电动机的机械特性可分为绝对硬特性、硬特性、软特性和人为机械特性 ,在抽油机的设计和改造过程中 ,应以降低抽油机的载荷波动参数为目标 ,减小其装机功率 ,使其适合于电动机的机械特性 .中转差电动机与抽油机载荷特性的匹配最合理 ,综合考虑实际应用和经济效益 ,选择电动机的排序为中转差电动机、永磁电动机、超高转差电动机、Y系列电动机 . The mechanical properties of the motor can be divided into absolute hard, hard, soft and man-made mechanical properties. During the process of designing and rebuilding the pumping unit, the load fluctuation parameters of the pumping unit should be reduced as the goal to reduce the installed power , Making it suitable for the mechanical properties of the motor.Charter motor and pumping unit load characteristics of the most reasonable match, considering the practical application and economic benefits, select the motor sort for the slip motor, permanent magnet motor, ultra-high slip motor , Y series motor.