DRIVE CONTROLLER FOR ELEVATOR

摘要

PROBLEM TO BE SOLVED: To hold high efficiency and suppress vertical vibration of a riding car, when load applied on an electric motor is changed in any state, by inputting deviation of an output of a load torque estimation means and a generated torque estimation means into a torque instruction. SOLUTION: A momentary torque generated inside an electric motor 60 is so controlled that the ratio of an excitation current and torque current following transitionally at high efficiency is held in relation to a torque instruction τR. At the same time, a vibration component of the electric motor loading torque is estimated and a vibration control signal τT ^{is inputted into the torque instruction τR so as to miniaturize the vertical vibration of a riding car 90. The vibration of the riding car 90 is decreased, while controlling the electric motor 60 at high efficiency including its transitional state. This constitution can provide high energy saving effects and enlarge vibration control effects.}