Permanent magnet direct drive variable frequency motor all-in-one machine state monitoring system

Abstract

The invention discloses a state monitoring system for a permanent magnet direct drive variable frequency motor all-in-one machine, and belongs to the field of industrial automation. The state monitoring system for the permanent magnet direct drive variable frequency motor all-in-one machine comprises an optical fiber temperature sensor, an optical fiber vibration sensor, a permanent magnet directdrive variable frequency motor all-in-one machine, an optical fiber grating demodulator, a transmission optical fiber and a control system, wherein the optical fiber temperature sensor and the opticalfiber vibration sensor are fixedly arranged on the outer wall of the permanent magnet direct drive variable frequency motor all-in-one machine; the output ends of the optical fiber temperature sensorand the optical fiber vibration sensor are electrically connected with the input end of the optical fiber grating demodulator, and the output end of the optical fiber grating demodulator is electrically connected with the input end of the control system. In the invention, the detection system using the optical fiber transmission is not influenced by interference, has strong anti-interference capability, long transmission distance and good transmission quality, and greatly improves the stability of signal transmission.

Description

technical field [0001] The invention relates to the field of industrial automation, in particular to a state monitoring system for a permanent magnet direct drive variable frequency motor integrated machine. Background technique [0002] The coal industry is an important energy industry in my country. With the continuous improvement of the automation of coal production in my country, combined with the implementation outline of the national "intelligent mine construction", the requirements for the automation and intelligence of modern mining equipment have been further increased. At present, mining explosion-proof and intrinsically safe frequency converters and drive motors are widely used in the field of mine automation, but in actual coal mine application sites, the motor and frequency converter are generally installed separately, and in some cases, the distance between the motor and the frequency converter is several A distance of 100 meters, too long cables will not only ...

AI Technical Summary

Problems solved by technology

First of all, the sampling, processing and communication of various electrical signals will occupy the internal resources of the inverter controller with the help of the hardware circuit of the frequency conversion part, which is not conducive to the performance of the drive performance of the inverter; secondly, the site environment is harsh, and the permanent magnet direct drive inverter motor is integrated. When the computer communicates with the host computer over a long distance, the interference problem is serious, which leads to unstable signals transmitted to the host computer, inaccurate display, and the inability to correctly display the actual status of the device, which misleads the staff and affects the normal operation of the device.

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