公开(公告)号：US10715075B2

公开(公告)日：2020-07-14

申请号：US16328706

申请日：2017-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Fujiwara ,  Toru Tazawa ,  Fumitake Saegusa

IPC: H02P29/50 ,  H02P4/00 ,  H02P23/04 ,  H02P29/032 ,  H02P29/00 ,  H02P6/10 ,  H03H7/12

Abstract: A motor control device is configured to feedback-control state quantity of a motor or a mechanical load, and the device includes a first notch filter disposed inside a feedback control system and configured to change a frequency component to be removed, a first notch controller configured to change a first notch frequency as a center frequency of the first notch filter, a change rate calculator configured to successively calculate a notch frequency change rate indicating a change amount per unit time of the first notch frequency, and a change rate monitor configured to output a signal indicating that the notch frequency change rate has a value outside a first predetermined range when the notch frequency change rate has the value outside the first predetermined range.

公开(公告)号：US10197986B2

公开(公告)日：2019-02-05

申请号：US15989980

申请日：2018-05-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toru Tazawa ,  Hiroshi Fujiwara ,  Masaru Nishizono

IPC: H02P6/14 ,  G05B19/35 ,  G05B19/19 ,  H02P23/00

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：US09929683B2

公开(公告)日：2018-03-27

申请号：US15328149

申请日：2015-08-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke Sonoda ,  Mitsuhiro Sakamoto ,  Toru Tazawa

IPC: H02P6/04 ,  H02P6/18 ,  H02P21/24 ,  H02P27/06

CPC classification number: H02P6/18 ,  H02P21/24 ,  H02P27/06

Abstract: Provided is a motor drive device which performs switching, with respect to a synchronous motor including a stator around which a motor winding is wound and a rotor holding a permanent magnet, from a synchronous operation in which the synchronous motor is synchronously driven to position-sensorless vector control in which a current supplied to the motor winding is controlled based on a position of the rotor. During the synchronous operation, the present motor drive device calculates, by estimation, an induced voltage error based on the detected current and voltage, performs control of an amplitude of a current instruction such that an error, of a target induced voltage, calculated based on an estimated induced voltage and based on an internal angle becomes equal to the induced voltage error, and switches the mode to the sensorless mode after the error is reduced to be within a range of a predetermined value. Further, by gradually reducing the current instruction during the synchronous operation, the absolute value of the induced voltage error is reduced to be within a range of the predetermined value.