Method of controlling rotation speed of motor of speed-controllable hoist drive, and hoist drive
US8651301B2 · kind B2 · utility
3Cited by
29References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2009 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Dec 23, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D1/505
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method according to the invention of controlling a rotation speed of a motor of a speed-controllable hoist drive comprises receiving a lift speed instruction; forming a final speed instruction by using initial information containing the lift speed instruction; and using the final speed instruction as a speed instruction for the rotation speed of the motor of the speed-controllable hoist drive. The method further comprises monitoring a position derivative of an actual value of a cable force. The initial information for forming the final speed instruction comprises the position derivative of the actual value of the cable force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.