Grundfos improves pump motors to boost premium efficiency and intelligence
Grundfos has released what it claims to be one of the most intelligent and energy-efficient pump motors in the world.
The company has unveiled its new line of MGE and MLE motors – with integrated frequency converters up to and including 2.2 kW.
The MGE/MLE motors (models H & I) operate above the minimum requirements for 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 Ed. -1 (CD)1.
“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 generation of IE4 motors in Grundfos pumps driven electronically via a built-in, “intelligent” frequency converter. Frequency converters can automatically control motor speeds after actual demand, whereas standard pumps run at either full speed or off. The new motors are currently available for solutions up to 2.2 kW.
“We believe this is one of the most energy-efficient product in this market,” says Preben Poulsen. “We are one of the only suppliers 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 up to 45 kW for projects based on standard motor technology. The motors (3-45 kW for 2-pole and 2.2-37 kW for 4-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.
“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.
1As the only defined standard at present, Grundfos uses IEC 60034-30-1 Ed. 1 (CD) as a reference, even though the motor technology used in MGE models H & I is outside its scope. Thus, Grundfos cannot mark the motors’ nameplate with IE4, but instead uses the efficiency levels as a reference.