公开(公告)号：US20190158006A1

公开(公告)日：2019-05-23

申请号：US15940968

申请日：2018-03-30

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Yasufumi YOSHIURA ,  Yasuhiko KAKU ,  Shouta KAWAHARA

IPC: H02P21/14 ,  H02P29/40 ,  H02P21/22 ,  H02P23/20 ,  H02P25/06 ,  H02P27/02

CPC classification number: H02P21/143 ,  H02P6/34 ,  H02P21/13 ,  H02P21/22 ,  H02P23/20 ,  H02P25/06 ,  H02P27/02 ,  H02P29/40

Abstract: A motor control device includes output command calculation circuitry and inertial load value calculation circuitry. The output command calculation circuitry is configured to calculate a motor output command, based on a motor acceleration command and an inertial load value indicative of a magnitude of inertia of a load on a motor. The inertial load value calculation circuitry is configured to calculate an estimated inertial load value with an adaptive observer, based on the motor output command and a motor actual output to be output from the motor, and configured to calculate the inertial load value, based on the estimated inertial load value.

公开(公告)号：US20190149068A1

公开(公告)日：2019-05-16

申请号：US15993757

申请日：2018-05-31

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Mitsujiro SAWAMURA ,  Shouta KAWAHARA ,  Tatsuaki WADA

IPC: H02P3/18 ,  H02J3/30 ,  H02J3/32 ,  H02J1/16

Abstract: A motor controller includes an AC-to-DC converter that converts AC power from an AC power source into DC power and supplies the DC power to a DC bus line, an auxiliary power source that charges the DC bus line with the DC power and discharges the DC power from the DC bus line, and a first inverter that controls power supply to a motor using the DC power from the DC bus line. The auxiliary power source includes a rotating electrical machine, a flywheel connected to the machine, a second inverter that supplies power to the machine using the DC power on the DC bus line and regenerates the power from the machine into the DC power on the DC bus line, and control circuitry that controls the second inverter to cause rotational angle velocity of the flywheel to keep positive correlation with bus-to-bus voltage of the DC bus line.