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

FA173702

4/04/2018

Issue:
Output Current is higher than Input Current to a Drive

Product Line:
All Variable Frequency Drives 

Environment: 
All Variable Frequency Drives

Cause: 
Basic Electrical Theory

Resoultion:  
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 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.