Coal mining machine motor speed regulating method based on path optimization and speed regulating control

Abstract

The invention relates to a coal mining machine motor speed regulating method based on path optimization and speed regulating control, and belongs to the technical field of mining. The method is based on petrographic characteristics of a coal face, variable frequency speed regulating control is carried out on an alternating-current variable-frequency speed regulating electromotor used in a coal mining machine, by means of a controller switch, frequency control signal change is combined with speed regulating control, the rotation speed of an alternating-current variable-frequency traction motor and the rotation speed of a cutting motor are adjusted, a frequency control signal controlling change of the rotation speeds changes in a non-step mode and is converted into a target frequency signal through a transition path, and accordingly response of the electromotor is fast and load fluctuation is reduced. The coal mining machine motor speed regulating method based on path optimization and speed regulating control improves response speed of the alternating-current variable-frequency electromotor of the coal mining machine during speed regulating, and meanwhile reduces load fluctuation of the motors in the speed regulating process, so that effectiveness and stability of the alternating-current variable-frequency electromotor and the whole coal mining machine are improved, speed regulating of the whole machine has certain self-adaptability, and work can be done by a few people or remotely.

Description

technical field [0001] The invention relates to a speed regulation method of a coal shearer motor, in particular to a speed regulation method of a coal shearer motor based on path optimization and speed regulation control. Background technique [0002] Early shearers used hydraulic traction, which had problems such as complex structure, high failure rate and low start-up rate. With the application and development of microelectronics technology, electric traction shearers were gradually used, and most shearers have The change from DC electric traction to AC variable frequency electric traction has made AC variable frequency electric traction shearer the main form of current coal shearer, which can achieve efficient coal mining and has made great progress in maintenance and reliability. However, in the environment of heavy load and strong impact, how to realize the quick response of the AC variable frequency motor of the shearer and reduce the load fluctuation during speed reg...

AI Technical Summary

Problems solved by technology

[0003] If the frequency signal that controls the speed of the AC variable frequency motor is directly changed instead of using a certain optimized transition path and control method, the speed response of the motor will be slow and the load fluctuation will be large; the traditional shearer does not adjust the cutting motor speed control, the coordinated control of traction and cutting has not been realized; and the speed regulation of traditional coal shearers is difficult to achieve less-manned and unmanned operations, lacking a certain degree of self-adaptability

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