US Patent No. 9,116,527


Patent No. 9,116,527
Issue Date August 25, 2015
Title Motor Control System That Detects Voltage Saturation
Inventorship Kazuomi Maeda, Yamanashi (JP)
Assignee Fanuc Corporation, Yamanashi (JP)

Claim of US Patent No. 9,116,527

1. A motor control system comprising a plurality of control apparatuses for controlling a motor, and a host control apparatus
which provides a command to said control apparatus, wherein each of said control apparatuses include:
a position control unit which controls position based on a position command and commanded speed provided from said host control

a speed control unit which controls speed based on a speed command supplied from said position control unit;
a current control unit which controls current based on a current command supplied from said speed control unit; and
a current amplifier which amplifies current for driving said motor, based on a voltage command supplied from said current
control unit, and wherein

said current control unit includes:
a voltage saturation processing unit which determines whether said voltage command has exceeded supply voltage of said current
amplifier, and which outputs a result of said determination; and

a voltage saturation notifying unit which notifies said host control apparatus of the result of said determination made by
said voltage saturation processing unit.