Permanent magnet synchronous electric motor and its automatic staircase or automatic footway

Abstract

This invention relates to a permanent magnetic synchronous motor and its movimg staircase or moving pedestrian crosswalk without inverters and encoders installed. Said magnet synchronous machine has the ability of starting up asynchronously by applying a rotor made of multi-pole built-in magnet steel and having a rotor cage including: a bracing shaft having the rotor, a stator winding, a stator core, end covers at the front and the back and a rotor core, which can drive the staircase and the pedestrian crosswalk to start up smoothly and operate in the state of a synchronous motor showing the high efficiency and power factors either in light, empty or full load.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor and an escalator or an automatic sidewalk made of the permanent magnet synchronous motor. Background technique [0002] With the rapid development of urban construction, escalators or moving walks are increasingly used as public transportation by large shopping malls, railway stations, airports, supermarkets and entertainment venues. Most of today's escalators or moving walks are driven by traditional asynchronous motors, which are driven by a reduction gear with a large transmission ratio to obtain sufficient torque, and the running escalators or moving walks spend about 80% to 90% of the time at Light or no load, so energy consumption is very high. Traditional asynchronous motors often achieve energy saving by adding a frequency converter, but adding a frequency converter itself increases the cost of the whole machine, and cannot change the shortcomings of asynchronous motors such as low ...

AI Technical Summary

Problems solved by technology

In short, there is no permanent magnet synchronous motor with asynchronous starting capability suitable for escalators or moving walks in the prior art.

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