Active braking electrical surgical instrument and method for braking such an instrument
    3.
    发明授权
    Active braking electrical surgical instrument and method for braking such an instrument 有权
    主动制动电气手术器械及其制作方法

    公开(公告)号:US08627993B2

    公开(公告)日:2014-01-14

    申请号:US12612525

    申请日:2009-11-04

    IPC分类号: A61B17/03

    摘要: An electrically powered surgical instrument includes a surgical end effector having a surgical procedure effecting actuation assembly. A handle is coupled with the end effector. An electric motor is disposed within a shell of the handle and has power terminals and a drive train actuating the assembly when the motor is supplied with power. A break-before-make power supply switch at the handle selectively controls supply of power to the motor. A post-termination braking circuit electrically short-circuits the power terminals when the switch does not supply power to the motor. A method for post-termination braking of an electrical motor utilizes the permanent magnetic field of the motor to counteract an inertia-induced over-stroke characteristic of the motor, drive train, and/or actuation assembly after powered operation by short-circuiting the still-spinning motor to create an electrically generated magnetic field in opposition to the permanent magnetic field upon ceasing supply of power to the motor.

    摘要翻译: 电动外科器械包括具有影响致动组件的手术过程的手术末端执行器。 手柄与末端执行器相连。 电动机设置在手柄的壳体内,并且当电动机被供电时具有动力端子和驱动组件的驱动系统。 手柄上的断开电源开关可选择性地控制电机的电源供应。 当开关不向电机供电时,终端后制动电路使电源端子电短路。 一种用于电动马达的终端后制动的方法利用电动机的永久磁场,通过使静止电动机短路来抵消动力操作之后电动机,传动系和/或致动组件的惯性引起的超行程特性 在停止向电动机供电时产生与永久磁场相对的电产生的磁场。