US 12,251,825 B2
Demolition robot with control and monitoring function to avoid thermal damage to a motor comprised in the demolition robot
Johan Grahn, Skelleftehamn (SE)
Assigned to BROKK AKTIEBOLAG, Skellefteå (SE)
Appl. No. 17/753,819
Filed by BROKK AKTIEBOLAG, Skellefteå (SE)
PCT Filed Sep. 15, 2020, PCT No. PCT/SE2020/050859
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/054884, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 1951059-3 (SE), filed on Sep. 19, 2019.
Prior Publication US 2022/0339777 A1, Oct. 27, 2022
Int. Cl. H02P 29/60 (2016.01); B25J 5/00 (2006.01); B25J 13/08 (2006.01); B60L 1/00 (2006.01); E04G 23/08 (2006.01)
CPC B25J 5/005 (2013.01) [B25J 13/087 (2013.01); B60L 1/003 (2013.01); E04G 23/082 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A demolition robot, comprising,
a cable for energy supply to an electric motor comprised in a demolition robot, wherein said cable is intended to be connected to an electric three-phase network on site,
a pump that is powered by the electric motor for generating a hydraulic flow to
each consumer comprised in or connected to the demolition robot, wherein the motor
is activable with varying thermal load values that depend on current consumer's need for hydraulic power,
one or a plurality of measurement means,
a control unit arranged to receive information about the thermal load on the motor from each measurement means, determining one or a plurality of
different partial thermal damage values that are configured to arise on the motor at different thermal loads on the motor, wherein:
the control unit is adapted to compare one or a plurality of the partial thermal damage values with a normative partial thermal damage, and via an actuator comprised in the demolition robot adapted to limit the thermal load on the motor to a maximum allowable thermal load value, if one or a plurality of the partial thermal damage values exceed the normative partial thermal damage by a predetermined value.