公开(公告)号：US20230053662A1

公开(公告)日：2023-02-23

申请号：US17793868

申请日：2020-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hayata SAKAI ,  Toru TAZAWA ,  Kenta MURAKAMI ,  Yusuke NONOGAKI ,  Renya KAWAKAMI

IPC: H02P25/064 ,  H02P6/00 ,  H02P6/16 ,  H02P6/28

Abstract: 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 Δθ (t0), which is a position deviation at time t=t0, based on Δθ (t0)=Δθ (t0−td)+A−B, where A is a difference between an instructed position at time t=t0 and an instructed position at time t=t0−td, and B is a difference between an actual position at time t=t0 and an actual position at time t=t0−td, and supply power to the power supply target coils by the position deviation Aθ (t0).

公开(公告)号：US20230057511A1

公开(公告)日：2023-02-23

申请号：US17792315

申请日：2020-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenta MURAKAMI ,  Renya KAWAKAMI ,  Toru TAZAWA ,  Yusuke NONOGAKI

IPC: H02P25/064 ,  H02P6/00 ,  H02K11/21 ,  H02K41/03

Abstract: 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 that serve as power supply targets; and a control device that supplies power to the one or more power supply target coils by using a total mass calculated based on a mass of the permanent magnet. The control device includes: an acquirer that acquires a total number of the one or more power supply target coils; a speed control unit that calculates a post-division total mass by dividing the total mass by the total number of the one or more power supply target coils, and generates a torque instruction by using the post-division total mass; and a current control unit that supplies power to the one or more power supply target coils based on the torque instruction.

公开(公告)号：US20230015803A1

公开(公告)日：2023-01-19

申请号：US17782923

申请日：2020-12-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Renya KAWAKAMI ,  Kenta MURAKAMI ,  Toru TAZAWA ,  Yusuke NONOGAKI

IPC: H02P25/064

Abstract: 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.