WHAT’S NEW BAUMA REVIEW
iVTInternational.com June 2019
30%
more
efficient
6
More from
Munich WITH SO MUCH GOING ON AT BAUMA
IT WAS IMPOSSIBLE TO SEE IT ALL IN
JUST ONE WEEK. HERE ARE SIX KEY
HIGHLIGHTS YOU MIGHT HAVE MISSED
ELECTRIC DRIVE
SENNEBOGEN 735 E
An electric drive timber-handling prototype was given its world
premier at Bauma in April, with the promise that it will go into
series production before the end of the year. Developed in
partnership with Bosch Rexroth, the electric drive on the
Sennebogen 735 E Pick & Carry machine increases
efficiency by 30% compared to the previously used
diesel-hydraulic drive, as well as reducing noise levels.
Consisting of two electric drive engines in the
undercarriage and a diesel-powered generator, the system
enables electric energy to be recuperated when taking the
foot off the accelerator or traveling down hill. All the work
process still operate hydraulically, driven by an efficient
Stage V diesel engine – it is the undercarriage travel drive
that is electric.
Sennebogen’s head of control technology Dr Peter Sekler
was project leader for the electric drive installation. iVT caught up
with him on the OEM’s stand at Buama Munich. “The challenge is
always that we have to get more efficient, people want to have
efficient machines with less diesel consumption and noise
reduction,” he said. “So we thought about how we could overcome
that problem. We knew that diesel-hydraulic drives aren’t that
efficient compared to electric components and so we did a
theoretical calculation of what would be the efficiency
increase if we switched to electric. We worked out that
it would be at least 30% without doing any calibration,
just baseline efficiency increase.”
Electric solutions in timber applications have
typically only been used for stationary work,
however like the other pick-and-carry
machines, this new vehicle will be able
to organize, sort and feed saw mills
covering significant mileage. The new
regenerative technology helps
make this mobile use possible.
The machine has already been
extensively field tested in the log
yard of a Bavarian saw mill.
/iVTInternational.com