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Induction Motor Model Generator

See a generated example:
Induction motor magnetization curve →
Induction motor magnetization curve

This online tool calculates the main dimensions, winding parameters, and slot geometry of an induction motor from its basic design requirements.

The calculated design can be reviewed and adjusted before generating a set of human-readable JSON metafiles (.qfp, .qfs and .qfd). These metafiles can be processed by QuickField Builders to create a complete QuickField problem for further finite element analysis.

Motor Requirements

Enter the motor operating parameters and design assumptions used for the initial calculation.

Rated Parameters
Rated power, PnkW
Line voltage, V1V
Frequency, fHz
5060
Poles, 2p—
Power factor, cos(φ)
Efficiency, η
Motor Proportions
Stack aspect ratio,
λ = Stator Length / Stator Diameter
1.5
ShortLong
Steel Magnetization Curve
Design Assumptions and Technological Constraints
Maximum stator winding wire diametermm
Maximum number of parallel wires
Minimum stator tooth widthmm
Target stator current densityA/mm²
Target rotor bar current densityA/mm²
Target stator tooth flux densityT
Target rotor tooth flux densityT
Target stator back-core flux densityT
Lamination factor, KFe

Calculated Motor Design

Review and, if necessary, adjust the calculated motor design.

Calculate the motor design in Step 1 to populate this section.
Main Dimensions
Stack length, Lmm
Stator bore diameter, Dismm
Stator outer diameter, Doutmm
Air gap length, gmm
Stator Winding
Slots per pole and phase, q
Slots number, Ns = m * 2p * q,
where m=3 phases
Coil pitch, y
Coil pitch correction, Δy

Phase color notaion: A - X, B - Y, C - Z.

Stator Slots

Stator slot type:

d1, mmd2, mm
h1, mmh2, mm
s1, mms2, mm
Tooth width, bts, mm
Rotor Slots

Rotor slot type: Entire slot area is filled with conductor.

Number of rotor slots, Z2
d1, mmd2, mm
h1, mmh2, mm
s1, mms2, mm
Tooth width, btr, mm

Generate JSON Metafiles

Export the calculated motor design for QuickField Builders.

Calculate the motor design in Step 1 before generating metafiles.
Generated Metafiles
  • .qfp Problem definition
  • .qfs Motor geometry
  • .qfd Materials, sources, and boundary conditions

QuickField Problem Builder uses these JSON metafiles to create a complete QuickField problem. The files remain human-readable and can be reviewed or modified before building the problem.

Magnetization Current Model

Generate a nonlinear AC Magnetics model for calculating the motor magnetization current and checking magnetic saturation in the stator teeth, rotor teeth, and magnetic cores. The model uses the selected nonlinear B-H curve, calculated motor geometry, and balanced 3-phase stator winding currents at the supply frequency, with the rotor at synchronous speed (zero slip, so no rotor bar current).

See Induction motor magnetization curve for a worked example of building this model into a full magnetization curve.

References:
1. Ion Boldea, Syed A. Nasar. The Induction Machines Design Handbook, Second Edition. Electric Power Engineering Series. Taylor & Francis, 2009.