Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MOTOR DRIVING DEVICE AND DETERMINATION METHOD
Document Type and Number:
Japanese Patent JP2019134501
Kind Code:
A
Abstract:
To suppress the variance of lapses of time until a backup operation is determined to start after a power cut occurs.SOLUTION: A motor driving device 10 comprises: a rectifying circuit 12 for rectifying an alternating-current input voltage Vi supplied from an alternating-current power supply S into a direct-current voltage; a smoothing capacitor 14 for smoothing the rectified direct-current voltage; a relay 18 for outputting a contact signal CS when the input voltage Vi is inputted to the rectifying circuit 12 from the alternating-current power supply S; an input voltage detection unit 34 for detecting the input voltage Vi; a capacitor voltage detection unit 36 for detecting a capacitor voltage Vc; a volatile first memory unit 30; a non-volatile second memory unit 32; and a backup start determination unit 42 for determining whether or not a backup operation for storing the information memorized in the first memory unit 30 into the second memory unit 32 is started based on at least one of the contact signal CS, the input voltage Vi, and the capacitor voltage Vc.SELECTED DRAWING: Figure 1

Inventors:
SAITO SO
KAGAWA TSUTOMU
Application Number:
JP2018012173A
Publication Date:
August 08, 2019
Filing Date:
January 29, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FANUC LTD
International Classes:
H02P3/18
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Takayuki Chima
Shuji Ouchi
Yasuharu Nakasone
Shiro Sakai
Toru Sekiguchi