Nord Drivesystems has assembled a complete range of IE2 and IE3 motors that bring benefits of increased efficiency, less waste, reduced greenhouse gases, increased service life and reduced operating costs in compliance with the IEC60034-30 standard making IE2 energy efficiency class mandatory throughout Europe from June this year.

It is believed more than two thirds of the total energy spend for industrial automation is consumed by electric drive technology and that an individual electric motor’s energy consumption makes up about 98 per cent of its total cost of ownership over its average life. The IEC60034-30 standard will begin to ensure reduced energy consumption on a global scale. Further statutory initiatives for IE3 Premium Efficiency motors will come into force in the next few years.

However, it is Nord Drivesystems’ view that energy saving does not stop at optimising the consumption of individual motors but that practical efficiency measures and a ‘green’ approach should also be built into the complete drive system together with consideration for the overall application process. With many years experience in energy saving motors and drive technologies, Nord has developed innovative efficiency optimised drive features that include high-frequency operation, where asynchronous motors are operated with an output frequency which is higher than that of the mains in order to increase efficiency.

Intelligent control is another way to save energy. Nord’s SK 200E, SK 500E, and SK 700E frequency inverters are said to save resources by automatically reducing magnetisation when the motor is operated under partial load for potential energy savings of up to 30 per cent.

Whilst conventional frequency inverter applications discharge the braking energy as heat, more efficient and eco-friendly drives reuse this excess energy via intermediate circuits and regenerative braking, thus reducing mains power.