US Patent No. 10,148,203

MOTOR DRIVING APPARATUS INCLUDING DC LINK VOLTAGE DETECTION UNIT


Patent No. 10,148,203
Issue Date December 04, 2018
Title Motor Driving Apparatus Including Dc Link Voltage Detection Unit
Inventorship Yasuyuki Matsumoto, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 10,148,203

1. A motor driving apparatus comprising:a converter unit configured to convert an AC voltage into a DC voltage;
a DC link unit configured to smooth the DC voltage by a capacitor to generate a DC link voltage;
multiple inverter units configured to convert the DC link voltage into a multiphase AC voltage for motor driving;
multiple pairs of short bars configured to electrically interconnect terminals of the DC link unit and terminals of the multiple inverter units; and
multiple DC link voltage detection units, each DC link voltage detection unit being connected to a corresponding inverter unit and configured to detect the DC link voltage at the corresponding inverter unit, so as to detect whether one of the short bars that connects the corresponding inverter unit to the DC link unit has been disconnected,wherein at least parts of the multiple pairs of short bars are located between the terminals of the DC link unit and terminals of the multiple DC link voltage detection units, and wherein the converter unit and the inverter unit are arranged in independent casings and interconnected by using the short bars provided outside the casings.