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:
Apr. 02, 2024
Filed:
Aug. 10, 2021
Applicant:
Vacon Oy, Vaasa, FI;
Inventor:
Antti Samuli Keskinarkaus, Tampere, FI;
Assignee:
Vacon OY, Vaasa, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 29/032 (2016.01); G01R 31/34 (2020.01);
U.S. Cl.
CPC ...
H02P 29/032 (2016.02); G01R 31/343 (2013.01);
Abstract
The present invention relates to a variable speed drive for driving an electric motor and providing a safe torque off (STO) function. The drive includes two parallel signal buffers connected to a safety controller and at least one IGBT gate driver circuit, wherein the signal buffers share the same IGBT gate control signals as inputs and feed them to the same IGBT gate driver circuits and wherein each signal buffer has an own STO control signal for activation and deactivation of outputs. The invention is also directed at a method for diagnosing a corresponding drive.