Energy-efficient drives with intelligent functions
Depending on the application and load profile, you can reduce your energy consumption with the intelligent energy savings functions of SINAMICS frequency converters.
In the ECO mode, the operating point of the motor in the partial load range is automatically adapted and optimized. This reduces motor losses, for example, with machines that do not require a high speed over the entire operating area.
Temporarily operated variable speed drives are switched to standby – the so-called Hibernation mode. Depending on the application, the drive is automatically reactivated.
The Bypass mode lets you electrically "bypass" the converter whenever the motor frequently operates in the nominal speed range. This allows you to avoid converter-related losses while increasing overall efficiency.
For pump, fan and compression applications with larger output, the entire power demand is distributed over several motors. Phased on and off switching over partially or fully regulated cascades in combination with inverters allows for energy-efficient drive systems.
Dynamic energy management in the DC link
When using converters with inductive drives, the energy is exchanged through the common DC link. Through the direct energy exchange from one converter to the other, the power loss within the system is minimized.
Reactive power compensation
Through the use of SINAMICS frequency converters with Active Line Modules, the capacitive and/or inductive reactive power in the machine can be reduced. As a result, the number of expensive reactive power compensation systems can also be reduced.
With dynamic reversing operations in single-axis and multi-axis systems, the kinetic energy available in the system is reused. Utilization of SINAMICS frequency converters results in an energy equalization across the common DC link.
Energy consumption values / saving counter
During operation, the actual energy usage value can be output. Also, using an energy saving counter, the saved energy accumulated during operating hours can be compared with a fixed speed application.
In conventional drive systems, the braking energy generated by the braking resistors is burned off. The SINAMICS G and S frequency converters with energy recovery require no braking resistors and feed the generated braking energy back into the line supply.