Motor control device

Patent metadata

Field	Value
Publication number	US-10644619-B2
Application number	US-201716071113-A
Country	US
Kind code	B2
Filing date	Mar 27, 2017
Priority date	Mar 29, 2016
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A disclosed motor control device includes: a PI controller which controls a velocity of a motor; an input unit which receives specification information including information of a weight and a center of mass of a tool; a calculation unit which calculates a gravitational torque based on the specification information; a storage which stores the gravitational torque output from the calculation unit and an integral value output from the PI controller, and outputs the gravitational torque and the integral value in response to a break signal; and a selection unit which sets, to the PI controller, the integral value output from the storage, according to a collision sensitivity input from the input unit.

First claim

The invention claimed is:

1. A motor control device comprising:
a proportional-integral (PI) controller configured to control a velocity of a motor;
an input unit configured to receive specification information including information of a weight and a center of mass of a tool;
a calculation unit configured to calculate a gravitational torque based on the specification information;
a storage configured to store an integral value output from the PI controller, the storage being further configured to store the gravitational torque output from the calculation unit and to output the gravitational torque and the integral value in response to a break signal allowing to switch off the power supplied to the motor; and
the motor control device further comprising
a selection unit configured to trigger, through the break signal, the setting of the integral value depending on a collision sensitivity provided through the input unit, and to provide the PI controller with the integral value,
wherein the collision sensitivity is configured to be set by a user and a collision detection threshold is determined according to the collision sensitivity.

2. The motor control device according to claim 1 ,
wherein the specification information includes load information that allows a determination of whether or not the tool is attached, and
the selection unit being further configured to set the integral value as being:
an unloaded gravitation torque, when the load information allows a first determination that the tool is not attached, or
a loaded gravitational torque, when the load information allows a second determination that the tool is attached.

3. The motor control device according to claim 1 ,
wherein the specification information includes arbitrary specifications.

4. The motor control device according to claim 2 , wherein the specification information is arbitrarily set.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamamoto Ryosuke
• Nakata Hiroyuki
• Hashimoto Atsumi
• Honuchi Yasuyoshi

Classifications

• H02P1/029 Primary

  Restarting, e.g. after power failure · CPC title

• H02P23/16

  Controlling the angular speed of one shaft (H02P23/18 takes precedence) · CPC title

• G05B2219/50391

  Robot · CPC title

• H02P23/0004

  Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control · CPC title

• H02P2205/07

  Speed loop, i.e. comparison of the motor speed with a speed reference · CPC title