Electric motors are essential for powering a huge number of
industrial processes, including mixers, conveyors and fans. However, they do
have one shortcoming in that they are only able to run at their rated speed.
So what happens if your application requires the motor’s
running speed to vary at different times? For example, in processes where a
range of items are made using the same machinery, such as food production, the required
speed will fluctuate depending on what’s being made. Replacing the electric
motor every time the process changes is impractical, so another solution must
be found. That’s where the variable-speed drive comes in.
A variable-speed drive (often known as a variable-frequency
drive, adjustable-speed drive or inverter) is a device which allows the user to
control the output speed of an electric motor.
Variable-speed drives also allow motors to be started smoothly,
which can help reduce belt, gear and bearing wear which occurs during across-the-line
starting (the application of full line voltage).
This clever piece of equipment offers users the ability to reduce
energy costs by as much as 60% and significantly increase system production
efficiency. For a 90 kW motor in continuous duty, this translates to a £9,000
annual saving - meaning return on investment is possible within a year.
Sound useful? To speak with one of our expert engineers
about installation, start-up and maintenance of ABB
variable-speed drives, give us a call on 01621 868138 or email info@gibbonsgroup.co.uk.
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