Grundfos improves pump motors to boost premium efficiency and intelligence
Grundfos has released what it claims to be the most intelligent and energy-efficient pumps in the world.
The company unveiled the first models of its new line of MGE and MLE pump motors – with integrated frequency converters up to and including 2.2 kW – at the ISH 2013 trade fair in Frankfurt.
The MGE/MLE motors operate above the new IE4 motor efficiency level as defined by the International Electrotechnical Commission (IEC) in the upcoming standard for rotating electrical machinery, IEC 60034-30-1 (CD).
PHOTO: The MGE and MLE upgrades are the first in a new generation of Grundfos IE3 asynchronous motors. They operate above the new IE4 motor efficiency level as defined by the International Electrotechnical Commission.
“Customers will get a standard product that consumes less energy than ever seen before within these kinds of motors,” says Preben Poulsen, Grundfos Program Manager of Motors & Drives.
The MGE/MLE upgrades are the first in a new generation of IE4 asynchronous motors in Grundfos pumps driven electronically via a built-in, “intelligent” frequency converter. The complete Grundfos range goes up to 22 kW. Frequency converters automatically control motor speeds after actual demand, whereas standard pumps run at either full speed or off.
“We believe this is the most energy-efficient product in this market,” says Preben Poulsen. “We are the only supplier with a motor that runs with efficiency above IE4 level including the losses in the frequency converter.”
Up to 45 kilowatt
Meanwhile, Grundfos will also offer IE4 motors on its industrial pump lines up to 45 kW based on standard motor technology. The motors (3-45 kW for 2-pole and 2.2-37 kW for 3-pole) will be supplied by Siemens via a special agreement. Grundfos is the first company to be able to offer these motors with its products, says Preben Poulsen. Siemens is one of the world’s most respected producers of standard motors.
These motors can be connected directly to the power supply or coupled to standard frequency converters.
PHOTO: The Grundfos Hydro MPC booster system
“Customers will get a standard product that consumes less energy than ever seen before within these kinds of motors.”
Preben Poulsen, Grundfos Program Manager, Motors & Drives.
A step ahead
Preben Poulsen says the upgrades are just the beginning of a long, coming program of improved motor technology that stays well ahead of global motor regulations.
The current legislative demand for motor efficiency in Europe is IE2. In 2015 and 2017, Europe will increase its legislative demand to IE3.
PHOTO: The Grundfos CME end-suction pump carries the new motor technology.