Patent ID: 7227323

Claim:
A motor driving apparatus for driving an AC motor using regenerative electric power as well as electric power from an AC power source, comprising: a converter section rectifying and converting an alternating current from the AC power source into a direct current; an inverter section connected to the AC motor and converting the converted direct current into an alternating current to drive the AC motor; a DC link connecting said converter section and said inverter section; a driving controller controlling an operation of said inverter section in accordance with control signals from a host controller; a power storage section connected to said DC link, storing regenerative electric power in a decelerating drive of the AC motor and discharging the stored electric power in an accelerating drive of the AC motor, said power storage section having an interface with the host controller or said driving controller so that upper limits of charging current/voltage are changeable in accordance with data inputted through said interface from the host controller or the driving controller; and a memory storing specifications of the motor driving apparatus, wherein upper limits of charging current/voltage of said power storage section are set in accordance with the specifications read from said memory and inputted through the interface.