Magnetics Business & Technology - January/February 2023 - 18

RESEARCH & DEVELOPMENT
Grundfos E-Motors Electrify Pumping Systems with Energy Efficiency
Big energy savings at William Grant & Sons distillery in UK
Using motors designed and produced in-house, global pump
manufacturer Grundfos is bringing new energy efficiency and
capabilities to pumping systems for a broad range of applications,
many of which were once were the domain of hydraulic technology.
Its MGE E-motors -- permanent magnet synchronous motors
(PMSM) designed especially for frequency converter operations
and optimized for pump applications and high part-load efficiency
-- are the company's most energy efficient yet.
When combined with new digital intelligence, the motors are powering
pump systems that are registering dramatic improvements
in energy efficiency and performance in operation at diverse sites
that regularly handle large volumes of water such as commercial
and residential buildings, and industrial facilities like the Williams
Grant & Sons distillery in the UK, maker of the famed Glenfiddich
single malt whiskey and other iconic global brands.
Commenting on the growing focus and adoption of E-Motors,
Markus Brandstetter, chief technology officer of Grundfos, says:
" Digital transformation is inevitable across the various segments
and we at Grundfos are proud to pioneer in creating the products
and digital solutions of the future. Our focus on developing IE5
E-motors is strategic not only for our business, but we see that it
is a critical solution to alleviate the world's energy and climate issues.
E-motors are known to not only improve the efficiency of the
entire system but also help in reducing energy consumption and
helping us mitigate climate change. This is what we push further
to the benefit of our customers and end-users in reducing cost
and CO2 emissions. "
18 Magnetics Business & Technology * January/February 2023
The PMSM motor has a built-in frequency converter that enables
variable-speed operation with benefits in pump applications ranging
from energy savings, process control, extra functionalities,
built-in motor protection, higher performance and more compact
pumps, reduced water hammer due to long ramp times and low
starting currents.
This results in lower energy and lifecycle costs. Adjusting the
speed of the pump based on demand, rather than throttling the
system flow with a valve, also results in no excess pressure causing
stress in the system and noise in the valve due to cavitation
and reduced power consumption due to lower pump speed. The
motors are currently utilized in a wide range of its pumps including
multi-stage pumps, single-stage pumps and booster systems.
It is said that as much as half of the world's electricity is consumed
by motors. Motor-driven systems in the industry sector
alone consumes 64% of the electric energy, while the commercial
sector consumes 20% and the residential sector consumes 13%.
There is a growing focus on improving the efficiencies of motors
and reducing energy consumption to meet the carbon emission
targets around the world.
The International Efficiency (IE) standards stipulate the energy
efficiency and basically has set five levels of motor efficiency: IE1
to IE5. The highest efficiency level being IE5 the 'Ultra-Premium
Efficiency'. These IE codes serve as a reference for governments
who specify the efficiency levels for their minimum energy performance
standards for motors in their respective countries.
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