Hitachi Industrial Equipment Systems Co., Ltd.

Yuuri Takano

Satoru Kaneko

Yutaka Matsumoto

Kazuaki Tobari

Mitsuru Matsubara

Hironori Ohashi

Kenta Deguchi

Yusuke Uei

Tetsuo Yanada

Hideto Takada

Terutomo Kondo

Yu Zhang

A motor-controller device includes a position control system that controls the position of a machine end connected to the motor. The motor-controller device receives a first speed directive from a high-level controller, stored in the position control system to output a motor axis position response to the high-level controller, including speed controller and vibration controller in speed control system. The vibration controller includes a position-command estimator that calculates an estimate of the location directive based on the first speed directive and the motor axis position response, a parallel vibration damping controller that extracts frequency components that excite vibration of the machine end included in the first speed directive based on the estimated value of the location directive, and outputs the extracted frequency components.

Motor control device

A electric motor control device comprising a converter section converting AC voltage to DC voltage, an inverter section converting DC voltage from the converter section to AC voltage and supplying said AC voltage to electric motor, an inverter control unit controlling said inverter section, a current detection unit detecting the current flowing in said electric motors and a power calculation unit estimating the temperature of said electric motors from said detected current, calculating the resistance of said electric motors from said estimated temperature, and calculating the copper loss from said calculated resistance.

Electric motor control device

This motor control device receives a speed command from an upper layer system control device having a position controller, the motor control device having: a position command estimator that calculates an estimate of a position command on the basis of the speed command and a motor axis position response; and a speed command generator that generates an actual speed command on the basis of the estimate so that an end section of a machine connected to the motor does not oscillate, wherein the actual speed command is output from the speed command generator to a speed controller.

An estimated value of frequency of a vibration component for automatically adjusting a control unit that suppresses resonance characteristics of a machine is stably and reliably estimated without depending on the magnitude of amplitude of the vibration component and without risk of arithmetic overflow. A motor control device including an automatic adjustment device that adaptively adjusts a controller included in a motor control system based on a frequency of a vibration component superimposed on a response of the motor control system, the automatic adjustment device including a vibration extraction unit that receives the response of the motor control system and extracts the vibration component from the response of the motor control system; a notch filter unit that receives the vibration component from the vibration extraction unit; an encoding unit; a limiter unit that receives an output of the notch filter unit; an adaptive updating unit; and a unit conversion unit.

Motor control device and automatic adjustment method for same

Growing community of inventors

Tokyo, Japan

Yuuri Takano