Motor winding design,
done right.
Six professional-grade engineering calculators — winding design, wire sizing, slot analysis, Newton-Raphson equivalent circuit extraction, T-circuit performance analysis, and rotor eccentricity testing — with 1,200+ reference motors and full calculation history.
Basic Winding
Compute synchronous speed, winding factors (Kd, Kp, Kw), flux density, turns per coil, and wire CMA.
Advanced Winding
Add slot geometry — width, depth, insulation — for slot fill factor analysis and packing efficiency.
Wire Selection
Select optimal AWG or metric wire based on current and desired current density with a ranked comparison table.
NR Parameters
Extract R1, X1, R2, X2, Xm, and Rm from nameplate and no-load data using Newton-Raphson iteration. Generates torque-speed curves and performance at multiple load points.
Equivalent Circuit
Analyse the T-equivalent circuit at 50%, 75%, and 100% load. Two methods: Vectorial and IEEE 112-B. Full torque-speed curve and phasor diagram included.
Rotor Eccentricity
Detect shorted turns and air-gap non-uniformity per IEEE 115. Enter per-pole voltages and get an instant GOOD / QUESTIONABLE / BAD diagnostic with per-pole deviation breakdown.
Every formula you need
Built from first principles for electric motor rewinding and design validation. All calculations run instantly in your browser — precise, reliable, and fast.
Create accountSave every calculation
All your calculations are saved to your account. Name them, browse your history, and reload any result at any time.
View pricing