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Main >> Applications >> Sample problems

DC motor simulation - QuickField simulation example

This example is prepared by Bozena Boreta and Jacek Sosnowski

Engineering question

How to find torque characteristics of permanent-magnet DC motors?

Answer
Set up a plane-parallel QuickField DC Magnetics problem for a permanent-magnet DC motor and evaluate torque characteristics from computed field results.

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Typical applications
permanent-magnet DC motors, PM motor rotors, electric machine stators

DC motor simulation

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Simulation problem

Problem Type
Plane-parallel problem of DC magnetics

Geometry
DC motor simulation The calculations are performed to investigate the mechanical torque as a the function of the yoke thickness and the current density Rotor Steel yoke N S

Given
The model of DC electric motor with permanent magnets you can analyze for:

  • seven values of the steel yoke thickness s: 1 - 8 mm,
  • three values of the current density j.

Solution
The calculations are performed to investigate the mechanical torque (per 1 m depth) in the function of the yoke thickness and the current density (also other characteristics of materials). You can observe the saturation effect of the mechanical torque with the steel yoke growth and a deformation of the field lines with the current density growth. This information can be useful in a design process.

Results
DC motor simulation

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