Why does an inverter compressor save energy?

The main feature of variable displacement compressors with inverters is the saving of electrical energy. While a traditional compressor has a 0-100% flow rate regulation, at load (where it absorbs 100% of the power) and at vacuum (where it absorbs 30% of the power) where the absorption is given by the average working in these two phases, in a variable flow compressor the power absorption is proportional to the revolutions of the electric motor.

direktgetriebene kompressor
With a compressor well dimensioned for the real consumption of the system, and that therefore does not work at 70-80% of the air demand, it is possible to obtain an energy saving of up to 30%.

In variable flow compressors, due to its proportional control system, the in-line pressure remains almost constant on the set value, unlike in traditional on/off controlled compressors where the pressure fluctuates between a minimum and a maximum (generally with ΔP=1.5 bar) due to the regulation of the line pressure switch. This allows the operating pressure to be set at least one bar less than in a traditional compressor, which is equivalent to a further saving of about 7% of electrical energy.


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