Gearless traction elevators typically use a DC motor at low RPM but producing high torque. It means that the motor used here would be larger in power capacity. They are not connected to any gearbox but are directly attached to the shaft. This type of elevator has the speed advantage and has brakes attached to it as a safety option. In case of power failure, the breaks would engage bringing it to a halt.
Hydraulic elevators are of three type:
- Rope type.
Conventional hydraulic elevator: They are powered by an underground hydraulic cylinder and have a typical speed of 1m/s. Ideal for condos having 4 to 5 floors, for higher buildings a larger cylinder might be used.
Holeless hydraulic elevator: In this type, the hydraulic cylinder is installed on the ground and is an economical option for a building having 2 to 3 floors.
Roped hydraulic Elevator: They have a set of both above and below the ground cylinders and cater for larger buildings.
With miniaturization of components used in a traction elevator, the hydraulic elevators are constantly losing market share as its losing economic viability.
Electromagnetic propulsion elevator:
These types are a great innovation in the field of elevators. Electromagnetic propulsion elevators do not have cables and ropes and can move both horizontally and vertically. They do so by using the properties of electromagnetics and varying magnetic fields.