When
seeking to maximize the energy performance of a machine drive, it is not enough
simply to select the most energy efficient components. Correct dimensioning is
critical, and complex interactions between components mean that the system as a
whole must be carefully designed. Attention must also be paid to the control
software, which plays a key role in availability and can therefore have a major
impact on overall energy efficiency.
A large Toilet paper machine
drive can consume up to 30 MW of power. With production running continuously
for very long periods, even a relatively small incremental improvement in
energy efficiency can produce considerable savings over the long term. Variable
speed drives can produce remarkable increases in energy efficiency in certain
applications by adjusting the speed of the motor to match the demands of the
process.
Another way to save energy for
toilet paper machine is regeneration. In applications with successive
acceleration and deceleration cycles, regenerative drives produce electricity
during the braking phases and feed it back to the network. If the machine can be liquid cooled,
which can dramatically reduce the energy consumed in air conditioning and
cooling electrical rooms.
Liquid cooling can decrease energy losses to the air
within the electrical room by as much as 98 %. Other advantages of liquid cooling
include a higher power density and compact drive cabinets, and higher protection
class enclosures offer increased options In order to optimize the energy efficiency
of a toilet paper machine drive it is important to look at the system as a
whole. This is because efforts to boost the efficiency of a single component in
isolation may end up causing increased losses elsewhere.
It is therefore crucial to understand how
the type of power supply, VSD switching frequency and output voltage, and the
motor design, affect total system efficiency. Achieving optimum energy efficiency
involves much more than simply comparing the catalog values.
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