This heat increases the resistance property of the windings. When placing a current on a motor phase we waste electricity to the form of heat. Where it becomes challenging is where we introduce an increase in temperature to the circuit. We then use ohms law, V = I x R to determine the resistance value as we will know the voltage across the motor and the current will be the same in the entire circuit. In this case we add an additional load in to the circuit to reduce the current to an acceptable level. The reason we would to do this is common multi-meters do not have the sensitivity to measure milliohms. We can measure the resistance of the motor winding by introducing another resistance component to a circuit. Measuring Brushless Motor Winding Resistance However, we can determine the motor using inexpensive household tools. The wasted energy is converted to heat and this energy does not provide any form of work that contributes to our power output of the brushless motor in our RC vehicles. When power flowing through the wires are resisted due to the wire itself, it provides wasted energy. Every wire used in any application has a specific resistance per foot.
Ohms are the unit of measurement for resistance in electricity. Well, it is the same for wires and it is ideal for a motors resistance to be zero ohms. Unfortunately nothing in life provides 100% efficiency.
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