Method for monitoring the operation of an electric motor, and lifting mechanism
AssigneeSew-Eurodrive GmbH & Co. KG
InventorsThomas Schuster, Robert Becker
Life of this patent
Estimating the term…
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.
Claims16
A method for monitoring an operation of an electric motor including an electromagnetically operable brake adapted to generate brake torque and convey the brake torque to a rotor of the electric motor, comprising:
- acquiring a motor current;
- and
- in an initial step, when the electric motor is switched on, a characteristic of acquired values of the motor current induced during a pre-magnetization is monitored for an exceeding of a permissible measure of deviation from a setpoint characteristic, and the brake of the electric motor is correspondingly activated.
Dependencies are inferred from the claim text.