According to the driving mode of the elevator, the elevator can be divided into the following categories.
AC elevator, an elevator that uses an AC induction motor as the driving force. According to the drag mode, it can be divided into AC single speed, AC double speed, AC voltage and speed regulation, AC variable voltage and frequency conversion speed regulation, etc.
DC elevator, an elevator that uses a DC motor as the driving force. The rated speed of this type of elevator is generally above 2.00m/s.
A hydraulic elevator generally uses an electric pump to drive the liquid to flow, and a plunger lifts the car up and down.
In a rack and pinion elevator, the guide rail is processed into a rack, the car is equipped with a gear that meshes with the rack, and the motor drives the gear to rotate to make the car lift.
For screw elevators, the plunger of the straight-top elevator is processed into rectangular threads, and then a large nut with thrust bearing is installed on the top of the cylinder, and then the nut is driven by the motor through the reducer (or belt) to rotate, so that the screw is lifted An elevator with a car ascending or descending.
For elevators driven by linear motors, the power source is linear motors.
In the early days of elevators, steam engines and internal combustion engines were used to directly drive elevators, but they have basically disappeared.