How can the input current to a Variable Speed Drive be less than the output current?


20 July 2022

Output Current is higher than Input Current to a Drive

Product Line:
All Variable Frequency Drives 

All Variable Frequency Drives

Basic Electrical Theory

The input current may be less than the output current because the output voltage of the drive may not be equal to the input voltage.
A drive is a power converter.  The power in (Volts x Amps) will be approximately equal the power out (Volts x Amps). 
When running at less than full speed the output voltage will be lower than the input voltage, which means the output current may be higher than the input current.