Electric drives, which represent the main energy consumers in the field of industrial production, offer saving potentials of approximately 70 %. The energy-efficient solution for the operation of electric drives depends on the application, which therefore has to be accurately assessed as the first step.
The term fixed-speed drive refers to a motor which is continuously operated at its nominal speed. Fixed speeds are realized by switching devices such as SIRIUS contactors, motors or soft starters. Besides their favorable cost-performance ratio, these devices are particularly characterized by their low power loss. This results in minimized cooling expenditures in the service room or control cabinet. Soft, star-delta or special motor starters allow for soft motor start-up, which reduces electric and mechanical peak loads by up to 60%, thereby reducing the load on the motor, the application and the energy distribution network.
A topic frequently discussed when considering the energy efficiency of complete systems or individual drive trains is the question of the best drive solution. The German Federal Institute for Materials Research and Testing (BAM) has stated its position with respect to EU Regulation (EC) 640/2009.
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