Robot overcurrent prevention system

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 (7a) connecting the electric motors to a power source (7), and drive circuits (72) to supply current to the electric motors, the...

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Bibliographische Detailangaben
Hauptverfasser:	KOYANAGI, TAKURO, SHIMADA, TAKAMICHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHAMBERS PROVIDED WITH MANIPULATION DEVICES CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GENERATION HAND TOOLS MANIPULATORS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS PORTABLE POWER-DRIVEN TOOLS REGULATING TRANSPORTING
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Beschreibung
Zusammenfassung:	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 (7a) connecting the electric motors to a power source (7), and drive circuits (72) to supply current to the electric motors, there are provided a switching device (80a) installed in the power circuit, a current sensor (80b) detecting the current supplied to the electric motors, and the output of the current sensor is compared with a threshold value (Va) 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.