# Blog

## Can I calculate the VFD energy savings?

To calculate VFD energy savings (Energy required by motor at full load, synchronous speed) minus (energy required by load at a specific operating point) minus (drive losses at that same operating point) minus (harmonic losses at that same operating point) Take the result (for a given operating point) multiply by (energy cost - usually in \$/kwh)

## How does VFD used in energy saving?

• With a VFD, the output of the system (air supply in this case) is controlled by directly changing the speed or torque of the motor. At low demand the motor runs slowly and the power consumption decreases in proportion to the demand resulting in increased efficiency and energy savings.

## Does VFD efficiency can be measured as inverter?

• Does VFD efficiency can be measured as inverter? In PV inverters there is a good reason to have the maximum inverter efficiency. Instead, in the combination VFD (inverter + motor) it is not interesting to know exactly the inverter efficiency. In certain conditions it is possible that inverter efficiency is lower but motor efficiency is better....

## Can I calculate the VFD energy savings?Can I calculate the VFD energy savings?

To calculate VFD energy savings (Energy required by motor at full load, synchronous speed) minus (energy required by load at a specific operating point) minus (drive losses at that same operating point)

## How does VFD used in energy saving?How does VFD used in energy saving?

With a VFD, the output of the system (air supply in this case) is controlled by directly changing the speed or torque of the motor. At low demand the motor runs slowly and the power consumption decreases in proportion to the demand resulting in increased efficiency and energy savings.

## Does VFD efficiency can be measured as inverter?Does VFD efficiency can be measured as inverter?

Does VFD efficiency can be measured as inverter? In PV inverters there is a good reason to have the maximum inverter efficiency. Instead, in the combination VFD (inverter + motor) it is not interesting to know exactly the inverter efficiency. In certain conditions it is possible that inverter efficiency is lower but motor efficiency is better....