器和固定电容器与变容二极管的串联电路与固定电容器并联电路的关系，并且调谐序列依赖于使用参考频率信号的相位和电感器的相位的锁相环 电压作为控制参数。