The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2015
Filed:
Sep. 06, 2013
Fanuc Corporation, Minamitsuru-gun, Yamanashi, JP;
Tomokazu Yoshida, Yamanashi, JP;
Shinichi Horikoshi, Yamanshi, JP;
FANUC CORPORATION, Yamanashi, JP;
Abstract
A motor drive device includes a converter which mutually converts power between AC power and DC power, an inverter which converts the DC power into AC power for driving a motor to output to a motor side, and converts regenerated AC power from the motor side into DC power to output to the DC side, a DC link unit which connects a DC side of the converter and a DC side of the inverter, a voltage detecting unit which detects a DC voltage value, an alarm level setting unit which sets an alarm level of the DC voltage value, an alarm determining unit which determines whether or not the DC voltage value exceeds the alarm level, and an alarm reporting unit which instructs the inverter to stop conversion operation when it is determined that the voltage value exceeds the alarm level.