|Traction lifts operate by using energy generated by the force of gravity. The lift car is linked to a series of steel cables that pass through a pulley system and are connected to a counterweight at the opposite end.
An inverter and an electric motor move the pulley on which the counterweight and lift car are suspended. The electric motor provides the force needed to break the balance between the car and the counterweight and to generate movement. The motor has a worm gear that controls the motor at low speed with high torque. In some cases, special low speed motors do not need worm gears and are used instead of standard motors attached to mechanical gears.
Gefran inverters in high speed cable systems ensure precise stopping at floor level and perfect system operation.