Computing Loss, Temperature, and Efficiency in Electric Motors
Application ID: 100881
This a continuation of the permanent magnet motor model available here . In this model, an heat transfer analysis has been performed to compute the temperature rise for various stator current and rotor speed. A detailed analysis on torque, and losses in iron and copper have then been performed for both the initial temperature, and taking into account the loss induced temperature rise. From this the efficiency map is extracted and it is shown how the efficiency decrease because of the temperature rise.
In addition, the model performs a check of instantaneous and average power balance, and efficiency map has also been compared to one obtained analytically by exploiting fits on torque, and losses.
More details and stories available here
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
- COMSOL Multiphysics® and
- AC/DC Module and
- either the CFD Module, or Heat Transfer Module
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.