Robot overcurrent prevention system

Details Robot overcurrent prevention system Robot overcurrent prevention system

2007-08-28

2007-08-28

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

C318S568240, C318S563000, C318S434000, C361S094000, C361S100000

Reexamination Certificate

active

11251802

ABSTRACT:
In an overcurrent prevention system for a robot having links connected by joints and an electrical system including electric motors installed at the joint, a power circuit connecting the electric motors to a power source, and drive circuits to supply current to the electric motors, there are provided a switching device installed in the power circuit, a current sensor detecting the current supplied to the electric motors, and the output of the current sensor is compared with a threshold value and the switching device is operated to execute a switching action to cut off the power circuit intermittently during a first predetermined period when the output of the current sensor exceeds the threshold value, thereby protecting the electrical system when overcurrent is detected, without causing functional disablement and/or posture instability of the robot.

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