×

Robot overcurrent prevention system

  • US 7,262,574 B2
  • Filed: 10/18/2005
  • Issued: 08/28/2007
  • Est. Priority Date: 10/19/2004
  • Status: Active Grant
First Claim
Patent Images

1. An overcurrent prevention system for a robot having at least a pair of links connected by a joint, and an electrical system including an electric motor installed at the joint, a power circuit connecting the electric motor to a power source, and a drive circuit installed in the power circuit to supply current to the electric motor in response to a current supply command, comprising:

  • a switching device installed in the power circuit and cutting off the drive circuit when turned off;

    a current sensor generating an output indicative of the current supplied to the electric motor through the drive circuits; and

    an overcurrent suppressor comparing the output of the current sensor with a threshold value and executing a switching action for operating the switching device to cut off the power circuit intermittently during a first predetermined time period when the output of the current sensor exceeds the threshold value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×