公开(公告)号：US20250076102A1

公开(公告)日：2025-03-06

申请号：US18248174

申请日：2021-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta SHIRAKI ,  Hiroshi FUJIWARA ,  Toru TAZAWA

IPC: G01H1/00

Abstract: An oscillation information calculation device includes: a sensor information obtainer that obtains time series position information on a motor as detected by a position detector, and time series sensor information on a movable part as detected by a sensor attached to the movable part, the movable part being connected to the motor via a joint; and an information calculator that calculates and outputs at least one of oscillation presence/absence information, oscillation frequency information, or oscillation causal information, based on the time series position information and the time series sensor information, the oscillation presence/absence information indicating presence or absence of oscillation of the motor and the movable part, the oscillation frequency information indicating an oscillation frequency of the motor and the movable part, the oscillation causal information indicating a cause of the oscillation of the motor and the movable part.

公开(公告)号：US20190146453A1

公开(公告)日：2019-05-16

申请号：US16228698

申请日：2018-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toru TAZAWA ,  Hiroshi FUJIWARA ,  Masaru NISHIZONO

IPC: G05B19/35 ,  H02P23/00 ,  G05B19/19

CPC classification number: G05B19/358 ,  G05B19/19 ,  G05B2219/34432 ,  G05B2219/37312 ,  G05B2219/42152 ,  H02P23/0004 ,  H02P2205/05 ,  H02P2205/07

Abstract: A method, according to the present invention, of adjusting control parameters used in a control apparatus of an electric motor includes the steps of: computing a first frequency characteristic (Step 1); computing a present speed-proportional gain range (Step 2); computing a present mechanical-system characteristic constant (Step 3); computing a present proportional gain range (Step 4); computing a secular characteristic (Step 5); computing a secular speed-proportional gain range (Step 6); computing a secular proportional gain range (Step 7); and selecting proportional gain values (Step 8).

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.

公开(公告)号：US20200083834A1

公开(公告)日：2020-03-12

申请号：US16613762

申请日：2018-05-18

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hiroshi FUJIWARA ,  Toru TAZAWA ,  Fumitake SAEGUSA

IPC: H02P23/04 ,  H02P29/40

Abstract: An electric motor control device performing feedback control of a state amount of an electric motor or a load and being capable of changing a control bandwidth of a feedback control system includes: a notch filter arranged in the feedback control system and having a filter coefficient which is changeable; a notch control section which changes a notch frequency as a center frequency of the notch filter to remove an oscillation component attributable to mechanical resonance related to the electric motor; and a control coefficient setting section which changes at least one of the control bandwidth or the filter coefficient of the notch filter in accordance with the control bandwidth and the notch frequency to stabilize the feedback control system.

公开(公告)号：US20170350404A1

公开(公告)日：2017-12-07

申请号：US15687042

申请日：2017-08-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuta SASAKI ,  Yasuyuki YOKOUCHI ,  Yasushi KATO ,  Toru TAZAWA

IPC: F04D27/00 ,  F24F7/007 ,  F24F11/04 ,  H02P6/06 ,  F04D25/06 ,  H02P23/14 ,  F24F11/00 ,  F04D25/08

CPC classification number: F04D27/004 ,  F04D25/06 ,  F04D25/08 ,  F04D27/00 ,  F05D2200/12 ,  F05D2200/14 ,  F05D2270/02 ,  F05D2270/3061 ,  F24F7/007 ,  F24F11/0001 ,  F24F11/30 ,  F24F11/74 ,  F24F11/77 ,  F24F2110/00 ,  H02P6/06 ,  H02P23/14 ,  Y02B30/746

Abstract: A motor controller of the present invention comprises units which obtain information indicative of a motor speed (ω) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (ω) and the motor torque (T); and a speed command generation section which generates a speed command (ω*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*).

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).