Research On The Dual-SRM Synchronous Driven Control System Of Shearer

Switched Reluctance Drive (SRD) has the advantages of simple and strong structure, lowcost, large starting torque, low starting current, convenient four-quadrant operation, locked rotorwithout burning the motor and energy saving, so it is suitable for application in undergroundmining machinery. In order to apply SRD to the electrical haulage system of shearers driven bytwo synchronous motors, dual-SRM synchronous driven system controlled by MCU isresearched and designed in this paper.Using16-bits MCU80C196KC as control core and two380V/22kW SRMs as researchobject, circuit structure of general hardware, power converter, detection circuit of rotor position,phase-control signal output, detection circuit of current, circuit of current chopping and overcurrent protection, logic synthesizing circuit and detection circuit of failure of the dual-SRMsynchronous driven system are researched and designed. Software such as major programmodule, starting control module, position interruption module, control algorithm module, timerinterruption module and failure detection and protection module are reasonably designed toensure the motors’ stable running according to special requires of underground coal mine.The research and application of SRD electrical haulage shearers in our country are still inprimary stage，the dual-SRM synchronous driven mode has the disadvantages of inaccuratecontrol system adjustment, feedback deviation existing and incomplete consistency of motorparameters, which leads to actual power deviation of two motors and one motor’s regularoverloading damage. To solve this problem, the power balance of two synchronous SR motors ismainly researched in this paper. A new power balance control method is poposed based oncurrent cross-coupling algorithm and speed setting regulation control and the dual-SRMsynchronous driven system model is established. The feasibility of the designed power balancescheme is verified by using MATLAB/SIMULINK. This scheme further reduces the poweroutput difference of two driven motors and prolongs the service life of the drive motor.Aiming at the nonlinearity and uncertainty of the dual-SRM synchronous driven system,fuzzy control theory is applied and a self-adjustment and self-optimization method is proposed inthe fuzzy control rule. Based on the fuzzy logic toolbox in MATLAB, a self-adaptive fuzzycontroller used as power balance regulation of two synchronous SR motors is designed and itsfeasibility and superiority are verified by SIMULINK simulation.