Panasonic Intellectual Property Management Co., Ltd.

Yusuke Nonogaki

Toru Tazawa

Kenta Murakami

Renya Kawakami

Hayata Sakai

Yusuke Imada

Kento Yoshino

A motor driver drives a motor that controls a position of an object based on a command from a controller. The motor driver includes: a correction command output part that outputs a correction command for correcting a position of the motor based on a position of the object detected by a displacement sensor that detects the position of the object; and a position controller that outputs a drive signal for driving the motor based on the command from the controller and the position of the motor detected by an encoder that detects the position of the motor, or based on the correction command and the position of the motor detected by the encoder.

Motor driver

A linear motor system includes: a stator including first to tenth coils; a mover including a permanent magnet; a switcher that switches one or more power supply target coils; and first to tenth amplifiers provided in one-to-one correspondence with first to tenth coils. One or more amplifiers that serve as new one or more power supply target amplifiers immediately after the switching calculate &#x394;&#x3b8; (t), which is a position deviation at time t=t, based on &#x394;&#x3b8; (t)=&#x394;&#x3b8; (t&#x2212;td)+A&#x2212;B, where A is a difference between an instructed position at time t=tand an instructed position at time t=t&#x2212;td, and B is a difference between an actual position at time t=tand an actual position at time t=t&#x2212;td, and supply power to the power supply target coils by the position deviation &#x394;&#x3b8; (t).

Linear motor system

A linear motor system includes: a stator including first to tenth coils; a mover including a permanent magnet; a switcher that switches one or more power supply target coils; and a control device that supplies power to the one or more power supply target coils by using a deviation integral value obtained by integrating a speed deviation that is a difference between an instructed speed of the mover and an actual speed of the mover. The control device includes: a compensator that calculates a post-division deviation integral value by dividing a post-summation deviation integral value, which is a value obtained by summing the deviation integral value used to supply power to each of the one or more power supply target coils immediately before the switching, by the total number of the one or more power supply target coils immediately after the switching; and a current control unit.

Growing community of inventors

Osaka, Japan

Yusuke Nonogaki