Method for monitoring the operation of an electric motor, and lifting mechanism
US11695362B2 · kind B2 · utility
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2References
16Claims
0Family size
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Key dates
| Filing date | Sep 12, 2019 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Mar 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a method for monitoring the operation of an electric motor and a lifting mechanism, the motor current is acquired, and the electric motor has, for example, an electromagnetically actuable brake, e.g., a holding brake. In the method, a pre-magnetization is performed when the electric motor is switched on, the characteristic of the acquired values of the motor current is monitored for an exceeding of a permissible measure of deviation from a setpoint characteristic, and a brake of the electric motor is activated, e.g., remains applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.