Patent ID: 9054608
Filing Date: 2015-06-09
Classification: G05B

Abstract:
1. An electric motor control system comprising: an electric motor control device that controls an electric motor; and an upper-level control device that controls the electric motor control device, wherein the electric motor control device and the upper-level control device are connected to each other via a network, the upper-level control device is configured to transmit a command for driving the electric motor to the electric motor control device, the electric motor control device is configured to control the electric motor based on the command, to drive a driving target object to a target position by the electric motor, the upper-level control device includes an acceleration/deceleration-information adjustment unit that generates a positioning command, which includes target position information, speed information, and acceleration/deceleration information and in which the acceleration/deceleration information is adjusted to match between a plurality of the electric motors to be synchronized, for each of the electric motors, and a communication control unit that transmits a command, which is used after a command that is currently executed and includes an execution order, to the electric motor control device during the electric motor control device performs a driving control of the electric motor, and the electric motor control device includes a command storage unit configured to store a plurality of commands, a communication control unit that stores the command received from the upper-level control device in the command storage unit in the execution order, an acceleration/deceleration-command generation unit that generates a position command including a movement position of the driving target object within a predetermined sampling period, from the positioning command received from the upper-level control device, and a command-follow-up control unit that performs a follow-up control of the electric motor based on the command, and wherein when the command storage unit is fully filled with the commands, the communication control unit of the electric motor control device stores a newly received command in the command storage unit by overwriting the newly received command in an area where an executed command is stored.