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:
May. 01, 2012
Filed:
Apr. 03, 2008
Masahiro Yasohara, Hyogo, JP;
Kenji Sugiura, Osaka, JP;
Masahiro Yasohara, Hyogo, JP;
Kenji Sugiura, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A motor driving device () includes an inverter (), a speed control unit (), and a regeneration preventing means (). The inverter () converts supplied DC power to driving power for driving a motor (), and supplies the driving power to the motor (). The speed control unit () generates a speed control signal group based on a speed command signal Sref and a speed detection signal N, and adjusts the driving power based on a drive control signal VSP1 included in the speed control signal group, thereby controlling the speed of the motor (). The regeneration preventing means () determines whether the motor () is in a state possibly causing regenerative phenomena or in a state not causing regenerative phenomena based on the speed command information included in the speed command signal Sref and the speed detection information included in the speed detection signal N, and performs a regeneration reduction process to reduce regenerative phenomena according to the determination result, thereby preventing regenerative phenomena.