US 12,318,945 B2
Robot system and method for predicting life of regenerative resistor
Yoshiki Santo, Kobe (JP); Yasunori Oyama, Kobe (JP); and Jun Kanzaki, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 18/019,015
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed Jul. 28, 2021, PCT No. PCT/JP2021/027941
§ 371(c)(1), (2) Date Jan. 31, 2023,
PCT Pub. No. WO2022/025130, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-130829 (JP), filed on Jul. 31, 2020.
Prior Publication US 2023/0211502 A1, Jul. 6, 2023
Int. Cl. B25J 9/16 (2006.01); B25J 19/00 (2006.01)
CPC B25J 9/1674 (2013.01) [B25J 19/0008 (2013.01); B25J 19/0054 (2013.01); B25J 19/0066 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A robot system comprising:
a robot including a joint;
a motor provided at the joint;
a regenerative resistor that consumes a back electromotive force generated by rotation of the motor as heat;
a memory storing a database in which life values representing a remaining life of the regenerative resistor are associated with respective proportion values representing a proportion of time during which the regenerative resistor has consumed heat, the values having been stored in advance; and
a controller configured or programmed to:
acquire a period of time during which the regenerative resistor is consuming heat within one operational cycle of the robot;
based on the acquired period of time, determine a proportion of the time of the one operational cycle that the regenerative resistor is consuming heat;
compare the determined proportion to the proportion values in the database to determine the remaining life of the regenerative resistor; and
output the determined remaining life of the regenerative resistor.