Surgical stapler having motor control based on an electrical parameter related to a motor current

  • US 10,238,386 B2
  • Filed: 09/23/2015
  • Issued: 03/26/2019
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
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1. A surgical stapler, comprising:

  • a drive system;

    an electric motor mechanically coupled to the drive system;

    a battery electrically couplable to the electric motor; and

    a control system electrically connected to the electric motor, the control system comprising;

    an H-bridge circuit comprising a high side and a low side, wherein the low side of the H-bridge circuit comprises first and second switching devices;

    an electrically resistive element electrically connected in series with the first switching device; and

    an electrically inductive element electrically connected to the electrically resistive element, wherein the control system is configured to control a force applied to the drive system based on a current downstream of the electrically resistive element.

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