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. 10, 2014
Filed:
Jul. 21, 2011
Mikko Porma, Vantaa, FI;
Mikko Porma, Vantaa, FI;
Konecranes PLC, Hyvinkaa, FI;
Abstract
A hoist trolley assembly includes first and second hoist trolleys, electric motors to drive the trolleys and a control system. The control system receives a preliminary speed reference for the trolleys and forms a final speed reference for the first hoist trolley by using initial data including the preliminary speed reference. The control system is adapted to use a hoist trolley coefficient Kthat is calculated by wherein T=the rated torque of the electric motor of the first hoist trolley, T=the rated torque of the electric motor of the second hoist trolley, v=nominal speed of the first hoist trolley, v=nominal speed of the second hoist trolley, m=dead weight of the first hoist trolley, m=dead weight of the second hoist trolley m=load of the first hoist trolley, and m=load of the second hoist trolley.