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New, powerful pump motor
Herborner Pumpenfabrik features tomorrow’s technology today with PM motors
More power through greater efficiency, lower operating costs thanks to high energy savings and fewer CO2 emissions due to reduced electricity consumption – these are the key features of the new technology utilised in the PM motors recently presented by Herborner Pumpenfabrik at the aquanale trade fair in Cologne, Germany.
Efficiency level already outperforms future requirements
With the PM motors (Permanent Magnet motors), Herborner Pumpenfabrik presented a new, highly efficient motor technology. PM motors are already now achieving efficiency levels that will be mandatory by law from the year 2015, and delivering constant motor efficiency performance that complies with the Premium Efficiency Class (IE3).
“PM motors do not just save enormous amounts of energy,” explained Wolfram Kuhn, Managing Director of Herborner Pumpenfabrik. “Their main advantage is that they enhance the degree of efficiency by up to 13 per cent. That is how they provide more power at lower cost. In addition, the technology is environmentally friendly due to its reduced use of electricity and thus lower CO2 emissions.”
Optimally suitable for swimming pool technology
PM motors are ideally suited for use in swimming pool technology because the frequency inverters needed to operate the PM motors are already being widely used in this field. With the new technology, swimming pool circulation pumps are driven efficiently, frequency-controlled and thus process-optimised.
The synchronous motor (PM motor) has several key advantages over the asynchronous motors mainly used in swimming pool technology. “Asynchronous motors are less efficient than synchronous motors because of the rotor slip. The smaller the asynchronous motor, the higher the losses and thus lower the efficiency,” explained Sascha Korupp, Technical Manager of Herborner Pumpenfabrik. “With their high degree of efficiency, PM motors provide an ideal alternative solution for this type of application.” The specified efficiency standards that motors will have to comply with depending on category in accordance with the IEC code in future (from 2011) is IE2. PM motors, however, feature a degree of efficiency that already now exceeds the requirements of IE3.
The proof of energy efficiency stacks up
The aforementioned Herborner Pumpenfabrik graphically demonstrated to trade fair visitors a test stand that has been exclusively designed to prove the efficiency of PM motors. In a direct comparison, three identical pumps were driven each using different motors (eff2 – eff1 and IE3). The active power proved in the rated output range of the motors that the PM motor could save a handsome 13% compared with the eff2 motor, and around 6% compared with an eff1 motor. Those who thought this was still too little couldn´t believe their eyes as soon as the pump was operated in the partial load range. This can sometimes be the case if the system demands such an operating point (as pumps do not always drive in the points which have been defined) or if the motor is being driven at a reduced frequency for energy reasons. The savings on the display were increased to 30%! The reason for this is the behaviour of the motors in this power range. Alongside the reduced loss of iron and copper, the synchronous motor was able to counter any loss of slack here too!
An investment that quickly pays off
The current high cost of electricity means the additional investment in the new technology soon pays off. If a swimming pool water pump runs at an average of 8,000 hours per year, the higher investment pays for itself in less than 18 months (depending on the motor capacity and the operating point).
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Approved; we wish to receive a specimen copy
Photos: Herborner Pumpenfabrik; printing is approved in connection with this press release
Caption:
Querschnitt_PM_Motor.jpg
PM motors, here seen in the cross-sectional view, feature a high degree of efficiency.
UNIBAD_PM-Motor.jpg
UNIBAD is one of the first pump series from Herborner Pumpenfabrik to be equipped with the new PM motor technology.
PM_Berechnung_Wirkleistung.jpg
The pump characteristic curve illustrated here compares the electrical power consumption (effective power) of a PM motor with that of an asynchronous motor (3 kW driving power). The PM motor
has a far lower consumption level.
Responsible for the content:
Herborner Pumpenfabrik
J.H. Hoffmann GmbH & Co. KG
Littau 3-5
35745 Herborn, Germany
Tel: +49 (0) 2772 933-0
Fax: +49 (0) 2772 933-100
E-mail: info@herborner-pumpen.de
www.herborner-pumpen.de
Contact person:
Sascha Korupp, Technical Manager
General press enquiries / graphical material:
Welke Strategie GmbH & Co. KG
Anja Oerter
Garnisonsring 33
57072 Siegen, Germany
Tel: +49 (0) 271/3135-403
Fax: +49 (0) 271/3135-499
E-mail: a.oerter@welke-consulting.de |
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