VFD Sizing Calculator

Recommends the minimum VFD rated output current needed for a motor, accounting for duty type (Variable vs Constant Torque), ambient temperature and altitude derating — before you shop for a specific drive.

AAJappsEngineering Calculation Report

VFD Sizing Calculator

Generic manufacturer-typical VT/CT duty and temperature/altitude derating rates — see About panel

Generated

For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.

Motor

A
V

Application

%

Installation conditions

°C
m

Candidate VFD (optional check)

A
V

VFD sizing result

Duty multiplier1.00
Temperature factor1.00
Altitude factor1.00
Required output current71.5 A
Minimum VFD rated current71.5 A