Flat traction motor

Abstract

The invention discloses a flat traction motor for an elevator. The radial magnetic flux permanent-magnetism traction motor comprises a stator part and a rotor part, a rotor comprises a traction rope groove portion, a stator support portion and a rotor plate in U shaped connection; the inner edge of the rotor plate is integrated and connected to the first end edge of the stator support portion, theouter edge of the rotor plate is integrated and connected to the first end edge of the traction rope groove portion, and the traction rope groove portion is positioned in the periphery of the statorsupport portion; a traction rope groove is arranged in the outer peripheral surface of the traction rope groove portion, and magnetic steel is attracted by the inner peripheral surface of the tractionrope groove portion; a stator core is fixed to the outer peripheral surface of a stator core support portion, and the stator core, a stator coil and the stator core support portion are positioned inan annular groove between magnetic steel of the rotor and the stator support portion, and the inner peripheral surface of the stator core support portion is supported by the outer peripheral surface of the stator portion via a pair of bearings. The motor is short in the axial length, compact in structure and good in heat radiation effect.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous traction motors for elevators, in particular to a flat traction motor for elevators. Background technique [0002] At present, the permanent magnet synchronous traction motors used in elevators mainly include radial flux permanent magnet traction motors and axial flux disc permanent magnet motors. For radial flux permanent magnet traction motors, the traction sheave is fixedly connected to the rotor side by welding, press-fitting or other methods; or the traction sheave and the rotor are integrally cast, but the traction sheave is still on the rotor side, forming a cantilever formula structure. This cantilever structure has high mechanical performance requirements for structural parts, which will inevitably lead to a substantial increase in material consumption, low bearing life, or selection of larger bearings, resulting in increased costs. In addition, this cantilever stru...

AI Technical Summary

Problems solved by technology

This cantilever structure has high mechanical performance requirements for structural parts, which will inevitably lead to a substantial increase in material consumption, low bearing life, or selection of larger bearings, resulting in increased costs

In addition, this cantilever structure has a long axial length, which cannot meet the requirements of thinning technology trends

[0003] In order to improve the shortcomings of the cantilever radial flux permanent magnet traction motor, a radial flux permanent magnet traction motor in the form of a double support structure has appeared, or in the Chinese patent authorization number CN204823609U, the traction rope groove is processed outside the rotor However, the radial flux permanent magnet traction motor of this type of structure has the problem that the axial length is still relatively long.

[0004] In addition, such as the Chinese patent authorization number CN208241552U, the traction rope groove is also processed on the outer circle of the rotor, but this kind of technology is applied to the double-stator large-load traction machine, and there is still a shortcoming of long axial length

[0005] In addition, the casing of the above-mentioned radial flux permanent magnet traction motor is closed, and the heat dissipation effect is not good. As we all know, the heat dissipation of the motor has restrictions on the power volume ratio, so there is a limit to improving the power volume ratio.

[0006] Although the axial length of the axial flux disc permanent magnet motor is greatly shortened compared with the radial flux permanent magnet traction motor, it still has the following defects: 1. The stator core needs to be punched and wound, and the process is complicated, requiring special Slot punching and winding iron core equipment; 2. The stator core forms an off-line slot on the end face, and the stator coil is difficult to off-line; 3. There is a large suction force in the axial direction of the stator and rotor, so a larger bearing needs to be selected, and the bearing life is shortened

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