Robots with regenerative braking help to reduce energy costs

Yaskawa says its latest YRC1000 robot controls provide an important solution for the recovery of robot braking energy, and is offers this feature as standard on its larger Motoman robots with a payload upwards of 50kg.

The YRC1000 robot controls are able to convert kinetic energy from the down and sideways movements directly into 400V AC at 50 Hz and feed it back into the grid. Depending on the movement pattern of the application, the robot’s energy requirements can be significantly reduced.

Reducing energy consumption in today’s highly competitive industrial environment is likely to be higher on most, if not all of today’s manufacturers’ agendas, especially due to current higher energy costs. With automation playing an increasingly important role in many applications maximising the efficiency of robots will be of significant interest across all manufacturing sectors.

Features such as regenerative braking can make a big difference to the efficiency of robots, recovering braking energy and feeding it back into the power grid without the need for additional hardware.

In applications such as handling, palletising, joining and processing, industrial robots make many down or sideway movements during which the servomotors dissipate energy thereby potentially generating electricity. Up until now, in older or other robot models on the market, the resulting energy has been converted to waste heat by control technology through electrical resistance and lost to the environment. In the Yaskawa solution the electric energy is fed back into the operator network – without the need for additional hardware so it can be re-used.

The extent of savings obviously depends on the specific application and the robot’s individual movement patterns, although realistically savings ranging from 8 to 25% can be anticipated which may result in annual feed-ins of about 2,800 kWh, equivalent to around 1600 kg CO2 and £1200.

In addition, the slim and compact design of Motoman robots with low moving masses and fast application of brakes during movement intervals enables the active position control to be switched off when not in use which increase the potential for greater efficiency.

YASKAWA UK Ltd

Walworth Road
Newton Aycliffe
DL5 6XF
UNITED KINGDOM

+44 (0) 330 678 1990

sales.uk@yaskawa.eu.com

www.yaskawa.co.uk

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