Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MOTOR DRIVE DEVICE
Document Type and Number:
Japanese Patent JP2020058209
Kind Code:
A
Abstract:
To provide a motor drive device in which abnormality of a dynamic brake circuit is detected.SOLUTION: A motor drive device 1 comprises: a converter 11; an inverter 12; a DC link capacitor 13; a dynamic brake circuit 20 that has a resistor 21 and a switch 22 provided between terminals of a motor 3, controls the switch 22 to an opening state to open between the terminals of the motor 3 at driving the motor 3, controls the switch 22 to a closing state to short-circuit between the terminals of the motor 3 via the resistor 21 and thereby brake the motor 3 at stopping the motor 3; current detectors 41 and 42 that detect a drive current of the motor 3; and an abnormality detection unit 30 that detects abnormality of the dynamic brake circuit 20 at driving the motor 3 on the basis of an inclination of a rising or falling of the drive current of the motor 3 detected by the current detectors 41 and 42.SELECTED DRAWING: Figure 1

Inventors:
TATSUTA MASAYA
MATSUMOTO YASUYUKI
Application Number:
JP2018189389A
Publication Date:
April 09, 2020
Filing Date:
October 04, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FANUC LTD
International Classes:
H02P3/22; H02P27/08; H02P29/024
Attorney, Agent or Firm:
Masayuki Masabayashi
Tetsuo Shiba
Hiroaki Hoshino



 
Previous Patent: 力率改善回路

Next Patent: 鳥害防止具