~ Why using a VSD can help save money and the environment ~
Variable speed drive (VSD) and motor specialist, WEG has published a new guide detailing how using a VSD can save money and protect the environment. The guide also offers application specific advice when choosing VSDs for fans, pumps, HVAC systems, and compressors. The resource titled, Guide to variable speed drive applications is available to download for free at www.weg-automation.com.
Energy savings are a headline benefit of VSDs, and the explanation for this characteristic lies with speed control. In applications where traditional belts or gearboxes are used to lower speed, the motor still runs at full speed, resulting in unnecessary energy loss.
WEG’s guide explains that VSDs can deliver precise speed control, including during start-up and stopping. In short, VSDs provide continuous and completely adjustable speed whenever required, from starting to stopping, for hours at a time.
Another major advantage of VSDs is that gradual acceleration of the motor from standstill promotes extended service life and reduced maintenance costs. In comparison, if not using a VSD, the motor will start instantly with a large current, which can be highly detrimental to motor longevity. WEG explains how these processes impact costs in its downloadable guide.
“The energy efficiency of VSDs is a common benefit across many motor applications,” explained Marek Lukaszczyk, Europe and Middle East marketing manager at WEG. “However, getting to grips with the application specific advantages takes specialist advice and that’s where our latest guide comes in.
“For example, in pump applications opting for a VSD can lead to enhanced flow and pressure control. The use of a VSD to control flow means no additional restriction is added to the piping, as is the case with a throttling valve. On the other hand, for compressor applications modern VSDs offer numerous safety features, like protection against power surges and short circuits, as well as STO (safety torque off) functionality. By opting for a drive offering such features, compressor original equipment manufacturers (OEMs) can avoid the requirement for certain electrical components that include motor circuit breakers and contactors, thus reducing costs.”
For further information about WEG’s VSD offering visit the company’s website. The informative whitepaper, Guide to variable speed drive applications, can be downloaded here.
