could this be explained to a none physicist,?

Question

if I couple a one HP. motor to to a magnetic brake M/C, and measure the current and temperature of the motor to prove that 746 watts are being consumed. where does the energy go! I made a 8 pole rotor attached to a motor shaft and positioned a stator with 8 poles alternating polarity " 1mm. gap accross the rotor and there was no temperature rise in the poles of the permenant magnetics in fact they were slightly cooler due to air flow. do we write this off because of "magnetic mystery" if it is because there is no friction, it is there in slip when an electric motor requires torque

Answer 1

I think magnetic and electrical energies are being produced and consumed there. you might need an electric consumer in your system to understand the way the energy flows.

Answer 2

I don't know what an "M/C" is, so I can't state definitively. But since you describe it as a brake, that would be the load and that would consume the power of the motor.

Also, if I'm not mistaken, a DC permag motor requires an ODD number of poles to operate; otherwise the magnetic fields are symmetrical and they apply no torque. This is certainly the case in all the DC motors I've dismantled. If you're running on AC, a permanent magnet motor would be better replaced with a dual set of eletromagnets, to cancel out the oscillating EMF.

Answer 3

Apart from friction you don't have a load. When you add a load such as light bulbs or a whacking great resistor then you'll see where the energy goes in heat or light.

Answer 4

you mean a nun who is a physicist? No