... I've found an electric motor (coupled with a propeller to act as a fan) in a microwave oven. This motor absorbs about 25W at 230V/50Hz single-phase. Its stator (being a coil on a ferro-magnetic material) is directly connected to the mains. it's brushless: the stator makes a sort of iron cylinder rotate (rotor) through a magnetic circuit.ABOVE ALL: according to my tests (with volmeters), this motor seems to be irreversbile, ie it functions as a motor BUT when I use it as a generator, it doesn't provide any electricity.So, how should I fix that problem?
Sounds like the motor is an AC induction motor. Such a motor cannot be reversed and used as a generator. The reason is that this motor has no permanent magnets, and with no current, the motor creates no magnetic fields. With no magnetic fields present, there will never be any induced voltage according to Faraday's Law.
sounds like a terribly inefficient electrical motor, where most of the energy applied to the stator is being dissipated as heat, or friction.
In functional phrases the 2nd legislation of thermodynamics is truthfully weaved within the first. It is a legislation of equilibrium. Basically the legislation states that you just can't receive anything with out paying a cost. In different phrases you get not anything for not anything, Hence there's a predominant precept that says Some Entities don't have got to be Proved.
Ac motors use windings on the stator instead of permanent magnets, like on a dc motor. This is why it won't generate electricity, because there is no natural adverse magnetic field to generate the electricity. The reason why this particular ac motor will not reverse is because of how the windings are constructed in the stator. It will only operate one way because of the phase of ac electricity.
