Geological Drilling Rig Direct-drive Permanent Magnet Motor Automatic Drilling Control System

Geological drilling rig used in geological exploration, driving to the underground drillingdrilling for geological samples, the top drive drilling rig, mud pump and three winch system.Winch winch throughout the drilling cycle is completed from under the drill, casing, drillingand other work sent, the rig lifting system is the core equipment. Constant automatic drillingtechnology is an important indicator of whether or not advanced a rig, rig demand due to thegeological formation of complex ore sample collection, automatic drilling primarily in realtime feedback to adjust the pressure according to the drill running speed winch, constant WOBunder the conditions of a timely sent to the bottom of the drill, so the focus of this paper is tostudy the precise control on the winch.The traditional disc brake and thus to control the drilling pressure by controlling thewinch brake torque. Asynchronous frequency winch system must set up a separate smallpower drill motor to send additional reducer. The above method makes winch structurebecomes complicated, and there will be a significant induction motor torque ripple brakingpower when running at low speed, seriously affecting the automatic drilling rig geologicaleffects. In order to solve the problems of traditional winch drive system, improve winchperformance, optimize transmission structure and improve the quality of automatic drillingdesigned low speed high torque direct drive permanent magnet motor inverter rig systems. Inthis paper, the structural characteristics of permanent magnet motors and frequency controlmethod of this drive system are discussed, introduces the dual coaxial winch permanentmagnet motor structure, and permanent magnet direct drive single carrier results winch motorand dual motor coaxial with analyzed, and then the permanent magnet motor automaticdrilling rig geological techniques are described, for automatic drilling rig geological systemslarge delay, nonlinear modeling difficult features using fuzzy control methods and designs forS7-300PLC The look-up table program. Finally, the hardware and software of the rig controlsystem components.This set the winch motor drive system in the body and inverter control system to optimizethe geological drilling rig winch. Direct drive permanent magnet motor winch system loadcapacity, strong control of high precision, the ability to meet the start like cranes and automatic drilling process to follow the dynamic response capabilities. Fuzzy Control automatic drillingdriller can improve the quality and cost-efficiency of geological drilling rig.