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21 条记录 (耗时 0.012 秒)

    Radiofrequency amplifier impedance optimization
    2.
    发明公开
    Radiofrequency amplifier impedance optimization 审中-公开
    Funkfrequenzverstärker-Impedanzoptimierung

    公开(公告)号：EP2862532A2

    公开(公告)日：2015-04-22

    申请号：EP14185719.3

    申请日：2014-09-22

    申请人： Covidien LP

    发明人： Johnson, Joshua H. ,  Gilbert, James A.

    IPC分类号： A61B18/12 ,  H02M7/5387 ,  H02M7/48

    CPC分类号： A61B18/1206 ,  A61B2018/00732 ,  A61B2018/00875 ,  H02M7/53871 ,  H02M2007/4815 ,  Y02B70/1441

    摘要： The present disclosure is directed to an electrosurgical generator (100) including a resonant inverter (102) having an H-bridge (104) and a tank (106). The generator also includes a pulse width modulation (PWM) controller (110) configured to output PWM timing signals to the H-bridge (104). A switch (134) is configured to select a modality from among a plurality of modalities and the PWM controller (110) adjusts a frequency of the PWM timing signals based on the selected modality.

    摘要翻译： 本公开涉及包括具有H桥（104）和罐（106）的谐振逆变器（102）的电外科发生器（100）。 发生器还包括被配置为向H桥（104）输出PWM定时信号的脉宽调制（PWM）控制器（110）。 开关（134）被配置为从多个模态中选择模态，并且PWM控制器（110）基于所选择的模态来调整PWM定时信号的频率。

    Crest-factor control of phase-shifted inverter
    4.
    发明授权
    Crest-factor control of phase-shifted inverter 有权
    移相逆变器的峰值因数控制

    公开(公告)号：EP2777577B1

    公开(公告)日：2018-05-16

    申请号：EP14156761.0

    申请日：2014-02-26

    申请人： Covidien LP

    发明人： Johnson, Joshua H.

    IPC分类号： A61B18/12 ,  A61B18/00

    CPC分类号： A61B18/1206 ,  A61B18/18 ,  A61B2018/00726 ,  A61B2018/00892 ,  A61B2018/1286

    摘要： A method for controlling an electrosurgical generator includes generating at least one electrosurgical waveform at a selected energy setting through an RF output stage comprising an RF inverter coupled to a power source. The at least one electrosurgical waveform has a duty cycle and a crest factor. The method also includes adjusting a repetition rate of the at least one electrosurgical waveform based on the selected energy setting to regulate the duty cycle of the at least one electrosurgical waveform. The method also includes applying the at least one electrosurgical waveform to tissue through at least one electrode and measuring an output voltage of the at least one electrosurgical waveform. The method also includes supplying a control signal to the RF inverter based on the repetition rate when the output voltage is increasing to regulate the crest factor of the at least one electrosurgical waveform.

    Constant power inverter with crest factor control
    6.
    发明授权
    Constant power inverter with crest factor control 有权
    恒定逆变器与波峰因数控制

    公开(公告)号：EP2777578B1

    公开(公告)日：2016-08-03

    申请号：EP14158040.7

    申请日：2014-03-06

    申请人： Covidien LP

    发明人： Johnson, Joshua H. ,  Tonn, Donald

    IPC分类号： A61B18/12

    CPC分类号： H02M7/5395 ,  A61B18/1206 ,  A61B18/1402 ,  A61B18/1445 ,  A61B2018/00702 ,  A61B2018/0072 ,  A61B2018/00767 ,  A61B2018/165 ,  H02M2001/007

    摘要： An electrosurgical generator is provided. The generator includes a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element operated at a first duty cycle; a DC-AC boost converter coupled to the DC-DC buck converter and including at least one second switching element operated at a second duty cycle, the DC-AC boost converter configured to convert the DC waveform to generate at least one electrosurgical waveform; and a controller coupled to the DC-DC buck converter and the DC-AC boost converter and configured to adjust the first duty cycle and the second duty cycle to operate the at least one electrosurgical waveform in at least one of constant current, constant voltage, or constant power modes.

    Systems and methods for generating electrosurgical energy using a multistage power converter
    7.
    发明公开
    Systems and methods for generating electrosurgical energy using a multistage power converter 审中-公开
    用于使用多级功率变换器生成电外科能量的系统和方法

    公开(公告)号：EP2829248A1

    公开(公告)日：2015-01-28

    申请号：EP14178300.1

    申请日：2014-07-24

    申请人： Covidien LP

    发明人： Johnson, Joshua H.

    IPC分类号： A61B18/12

    CPC分类号： A61B18/1206 ,  A61B2018/00666 ,  A61B2018/00702 ,  A61B2018/0072 ,  A61B2018/00767 ,  A61B2018/00827 ,  A61B2018/00875 ,  A61B2018/00892 ,  A61B2018/1286

    摘要： The electrosurgical systems and methods according to the present disclosure use a multistage power converter for generating electrosurgical energy. The electrosurgical systems include an electrosurgical generator having a power converter coupled to an electrical energy source and configured to generate electrosurgical energy. The power converter includes a boost converter configured to convert a first direct current from the electrical energy source to a second direct current, and a phase-shifted pulse width modulation (PS-PWM) resonant inverter configured to invert the second direct current to an alternating current. The electrosurgical generator also includes a plurality of sensors configured to sense a voltage and a current of the generated electrosurgical energy and a controller coupled to the power converter and the plurality of sensors. The controller includes a signal processor configured to determine tissue impedance based on the sensed voltage and current, and an output controller configured to select one of a plurality of output characteristics based on the determined tissue impedance, and to generate control signals to control the boost converter and the PS-PWM resonant inverter, according to the selected output characteristic.

    摘要翻译： 电外科系统和方法雅丁本发明使用用于产生电外科能量的多级功率变换器。 该电外科系统包括具有耦合到在电能量源并且被配置为产生电外科能量的功率转换器的电外科发生器。 功率转换器包括被配置为将第一直流电流从电能源转换为第二直流电升压转换器，和一个相移的脉冲宽度调制（PS-PWM）配置成反转所述第二直流电流在交替的谐振逆变器 电流。 因此，该电外科发生器包括被配置为感测电压和所产生的电外科能量的电流和耦合到所述功率转换器的控制器和传感器的多个传感器的多个的情况。 该控制器包括被配置为基于所感测的电压和电流的确定性矿组织阻抗的信号处理器，以及配置为选择的基础上确定的开采组织阻抗输出特性的多个中的一个，并产生控制信号以控制所述升压转换器输出控制器 和PS-PWM谐振逆变器，gemäß到所选择的输出特性。

    System and method for power control of electrosurgical resonant inverters
    8.
    发明公开
    System and method for power control of electrosurgical resonant inverters 审中-公开
    系统与Verfahren zur Leistungsregelung eines elektrochirurgischen resonanceen Wechselrichters

    公开(公告)号：EP2777582A1

    公开(公告)日：2014-09-17

    申请号：EP14159839.1

    申请日：2014-03-14

    申请人： Covidien LP

    发明人： Gilbert, James A. ,  Johnson, Joshua H. ,  Larson, Eric J. ,  Roberts, Brian L. ,  Van Slyke, Braddon M.

    IPC分类号： A61B18/12 ,  H02M7/5387 ,  A61B18/00

    CPC分类号： A61B18/18 ,  A61B18/1206 ,  A61B18/1815 ,  A61B2018/00678 ,  A61B2018/00702 ,  A61B2018/00827 ,  A61B2018/00892 ,  A61B2018/1213 ,  A61B2018/1286 ,  H02M7/53871 ,  H02M2007/4815 ,  Y02B70/1441

    摘要： An electrosurgical generator is disclosed. The generator includes an RF output stage configured to generate at least one electrosurgical waveform including a plurality of cycles; at least one sensor coupled to the RF output stage, the at least one sensor configured to measure a voltage and a current of the at least one electrosurgical waveform; and a controller coupled to the at least one sensor and the RF output stage, the controller including a proportional-integral-derivative controller having at least one of voltage limiter or a current limiter, the proportional-integral-derivative controller configured to saturate the RF output stage based on voltage-current characteristics of the RF output stage.

    摘要翻译： 公开了一种电外科发生器。 发生器包括RF输出级，其被配置为产生包括多个周期的至少一个电外科波形; 耦合到所述RF输出级的至少一个传感器，所述至少一个传感器被配置为测量所述至少一个电外科波形的电压和电流; 以及耦合到所述至少一个传感器和所述RF输出级的控制器，所述控制器包括具有限压器或限流器中的至少一个的比例积分微分控制器，所述比例积分微分控制器被配置为使所述RF 基于RF输出级的电压 - 电流特性的输出级。