Method for operating an actuating drive
US6424108B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1163
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for operating an actuating drive for controlling fittings. The actuating drive has an electric motor which is fed from a frequency converter and moves a fitting with a predetermined torque via a self-locking gearbox. In order to protect the actuating drive against unacceptable, destructive heating while maintaining operation in the surrounding process installation when an excess temperature occurs, the temperature of the actuating drive is measured during continuous operation, and the rotation speed of the electric motor is reduced as a function of the measured temperature while maintaining the torque. To this end, the amplitude and the frequency of the output voltage of the frequency converter are reduced in proportion to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.