Permanent magnet synchronous high-speed tractive machine without gear wheel

Abstract

A high-speed permanent-magnet synchronous drawing machine without gear for elevator's cage is composed of two permanent-magnet synchronous motors with installing bases, drawing wheel installed between said two motors in bridge mode, and installing accessories. Its advantages are simple structure, high load-bearing power and speed, and no vibration and noise.

Description

technical field [0001] The invention relates to a structure of a traction machine used in an elevator drive system, in particular to a structure of a permanent magnet synchronous gearless traction machine, and belongs to the technical field of elevators. Background technique [0002] The existing permanent magnet synchronous gearless traction machine is composed of a permanent magnet synchronous motor, a traction wheel, a braking system, etc., and the traction wheel is installed and connected to the rotor end of the permanent magnet synchronous motor through a rotating shaft, which is cantilevered. The current elevators all use a traction machine composed of a motor, traction wheels, braking system, etc. The carrying capacity of the elevator is small, and it cannot meet the strong power required by the high-speed elevator traction machine. Often take place because the number of passengers is many and cause overload phenomenon, the people who have entered elevator also will c...

AI Technical Summary

Problems solved by technology

The current elevators all use a traction machine composed of a motor, traction wheels, and braking system. The carrying capacity of the elevator is small, and it cannot meet the strong power required by the high-speed elevator traction machine.

It often happens that the overload phenomenon is caused by the large number of passengers. People who have already entered the elevator have to come out, which wastes time and affects people's work.

When the elevator is installed, because most of the permanent magnet synchronous gearless traction machines are flat and thin, it is necessary to design a bracket to pull the traction machine on its back, which is complicated, cumbersome, time-consuming, labor-intensive, and unsightly

In the existing permanent magnet synchronous gearless traction machine, when the elevator is running, the traction wheel is under cantilever force, and the rotor shaft of the motor and the traction machine shaft are subjected to a torque, which easily deforms the shaft and the casing, and is also prone to vibration and damage. Low-frequency noise, motor bearings are also prone to early wear and tear, the overall operating performance is reduced, and even affect the service life of the traction machine and elevator

Nowadays, there are more and more high-rise buildings, and the elevator is driven by a motor at a slow speed. It takes a long time to go from bottom to top, or from top to bottom, and it takes a long time to get on and off passengers in the middle. The speed of existing elevators can no longer meet the needs of the development of the times, and increasing the speed of elevators has become an urgent task for scientific research and production departments

Images