There are several factors affecting the energy savings
you’ll enjoy from a variable-speed drive, including the type of load being
driven. Here we look at the three main types of load.
Variable torque load
This load is typically found in centrifugal fan and pump
applications. They offer the greatest energy-saving potential of any other load
type, because a relatively small speed change results in a significant
reduction in power usage.
Constant torque load
Common constant torque load applications include conveyors,
agitators, crushers and air compressors. Unlike in variable torque loads, speed
changes correspond exactly with power consumption. So although potential energy
savings are not as high as with variable torque loads, they are still
significant enough to warrant consideration.
Constant power load
In this case the power consumed does not vary and the torque
is inversely proportional to the speed. Therefore, constant power applications
such as machine tool spindles seldom offer energy-saving potential via speed
reduction.
If you’d like more information on how Gibbons could cut your
costs and increase your energy efficiency with ABB drives,
give us a call on 01621 868138 or email info@gibbonsgroup.co.uk.
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