The use of energy-efficient motors is standard in new buildings as well as in newly planned production facilities – the demonstrable cost-effectiveness indicates why, as well as the equally clear specifications of the legislature. With the MGE motor, Grundfos has now developed a particularly efficient permanent magnet synchronous motor series with IE5 classification.
However, it is often not enough to consider simply the efficiency of a motor or a pump; it is better to evaluate the efficiency of the overall system. The importance of well-designed control algorithms for pump operation and the way the pump responds to changes tends to be underestimated.
The MGE motor from Grundfos, developed and manufactured in-house, stores these control algorithms in the integrated micro frequency converter. This smart converter receives sensor-assisted data on the actual status and regulates the pumping system by controlling the speed. Even the classic MGE motors easily exceed the highest efficiency requirements according to the EU Ecodesign Directive (IE3 up to 22 kW).
Grundfos has now developed a particularly efficient permanent magnet synchronous motor (PMSM) series: the MGE-PM motor. This motor will be available with performance ratings from 0.75 to 11 kW and IE5 classification, which is the world’s highest energy efficiency classification for electric motors (according to IEC 60034-30-2 for variable speed motors).
Further 20 % loss reduction
Losses are now 20 % less again compared to IE4 motors. This results in lower energy consumption and significantly reduced lifecycle costs. IE5 specifically means that the investment in a Grundfos pump equipped in this way will pay for itself even faster than before. MGE-PM motors are used in the following pump series:
- Inline TPE pumps
- Standard (NKE) and close-coupled pumps (NBE) in versions according to EN 733 as well as in accordance with DIN EN ISO 2858 for transporting larger quantities of water
- Multi-stage CRE vertical high-pressure pumps available in grey cast iron, stainless steel or titanium
- Booster systems in the Hydro MPC, Hydromulti B/E, Hydro-Solo E and CMBE series based on CRE or CME pumps
- Horizontal CME centrifugal pumps for confined installation conditions
- Immersible MTRE pumps
Many built-in pump features are available, depending on the application, thanks to various function modules (basic, standard and extended) with a corresponding number of inputs and outputs as well as additional interfaces. The range extends from simple process control with constant parameters (pressure/volume flow/filling level/temperature) to complex control variants. The Autoadapt and Flowadapt functionalities are integrated exclusively for the TPE3 inline pump. The Autoadapt function allows the pump to check the system conditions regularly and adjust the proportional pressure characteristic independently. The pump setpoint is automatically adapted, even if the system conditions are not accurately known (for example, when replacing an existing pump). Flowadapt enables the pump to monitor the flow rate continuously and prevent it from exceeding the maximum value. The proportional pressure controller is based on a linear or quadratic function and provides a further energy saving.
These motors are also highly communicative: the (plug-in) CIM communication modules support data transmission via fieldbus standards, e.g. Profibus, Profinet, Modbus or SMS/GSM/GPRS over the wireless GSM/GPRS connection or with Grundfos Remote Management. The “Grundfos Go” app permits pump control from a smartphone with access to the operating data of the pump and the system.
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