公开(公告)号：US20190121313A1

公开(公告)日：2019-04-25

申请号：US16091545

申请日：2017-04-24

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： MITSUTAKA OKURA ,  AKINOBU TOMITA ,  HIROSHI FUJIWARA ,  YOSHIAKI IKEUCHI

IPC: G05B19/19 ,  G05D3/00 ,  H02P5/56 ,  H02P6/08 ,  H02P6/16

Abstract: In a motor control system, a plurality of motor control devices for controlling motors and a controller are connected to each other via a communication line. The controller generates a communication signal including an operation command, and transmits the communication signal to the respective motor control devices in a predetermined communication cycle. The plurality of motor control devices includes two motor control devices in a first group and a motor control device in a second group. Each of the motor control devices in the first group includes a data transceiver, a motor controller, a corrector, and a synchronous timing generator. The data transceiver receives an operation command issued to the motor control device, and receives operation information in the motor control device in the second group. Based on the operation command, the motor controller generates a torque command signal for controlling the motor. The corrector generates a torque correction signal based on the operation information, and corrects the torque command signal. The synchronous timing generator generates a timing signal that matches pieces of process timing of the motor controllers in the first group with each other.

公开(公告)号：US20200014324A1

公开(公告)日：2020-01-09

申请号：US16321489

申请日：2017-07-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YOSHIAKI IKEUCHI ,  MITSUTAKA OKURA

IPC: H02P29/00 ,  H04L12/40 ,  H02P1/02

Abstract: A motor control device includes: a first communication unit that transmits or receives data to or from a motor; a communication disconnection determination unit that determines that the motor and the motor control device are in a disconnection state based on a fact that there is no reply from the motor within a prescribed period, and that determines that the motor and the motor control device have been restored to a connection state based on a fact that a reply from the motor to the motor control device has been restarted; and a replacement determination unit that obtains identification information from an identification information storage of the motor via the first communication unit and determines that the motor has been replaced, when it is determined that the motor and the motor control device have been restored to the connection state.