www.industryemea.com
02
'11
Written on Modified on
NORD Drivesystems
Energy efficient drive systems from NORD
More than two thirds of the energy consumed in industrial applications goes into the operation of electric drive technology. Since an electric motor’s energy consumption makes up about 98% of its total cost of ownership, investment in efficient drive technology is more than worthwhile. Nord offers energy efficient drive systems, including Unicase gearboxes with regenerative breaking, IE2 motors, and frequency inverters that automatically reduce magnetization when the motor is operated under partial load. All together it reduces energy consumption by a half compared to former solutions.
Energy saving potential does not stop at optimizing the consumption of individual motors. Prudent efficiency measures should also consider the complete drive system together with the application process. NORD DRIVESYSTEMS has many years of experience in developing efficient drive technology and customized energy saving concepts. Apart from optimizing materials and the design of its electric motors, NORD employs such technologies as high-frequency operation, automatic magnetization adjustment, energy recovery, and intermediate circuit coupling.
Regenerative braking
While conventional frequency inverter applications discharge the braking energy as heat, more efficient and eco-friendly drives reuse this excess energy via intermediate circuits or regenerative braking and thus reduce the power drawn from the mains supply.
Intelligent control during partial load operation
Intelligent control is another way to save energy. For asynchronous motors, frequency inverters generally maintain the magnetic flux level required for yielding the full torque over the whole speed range, thus causing unnecessary losses during partial load operation. NORD’s SK 200E, SK 500E, and SK 700E-type frequency inverters can save resources by automatically reducing magnetization when the motor is operated under partial load for potential energy savings of up to 30 %.
IE2 motors for energy saving drive solutions: new standard-compliant units offer additional benefits
For its new range of IE2 motors, NORD uses more active material in the stator and higher quality sheet metal that helps reduce losses. Furthermore, an increased copper filling factor and a reduction in the size of the coil cores not only result in increased efficiency, but also in a reduction of waste heat and a prolonged service life for the drive technology. In addition, greater power reserves allow for the use of smaller motors for many applications.
Illustration: Integrated energy saving concepts from NORD: highly efficient NORD UNICASE gearboxes, new motors with energy efficiency class IE2, drive electronics
Regenerative braking
While conventional frequency inverter applications discharge the braking energy as heat, more efficient and eco-friendly drives reuse this excess energy via intermediate circuits or regenerative braking and thus reduce the power drawn from the mains supply.
Intelligent control during partial load operation
Intelligent control is another way to save energy. For asynchronous motors, frequency inverters generally maintain the magnetic flux level required for yielding the full torque over the whole speed range, thus causing unnecessary losses during partial load operation. NORD’s SK 200E, SK 500E, and SK 700E-type frequency inverters can save resources by automatically reducing magnetization when the motor is operated under partial load for potential energy savings of up to 30 %.
IE2 motors for energy saving drive solutions: new standard-compliant units offer additional benefits
For its new range of IE2 motors, NORD uses more active material in the stator and higher quality sheet metal that helps reduce losses. Furthermore, an increased copper filling factor and a reduction in the size of the coil cores not only result in increased efficiency, but also in a reduction of waste heat and a prolonged service life for the drive technology. In addition, greater power reserves allow for the use of smaller motors for many applications.
Illustration: Integrated energy saving concepts from NORD: highly efficient NORD UNICASE gearboxes, new motors with energy efficiency class IE2, drive electronics
