Classification of passenger lifts

According to the drive classification
AC induction motor as the driving force of the elevator. According to drag the way can be divided into single-speed AC, AC double-speed, AC voltage regulator, AC variable frequency drive and so on.
DC elevator: a DC motor as the driving force of the elevator. The rated speed of such elevators is generally above 2.00m / s. Hydraulic elevator: the general use of electric pumps to drive the liquid flow, the lift lift by the plunger elevator.
Rack and pinion elevator: the rack processed into racks, the car fitted with gear meshing gear, the motor driven gear rotation to lift the elevator car.
Screw elevator: the straight-top elevator plunger processed into a rectangular thread, and then with a large thrust bearing bearings installed in the cylinder head, and then by the motor through the reducer (or belt) drive nut rotation, so that screw up A car that ascends or descends an elevator.
Linear motor driven elevator, the power source is a linear motor. The early advent of the elevator, used the steam engine, internal combustion engine as a direct drive power elevator, is now basically extinct. Motor by the reducer
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