Method and instrument for detecting balance coefficient of permanent magnet synchronous traction elevator

Abstract

The invention relates to a detection method and a detection instrument for the balance coefficient of a permanent magnet synchronous traction elevator. The detection method includes the steps that a voltage detection device is connected to two ends of the voltage of any phase of a permanent magnet synchronous motor to be detected in parallel; a lead of any phase of the permanent magnet synchronous motor penetrates through a current detection device; the elevator is subjected to no-load repairing and moves downwards, the voltage value Ud and the current value Id when the elevator moves downwards halfway are detected; the permanent magnet synchronous motor of the elevator is externally connected with a symmetrical star-shaped resistor R, the elevator moves upwards in a no-load mode, and the voltage value Uu and the current value Iu when the elevator moves upwards halfway are detected; corresponding voltage signals and current signals are transmitted to a personal computer through a data collection device; the balance coefficient K of the detected elevator is finally obtained through a data detection and processing system. According to the detection method, only the phase current and phase voltage of any phase of the permanent magnet synchronous traction motor are detected, the detection parameter is reduced, and the detection result is accurate. In addition, the detection instrument is easy and convenient to operate, convenient to install and short in detection operation time.

Description

technical field [0001] The invention relates to elevator detection technical equipment, in particular to a detection method and a detection instrument for the balance coefficient of a permanent magnet synchronous traction elevator. Background technique [0002] The permanent magnet synchronous motor used in the permanent magnet synchronous traction elevator has the advantages of small size, energy saving, good control performance, easy to make low-speed direct drive, eliminates the gear reduction device, and can adjust the speed through frequency changes. It is currently in the elevator industry. It has been widely used. In recent years, the proportion of permanent magnet synchronous traction elevators in the total increase of elevators has reached more than 90%. The structure of the traction elevator is to hang the wire rope on the traction wheel, one end is connected to the car, and the other end is connected to the counterweight. Drive the car and the counterweight to mo...

AI Technical Summary

Problems solved by technology

Although these test methods save the link of repeatedly moving weights, there are certain problems, such as the inconvenient installation of the test device on site, the complexity of debugging the instrument, etc., and the insignificant change in the efficiency of the test operation limits the popularization and application.

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