Characteristics for mine electro-mechanical converter driven by voice coil motor
As the existing intrinsically safe electromagnet has the problem of low response frequency and can not meet the requirements of rapid action of hydraulic support,a high-frequency response intrinsically safe voice coil motor was proposed as a solution for electromechanical conversion device of mine electromagnetic valve.The Ansoft Maxwell simulation model of voice coil motor was established,and the magnetic field distribution,output force characteristics and dynamic characteristics of voice coil motor were studied.The distribution of magnetic field at the air gap is uniform,and the electromagnetic force increases with the increase of magnetic potential,which is less affected by coil displacement.The current of voice coil motor meets the requirements of intrinsic safety under no-load and load.The no-load response frequency is about 6.7 Hz,which is significantly higher than the existing intrinsically safe electromagnet.The load can significantly promote the release process of voice coil motor and the response speed of the motor is faster under load.The research results show that the intrinsically safe electro-mechanical converter by voice coil motor is feasible,which can provide technical reference for further developing and perfecting the mine intrinsically safe electro-mechanical converter with high response.
voice coil motormagnetic field analysisdynamic responseintrinsically safe
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