Tonymark, I'm not sure what is meant by "armature intended to overheat" either. Let me describe what our product does.
The current "classic" tilt head models (K45, KSM75, KSM90, KSM150) and the classic K5 bowl lift model have NO thermal protection device in them. Therefor, if overused, they will just keep heating up until the varnish insulation on the motor wiring begins to degrade, or smoke. For 70 years, our customers have learned by smell and touch (hot housing) when they have overused the mixer.
Our newer generation models (Tilt Head Accolade KN15E1X) and now all bowl lift models (except for the some stores that still carry the older K5) all have built-in thermal protection for the motor. If the mixer is overused, the thermal protector will trip and cut off the electricity. After it cools down, it will automatically reset, and you are up and running again, with no motor damage.