The model compares the performance of the DC motor from the SimElectronics® library (without thermal effects) with an equivalent model written in the Simscape language (with thermal effects). The simulation results will show the performance degrading as heat is generated. The amount of degradation depends on how fast the heat can be removed from the motor. (See Readme.txt file for more details)
Updated for R2013b.
Minor edits in the comments section