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:
Oct. 09, 2007
Filed:
Jan. 25, 2006
Shoetsu Takahashi, Fukuoka, JP;
Sumitoshi Sonoda, Fukuoka, JP;
Shoetsu Takahashi, Fukuoka, JP;
Sumitoshi Sonoda, Fukuoka, JP;
Kabushiki Kaisha Yasakawa Denki, Fukuoka, JP;
Abstract
In a servo control apparatus constituted by a converter unitfor rectifying an AC power supply voltage to produce a DC power supply voltage, and a plurality of inverter unitsfor producing drive power supply voltages of motors from the DC power supply voltage, the servo control apparatus is provided with a power supply breakerwhich is connected to the side of the AC power supply of the converter unit; and a ground fault detecting circuitbuilt in the converter unit. When a ground fault happens to occur, the servo control apparatus stops the operations of all of the inverter unitsso as to cut off the breaker