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. 08, 2010
Filed:
Dec. 17, 2007
Applicant:
Erkki Miettinen, Kokemäki, FI;
Inventor:
Erkki Miettinen, Kokemäki, FI;
Assignee:
ABB Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 5/00 (2006.01); G05D 23/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
Method and arrangement in connection with a motor fed with a frequency converter provided with an intermediate voltage circuit. The method comprises steps of feeding motor voltage to the motor along a motor cable with a frequency converter for controlling the motor, rectifying the voltage of the motor cable and restricting the magnitude of the voltage of the motor cable at the end of the motor cable on the side of the motor with a clipper circuit coupled in parallel with the motor, using the rectified voltage for rotating one or more cooling fans of the motor.