Research On The Soft Starter In The Pit Of The Colliery

In the controlled field of modern industry, it has a research focus in the controlled field of motor to exchange the starting of the asynchronous motor in large capacity all the time. This text with through produce and concurrently essence safe type exchange motor soft instructions for use of starter to ore, adopt high-power two-way brilliant floodgate in charge of , form three phases exchange , transfer , keep circuit , gather , protect with microprocessor and signal link commit the controller, through control whom brilliant floodgate in charge of touch off horn , regulate brilliant floodgate in charge of , transfer output voltage to pigeonhole the circuit, realize the stepping down contactlessly and starting softly of the motor.Ore this one collection motor soft to start, light energy-conserving with many kinds of protection function on integrative novel motor control device year with soft starter, comparing with in the traditional starter, its outstanding advantage embodies in the starting of the regulation motor that can be continuously stepless, assault the torque and bludgon the electric current into being low, control is simple and convenient, start the good and small respect of repetitiveness. Based on analysis the ways of softly starting of motors, study particularly brilliant floodgate in charge of phase place control pairs of slope voltage soft to start way in asynchronous motor soft application start, emphatically. Its start characteristic has got the examination of the national-level monitoring center smoothly.Firstly thesis recommends, exchange asynchronous tradition of motor start, brilliant floodgate in charge of, transfer, keep starting and frequency converter start at first, through comparison with and combination with ore under special environment such as being flammable and explosive with separate produce and concurrently essence safe type soft starter, proposes research contents and groundwork of this thesis.According to starting course of the asynchronous motor , The paper analyzes the commonly used the exchange transfer way of pressing secondly, analyzes brilliant floodgate in charge of phase place control , exchange , transfer , keep principle and in harmony wave prevention and cure method and PID that pollute in electric wire netting regulate; On the basis of analysis of soft starter common limit flow soft to start at present, voltage oblique wave start, torque control starting , torque add , jump , control starting with voltage control foundation of starting suddenly, it points out that it is a...