修井机用低速大转矩永磁电机直驱系统

摘要

传统油田修井机采用柴油机或异步电机驱动.柴油机驱动系统的工作效率低、能耗大、污染高.异步电机和减速箱组成的驱动系统的功率因数低、系统维护复杂、噪声大.永磁电机直驱系统具有结构简单,高效节能,系统维护简单,噪声低等优点,可以解决传统柴油机以及异步电机存在的问题.该系统还具有易于控制,运行稳定的优势.通过单星形与双串星形双绕组变换的方法实现电机的宽恒功率调速.采用特殊表贴式转子结构可以削弱电机转矩脉动.控制上采用闭环矢量控制来实现电机的平稳运行以及带载悬停等功能.%The traditional oil field workover adopts a diesel engine or asynchronous motor as the drive.The diesel engine driving system has low efficiency,high energy consumption and high pol-lution.The drive system of the induction motor with the gearbox has low power factor,system maintenance is complex and the noise is large.Permanent magnetic motor direct drive system has the advantages of simple structure,high efficiency and energy saving,system maintenance is sim-ple and the noise is low.Permanent magnetic motor direct drive system can solve the problem of traditional diesel engine and asynchronous machine.At the same time,the system also has the ad-vantages of easy control and stable operation.The wide range of constant power expansion of the motor is realized by using the transformation of single star winding and double star winding .The torque ripple of the motor can be reduced by using a special form of surface mounted rotor struc-ture.The closed-loop vector control is adopted to realize the stable running of the motor and the function of cease with load.