VFD Harmonic Current Calculator
Calculate per-drive and fleet harmonic RMS current from fundamental current, current THD, drive count, and an entered comparison reference.
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Motor current, torque, inertia, soft starter, bypass rating, VFD cable length, and drive load calculators.
Published Calculators
Motor Wye-Delta Current Calculator
Compare across-the-line and ideal wye-start current, reduction, and kVA from entered three-phase values.
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Motor Soft-Starter Current Calculator
Estimate across-line starting current, soft-start current limit, reduction, kVA, and comparison from entered motor values.
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Motor Torque From Power Calculator
Convert entered horsepower and speed into torque in lb-ft and N-m for the motor formula family.
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Motor Service Factor Load Calculator
Compare measured motor current with a service-factor current reference, utilization, margin, and nameplate percentage.
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Motor Multi-Speed Current Calculator
Estimate per-speed current from entered horsepower, efficiency, power factor, voltage, and phase values.
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Motor Feeder Voltage Drop Calculator
Estimate feeder running and starting-event voltage drop from aggregate current and a starting-motor scenario.
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Motor Horsepower From Torque Calculator
Convert entered torque and speed into mechanical horsepower and kilowatts for the motor formula family.
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Motor Branch Voltage Drop Calculator
Estimate running and starting voltage drop, terminal voltage, and approximate loss from entered motor branch-circuit values.
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Motor VFD Cable Length Calculator
Compare the entered VFD-to-motor cable run with the exact drive manual limit and show remaining margin and percentage used. It does not create a universal safe-length rule.
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Motor Reflected Inertia Calculator
Combine multiple load-inertia rows before an acceleration, braking, or drive-sizing review.
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Motor Acceleration Time Calculator
Calculate acceleration time from total inertia, starting and ending speed, and average net torque. The result supports a transparent timing review before drive or starter selection.
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