Elevator traction machine

Abstract

The invention provides an elevator traction machine. The elevator traction machine comprises a stator, a rotor, a motor fixing component, a measurement device, a traction wheel, a bearing and a main body part. The motor fixing component is connected to the main body part, or the motor fixing component and the main body part are of an integrated structure. The stator is mounted on the motor fixing component. The rotor is supported on the main body part through a bearing. The rotor and the stator are arranged correspondingly. The measurement device is used for measuring the position and / or rotational speed of the stator of a motor. The measurement device comprises an encoding ring and an induction device. The encoding ring is circumferentially arranged on the rotor or a rotating part connected with the rotor and used for encoding the position of the rotor. The induction device is arranged on the motor fixing component, faces the encoding ring and is used for reading signals of the encoding ring. Through combination of the machine and a magnetic field, the rotational speed or the position of the rotor is accurately encoded through the encoding ring, and accordingly, an elevator control system can identify and accurately control the position of the elevator traction machine.

Description

technical field [0001] The invention relates to an elevator driving device, in particular to an elevator traction machine capable of measuring the rotational speed and / or position of a motor rotor in an elevator. Background technique [0002] The elevator uses measuring devices to measure, identify and control the rotor position or speed of the traction machine. Traditional measuring devices are generally photoelectric, pure magnetic ring or pure mechanical. Usually, the photoelectric measuring device must be installed on the rotating shaft and move synchronously with the rotor. When the shaft is a fixed structure, it is difficult to install on the traction machine, and the structure has limitations. However, although the magnetic ring measuring device can be installed, it can only identify the relative position of the rotor, and cannot accurately measure the absolute position of the rotor. Purely mechanical measuring devices, because the mechanical device itself does not ...

AI Technical Summary

Problems solved by technology

Usually, the photoelectric measuring device must be installed on the rotating shaft and move synchronously with the rotor. When the shaft is a fixed structure, it is difficult to install on the traction machine, and the structure has limitations

However, although the magnetic ring measuring device can be installed, it can only identify the relative position of the rotor, and cannot accurately measure the absolute position of the rotor.

Purely mechanical measuring devices, because the mechanical device itself does not send out signals, and rely solely on the sensing device to sense the signal feedback from the mechanical device, the sensitivity of the sensing device is very high, and the accuracy of the system is also very high, and the control signal is easily lost, resulting in Elevator failure rate greatly increased

Images