What happens to the ac motor plus dc
The fans of different manufacturers use different motors. If you use a series of exciting or shunt motor, dc or ac. If you're using an asynchronous motor, and you're not falling, it's going to burn, and you're not braking. If you use the permanent magnet synchronous motor, it will brake, and the electrical opportunity will be positioned in a fixed Angle. Of course, you can't add full voltage. Remember, motor coil inductance is a big, in the absence of rotating against potential offset voltage, it to direct current (dc) is equivalent to short circuit, if not, step-down will burn.
If you add direct current, you don't brake, you burn it. If you want direct current to be alternating current, you can add a rectifier, a supercharger.
Certainly not, if you add 24V to dc, there is an estimate of noise, as described above, a home rectifier
The electric fan that home belongs to the motor of the asynchronous motor Bilateral induction principle, it is the principle of the three-phase alternating current from the stator side, with conductor can produce electromagnetic field around it after the power supply, and then you think, because he is a three-phase alternating current, size and phase is changed over time, so here is the key, the magnetic field generated by the change of three-phase alternating current is also must change, is actually a rotating circular magnetic field, the magnetic spin cutting rotor - - into the shaft of the electric fan blades is understandable, by Faraday electromagnetic induction principle, or lenz theorem, would induce electromotive force on the rotor, resulting in a rotating torque spin. You said with direct current situation, in the understanding of this principle is not hard to find, after due to add on the stator dc direction are the same size, won't produce rotating magnetomotive force, so the fan will not turn, unable to work. There are some things that I want to help you with
