Multi-axis robot power shut-off device and multi-axis robot

摘要

A plurality of motors, which drive plurality of axes of multi-axis robot, respectively; plurality of power converters, which control operation of plurality of motors, respectively, by supplying and controlling electric power to plurality of motors; drive circuits, each of which drives first semiconductor switching elements included in a corresponding one of power converters by outputting drive signals to control terminals of first semiconductor switching elements in accordance with control signals for controlling operation of the motors; shut-off circuit provided at non-end position in an electrical path, through which first operating power is supplied to drive circuits; and shut-off control circuit, which outputs shut-off signals to shut-off circuit. The shut-off circuit includes second semiconductor switching elements, which are inserted in an electrical path in series to each other, second semiconductor switching elements turning off in accordance with shut-off signals, respectively, to shut off the electrical path.