savacontrols
how do they work?
SavaControls work by reducing the power when the motor is under part load,
but
still maintain the same speed, offering substantial savings but enabling
instant power
availability should full load be required. Motors do not
constantly require the same
power, an uncontrolled motor will keep on drawing
full power. Many systems are
also designed with unnecessarily large motors to
provide a safety margin, and so
produce even more waste.
SavaControls constantly monitor the motor load by comparing relative
phase angles
and the back emf. At part load, the apparent voltage to the
motor is reduced by
cutting the power up to 100 times every second reducing
magnetisation losses and
drawing much less current. SavaWatt offers a range
of units, including single and
three phase controls to handle up to 250 amps
per phase.
A report from the Cranfield Institute of Technology states “The results
of these tests
showed a considerable reduction in the power consumption in a
low load situation...
The maximum reductions observed approached 40%...”
Other tests have shown
reductions of as much as 50% in electricity
consumption, but in real life applications
average saving are 20% on single
phase, and 15% on three phase systems.
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applications
SavaControls can be fitted onto almost any AC induction motor. These are
found on
things like:
• Refrigeration
• Air-Conditioning units
•
Rocks Crushers
• escalators,
• conveyor belts
• mixing machines
to
name a few
