Surgical stapler having downstream current-based motor control

  • US 10,105,139 B2
  • Filed: 09/23/2015
  • Issued: 10/23/2018
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
Patent Images

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, wherein the control system comprises;

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

    an electrically resistive element electrically connected in parallel with one of the switching devices, wherein the control system is configured to control a force applied to the drive system based on a current measured downstream of the electrically resistive element.

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