Patent ID: 8847539
Filing Date: 2014-09-30
Classification: H02P

Abstract:
1. A servomotor drive device comprising: a first converter having a plurality of first rectifier elements configured to convert an AC current from an AC power source into a DC current and to supply DC power to a first inverter configured to convert DC power into AC power; a regenerative resistor circuit connected in parallel to the first converter and having a first switching element and a regenerative resistor configured to consume regenerative energy generated during speed reduction of a servomotor connected in series to the first inverter and connected to a rotating shaft of a moving part of an industrial robot when the first switching element is in the on state; a first connection part configured to connect a second converter in parallel to the regenerative resistor circuit in an attachable and detachable manner; and a first control unit configured to control the on and off states of the first switching element, wherein the second converter has: