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:
Jan. 12, 2016
Filed:
Feb. 21, 2014
Vecoplan Ag, Bad Marienberg, DE;
Wolfgang Lipowski, Seck, DE;
VECOPLAN AG, Bad Marienberg, DE;
Abstract
A comminuting rotor is driven by a rotary current electric motor via a non-positive traction drive, wherein said rotary current electric motor is energized by a controlled frequency converter for operating the comminuting rotor at a predetermined rotational speed during the normal operating phase. A degree of slip of the traction drive is determined and monitored and the rotary current electric motor is controlled for being powered off if a first slip threshold value is exceeded. If a predetermined second threshold of the traction drive slip is exceeded, which is below said first slip threshold, for continuing the operation of the comminuting device, the frequency converter is controlled in a slip operating phase for a closed or open loop control of the traction drive slip to a predetermined third slip threshold value and for reducing the torque output from the rotary current electric motor.