Elevator drive has brake arrangement with at least three mutually independently operating brakes for engaging drive pulley or brake disc attached to pulley

摘要

The drive has an electric drive motor, a gearlessly driven drive pulley (3) for the cable carrying the elevator cabin and a brake arrangement that engages the drive pulley or a brake disc (4) attached to it. The brake arrangement has at least three mutually independently operating brakes (5). Each brake has a lower torque than the maximum permitted constant load torque of the motor.