Toshiba Toshiba Schneider Inverter Corporation

Inline duct fans [Fans, Pumps, Compressors]

 Merits of inverter drives

When you don't need 100% air-flow, you can decrease motor speed of "Inline duct fans".
In this case, it will save a lot of energy.

In generally,
Airflow: proportional to motor rotation
Load torque: proportional to the second power of motor rotation
Energy: proportional to the third power of motor rotation

ex. Motor rotation is changing 1500min-1 to 1350min-1 (-10%).

Airflow: 90%
Load torque: 81%
Necessary power: 72.9%

Actual necessary power:
72.9% / [inverter efficiency(95%)] = 77%.

Constant torque and variable torque characteristics

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