A front-encoder disc type ultra-thin permanent magnet synchronous traction machine

Abstract

The invention discloses an encoder preposed disc-type ultrathin permanent magnet synchronous traction machine, and the machine comprises a machine base (10), wherein a stator (11) is arranged on the machine base (10); and a rotor (20) which is provided with a magnet (21) which covers the coil of the stator (11) and forms a radial magnetic field with the coil of the stator (11). The rotor (20) is adisc-shaped shell with one protruding end, and a shaft (22) matched with the machine base (10) in a rotating mode is arranged on the protruding inner side of the rotor (20); a front bearing and a rear bearing are arranged on the shaft (22), and a traction wheel (30) is arranged at the protruding outer side of the rotor (20). The machine also comprises a brake (40) and an encoder (50) which are matched with the rotor (20). The machine is reasonable in stress, low in cost, high in strength, long in service life, capable of being disassembled on site and maintained and the like, small in thickness and high in shaft utilization rate.

Description

Technical field [0001] The invention relates to an elevator permanent magnet synchronous traction machine, in particular to an encoder front disc type ultra-thin permanent magnet synchronous traction machine. Background technique [0002] The traction machine is the power equipment of the elevator. In 1996, Finland KONE invented the EcoDisc permanent magnet synchronous traction machine. This type of disc motor adopts an axial magnetic field layout to reduce the front and rear thickness of the synchronous traction machine. At the same time, it encodes the rotation speed of the traction machine. The traction machine is placed on the side of the traction machine, and the speed of the traction machine is transmitted to the side-mounted encoder through a gear and ring gear transmission mechanism. [0003] This design effectively reduces the space occupied by the synchronous traction machine inside the hoistway, and provides great convenience for the layout of the traction machine in th...

AI Technical Summary

Problems solved by technology

In order to break the monopoly of this technology, many attempts have been made in the industry, but none of them can provide an encoder front-end solution different from this technology

Due to the ultra-thin design of the traction machine, the distance between the two bearings is relatively short, and the mechanical stability of the rotor is poor. The machine is installed on the back of the guide rail, and the front encoder cannot be replaced normally.

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