Ultra-thin servo motors for elevator door operators

Abstract

The invention belongs to the technical field of elevator equipment and relates to an ultra-thin servomotor for an elevator door motor. The ultra-thin servomotor for the elevator door motor solves the technical problems that the design is not reasonable enough and the like in the prior art and comprises a motor casing, wherein a stator is fixedly arranged in the motor casing, a rotary shaft is arranged in the stator in a penetrating manner, a rotor is fixedly arranged on the rotary shaft, one end of the rotary shaft extends out of the motor casing, the motor casing is flat, the stator is shaped like an annular disc body, and the rotor is shaped like a flat annular cover body and is sleeved on the stator. The ultra-thin servomotor has the advantages that 1, the structure is compact, the maintenance and repairing are convenient, the spatial arrangement is facilitated, the mounting of an elevator air-conditioner is facilitated, and the tall elevator car design is adopted; 2, the overall weight is light, the counterweight is reduced, the power of a tractor is reduced, and the operating cost of a driving system is reduced; 3, a magnetic coder is mounted, the connecting structure is simple, and the on-site maintenance is facilitated; and 4, a stator coil adopts the plastic encapsulation process, the gap between a stator winding and the motor casing is reduced, the heat dissipation and anticorrosion capabilities of the stator coil are reinforced.

Description

technical field [0001] The invention belongs to the technical field of elevator equipment and relates to a servo motor, in particular to an ultra-thin servo motor suitable for an elevator door machine. Background technique [0002] The elevator door machine motor is a transmission device installed on the elevator door to control the opening and closing of the elevator door. Some motors have no control function themselves, and need to use frequency converters and encoders to realize their operation. There are currently three types of motors in the market, permanent magnet synchronous elevator door operators, AC door operators and DC door operators. At present, elevator door operators are generally driven by induction motors. The control characteristics of the motor are poor. When driving the elevator door, there are disadvantages such as inflexible control of door opening and closing, slow start and stop speed, and poor positioning. The development direction of door machine...

AI Technical Summary

Problems solved by technology

[0003] However, the existing elevator door machine servo drive motors include but are not limited to the following disadvantages: 1. The volume of the motor is relatively large, especially the axial dimension is relatively large, resulting in a heavy weight of the entire door machine system, which is difficult to disassemble and maintain. It is inconvenient, and invisibly increases the weight of the elevator and the working power of the traction machine, and the driving cost remains high

In addition, due to the large volume, the installation space is seriously wasted, which makes it difficult to arrange rationally and the structure is not compact enough

2. The waterproof, moisture-proof and anti-corrosion performance of the stator is poor. After water enters the motor casing, the copper on the winding enameled wire will react chemically with water through the pores, causing the stator to break after long-term work.

In addition, the insulation capacity of the stator is not high, so the gap between the stator winding and the casing must be designed to be large

The stator is also very difficult to process, the full slot rate is low, and the production efficiency is not high

3. The installation structure of the magnetic encoder is not reasonable enough, it is difficult to disassemble and assemble, and the on-site maintenance is not convenient enough

4. The connection structure between the rotor and the rotating shaft is not reasonable enough, which is prone to axial movement and radial disturbance, which not only increases the working noise, but also reduces the working stability

Although the above-mentioned solution has improved some technical problems of the existing permanent magnet motor for door operators to a certain extent, it still cannot fundamentally solve the above-mentioned technical problems.

Images