Control of interconnected trolleys
US8751074B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2011 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Jul 31, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C13/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
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 Krb that is calculated bywherein TAnom=the rated torque of the electric motor of the first hoist trolley, TBnom=the rated torque of the electric motor of the second hoist trolley, vAnom=nominal speed of the first hoist trolley, vBnom=nominal speed of the second hoist trolley, mTA=dead weight of the first hoist trolley, mTB=dead weight of the second hoist trolley mLA=load of the first hoist trolley, and mLB=load of the second hoist trolley.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.