I am looking at and testing different scenarios on a blower unit. I found that if I cover the return duct, I have greatly UNLOADED the motor.. the rpm rises and with this, so does the inductive reactance/back EMF which actually drops the amps to the motor. If I am looking at this correctly, the load is less, the amp draw is less, but physically the heat of the motor is rising. What is causing this heat rise??? Just curious because I'm missing something here..apparently.
Google " Service Factor " ( regarding heat and motors ) . Isn't general supposed to be non tech ? Oh well , yeah service factor can be fun...the more heat you put on me the less I work , lol ( snare / splash ).