Questions on heat

[Serum]

The reason for the heat building up is the efficiency of the motor. the losses of the motor are translated into noise and heat.

The magnetic field, that circles around the magnet is not able to translate into power for the magnet for full 100% (that is also depending on the quality of the magnets and the space between the magnets and the electro magnetical field)

The copper wires that make the magnetic field are not able to produce 100% of magnetic power out of the electric power it gets

These things toghether, and the mechanical losses, produce the heat.

The motorcharts, that are made by BK (Lehner) show the most ideal input/output ratio (efficiency) but Feigao doesn't make these kind of charts..