Page 4 - Parker - Energy saving technologies or motor driven hydraulics

Energy saving solution for press

Improved efficiency in hydraulic systems with

electronic control technologies

In many industrial processes Example of energy saving Parker supports you through
involving a hydraulic pump, an Tests run on a hydraulic press all aspects of the design and
unregulated motor running at system clearly show that implementation of frequency
maximum speed is probably substantial savings on energy are controlled hydraulic systems
wasting energy. - planning, measuring existing
possible using the Parker variable
speed drive to reduce motor speed equipment, rebuild and startup.
Reducing the motor speed during during parts of the machine cycle
low flow demand or parts of the with low flow demand. Plus, by
cycle requiring pressure to be held over-speeding a pump at times of
can achieve significant energy low pressure demand, a second
savings. By using Parker SSD’s pump could be eliminated. The
variable speed drive technology, result in this case was an average
instant savings can be realized.
power need of just 34 HP (25kW)
compared to 50 HP (38kW) using
By automatically adapting the an unregulated pump, over the
pump’s speed to match changes entire press cycle.
in demand, Parker’s variable speed
drives are the perfect addition to
many hydraulic systems.

VFD controlled hydraulic system
Conventional hydraulic system

Electric Motor Electric Motor

+ 50 HP + 34 HP

Hydraulic Pump Hydraulic Pump Hydraulic Pump VFD
= 38kW x 7200h x $.10/kWh $27,360/Year = 25kW x 7200h x $.10/kWh $18,000/Year

Total annual energy saving = $9360/Year

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