Permanent magnet synchronous escalator 
 The escalator is a permanent magnet synchronous traction machine with high efficiency permanent magnet synchronous motor gear drives the organic combination of an efficient tractors. Full use of the permanent magnet synchronous motor, low speed high torque high efficiency and high cylindrical helical gear transmission efficiency can be great in the low speed output torque, so does not require high transmission ratio can be improved escalator the required torque. Especially the use of a cylindrical helical gear. With a smooth drive, long life, and high transmission efficiency. Uses a permanent magnet synchronous motor, the magnetic field in the course of their work is produced by the permanent magnet, save the work in the process of induction motor excitation current, power factor close to 1. Therefore, high motor efficiency than induction motors, permanent magnet synchronous motor and because of the low speed can output large torque, so its all work in basically the same conditions of efficiency. Therefore, the permanent magnet synchronous motor efficiency can reach 90%. Efficiency is generally 95%. Compared with traditional tractor escalator, efficiency 40-50%. Permanent magnet synchronous traction machine for escalators escalators, moving walkways of drag. As a result of permanent magnet synchronous technology, and efficient use of a helical gear drive, they were able to achieve high transmission efficiency, better energy saving effect.